.gitignore

@@ -1 +1,2 @@
 /mobile/.env
+/Backend/attachments/*

Backend/Api/Auth/AddProfileImage.go

@@ -0,0 +1,50 @@
+package Auth
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"net/http"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Util"
+)
+
+// AddProfileImage adds a profile image
+func AddProfileImage(w http.ResponseWriter, r *http.Request) {
+	var (
+		user        Models.User
+		attachment  Models.Attachment
+		decodedFile []byte
+		fileName    string
+		err         error
+	)
+
+	// Ignore error here, as middleware should handle auth
+	user, _ = CheckCookieCurrentUser(w, r)
+
+	err = json.NewDecoder(r.Body).Decode(&attachment)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	if attachment.Data == "" {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	decodedFile, err = base64.StdEncoding.DecodeString(attachment.Data)
+	fileName, err = Util.WriteFile(decodedFile)
+	attachment.FilePath = fileName
+
+	user.Attachment = attachment
+
+	err = Database.UpdateUser(user.ID.String(), &user)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}

Backend/Api/Auth/ChangeMessageExpiry.go

@@ -10,7 +10,7 @@ import (
 )
 
 type rawChangeMessageExpiry struct {
-	MessageExpiry string `json:"message_exipry"`
+	MessageExpiry string `json:"message_expiry"`
 }
 
 // ChangeMessageExpiry handles changing default message expiry for user
@@ -37,7 +37,7 @@ func ChangeMessageExpiry(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	user.AsymmetricPrivateKey = changeMessageExpiry.MessageExpiry
+	user.MessageExpiryDefault.Scan(changeMessageExpiry.MessageExpiry)
 
 	err = Database.UpdateUser(
 		user.ID.String(),

Backend/Api/Auth/Login.go

@@ -16,73 +16,43 @@ type credentials struct {
 }
 
 type loginResponse struct {
-	Status               string `json:"status"`
-	Message              string `json:"message"`
-	AsymmetricPublicKey  string `json:"asymmetric_public_key"`
-	AsymmetricPrivateKey string `json:"asymmetric_private_key"`
 	UserID               string `json:"user_id"`
 	Username             string `json:"username"`
+	AsymmetricPublicKey  string `json:"asymmetric_public_key"`
+	AsymmetricPrivateKey string `json:"asymmetric_private_key"`
+	SymmetricKey         string `json:"symmetric_key"`
 	MessageExpiryDefault string `json:"message_expiry_default"`
+	ImageLink            string `json:"image_link"`
 }
 
-func makeLoginResponse(w http.ResponseWriter, code int, message, pubKey, privKey string, user Models.User) {
+// Login logs the user into the system
+func Login(w http.ResponseWriter, r *http.Request) {
 	var (
-		status           = "error"
+		creds            credentials
+		user             Models.User
+		session          Models.Session
+		expiresAt        time.Time
 		messageExpiryRaw driver.Value
 		messageExpiry    string
+		imageLink        string
 		returnJSON       []byte
 		err              error
 	)
-	if code >= 200 && code <= 300 {
-		status = "success"
-	}
-
-	messageExpiryRaw, _ = user.MessageExpiryDefault.Value()
-	messageExpiry, _ = messageExpiryRaw.(string)
-
-	returnJSON, err = json.MarshalIndent(loginResponse{
-		Status:               status,
-		Message:              message,
-		AsymmetricPublicKey:  pubKey,
-		AsymmetricPrivateKey: privKey,
-		UserID:               user.ID.String(),
-		Username:             user.Username,
-		MessageExpiryDefault: messageExpiry,
-	}, "", "  ")
-	if err != nil {
-		http.Error(w, "Error", http.StatusInternalServerError)
-		return
-	}
-
-	// Return updated json
-	w.WriteHeader(code)
-	w.Write(returnJSON)
-}
-
-// Login logs the user into the system
-func Login(w http.ResponseWriter, r *http.Request) {
-	var (
-		creds     credentials
-		userData  Models.User
-		session   Models.Session
-		expiresAt time.Time
-		err       error
-	)
 
 	err = json.NewDecoder(r.Body).Decode(&creds)
 	if err != nil {
-		makeLoginResponse(w, http.StatusInternalServerError, "An error occurred", "", "", userData)
+		http.Error(w, "Unauthorized", http.StatusUnauthorized)
 		return
 	}
 
-	userData, err = Database.GetUserByUsername(creds.Username)
+	user, err = Database.GetUserByUsername(creds.Username)
 	if err != nil {
-		makeLoginResponse(w, http.StatusUnauthorized, "An error occurred", "", "", userData)
+		http.Error(w, "Unauthorized", http.StatusUnauthorized)
 		return
 	}
 
-	if !CheckPasswordHash(creds.Password, userData.Password) {
-		makeLoginResponse(w, http.StatusUnauthorized, "An error occurred", "", "", userData)
+	if !CheckPasswordHash(creds.Password, user.Password) {
+		http.Error(w, "Unauthorized", http.StatusUnauthorized)
 		return
 	}
 
@@ -90,13 +60,13 @@ func Login(w http.ResponseWriter, r *http.Request) {
 	expiresAt = time.Now().Add(12 * time.Hour)
 
 	session = Models.Session{
-		UserID: userData.ID,
+		UserID: user.ID,
 		Expiry: expiresAt,
 	}
 
 	err = Database.CreateSession(&session)
 	if err != nil {
-		makeLoginResponse(w, http.StatusUnauthorized, "An error occurred", "", "", userData)
+		http.Error(w, "Unauthorized", http.StatusUnauthorized)
 		return
 	}
 
@@ -106,12 +76,29 @@ func Login(w http.ResponseWriter, r *http.Request) {
 		Expires: expiresAt,
 	})
 
-	makeLoginResponse(
-		w,
-		http.StatusOK,
-		"Successfully logged in",
-		userData.AsymmetricPublicKey,
-		userData.AsymmetricPrivateKey,
-		userData,
-	)
+	if user.AttachmentID != nil {
+		imageLink = user.Attachment.FilePath
+	}
+
+	messageExpiryRaw, _ = user.MessageExpiryDefault.Value()
+	messageExpiry, _ = messageExpiryRaw.(string)
+
+	returnJSON, err = json.MarshalIndent(loginResponse{
+		UserID:               user.ID.String(),
+		Username:             user.Username,
+		AsymmetricPublicKey:  user.AsymmetricPublicKey,
+		AsymmetricPrivateKey: user.AsymmetricPrivateKey,
+		SymmetricKey:         user.SymmetricKey,
+		MessageExpiryDefault: messageExpiry,
+		ImageLink:            imageLink,
+	}, "", "  ")
+
+	if err != nil {
+		http.Error(w, "Unauthorized", http.StatusUnauthorized)
+		return
+	}
+
+	// Return updated json
+	w.WriteHeader(http.StatusOK)
+	w.Write(returnJSON)
 }

Backend/Api/Friends/AcceptFriendRequest.go

@@ -32,7 +32,7 @@ func AcceptFriendRequest(w http.ResponseWriter, r *http.Request) {
 
 	oldFriendRequest, err = Database.GetFriendRequestByID(friendRequestID)
 	if err != nil {
-		http.Error(w, "Error", http.StatusInternalServerError)
+		http.Error(w, "Not Found", http.StatusNotFound)
 		return
 	}
 

Backend/Api/Messages/AddConversationImage.go

@@ -0,0 +1,64 @@
+package Messages
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"net/http"
+
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Util"
+	"github.com/gorilla/mux"
+)
+
+// AddConversationImage adds an image for a conversation icon
+func AddConversationImage(w http.ResponseWriter, r *http.Request) {
+	var (
+		attachment         Models.Attachment
+		conversationDetail Models.ConversationDetail
+		urlVars            map[string]string
+		detailID           string
+		decodedFile        []byte
+		fileName           string
+		ok                 bool
+		err                error
+	)
+
+	urlVars = mux.Vars(r)
+	detailID, ok = urlVars["detailID"]
+	if !ok {
+		http.Error(w, "Not Found", http.StatusNotFound)
+		return
+	}
+
+	conversationDetail, err = Database.GetConversationDetailByID(detailID)
+	if err != nil {
+		http.Error(w, "Not Found", http.StatusNotFound)
+		return
+	}
+
+	err = json.NewDecoder(r.Body).Decode(&attachment)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	if attachment.Data == "" {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	decodedFile, err = base64.StdEncoding.DecodeString(attachment.Data)
+	fileName, err = Util.WriteFile(decodedFile)
+	attachment.FilePath = fileName
+
+	conversationDetail.Attachment = attachment
+
+	err = Database.UpdateConversationDetail(&conversationDetail)
+	if err != nil {
+		http.Error(w, "Error", http.StatusInternalServerError)
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}

Backend/Api/Messages/Conversations.go

@@ -14,10 +14,10 @@ import (
 // EncryptedConversationList returns an encrypted list of all Conversations
 func EncryptedConversationList(w http.ResponseWriter, r *http.Request) {
 	var (
-		userConversations []Models.UserConversation
-		userSession       Models.Session
-		returnJSON        []byte
-		err               error
+		conversationDetails []Models.UserConversation
+		userSession         Models.Session
+		returnJSON          []byte
+		err                 error
 	)
 
 	userSession, err = Auth.CheckCookie(r)
@@ -26,7 +26,7 @@ func EncryptedConversationList(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	userConversations, err = Database.GetUserConversationsByUserId(
+	conversationDetails, err = Database.GetUserConversationsByUserId(
 		userSession.UserID.String(),
 	)
 	if err != nil {
@@ -34,7 +34,7 @@ func EncryptedConversationList(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	returnJSON, err = json.MarshalIndent(userConversations, "", "  ")
+	returnJSON, err = json.MarshalIndent(conversationDetails, "", "  ")
 	if err != nil {
 		http.Error(w, "Error", http.StatusInternalServerError)
 		return
@@ -47,12 +47,14 @@ func EncryptedConversationList(w http.ResponseWriter, r *http.Request) {
 // EncryptedConversationDetailsList returns an encrypted list of all  ConversationDetails
 func EncryptedConversationDetailsList(w http.ResponseWriter, r *http.Request) {
 	var (
-		userConversations []Models.ConversationDetail
-		query             url.Values
-		conversationIds   []string
-		returnJSON        []byte
-		ok                bool
-		err               error
+		conversationDetails []Models.ConversationDetail
+		detail              Models.ConversationDetail
+		query               url.Values
+		conversationIds     []string
+		returnJSON          []byte
+		i                   int
+		ok                  bool
+		err                 error
 	)
 
 	query = r.URL.Query()
@@ -62,10 +64,9 @@ func EncryptedConversationDetailsList(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	// TODO: Fix error handling here
 	conversationIds = strings.Split(conversationIds[0], ",")
 
-	userConversations, err = Database.GetConversationDetailsByIds(
+	conversationDetails, err = Database.GetConversationDetailsByIds(
 		conversationIds,
 	)
 	if err != nil {
@@ -73,7 +74,15 @@ func EncryptedConversationDetailsList(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	returnJSON, err = json.MarshalIndent(userConversations, "", "  ")
+	for i, detail = range conversationDetails {
+		if detail.AttachmentID == nil {
+			continue
+		}
+
+		conversationDetails[i].Attachment.ImageLink = detail.Attachment.FilePath
+	}
+
+	returnJSON, err = json.MarshalIndent(conversationDetails, "", "  ")
 	if err != nil {
 		http.Error(w, "Error", http.StatusInternalServerError)
 		return

Backend/Api/Messages/CreateMessage.go

@@ -1,40 +1,54 @@
 package Messages
 
 import (
+	"encoding/base64"
 	"encoding/json"
 	"net/http"
 
 	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
 	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Util"
 )
 
-type RawMessageData struct {
+type rawMessageData struct {
 	MessageData Models.MessageData `json:"message_data"`
 	Messages    []Models.Message   `json:"message"`
 }
 
+// CreateMessage sends a message
 func CreateMessage(w http.ResponseWriter, r *http.Request) {
 	var (
-		rawMessageData RawMessageData
-		err            error
+		messagesData []rawMessageData
+		messageData  rawMessageData
+		decodedFile  []byte
+		fileName     string
+		err          error
 	)
 
-	err = json.NewDecoder(r.Body).Decode(&rawMessageData)
+	err = json.NewDecoder(r.Body).Decode(&messagesData)
 	if err != nil {
 		http.Error(w, "Error", http.StatusInternalServerError)
 		return
 	}
 
-	err = Database.CreateMessageData(&rawMessageData.MessageData)
-	if err != nil {
-		http.Error(w, "Error", http.StatusInternalServerError)
-		return
-	}
-
-	err = Database.CreateMessages(&rawMessageData.Messages)
-	if err != nil {
-		http.Error(w, "Error", http.StatusInternalServerError)
-		return
+	for _, messageData = range messagesData {
+		if messageData.MessageData.Data == "" {
+			decodedFile, err = base64.StdEncoding.DecodeString(messageData.MessageData.Attachment.Data)
+			fileName, err = Util.WriteFile(decodedFile)
+			messageData.MessageData.Attachment.FilePath = fileName
+		}
+
+		err = Database.CreateMessageData(&messageData.MessageData)
+		if err != nil {
+			http.Error(w, "Error", http.StatusInternalServerError)
+			return
+		}
+
+		err = Database.CreateMessages(&messageData.Messages)
+		if err != nil {
+			http.Error(w, "Error", http.StatusInternalServerError)
+			return
+		}
 	}
 
 	w.WriteHeader(http.StatusOK)

Backend/Api/Messages/MessageThread.go

@@ -14,9 +14,11 @@ import (
 func Messages(w http.ResponseWriter, r *http.Request) {
 	var (
 		messages       []Models.Message
+		message        Models.Message
 		urlVars        map[string]string
 		associationKey string
 		returnJSON     []byte
+		i              int
 		ok             bool
 		err            error
 	)
@@ -34,6 +36,14 @@ func Messages(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	for i, message = range messages {
+		if message.MessageData.AttachmentID == nil {
+			continue
+		}
+
+		messages[i].MessageData.Attachment.ImageLink = message.MessageData.Attachment.FilePath
+	}
+
 	returnJSON, err = json.MarshalIndent(messages, "", "  ")
 	if err != nil {
 		http.Error(w, "Error", http.StatusInternalServerError)

Backend/Api/Messages/UpdateConversation.go

@@ -10,16 +10,17 @@ import (
 	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
 )
 
-type RawUpdateConversationData struct {
+type rawUpdateConversationData struct {
 	ID                string                          `json:"id"`
 	Name              string                          `json:"name"`
 	Users             []Models.ConversationDetailUser `json:"users"`
 	UserConversations []Models.UserConversation       `json:"user_conversations"`
 }
 
+// UpdateConversation updates the conversation data, such as title, users, etc
 func UpdateConversation(w http.ResponseWriter, r *http.Request) {
 	var (
-		rawConversationData RawCreateConversationData
+		rawConversationData rawUpdateConversationData
 		messageThread       Models.ConversationDetail
 		err                 error
 	)
@@ -52,5 +53,5 @@ func UpdateConversation(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
-	w.WriteHeader(http.StatusOK)
+	w.WriteHeader(http.StatusNoContent)
 }

Backend/Api/Routes.go

@@ -44,6 +44,7 @@ func InitAPIEndpoints(router *mux.Router) {
 	var (
 		api     *mux.Router
 		authAPI *mux.Router
+		fs      http.Handler
 	)
 
 	log.Println("Initializing API routes...")
@@ -63,6 +64,7 @@ func InitAPIEndpoints(router *mux.Router) {
 
 	authAPI.HandleFunc("/change_password", Auth.ChangePassword).Methods("POST")
 	authAPI.HandleFunc("/message_expiry", Auth.ChangeMessageExpiry).Methods("POST")
+	authAPI.HandleFunc("/image", Auth.AddProfileImage).Methods("POST")
 
 	authAPI.HandleFunc("/users", Users.SearchUsers).Methods("GET")
 
@@ -76,7 +78,12 @@ func InitAPIEndpoints(router *mux.Router) {
 	authAPI.HandleFunc("/conversation_details", Messages.EncryptedConversationDetailsList).Methods("GET")
 	authAPI.HandleFunc("/conversations", Messages.CreateConversation).Methods("POST")
 	authAPI.HandleFunc("/conversations", Messages.UpdateConversation).Methods("PUT")
+	authAPI.HandleFunc("/conversations/{detailID}/image", Messages.AddConversationImage).Methods("POST")
 
 	authAPI.HandleFunc("/message", Messages.CreateMessage).Methods("POST")
 	authAPI.HandleFunc("/messages/{associationKey}", Messages.Messages).Methods("GET")
+
+	// TODO: Add authentication to this route
+	fs = http.FileServer(http.Dir("./attachments/"))
+	router.PathPrefix("/files/").Handler(http.StripPrefix("/files/", fs))
 }

Backend/Database/Attachments.go

@@ -0,0 +1,42 @@
+package Database
+
+import (
+	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
+
+	"gorm.io/gorm"
+	"gorm.io/gorm/clause"
+)
+
+// GetAttachmentByID gets the attachment record by the id
+func GetAttachmentByID(id string) (Models.MessageData, error) {
+	var (
+		messageData Models.MessageData
+		err         error
+	)
+
+	err = DB.Preload(clause.Associations).
+		First(&messageData, "id = ?", id).
+		Error
+
+	return messageData, err
+}
+
+// CreateAttachment creates the attachment record
+func CreateAttachment(messageData *Models.MessageData) error {
+	var (
+		err error
+	)
+
+	err = DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Create(messageData).
+		Error
+
+	return err
+}
+
+// DeleteAttachment deletes the attachment record
+func DeleteAttachment(messageData *Models.MessageData) error {
+	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
+		Delete(messageData).
+		Error
+}

Backend/Database/ConversationDetails.go

@@ -7,7 +7,8 @@ import (
 	"gorm.io/gorm/clause"
 )
 
-func GetConversationDetailById(id string) (Models.ConversationDetail, error) {
+// GetConversationDetailByID gets by id
+func GetConversationDetailByID(id string) (Models.ConversationDetail, error) {
 	var (
 		messageThread Models.ConversationDetail
 		err           error
@@ -21,6 +22,7 @@ func GetConversationDetailById(id string) (Models.ConversationDetail, error) {
 	return messageThread, err
 }
 
+// GetConversationDetailsByIds gets by multiple ids
 func GetConversationDetailsByIds(id []string) ([]Models.ConversationDetail, error) {
 	var (
 		messageThread []Models.ConversationDetail
@@ -35,12 +37,14 @@ func GetConversationDetailsByIds(id []string) ([]Models.ConversationDetail, erro
 	return messageThread, err
 }
 
+// CreateConversationDetail creates a ConversationDetail record
 func CreateConversationDetail(messageThread *Models.ConversationDetail) error {
 	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
 		Create(messageThread).
 		Error
 }
 
+// UpdateConversationDetail updates a ConversationDetail record
 func UpdateConversationDetail(messageThread *Models.ConversationDetail) error {
 	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
 		Where("id = ?", messageThread.ID).
@@ -48,6 +52,7 @@ func UpdateConversationDetail(messageThread *Models.ConversationDetail) error {
 		Error
 }
 
+// DeleteConversationDetail deletes a ConversationDetail record
 func DeleteConversationDetail(messageThread *Models.ConversationDetail) error {
 	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
 		Delete(messageThread).

Backend/Database/Init.go

@@ -20,6 +20,7 @@ var DB *gorm.DB
 func getModels() []interface{} {
 	return []interface{}{
 		&Models.Session{},
+		&Models.Attachment{},
 		&Models.User{},
 		&Models.FriendRequest{},
 		&Models.MessageData{},

Backend/Database/Messages.go

@@ -7,7 +7,8 @@ import (
 	"gorm.io/gorm/clause"
 )
 
-func GetMessageById(id string) (Models.Message, error) {
+// GetMessageByID gets a message
+func GetMessageByID(id string) (Models.Message, error) {
 	var (
 		message Models.Message
 		err     error
@@ -20,6 +21,8 @@ func GetMessageById(id string) (Models.Message, error) {
 	return message, err
 }
 
+// GetMessagesByAssociationKey for getting whole thread
+// TODO: Add pagination
 func GetMessagesByAssociationKey(associationKey string) ([]Models.Message, error) {
 	var (
 		messages []Models.Message
@@ -27,12 +30,14 @@ func GetMessagesByAssociationKey(associationKey string) ([]Models.Message, error
 	)
 
 	err = DB.Preload("MessageData").
+		Preload("MessageData.Attachment").
 		Find(&messages, "association_key = ?", associationKey).
 		Error
 
 	return messages, err
 }
 
+// CreateMessage creates a message record
 func CreateMessage(message *Models.Message) error {
 	var err error
 
@@ -43,6 +48,7 @@ func CreateMessage(message *Models.Message) error {
 	return err
 }
 
+// CreateMessages creates multiple records
 func CreateMessages(messages *[]Models.Message) error {
 	var err error
 
@@ -53,6 +59,7 @@ func CreateMessages(messages *[]Models.Message) error {
 	return err
 }
 
+// DeleteMessage deletes a message
 func DeleteMessage(message *Models.Message) error {
 	return DB.Session(&gorm.Session{FullSaveAssociations: true}).
 		Delete(message).

Backend/Database/Seeder/FriendSeeder.go

@@ -2,6 +2,8 @@ package Seeder
 
 import (
 	"encoding/base64"
+	"io"
+	"os"
 	"time"
 
 	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
@@ -56,6 +58,28 @@ func seedFriend(userRequestTo, userRequestFrom Models.User, accepted bool) error
 	return Database.CreateFriendRequest(&friendRequest)
 }
 
+func copyProfileImage() error {
+	var (
+		srcFile *os.File
+		dstFile *os.File
+		err     error
+	)
+
+	srcFile, err = os.Open("./Database/Seeder/profile_image_enc.dat")
+	if err != nil {
+		return err
+	}
+
+	dstFile, err = os.Create("./attachments/profile_image")
+	if err != nil {
+		return err
+	}
+
+	defer dstFile.Close()
+	_, err = io.Copy(dstFile, srcFile)
+	return err
+}
+
 // SeedFriends creates dummy friends for testing/development
 func SeedFriends() {
 	var (
@@ -66,6 +90,11 @@ func SeedFriends() {
 		err           error
 	)
 
+	err = copyProfileImage()
+	if err != nil {
+		panic(err)
+	}
+
 	primaryUser, err = Database.GetUserByUsername("testUser")
 	if err != nil {
 		panic(err)

Backend/Database/Seeder/UserSeeder.go

@@ -1,6 +1,8 @@
 package Seeder
 
 import (
+	"encoding/base64"
+
 	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Api/Auth"
 	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
 	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
@@ -23,10 +25,16 @@ var userNames = []string{
 func createUser(username string) (Models.User, error) {
 	var (
 		userData Models.User
+		userKey  aesKey
 		password string
 		err      error
 	)
 
+	userKey, err = generateAesKey()
+	if err != nil {
+		panic(err)
+	}
+
 	password, err = Auth.HashPassword("password")
 	if err != nil {
 		return Models.User{}, err
@@ -37,12 +45,16 @@ func createUser(username string) (Models.User, error) {
 		Password:             password,
 		AsymmetricPrivateKey: encryptedPrivateKey,
 		AsymmetricPublicKey:  publicKey,
+		SymmetricKey: base64.StdEncoding.EncodeToString(
+			encryptWithPublicKey(userKey.Key, decodedPublicKey),
+		),
 	}
 
 	err = Database.CreateUser(&userData)
 	return userData, err
 }
 
+// SeedUsers used to create dummy users for testing & development
 func SeedUsers() {
 	var (
 		i   int

Backend/Models/Attachments.go

@@ -0,0 +1,11 @@
+package Models
+
+// Attachment holds the attachment data
+type Attachment struct {
+	Base
+	FilePath  string `gorm:"not null" json:"-"`
+	Mimetype  string `gorm:"not null" json:"mimetype"`
+	Extension string `gorm:"not null" json:"extension"`
+	Data      string `gorm:"-"        json:"data"`
+	ImageLink string `gorm:"-"        json:"image_link"`
+}

Backend/Models/Conversations.go

@@ -7,9 +7,11 @@ import (
 // ConversationDetail stores the name for the conversation
 type ConversationDetail struct {
 	Base
-	Name    string                   `gorm:"not null" json:"name"` // Stored encrypted
-	Users   []ConversationDetailUser `                json:"users"`
-	TwoUser string                   `gorm:"not null" json:"two_user"`
+	Name         string                   `gorm:"not null" json:"name"` // Stored encrypted
+	Users        []ConversationDetailUser `                json:"users"`
+	TwoUser      string                   `gorm:"not null" json:"two_user"`
+	AttachmentID *uuid.UUID               `                json:"attachment_id"`
+	Attachment   Attachment               `                json:"attachment"`
 }
 
 // ConversationDetailUser all users associated with a customer

Backend/Models/Friends.go

@@ -11,8 +11,9 @@ type FriendRequest struct {
 	Base
 	UserID                    uuid.UUID    `gorm:"type:uuid;column:user_id;not null;" json:"user_id"`
 	User                      User         `                                          json:"user"`
-	FriendID                  string       `gorm:"not null"                           json:"friend_id"`             // Stored encrypted
-	FriendUsername            string       `                                          json:"friend_username"`       // Stored encrypted
+	FriendID                  string       `gorm:"not null"                           json:"friend_id"`       // Stored encrypted
+	FriendUsername            string       `                                          json:"friend_username"` // Stored encrypted
+	FriendImagePath           string       `                                          json:"friend_image_path"`
 	FriendPublicAsymmetricKey string       `                                          json:"asymmetric_public_key"` // Stored encrypted
 	SymmetricKey              string       `gorm:"not null"                           json:"symmetric_key"`         // Stored encrypted
 	AcceptedAt                sql.NullTime `                                          json:"accepted_at"`

Backend/Models/Messages.go

@@ -11,9 +11,11 @@ import (
 // encrypted through the Message.SymmetricKey
 type MessageData struct {
 	Base
-	Data         string `gorm:"not null" json:"data"`          // Stored encrypted
-	SenderID     string `gorm:"not null" json:"sender_id"`     // Stored encrypted
-	SymmetricKey string `gorm:"not null" json:"symmetric_key"` // Stored encrypted
+	Data         string     `                json:"data"` // Stored encrypted
+	AttachmentID *uuid.UUID `                json:"attachment_id"`
+	Attachment   Attachment `                json:"attachment"`
+	SenderID     string     `gorm:"not null" json:"sender_id"`     // Stored encrypted
+	SymmetricKey string     `gorm:"not null" json:"symmetric_key"` // Stored encrypted
 }
 
 // Message holds data pertaining to each users' message

Backend/Models/Users.go

@@ -3,6 +3,7 @@ package Models
 import (
 	"database/sql/driver"
 
+	"github.com/gofrs/uuid"
 	"gorm.io/gorm"
 )
 
@@ -58,6 +59,17 @@ type User struct {
 	ConfirmPassword      string        `gorm:"-"                 json:"confirm_password"`
 	AsymmetricPrivateKey string        `gorm:"not null"          json:"asymmetric_private_key"` // Stored encrypted
 	AsymmetricPublicKey  string        `gorm:"not null"          json:"asymmetric_public_key"`
-	MessageExpiryDefault MessageExpiry `gorm:"default:no_expiry" json:"-" sql:"type:ENUM('fifteen_min', 'thirty_min', 'one_hour', 'three_hour', 'six_hour', 'twelve_hour', 'one_day', 'three_day')"` // Stored encrypted
-
+	SymmetricKey         string        `gorm:"not null"          json:"symmetric_key"` // Stored encrypted
+	AttachmentID         *uuid.UUID    `                         json:"attachment_id"`
+	Attachment           Attachment    `                         json:"attachment"`
+	MessageExpiryDefault MessageExpiry `gorm:"default:no_expiry" json:"-" sql:"type:ENUM(
+        'fifteen_min',
+        'thirty_min',
+        'one_hour',
+        'three_hour',
+        'six_hour',
+        'twelve_hour',
+        'one_day',
+        'three_day'
+    )"` // Stored encrypted
 }

Backend/Util/Files.go

@@ -0,0 +1,46 @@
+package Util
+
+import (
+	"fmt"
+	"os"
+)
+
+// WriteFile to disk
+func WriteFile(contents []byte) (string, error) {
+	var (
+		fileName string
+		filePath string
+		cwd      string
+		f        *os.File
+		err      error
+	)
+
+	cwd, err = os.Getwd()
+	if err != nil {
+		return fileName, err
+	}
+
+	fileName = RandomString(32)
+
+	filePath = fmt.Sprintf(
+		"%s/attachments/%s",
+		cwd,
+		fileName,
+	)
+
+	f, err = os.Create(filePath)
+
+	if err != nil {
+		return fileName, err
+	}
+
+	defer f.Close()
+
+	_, err = f.Write(contents)
+
+	if err != nil {
+		return fileName, err
+	}
+
+	return fileName, nil
+}

mobile/ios/Runner/Info.plist

@@ -47,5 +47,11 @@
     <true/>
     <key>NSCameraUsageDescription</key>
     <string>This app needs camera access to scan QR codes</string>
+    <key>NSPhotoLibraryUsageDescription</key>
+    <string>Upload images for screen background</string>
+    <key>NSCameraUsageDescription</key>
+    <string>Upload image from camera for screen background</string>
+    <key>NSMicrophoneUsageDescription</key>
+    <string>Post videos to profile</string>
 </dict>
 </plist>

mobile/lib/components/custom_circle_avatar.dart

@@ -1,3 +1,5 @@
+import 'dart:io';
+
 import 'package:flutter/material.dart';
 
 enum AvatarTypes {
@@ -6,74 +8,107 @@ enum AvatarTypes {
   image,
 }
 
-class CustomCircleAvatar extends StatefulWidget {
+class CustomCircleAvatar extends StatelessWidget {
   final String? initials;
   final Icon? icon;
-  final String? imagePath;
+  final File? image;
+  final Function ()? editImageCallback;
   final double radius;
 
   const CustomCircleAvatar({
-      Key? key,
-      this.initials,
-      this.icon,
-      this.imagePath,
-      this.radius = 20,
+    Key? key,
+    this.initials,
+    this.icon,
+    this.image,
+    this.editImageCallback,
+    this.radius = 20,
   }) : super(key: key);
 
-  @override
-  _CustomCircleAvatarState createState() => _CustomCircleAvatarState();
-}
-
-class _CustomCircleAvatarState extends State<CustomCircleAvatar>{
-  AvatarTypes type = AvatarTypes.image;
-
-  @override
-  void initState() {
-      super.initState();
+  Widget avatar() {
+    AvatarTypes? type;
 
-      if (widget.imagePath != null) {
-          type = AvatarTypes.image;
-          return;
-      }
+    if (icon != null) {
+      type = AvatarTypes.icon;
+    }
 
-      if (widget.icon != null) {
-          type = AvatarTypes.icon;
-          return;
-      }
+    if (initials != null) {
+      type = AvatarTypes.initials;
+    }
 
-      if (widget.initials != null) {
-          type = AvatarTypes.initials;
-          return;
-      }
+    if (image != null) {
+      type = AvatarTypes.image;
+    }
 
+    if (type == null) {
       throw ArgumentError('Invalid arguments passed to CustomCircleAvatar');
-  }
+    }
 
-  Widget avatar() {
     if (type == AvatarTypes.initials) {
       return CircleAvatar(
-          backgroundColor: Colors.grey[300],
-          child: Text(widget.initials!),
-          radius: widget.radius,
+        backgroundColor: Colors.grey[300],
+        child: Text(initials!),
+        radius: radius,
       );
     }
 
     if (type == AvatarTypes.icon) {
       return CircleAvatar(
-          backgroundColor: Colors.grey[300],
-          child: widget.icon,
-          radius: widget.radius,
+        backgroundColor: Colors.grey[300],
+        child: icon,
+        radius: radius,
       );
     }
 
-    return CircleAvatar(
-        backgroundImage: AssetImage(widget.imagePath!),
-        radius: widget.radius,
+    return Container(
+      width: radius * 2,
+      height: radius * 2,
+      decoration: BoxDecoration(
+        shape: BoxShape.circle,
+        image: DecorationImage(
+          image: Image.file(image!).image,
+          fit: BoxFit.fill
+        ),
+      ),
+    );
+  }
+
+  Widget editIcon(BuildContext context) {
+    if (editImageCallback == null) {
+      return const SizedBox.shrink();
+    }
+
+    return SizedBox(
+      height: (radius * 2),
+      width: (radius * 2),
+      child: Align(
+        alignment: Alignment.bottomRight,
+        child: GestureDetector(
+          onTap: editImageCallback,
+          child: Container(
+            height: (radius / 2) + (radius / 7),
+            width: (radius / 2) + (radius / 7),
+            decoration: BoxDecoration(
+              color: Theme.of(context).scaffoldBackgroundColor,
+              borderRadius: BorderRadius.circular(30),
+            ),
+            child: Icon(
+              Icons.add,
+              color: Theme.of(context).primaryColor,
+              size: radius / 2
+            ),
+          ),
+        ),
+      ),
     );
   }
 
   @override
   Widget build(BuildContext context) {
-    return avatar();
+    return Stack(
+      children: [
+        avatar(),
+        editIcon(context),
+      ]
+    );
   }
 }

mobile/lib/components/file_picker.dart

@@ -0,0 +1,106 @@
+import 'package:flutter/material.dart';
+import 'package:image_picker/image_picker.dart';
+
+class FilePicker extends StatelessWidget {
+  FilePicker({
+    Key? key,
+    this.cameraHandle,
+    this.galleryHandleSingle,
+    this.galleryHandleMultiple,
+    this.fileHandle,
+  }) : super(key: key);
+
+  final Function(XFile image)? cameraHandle;
+  final Function(XFile image)? galleryHandleSingle;
+  final Function(List<XFile> images)? galleryHandleMultiple;
+  // TODO: Implement. Perhaps after first release?
+  final Function()? fileHandle;
+
+  final ImagePicker _picker = ImagePicker();
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: const EdgeInsets.only(top: 10, bottom: 10, left: 5, right: 5),
+      child: Row(
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: [
+          _filePickerSelection(
+            hasHandle: cameraHandle != null,
+            icon: Icons.camera_alt,
+            onTap: () async {
+              final XFile? image = await _picker.pickImage(source: ImageSource.camera);
+              if (image == null) {
+                return;
+              }
+              cameraHandle!(image);
+            },
+            context: context,
+          ),
+          _filePickerSelection(
+            hasHandle: galleryHandleSingle != null,
+            icon: Icons.image,
+            onTap: () async {
+              final XFile? image = await _picker.pickImage(source: ImageSource.gallery);
+              if (image == null) {
+                return;
+              }
+              galleryHandleSingle!(image);
+            },
+            context: context,
+          ),
+          _filePickerSelection(
+            hasHandle: galleryHandleMultiple != null,
+            icon: Icons.image,
+            onTap: () async {
+              final List<XFile>? images = await _picker.pickMultiImage();
+              if (images == null) {
+                return;
+              }
+              galleryHandleMultiple!(images);
+            },
+            context: context,
+          ),
+          _filePickerSelection(
+            hasHandle: fileHandle != null,
+            icon: Icons.file_present_sharp,
+            onTap: () {
+            },
+            context: context,
+          ),
+        ],
+      )
+    );
+  }
+
+  Widget _filePickerSelection({
+    required bool hasHandle,
+    required IconData icon,
+    required Function() onTap,
+    required BuildContext context
+  }) {
+    if (!hasHandle) {
+      return const SizedBox.shrink();
+    }
+
+    return Padding(
+      padding: const EdgeInsets.only(left: 5, right: 5),
+      child: GestureDetector(
+        onTap: onTap,
+        child: Container(
+          height: 75,
+          width: 75,
+          decoration: BoxDecoration(
+            color: Theme.of(context).primaryColor,
+            borderRadius: BorderRadius.circular(25),
+          ),
+          child: Icon(
+            icon,
+            size: 40,
+          ),
+        ),
+      ),
+    );
+  }
+}
+

mobile/lib/components/user_search_result.dart

@@ -41,7 +41,6 @@ class _UserSearchResultState extends State<UserSearchResult>{
             CustomCircleAvatar(
               initials: widget.user.username[0].toUpperCase(),
               icon: const Icon(Icons.person, size: 80),
-              imagePath: null,
               radius: 50,
             ),
             const SizedBox(height: 10),

mobile/lib/components/view_image.dart

@@ -0,0 +1,35 @@
+import 'package:Envelope/components/custom_title_bar.dart';
+import 'package:Envelope/models/image_message.dart';
+import 'package:flutter/material.dart';
+
+class ViewImage extends StatelessWidget {
+  const ViewImage({
+    Key? key,
+    required this.message,
+  }) : super(key: key);
+
+  final ImageMessage message;
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: Colors.black,
+      appBar: const CustomTitleBar(
+        title: Text(''),
+        showBack: true,
+        backgroundColor: Colors.black,
+      ),
+      body: Center(
+        child: InteractiveViewer(
+          panEnabled: false,
+          minScale: 1,
+          maxScale: 4,
+          child: Image.file(
+            message.file,
+          ),
+        )
+      ),
+    );
+  }
+}
+

mobile/lib/exceptions/update_data_exception.dart

@@ -0,0 +1,13 @@
+
+class UpdateDataException implements Exception {
+  final String _message;
+
+  UpdateDataException([
+    this._message = 'An error occured while updating data.',
+  ]);
+
+  @override
+  String toString() {
+    return _message;
+  }
+}

mobile/lib/models/conversations.dart

@@ -1,11 +1,15 @@
 import 'dart:convert';
+import 'dart:io';
 import 'dart:typed_data';
 
 import 'package:Envelope/models/messages.dart';
+import 'package:Envelope/models/text_messages.dart';
+import 'package:mime/mime.dart';
 import 'package:pointycastle/export.dart';
 import 'package:sqflite/sqflite.dart';
 import 'package:uuid/uuid.dart';
 
+import '../utils/storage/write_file.dart';
 import '/models/conversation_users.dart';
 import '/models/friends.dart';
 import '/models/my_profile.dart';
@@ -34,7 +38,7 @@ Future<Conversation> createConversation(String title, List<Friend> friends, bool
     status: ConversationStatus.pending,
     isRead: true,
   );
-  
+
   await db.insert(
     'conversations',
     conversation.toMap(),
@@ -142,6 +146,11 @@ Future<Conversation> getConversationById(String id) async {
     throw ArgumentError('Invalid user id');
   }
 
+  File? file;
+  if (maps[0]['file'] != null && maps[0]['file'] != '') {
+    file = File(maps[0]['file']);
+  }
+
   return Conversation(
     id: maps[0]['id'],
     userId: maps[0]['user_id'],
@@ -151,6 +160,7 @@ Future<Conversation> getConversationById(String id) async {
     twoUser: maps[0]['two_user'] == 1,
     status: ConversationStatus.values[maps[0]['status']],
     isRead: maps[0]['is_read'] == 1,
+    icon: file,
   );
 }
 
@@ -164,6 +174,12 @@ Future<List<Conversation>> getConversations() async {
   );
 
   return List.generate(maps.length, (i) {
+
+    File? file;
+    if (maps[i]['file'] != null && maps[i]['file'] != '') {
+      file = File(maps[i]['file']);
+    }
+
     return Conversation(
       id: maps[i]['id'],
       userId: maps[i]['user_id'],
@@ -173,6 +189,7 @@ Future<List<Conversation>> getConversations() async {
       twoUser: maps[i]['two_user'] == 1,
       status: ConversationStatus.values[maps[i]['status']],
       isRead: maps[i]['is_read'] == 1,
+      icon: file,
     );
   });
 }
@@ -184,7 +201,7 @@ Future<Conversation?> getTwoUserConversation(String userId) async {
 
   final List<Map<String, dynamic>> maps = await db.rawQuery(
     '''
-    SELECT conversations.* FROM conversations 
+    SELECT conversations.* FROM conversations
     LEFT JOIN conversation_users ON conversation_users.conversation_id = conversations.id
     WHERE conversation_users.user_id = ?
     AND conversation_users.user_id != ?
@@ -219,6 +236,7 @@ class Conversation {
   bool twoUser;
   ConversationStatus status;
   bool isRead;
+  File? icon;
 
   Conversation({
     required this.id,
@@ -229,6 +247,7 @@ class Conversation {
     required this.twoUser,
     required this.status,
     required this.isRead,
+    this.icon,
   });
 
 
@@ -297,13 +316,35 @@ class Conversation {
       });
     }
 
-    return {
+    Map<String, dynamic> returnData = {
       'id': id,
       'name': AesHelper.aesEncrypt(symKey, Uint8List.fromList(name.codeUnits)),
       'users': await getEncryptedConversationUsers(this, symKey),
       'two_user': AesHelper.aesEncrypt(symKey, Uint8List.fromList((twoUser ? 'true' : 'false').codeUnits)),
       'user_conversations': userConversations,
     };
+
+    if (icon != null) {
+      returnData['attachment'] = {
+        'data': AesHelper.aesEncrypt(symmetricKey, Uint8List.fromList(icon!.readAsBytesSync())),
+        'mimetype': lookupMimeType(icon!.path),
+        'extension': getExtension(icon!.path),
+      };
+    }
+
+    return returnData;
+  }
+
+  Map<String, dynamic> payloadImageJson() {
+    if (icon == null) {
+      return {};
+    }
+
+    return {
+      'data': AesHelper.aesEncrypt(symmetricKey, Uint8List.fromList(icon!.readAsBytesSync())),
+      'mimetype': lookupMimeType(icon!.path),
+      'extension': getExtension(icon!.path),
+    };
   }
 
   Map<String, dynamic> toMap() {
@@ -316,6 +357,7 @@ class Conversation {
       'two_user': twoUser ? 1 : 0,
       'status': status.index,
       'is_read': isRead ? 1 : 0,
+      'file': icon != null ? icon!.path : null,
     };
   }
 
@@ -348,11 +390,11 @@ class Conversation {
       return null;
     }
 
-    return Message(
+    return TextMessage(
         id: maps[0]['id'],
         symmetricKey: maps[0]['symmetric_key'],
         userSymmetricKey: maps[0]['user_symmetric_key'],
-        data: maps[0]['data'],
+        text: maps[0]['data'] ?? 'Image',
         senderId: maps[0]['sender_id'],
         senderUsername: maps[0]['sender_username'],
         associationKey: maps[0]['association_key'],

mobile/lib/models/image_message.dart

@@ -0,0 +1,145 @@
+import 'dart:convert';
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:Envelope/models/my_profile.dart';
+import 'package:Envelope/utils/storage/get_file.dart';
+import 'package:Envelope/utils/storage/write_file.dart';
+import 'package:mime/mime.dart';
+import 'package:pointycastle/pointycastle.dart';
+import 'package:uuid/uuid.dart';
+
+import '/models/conversations.dart';
+import '/models/messages.dart';
+import '/utils/encryption/aes_helper.dart';
+import '/utils/encryption/crypto_utils.dart';
+import '/utils/strings.dart';
+
+class ImageMessage extends Message {
+  File file;
+
+  ImageMessage({
+    id,
+    symmetricKey,
+    userSymmetricKey,
+    senderId,
+    senderUsername,
+    associationKey,
+    createdAt,
+    failedToSend,
+    required this.file,
+  }) : super(
+    id: id,
+    symmetricKey: symmetricKey,
+    userSymmetricKey: userSymmetricKey,
+    senderId: senderId,
+    senderUsername: senderUsername,
+    associationKey: associationKey,
+    createdAt: createdAt,
+    failedToSend: failedToSend,
+  );
+
+  static Future<ImageMessage> fromJson(Map<String, dynamic> json, RSAPrivateKey privKey) async {
+    var userSymmetricKey = CryptoUtils.rsaDecrypt(
+      base64.decode(json['symmetric_key']),
+      privKey,
+    );
+
+    var symmetricKey = AesHelper.aesDecrypt(
+      userSymmetricKey,
+      base64.decode(json['message_data']['symmetric_key']),
+    );
+
+    var senderId = AesHelper.aesDecrypt(
+      base64.decode(symmetricKey),
+      base64.decode(json['message_data']['sender_id']),
+    );
+
+    File file = await getFile(
+      '$defaultServerUrl/files/${json['message_data']['attachment']['image_link']}',
+      '${json['id']}',
+      symmetricKey,
+    );
+
+    return ImageMessage(
+      id: json['id'],
+      symmetricKey: symmetricKey,
+      userSymmetricKey: base64.encode(userSymmetricKey),
+      senderId: senderId,
+      senderUsername: 'Unknown',
+      associationKey: json['association_key'],
+      createdAt: json['created_at'],
+      failedToSend: false,
+      file: file,
+    );
+  }
+
+  @override
+  Map<String, dynamic> toMap() {
+    return {
+      'id': id,
+      'symmetric_key': symmetricKey,
+      'user_symmetric_key': userSymmetricKey,
+      'file': file.path,
+      'sender_id': senderId,
+      'sender_username': senderUsername,
+      'association_key': associationKey,
+      'created_at': createdAt,
+      'failed_to_send': failedToSend ? 1 : 0,
+    };
+  }
+
+  Future<Map<String, dynamic>> payloadJson(Conversation conversation) async {
+    final String messageDataId = (const Uuid()).v4();
+
+    final symmetricKey = AesHelper.deriveKey(generateRandomString(32));
+
+    final userSymmetricKey = AesHelper.deriveKey(generateRandomString(32));
+
+    List<Map<String, String>> messages = await super.payloadJsonBase(
+      symmetricKey,
+      userSymmetricKey,
+      conversation,
+      id,
+      messageDataId,
+    );
+
+    Map<String, dynamic> messageData = {
+      'id': messageDataId,
+      'sender_id': AesHelper.aesEncrypt(symmetricKey, Uint8List.fromList(senderId.codeUnits)),
+      'symmetric_key': AesHelper.aesEncrypt(
+        userSymmetricKey,
+        Uint8List.fromList(base64.encode(symmetricKey).codeUnits),
+      ),
+      'attachment': {
+        'data': AesHelper.aesEncrypt(base64.encode(symmetricKey), Uint8List.fromList(file.readAsBytesSync())),
+        'mimetype': lookupMimeType(file.path),
+        'extension': getExtension(file.path),
+      }
+    };
+
+    return <String, dynamic>{
+      'message_data': messageData,
+      'message': messages,
+    };
+  }
+
+  @override
+  String getContent() {
+    return 'Image';
+  }
+
+  @override
+  String toString() {
+    return '''
+
+
+      id: $id
+      file: ${file.path},
+      senderId: $senderId
+      senderUsername: $senderUsername
+      associationKey: $associationKey
+      createdAt: $createdAt
+      ''';
+  }
+}

mobile/lib/models/messages.dart

@@ -1,17 +1,17 @@
 import 'dart:convert';
+import 'dart:io';
 import 'dart:typed_data';
 
-import 'package:pointycastle/export.dart';
+import 'package:pointycastle/pointycastle.dart';
 import 'package:uuid/uuid.dart';
 
+import '/models/image_message.dart';
 import '/models/conversation_users.dart';
-import '/models/conversations.dart';
 import '/models/my_profile.dart';
-import '/models/friends.dart';
-import '/utils/encryption/aes_helper.dart';
+import '/models/text_messages.dart';
+import '/models/conversations.dart';
 import '/utils/encryption/crypto_utils.dart';
 import '/utils/storage/database.dart';
-import '/utils/strings.dart';
 
 const messageTypeReceiver = 'receiver';
 const messageTypeSender = 'sender';
@@ -30,11 +30,28 @@ Future<List<Message>> getMessagesForThread(Conversation conversation) async {
   );
 
   return List.generate(maps.length, (i) {
-    return Message(
+    if (maps[i]['data'] == null) {
+
+      File file = File(maps[i]['file']);
+
+      return ImageMessage(
+        id: maps[i]['id'],
+        symmetricKey: maps[i]['symmetric_key'],
+        userSymmetricKey: maps[i]['user_symmetric_key'],
+        file: file,
+        senderId: maps[i]['sender_id'],
+        senderUsername: maps[i]['sender_username'],
+        associationKey: maps[i]['association_key'],
+        createdAt: maps[i]['created_at'],
+        failedToSend: maps[i]['failed_to_send'] == 1,
+      );
+    }
+
+    return TextMessage(
       id: maps[i]['id'],
       symmetricKey: maps[i]['symmetric_key'],
       userSymmetricKey: maps[i]['user_symmetric_key'],
-      data: maps[i]['data'],
+      text: maps[i]['data'],
       senderId: maps[i]['sender_id'],
       senderUsername: maps[i]['sender_username'],
       associationKey: maps[i]['association_key'],
@@ -42,24 +59,22 @@ Future<List<Message>> getMessagesForThread(Conversation conversation) async {
       failedToSend: maps[i]['failed_to_send'] == 1,
     );
   });
-
 }
 
 class Message {
   String id;
   String symmetricKey;
   String userSymmetricKey;
-  String data;
   String senderId;
   String senderUsername;
   String associationKey;
   String createdAt;
   bool failedToSend;
+
   Message({
     required this.id,
     required this.symmetricKey,
     required this.userSymmetricKey,
-    required this.data,
     required this.senderId,
     required this.senderUsername,
     required this.associationKey,
@@ -67,42 +82,13 @@ class Message {
     required this.failedToSend,
   });
 
-
-  factory Message.fromJson(Map<String, dynamic> json, RSAPrivateKey privKey) {
-    var userSymmetricKey = CryptoUtils.rsaDecrypt(
-      base64.decode(json['symmetric_key']),
-      privKey,
-    );
-
-    var symmetricKey = AesHelper.aesDecrypt(
-      userSymmetricKey,
-      base64.decode(json['message_data']['symmetric_key']),
-    );
-
-    var senderId = AesHelper.aesDecrypt(
-      base64.decode(symmetricKey),
-      base64.decode(json['message_data']['sender_id']),
-    );
-
-    var data = AesHelper.aesDecrypt(
-      base64.decode(symmetricKey),
-      base64.decode(json['message_data']['data']),
-    );
-
-    return Message(
-      id: json['id'],
-      symmetricKey: symmetricKey,
-      userSymmetricKey: base64.encode(userSymmetricKey),
-      data: data,
-      senderId: senderId,
-      senderUsername: 'Unknown',
-      associationKey: json['association_key'],
-      createdAt: json['created_at'],
-      failedToSend: false,
-    );
-  }
-
-  Future<String> payloadJson(Conversation conversation, String messageId) async {
+  Future<List<Map<String, String>>> payloadJsonBase(
+    Uint8List symmetricKey,
+    Uint8List userSymmetricKey,
+    Conversation conversation,
+    String messageId,
+    String messageDataId,
+  ) async {
     MyProfile profile = await MyProfile.getProfile();
     if (profile.publicKey == null) {
       throw Exception('Could not get profile.publicKey');
@@ -110,11 +96,6 @@ class Message {
 
     RSAPublicKey publicKey = profile.publicKey!;
 
-    final String messageDataId = (const Uuid()).v4();
-
-    final userSymmetricKey = AesHelper.deriveKey(generateRandomString(32));
-    final symmetricKey = AesHelper.deriveKey(generateRandomString(32));
-
     List<Map<String, String>> messages = [];
     List<ConversationUser> conversationUsers = await getConversationUsers(conversation);
 
@@ -122,8 +103,6 @@ class Message {
       ConversationUser user = conversationUsers[i];
 
       if (profile.id == user.userId) {
-        id = user.id;
-
         messages.add({
           'id': messageId,
           'message_data_id': messageDataId,
@@ -150,20 +129,11 @@ class Message {
       });
     }
 
-    Map<String, String> messageData = {
-      'id': messageDataId,
-      'data': AesHelper.aesEncrypt(symmetricKey, Uint8List.fromList(data.codeUnits)),
-      'sender_id': AesHelper.aesEncrypt(symmetricKey, Uint8List.fromList(senderId.codeUnits)),
-      'symmetric_key': AesHelper.aesEncrypt(
-        userSymmetricKey,
-        Uint8List.fromList(base64.encode(symmetricKey).codeUnits),
-      ),
-    };
+    return messages;
+  }
 
-    return jsonEncode(<String, dynamic>{
-      'message_data': messageData,
-      'message': messages,
-    });
+  String getContent() {
+    return '';
   }
 
   Map<String, dynamic> toMap() {
@@ -171,7 +141,6 @@ class Message {
       'id': id,
       'symmetric_key': symmetricKey,
       'user_symmetric_key': userSymmetricKey,
-      'data': data,
       'sender_id': senderId,
       'sender_username': senderUsername,
       'association_key': associationKey,
@@ -179,19 +148,4 @@ class Message {
       'failed_to_send': failedToSend ? 1 : 0,
     };
   }
-
-  @override
-  String toString() {
-    return '''
-
-
-      id: $id
-      data: $data
-      senderId: $senderId
-      senderUsername: $senderUsername
-      associationKey: $associationKey
-      createdAt: $createdAt
-      ''';
-  }
-
 }

mobile/lib/models/my_profile.dart

@@ -1,6 +1,8 @@
 import 'dart:convert';
+import 'dart:io';
 
-import 'package:Envelope/components/select_message_ttl.dart';
+import 'package:Envelope/utils/storage/get_file.dart';
+import 'package:flutter/material.dart';
 import 'package:flutter_dotenv/flutter_dotenv.dart';
 import 'package:pointycastle/impl.dart';
 import 'package:shared_preferences/shared_preferences.dart';
@@ -17,7 +19,10 @@ class MyProfile {
   String? friendId;
   RSAPrivateKey? privateKey;
   RSAPublicKey? publicKey;
+  String? symmetricKey;
   DateTime? loggedInAt;
+  File? image;
+  String? imageLink;
   String messageExpiryDefault = 'no_expiry';
 
   MyProfile({
@@ -26,7 +31,10 @@ class MyProfile {
     this.friendId,
     this.privateKey,
     this.publicKey,
+    this.symmetricKey,
     this.loggedInAt,
+    this.image,
+    this.imageLink,
     required this.messageExpiryDefault,
   });
 
@@ -44,8 +52,11 @@ class MyProfile {
         username: json['username'],
         privateKey: privateKey,
         publicKey: publicKey,
+        symmetricKey: json['symmetric_key'],
         loggedInAt: loggedInAt,
-        messageExpiryDefault: json['message_expiry_default']
+        messageExpiryDefault: json['message_expiry_default'],
+        image: json['file'] != null ? File(json['file']) : null,
+        imageLink: json['image_link'],
     );
   }
 
@@ -57,7 +68,7 @@ class MyProfile {
       logged_in_at: $loggedInAt
       public_key: $publicKey
       private_key: $privateKey
-        ''';
+    ''';
   }
 
   String toJson() {
@@ -70,8 +81,11 @@ class MyProfile {
       'asymmetric_public_key': publicKey != null ?
           CryptoUtils.encodeRSAPublicKeyToPem(publicKey!) :
           null,
+      'symmetric_key': symmetricKey,
       'logged_in_at': loggedInAt?.toIso8601String(),
       'message_expiry_default': messageExpiryDefault,
+      'file': image?.path,
+      'image_link': imageLink,
     });
   }
 
@@ -80,7 +94,24 @@ class MyProfile {
         password,
         base64.decode(json['asymmetric_private_key'])
     );
+
+    json['symmetric_key'] = base64.encode(CryptoUtils.rsaDecrypt(
+      base64.decode(json['symmetric_key']),
+      CryptoUtils.rsaPrivateKeyFromPem(json['asymmetric_private_key']),
+    ));
+
+    if (json['image_link'] != '') {
+      File profileIcon = await getFile(
+        '$defaultServerUrl/files/${['image_link']}',
+        json['user_id'],
+        json['symmetric_key'],
+      );
+
+      json['file'] = profileIcon.path;
+    }
+
     MyProfile profile = MyProfile._fromJson(json);
+
     final preferences = await SharedPreferences.getInstance();
     preferences.setString('profile', profile.toJson());
     return profile;

mobile/lib/models/text_messages.dart

@@ -0,0 +1,135 @@
+import 'dart:convert';
+import 'dart:typed_data';
+
+import 'package:pointycastle/pointycastle.dart';
+import 'package:uuid/uuid.dart';
+
+import '/models/conversations.dart';
+import '/models/messages.dart';
+import '/utils/encryption/aes_helper.dart';
+import '/utils/encryption/crypto_utils.dart';
+import '/utils/strings.dart';
+
+class TextMessage extends Message {
+  String text;
+
+  TextMessage({
+    id,
+    symmetricKey,
+    userSymmetricKey,
+    senderId,
+    senderUsername,
+    associationKey,
+    createdAt,
+    failedToSend,
+    required this.text,
+  }) : super(
+    id: id,
+    symmetricKey: symmetricKey,
+    userSymmetricKey: userSymmetricKey,
+    senderId: senderId,
+    senderUsername: senderUsername,
+    associationKey: associationKey,
+    createdAt: createdAt,
+    failedToSend: failedToSend,
+  );
+
+  factory TextMessage.fromJson(Map<String, dynamic> json, RSAPrivateKey privKey) {
+    var userSymmetricKey = CryptoUtils.rsaDecrypt(
+      base64.decode(json['symmetric_key']),
+      privKey,
+    );
+
+    var symmetricKey = AesHelper.aesDecrypt(
+      userSymmetricKey,
+      base64.decode(json['message_data']['symmetric_key']),
+    );
+
+    var senderId = AesHelper.aesDecrypt(
+      base64.decode(symmetricKey),
+      base64.decode(json['message_data']['sender_id']),
+    );
+
+    var data = AesHelper.aesDecrypt(
+      base64.decode(symmetricKey),
+      base64.decode(json['message_data']['data']),
+    );
+
+    return TextMessage(
+      id: json['id'],
+      symmetricKey: symmetricKey,
+      userSymmetricKey: base64.encode(userSymmetricKey),
+      senderId: senderId,
+      senderUsername: 'Unknown',
+      associationKey: json['association_key'],
+      createdAt: json['created_at'],
+      failedToSend: false,
+      text: data,
+    );
+  }
+
+  @override
+  Map<String, dynamic> toMap() {
+    return {
+      'id': id,
+      'symmetric_key': symmetricKey,
+      'user_symmetric_key': userSymmetricKey,
+      'data': text,
+      'sender_id': senderId,
+      'sender_username': senderUsername,
+      'association_key': associationKey,
+      'created_at': createdAt,
+      'failed_to_send': failedToSend ? 1 : 0,
+    };
+  }
+
+  Future<Map<String, dynamic>> payloadJson(Conversation conversation) async {
+    final String messageDataId = (const Uuid()).v4();
+
+    final symmetricKey = AesHelper.deriveKey(generateRandomString(32));
+
+    final userSymmetricKey = AesHelper.deriveKey(generateRandomString(32));
+
+    List<Map<String, String>> messages = await super.payloadJsonBase(
+      symmetricKey,
+      userSymmetricKey,
+      conversation,
+      id,
+      messageDataId,
+    );
+
+    Map<String, String> messageData = {
+      'id': id,
+      'data': AesHelper.aesEncrypt(symmetricKey, Uint8List.fromList(text.codeUnits)),
+      'sender_id': AesHelper.aesEncrypt(symmetricKey, Uint8List.fromList(senderId.codeUnits)),
+      'symmetric_key': AesHelper.aesEncrypt(
+        userSymmetricKey,
+        Uint8List.fromList(base64.encode(symmetricKey).codeUnits),
+      ),
+    };
+
+    return <String, dynamic>{
+      'message_data': messageData,
+      'message': messages,
+    };
+  }
+
+  @override
+  String getContent() {
+    return text;
+  }
+
+  @override
+  String toString() {
+    return '''
+
+
+      id: $id
+      data: $text,
+      senderId: $senderId
+      senderUsername: $senderUsername
+      associationKey: $associationKey
+      createdAt: $createdAt
+      ''';
+  }
+}

mobile/lib/utils/encryption/aes_helper.dart

@@ -100,7 +100,7 @@ class AesHelper {
     return base64.encode(cipherIvBytes);
   }
 
-  static String aesDecrypt(dynamic password, Uint8List ciphertext,
+  static Uint8List aesDecryptBytes(dynamic password, Uint8List ciphertext,
       {String mode = cbcMode}) {
 
     Uint8List derivedKey;
@@ -136,7 +136,13 @@ class AesHelper {
     Uint8List paddedText = _processBlocks(cipher, cipherBytes);
     Uint8List textBytes = unpad(paddedText);
 
-    return String.fromCharCodes(textBytes);
+    return textBytes;
+  }
+
+  static String aesDecrypt(dynamic password, Uint8List ciphertext,
+      {String mode = cbcMode}) {
+
+    return String.fromCharCodes(aesDecryptBytes(password, ciphertext, mode: mode));
   }
 
   static Uint8List _processBlocks(BlockCipher cipher, Uint8List inp) {

mobile/lib/utils/storage/conversations.dart

@@ -1,6 +1,9 @@
 import 'dart:convert';
 
+import 'package:Envelope/exceptions/update_data_exception.dart';
+import 'package:Envelope/utils/storage/get_file.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_dotenv/flutter_dotenv.dart';
 import 'package:http/http.dart' as http;
 import 'package:pointycastle/export.dart';
 import 'package:sqflite/sqflite.dart';
@@ -13,12 +16,17 @@ import '/utils/encryption/aes_helper.dart';
 import '/utils/storage/database.dart';
 import '/utils/storage/session_cookie.dart';
 
-Future<void> updateConversation(Conversation conversation, { includeUsers = true } ) async {
+Future<void> updateConversation(
+  Conversation conversation,
+  {
+    includeUsers = false,
+    updatedImage = false,
+  } ) async {
   String sessionCookie = await getSessionCookie();
 
   Map<String, dynamic> conversationJson = await conversation.payloadJson(includeUsers: includeUsers);
 
-  var x = await http.put(
+  var resp = await http.put(
     await MyProfile.getServerUrl('api/v1/auth/conversations'),
     headers: <String, String>{
       'Content-Type': 'application/json; charset=UTF-8',
@@ -27,8 +35,28 @@ Future<void> updateConversation(Conversation conversation, { includeUsers = true
     body: jsonEncode(conversationJson),
   );
 
-  // TODO: Handle errors here
-  print(x.statusCode);
+  if (resp.statusCode != 204) {
+    throw UpdateDataException('Unable to update conversation, please try again later.');
+  }
+
+  if (!updatedImage) {
+    return;
+  }
+
+  Map<String, dynamic> attachmentJson = conversation.payloadImageJson();
+
+  resp = await http.post(
+    await MyProfile.getServerUrl('api/v1/auth/conversations/${conversation.id}/image'),
+    headers: <String, String>{
+      'Content-Type': 'application/json; charset=UTF-8',
+      'cookie': sessionCookie,
+    },
+    body: jsonEncode(attachmentJson),
+  );
+
+  if (resp.statusCode != 204) {
+    throw UpdateDataException('Unable to update conversation image, please try again later.');
+  }
 }
 
 // TODO: Refactor this function
@@ -116,6 +144,15 @@ Future<void> updateConversations() async {
         );
       }
 
+      // TODO: Handle exception here
+      if (conversationDetailJson['attachment_id'] != null) {
+        conversation.icon = await getFile(
+          '$defaultServerUrl/files/${conversationDetailJson['attachment']['image_link']}',
+          conversation.id,
+          conversation.symmetricKey,
+        );
+      }
+
       await db.insert(
         'conversations',
         conversation.toMap(),

mobile/lib/utils/storage/database.dart

@@ -39,7 +39,8 @@ Future<Database> getDatabaseConnection() async {
                                 name TEXT,
                                 two_user INTEGER,
                                 status INTEGER,
-                                is_read INTEGER
+                                is_read INTEGER,
+                                file TEXT
                         );
                         ''');
 
@@ -63,6 +64,7 @@ Future<Database> getDatabaseConnection() async {
                                 symmetric_key TEXT,
                                 user_symmetric_key TEXT,
                                 data TEXT,
+                                file TEXT,
                                 sender_id TEXT,
                                 sender_username TEXT,
                                 association_key TEXT,

mobile/lib/utils/storage/get_file.dart

@@ -0,0 +1,32 @@
+import 'dart:io';
+
+import 'package:http/http.dart' as http;
+
+import '/utils/encryption/aes_helper.dart';
+import '/utils/storage/session_cookie.dart';
+import '/utils/storage/write_file.dart';
+
+Future<File> getFile(String link, String imageName, dynamic symmetricKey) async {
+  var resp = await http.get(
+    Uri.parse(link),
+    headers: {
+      'cookie': await getSessionCookie(),
+    }
+  );
+
+  if (resp.statusCode != 200) {
+    throw Exception('Could not get attachment file');
+  }
+
+  var data = AesHelper.aesDecryptBytes(
+    symmetricKey,
+    resp.bodyBytes,
+  );
+
+  File file = await writeImage(
+    imageName,
+    data,
+  );
+
+  return file;
+}

mobile/lib/utils/storage/messages.dart

@@ -1,72 +1,121 @@
 import 'dart:convert';
+import 'dart:io';
 
+import 'package:Envelope/models/messages.dart';
+import 'package:Envelope/utils/storage/write_file.dart';
 import 'package:http/http.dart' as http;
 import 'package:sqflite/sqflite.dart';
 import 'package:uuid/uuid.dart';
 
+import '/models/image_message.dart';
+import '/models/text_messages.dart';
 import '/models/conversation_users.dart';
 import '/models/conversations.dart';
-import '/models/messages.dart';
 import '/models/my_profile.dart';
 import '/utils/storage/database.dart';
 import '/utils/storage/session_cookie.dart';
 
-Future<void> sendMessage(Conversation conversation, String data) async {
+Future<void> sendMessage(Conversation conversation, {
+  String? data,
+  List<File> files = const []
+}) async {
+
   MyProfile profile = await MyProfile.getProfile();
 
   var uuid = const Uuid();
-  final String messageId = uuid.v4();
 
   ConversationUser currentUser = await getConversationUser(conversation, profile.id);
 
-  Message message = Message(
-      id: messageId,
-      symmetricKey: '',
-      userSymmetricKey: '',
-      senderId: currentUser.userId,
-      senderUsername: profile.username,
-      data: data,
-      associationKey: currentUser.associationKey,
-      createdAt: DateTime.now().toIso8601String(),
-      failedToSend: false,
-  );
+  List<Message> messages = [];
+  List<Map<String, dynamic>> messagesToSend = [];
 
   final db = await getDatabaseConnection();
 
-  await db.insert(
-      'messages',
-      message.toMap(),
-      conflictAlgorithm: ConflictAlgorithm.replace,
-  );
+  if (data != null) {
+    TextMessage message = TextMessage(
+        id: uuid.v4(),
+        symmetricKey: '',
+        userSymmetricKey: '',
+        senderId: currentUser.userId,
+        senderUsername: profile.username,
+        associationKey: currentUser.associationKey,
+        createdAt: DateTime.now().toIso8601String(),
+        failedToSend: false,
+        text: data,
+    );
+
+    messages.add(message);
+    messagesToSend.add(await message.payloadJson(
+        conversation,
+    ));
+
+    await db.insert(
+        'messages',
+        message.toMap(),
+        conflictAlgorithm: ConflictAlgorithm.replace,
+    );
+  }
+
+  for (File file in files) {
+
+    String messageId = uuid.v4();
+
+    File writtenFile = await writeImage(
+      messageId,
+      file.readAsBytesSync(),
+    );
+
+    ImageMessage message = ImageMessage(
+        id: messageId,
+        symmetricKey: '',
+        userSymmetricKey: '',
+        senderId: currentUser.userId,
+        senderUsername: profile.username,
+        associationKey: currentUser.associationKey,
+        createdAt: DateTime.now().toIso8601String(),
+        failedToSend: false,
+        file: writtenFile,
+    );
+
+    messages.add(message);
+    messagesToSend.add(await message.payloadJson(
+        conversation,
+    ));
+
+    await db.insert(
+        'messages',
+        message.toMap(),
+        conflictAlgorithm: ConflictAlgorithm.replace,
+    );
+  }
 
   String sessionCookie = await getSessionCookie();
 
-  message.payloadJson(conversation, messageId)
-      .then((messageJson) async {
-        return http.post(
-            await MyProfile.getServerUrl('api/v1/auth/message'),
-            headers: <String, String>{
-              'Content-Type': 'application/json; charset=UTF-8',
-              'cookie': sessionCookie,
-            },
-            body: messageJson,
-        );
-      })
-      .then((resp) {
-        if (resp.statusCode != 200) {
-          throw Exception('Unable to send message');
-        }
-      })
-      .catchError((exception) {
-        message.failedToSend = true;
-        db.update(
-            'messages',
-            message.toMap(),
-            where: 'id = ?',
-            whereArgs: [message.id],
-        );
-        throw exception;
-      });
+  return http.post(
+    await MyProfile.getServerUrl('api/v1/auth/message'),
+    headers: <String, String>{
+      'Content-Type': 'application/json; charset=UTF-8',
+      'cookie': sessionCookie,
+    },
+    body: jsonEncode(messagesToSend),
+  )
+  .then((resp) {
+    if (resp.statusCode != 200) {
+      throw Exception('Unable to send message');
+    }
+  })
+  .catchError((exception) {
+    for (Message message in messages) {
+      message.failedToSend = true;
+      db.update(
+        'messages',
+        message.toMap(),
+        where: 'id = ?',
+        whereArgs: [message.id],
+      );
+    }
+    throw exception;
+  });
 }
 
 Future<void> updateMessageThread(Conversation conversation, {MyProfile? profile}) async {
@@ -89,10 +138,17 @@ Future<void> updateMessageThread(Conversation conversation, {MyProfile? profile}
   final db = await getDatabaseConnection();
 
   for (var i = 0; i < messageThreadJson.length; i++) {
-    Message message = Message.fromJson(
-        messageThreadJson[i] as Map<String, dynamic>,
+    var messageJson = messageThreadJson[i] as Map<String, dynamic>;
+
+    var message =  messageJson['message_data']['attachment_id'] != null ?
+      await ImageMessage.fromJson(
+        messageJson,
         profile.privateKey!,
-    );
+      ) :
+      TextMessage.fromJson(
+        messageJson,
+        profile.privateKey!,
+      );
 
     ConversationUser messageUser = await getConversationUser(conversation, message.senderId);
     message.senderUsername = messageUser.username;

mobile/lib/utils/storage/write_file.dart

@@ -0,0 +1,26 @@
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:path_provider/path_provider.dart';
+
+Future<String> get _localPath async {
+  final directory = await getApplicationDocumentsDirectory();
+
+  return directory.path;
+}
+
+Future<File> _localFile(String fileName) async {
+  final path = await _localPath;
+  return File('$path/$fileName');
+}
+
+Future<File> writeImage(String fileName, Uint8List data) async {
+  final file = await _localFile(fileName);
+
+  // Write the file
+  return file.writeAsBytes(data);
+}
+
+String getExtension(String fileName) {
+  return  fileName.split('.').last;
+}

mobile/lib/views/authentication/login.dart

@@ -8,30 +8,30 @@ import '/models/my_profile.dart';
 import '/utils/storage/session_cookie.dart';
 
 class LoginResponse {
-  final String status;
-  final String message;
-  final String publicKey;
-  final String privateKey;
   final String userId;
   final String username;
+  final String publicKey;
+  final String privateKey;
+  final String symmetricKey;
+  final String? imageLink;
 
   const LoginResponse({
-    required this.status,
-    required this.message,
     required this.publicKey,
     required this.privateKey,
+    required this.symmetricKey,
     required this.userId,
     required this.username,
+    this.imageLink,
   });
 
   factory LoginResponse.fromJson(Map<String, dynamic> json) {
     return LoginResponse(
-      status: json['status'],
-      message: json['message'],
-      publicKey: json['asymmetric_public_key'],
-      privateKey: json['asymmetric_private_key'],
       userId: json['user_id'],
       username: json['username'],
+      publicKey: json['asymmetric_public_key'],
+      privateKey: json['asymmetric_private_key'],
+      symmetricKey: json['symmetric_key'],
+      imageLink: json['image_link'],
     );
   }
 }
@@ -175,6 +175,7 @@ class _LoginWidgetState extends State<LoginWidget> {
                               ModalRoute.withName('/home'),
                             );
                         }).catchError((error) {
+                          print(error);
                           showMessage(
                             'Could not login to Envelope, please try again later.',
                             context,

mobile/lib/views/main/conversation/create_add_users_list.dart

@@ -40,7 +40,6 @@ class _ConversationAddFriendItemState extends State<ConversationAddFriendItem> {
                          children: <Widget>[
                            CustomCircleAvatar(
                                initials: widget.friend.username[0].toUpperCase(),
-                               imagePath: null,
                            ),
                            const SizedBox(width: 16),
                            Expanded(

mobile/lib/views/main/conversation/detail.dart

@@ -1,11 +1,15 @@
-import 'package:Envelope/components/custom_title_bar.dart';
+import 'dart:io';
+
+import 'package:Envelope/views/main/conversation/message.dart';
 import 'package:flutter/material.dart';
+import 'package:image_picker/image_picker.dart';
 
+import '/components/custom_title_bar.dart';
+import '/components/file_picker.dart';
 import '/models/conversations.dart';
 import '/models/messages.dart';
 import '/models/my_profile.dart';
 import '/utils/storage/messages.dart';
-import '/utils/time.dart';
 import '/views/main/conversation/settings.dart';
 
 class ConversationDetail extends StatefulWidget{
@@ -17,7 +21,6 @@ class ConversationDetail extends StatefulWidget{
 
   @override
   _ConversationDetailState createState() => _ConversationDetailState();
-
 }
 
 class _ConversationDetailState extends State<ConversationDetail> {
@@ -30,6 +33,9 @@ class _ConversationDetailState extends State<ConversationDetail> {
 
   TextEditingController msgController = TextEditingController();
 
+  bool showFilePicker = false;
+  List<File> selectedImages = [];
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -44,97 +50,24 @@ class _ConversationDetailState extends State<ConversationDetail> {
         ),
         showBack: true,
         rightHandButton: IconButton(
-                  onPressed: (){
-                    Navigator.of(context).push(
-                      MaterialPageRoute(builder: (context) => ConversationSettings(
-                          conversation: widget.conversation
-                      )),
-                    );
-                  },
-                  icon: Icon(
-                    Icons.settings,
-                    color: Theme.of(context).appBarTheme.iconTheme?.color,
-                  ),
-                ),
+          onPressed: (){
+            Navigator.of(context).push(
+              MaterialPageRoute(builder: (context) => ConversationSettings(
+                  conversation: widget.conversation
+              )),
+            );
+          },
+          icon: Icon(
+            Icons.settings,
+            color: Theme.of(context).appBarTheme.iconTheme?.color,
+          ),
+        ),
       ),
 
       body: Stack(
         children: <Widget>[
           messagesView(),
-          Align(
-            alignment: Alignment.bottomLeft,
-            child: ConstrainedBox(
-              constraints: const BoxConstraints(
-                maxHeight: 200.0,
-              ),
-              child: Container(
-                padding: const EdgeInsets.only(left: 10,bottom: 10,top: 10),
-                // height: 60,
-                width: double.infinity,
-                color: Theme.of(context).backgroundColor,
-                child: Row(
-                  children: <Widget>[
-                    GestureDetector(
-                      onTap: (){
-                      },
-                      child: Container(
-                        height: 30,
-                        width: 30,
-                        decoration: BoxDecoration(
-                          color: Theme.of(context).primaryColor,
-                          borderRadius: BorderRadius.circular(30),
-                        ),
-                        child: Icon(
-  Icons.add,
-                          color: Theme.of(context).colorScheme.onPrimary,
-                          size: 20
-                        ),
-                      ),
-                    ),
-                    const SizedBox(width: 15,),
-                    Expanded(
-                      child: TextField(
-                        decoration: InputDecoration(
-                          hintText: 'Write message...',
-                          hintStyle: TextStyle(
-                            color: Theme.of(context).hintColor,
-                          ),
-                          border: InputBorder.none,
-                        ),
-                        maxLines: null,
-                        controller: msgController,
-                      ),
-                    ),
-                    const SizedBox(width: 15),
-                    Container(
-                      width: 45,
-                      height: 45,
-                      child: FittedBox(
-                        child: FloatingActionButton(
-                          onPressed: () async {
-                            if (msgController.text == '') {
-                              return;
-                            }
-                            await sendMessage(widget.conversation, msgController.text);
-                            messages = await getMessagesForThread(widget.conversation);
-                            setState(() {});
-                            msgController.text = '';
-                          },
-                          child: Icon(
-                            Icons.send,
-                            color: Theme.of(context).colorScheme.onPrimary,
-                            size: 22
-                          ),
-                          backgroundColor: Theme.of(context).primaryColor,
-                        ),
-                      ),
-                    ),
-                    const SizedBox(width: 10),
-                  ],
-                ),
-              ),
-            ),
-          ),
+          newMessageContent(),
         ],
       ),
     );
@@ -152,38 +85,6 @@ class _ConversationDetailState extends State<ConversationDetail> {
     fetchMessages();
   }
 
-  Widget usernameOrFailedToSend(int index) {
-    if (messages[index].senderUsername != profile.username) {
-      return Text(
-        messages[index].senderUsername,
-        style: TextStyle(
-          fontSize: 12,
-          color: Colors.grey[300],
-        ),
-      );
-    }
-
-    if (messages[index].failedToSend) {
-      return Row(
-        mainAxisAlignment: MainAxisAlignment.end,
-        children: const <Widget>[
-          Icon(
-            Icons.warning_rounded,
-            color: Colors.red,
-            size: 20,
-          ),
-          Text(
-            'Failed to send',
-            style: TextStyle(color: Colors.red, fontSize: 12),
-            textAlign: TextAlign.right,
-          ),
-        ],
-      );
-    }
-
-    return const SizedBox.shrink();
-  }
-
   Widget messagesView() {
     if (messages.isEmpty) {
       return const Center(
@@ -194,79 +95,200 @@ class _ConversationDetailState extends State<ConversationDetail> {
     return ListView.builder(
       itemCount: messages.length,
       shrinkWrap: true,
-      padding: const EdgeInsets.only(top: 10,bottom: 90),
+      padding: EdgeInsets.only(
+        top: 10,
+        bottom: selectedImages.isEmpty ? 90 : 160,
+      ),
       reverse: true,
       itemBuilder: (context, index) {
-        return Container(
-          padding: const EdgeInsets.only(left: 14,right: 14,top: 0,bottom: 0),
-          child: Align(
-            alignment: (
-            messages[index].senderUsername == profile.username ?
-            Alignment.topRight :
-            Alignment.topLeft
-          ),
-            child: Column(
-              crossAxisAlignment: messages[index].senderUsername == profile.username ?
-              CrossAxisAlignment.end :
-              CrossAxisAlignment.start,
-              children: <Widget>[
-                Container(
-                  decoration: BoxDecoration(
-                    borderRadius: BorderRadius.circular(20),
-                    color: (
-                    messages[index].senderUsername == profile.username ?
-                    Theme.of(context).colorScheme.primary :
-                    Theme.of(context).colorScheme.tertiary
-                  ),
+        return ConversationMessage(
+          message: messages[index],
+          profile: profile,
+          index: index,
+        );
+      },
+    );
+  }
+
+  Widget showSelectedImages() {
+    if (selectedImages.isEmpty) {
+      return const SizedBox.shrink();
+    }
+
+    return SizedBox(
+      height: 80,
+      width: double.infinity,
+        child: ListView.builder(
+        itemCount: selectedImages.length,
+        shrinkWrap: true,
+        scrollDirection: Axis.horizontal,
+        padding: const EdgeInsets.all(5),
+        itemBuilder: (context, i) {
+
+          return Stack(
+            children: [
+              Column(
+                children: [
+                  const SizedBox(height: 5),
+                  Container(
+                    alignment: Alignment.center,
+                    height: 65,
+                    width: 65,
+                    child: Image.file(
+                      selectedImages[i],
+                      fit: BoxFit.fill,
+                    ),
                   ),
-                  padding: const EdgeInsets.all(12),
-                  child: Text(
-                    messages[index].data,
-                    style: TextStyle(
-                      fontSize: 15,
-                      color: messages[index].senderUsername == profile.username ?
-                      Theme.of(context).colorScheme.onPrimary :
-                      Theme.of(context).colorScheme.onTertiary,
-                    )
+                ],
+              ),
+
+              SizedBox(
+                height: 60,
+                width: 70,
+                child: Align(
+                  alignment: Alignment.topRight,
+                  child: GestureDetector(
+                    onTap: () {
+                      setState(() {
+                        selectedImages.removeAt(i);
+                      });
+                    },
+                    child: Container(
+                      height: 20,
+                      width: 20,
+                      decoration: BoxDecoration(
+                        color: Theme.of(context).colorScheme.onPrimary,
+                        borderRadius: BorderRadius.circular(30),
+                      ),
+                      child: Icon(
+                        Icons.cancel,
+                        color: Theme.of(context).primaryColor,
+                        size: 20
+                      ),
+                    ),
                   ),
                 ),
-                const SizedBox(height: 1.5),
-                Row(
-                  mainAxisAlignment: messages[index].senderUsername == profile.username ?
-                  MainAxisAlignment.end :
-                  MainAxisAlignment.start,
-                  children: <Widget>[
-                    const SizedBox(width: 10),
-                    usernameOrFailedToSend(index),
-                  ],
+              ),
+
+            ],
+          );
+        },
+      )
+    );
+  }
+
+  Widget newMessageContent() {
+    return Align(
+    alignment: Alignment.bottomLeft,
+    child: ConstrainedBox(
+      constraints: BoxConstraints(
+        maxHeight: selectedImages.isEmpty ?
+          200.0 :
+          270.0,
+      ),
+      child: Container(
+        padding: const EdgeInsets.only(left: 10,bottom: 10,top: 10),
+        width: double.infinity,
+        color: Theme.of(context).backgroundColor,
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+
+            showSelectedImages(),
+
+            Row(
+              children: <Widget>[
+
+                GestureDetector(
+                  onTap: (){
+                    setState(() {
+                      showFilePicker = !showFilePicker;
+                    });
+                  },
+                  child: Container(
+                    height: 30,
+                    width: 30,
+                    decoration: BoxDecoration(
+                      color: Theme.of(context).primaryColor,
+                      borderRadius: BorderRadius.circular(30),
+                    ),
+                    child: Icon(
+                      Icons.add,
+                      color: Theme.of(context).colorScheme.onPrimary,
+                      size: 20
+                    ),
+                  ),
                 ),
-                const SizedBox(height: 1.5),
-                Row(
-                  mainAxisAlignment: messages[index].senderUsername == profile.username ?
-                  MainAxisAlignment.end :
-                  MainAxisAlignment.start,
-                  children: <Widget>[
-                    const SizedBox(width: 10),
-                    Text(
-                      convertToAgo(messages[index].createdAt),
-                      textAlign: messages[index].senderUsername == profile.username ?
-                      TextAlign.left :
-                      TextAlign.right,
-                      style: TextStyle(
-                        fontSize: 12,
-                        color: Colors.grey[500],
+
+                const SizedBox(width: 15,),
+
+                Expanded(
+                  child: TextField(
+                    decoration: InputDecoration(
+                      hintText: 'Write message...',
+                      hintStyle: TextStyle(
+                        color: Theme.of(context).hintColor,
                       ),
+                      border: InputBorder.none,
                     ),
-                  ],
+                    maxLines: null,
+                    controller: msgController,
+                  ),
                 ),
-                index != 0 ?
-                const SizedBox(height: 20) :
-                const SizedBox.shrink(),
-              ],
-            )
+
+                const SizedBox(width: 15),
+
+                SizedBox(
+                  width: 45,
+                  height: 45,
+                    child: FittedBox(
+                      child: FloatingActionButton(
+                        onPressed: () async {
+                          if (msgController.text == '' && selectedImages.isEmpty) {
+                            return;
+                          }
+                          await sendMessage(
+                            widget.conversation,
+                            data: msgController.text != '' ? msgController.text : null,
+                            files: selectedImages,
+                          );
+                          messages = await getMessagesForThread(widget.conversation);
+                          setState(() {
+                            msgController.text = '';
+                            selectedImages = [];
+                          });
+                        },
+                        child: Icon(
+                          Icons.send,
+                          color: Theme.of(context).colorScheme.onPrimary,
+                          size: 22
+                        ),
+                        backgroundColor: Theme.of(context).primaryColor,
+                      ),
+                    ),
+                  ),
+                  const SizedBox(width: 10),
+                ],
+              ),
+
+              showFilePicker ?
+                  FilePicker(
+                    cameraHandle: (XFile image) {},
+                    galleryHandleMultiple: (List<XFile> images) async {
+                      for (var img in images) {
+                        selectedImages.add(File(img.path));
+                      }
+                      setState(() {
+                        showFilePicker = false;
+                      });
+                    },
+                    fileHandle: () {},
+                  ) :
+                  const SizedBox.shrink(),
+            ],
           ),
-        );
-      },
+        ),
+      ),
     );
   }
 }

mobile/lib/views/main/conversation/edit_details.dart

@@ -1,10 +1,14 @@
+import 'dart:io';
+
+import 'package:Envelope/components/file_picker.dart';
 import 'package:flutter/material.dart';
+import 'package:image_picker/image_picker.dart';
 
 import '/components/custom_circle_avatar.dart';
 import '/models/conversations.dart';
 
 class ConversationEditDetails extends StatefulWidget {
-  final Function(String conversationName) saveCallback;
+  final Function(String conversationName, File? conversationIcon) saveCallback;
   final Conversation? conversation;
   const ConversationEditDetails({
     Key? key,
@@ -22,11 +26,15 @@ class _ConversationEditDetails extends State<ConversationEditDetails> {
   List<Conversation> conversations = [];
 
   TextEditingController conversationNameController = TextEditingController();
+  File? conversationIcon;
+
+  bool showFileSelector = false;
 
   @override
   void initState() {
     if (widget.conversation != null) {
       conversationNameController.text = widget.conversation!.name;
+      conversationIcon = widget.conversation!.icon;
     }
     super.initState();
   }
@@ -54,94 +62,128 @@ class _ConversationEditDetails extends State<ConversationEditDetails> {
     );
 
     return Scaffold(
-        appBar: AppBar(
-            elevation: 0,
-            automaticallyImplyLeading: false,
-            flexibleSpace: SafeArea(
-                child: Container(
-                    padding: const EdgeInsets.only(right: 16),
-                    child: Row(
-                        children: <Widget>[
-                          IconButton(
-                              onPressed: (){
-                                Navigator.pop(context);
-                              },
-                              icon: const Icon(Icons.arrow_back),
-                          ),
-                          const SizedBox(width: 2,),
-                          Expanded(
-                              child: Column(
-                                  crossAxisAlignment: CrossAxisAlignment.start,
-                                  mainAxisAlignment: MainAxisAlignment.center,
-                                  children: <Widget>[
-                                    Text(
-                                        widget.conversation != null ?
-                                        widget.conversation!.name + " Settings" :
-                                        'Add Conversation',
-                                        style: const TextStyle(
-                                            fontSize: 16,
-                                            fontWeight: FontWeight.w600
-                                        ),
-                                    ),
-                                  ],
-                              ),
-                          ),
-                        ],
-                    ),
+      appBar: AppBar(
+        elevation: 0,
+        automaticallyImplyLeading: false,
+        flexibleSpace: SafeArea(
+          child: Container(
+            padding: const EdgeInsets.only(right: 16),
+            child: Row(
+              children: <Widget>[
+                IconButton(
+                  onPressed: (){
+                    Navigator.pop(context);
+                  },
+                  icon: const Icon(Icons.arrow_back),
+                ),
+                const SizedBox(width: 2,),
+                Expanded(
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    children: <Widget>[
+                      Text(
+                        widget.conversation != null ?
+                        widget.conversation!.name + ' Settings' :
+                        'Add Conversation',
+                        style: const TextStyle(
+                            fontSize: 16,
+                            fontWeight: FontWeight.w600
+                        ),
+                      ),
+                    ],
+                  ),
                 ),
+              ],
+            ),
           ),
         ),
-        body: Center(
-            child: Padding(
-                padding: const EdgeInsets.only(
-                    top: 50,
-                    left: 25,
-                    right: 25,
+      ),
+
+      body: Center(
+        child: Padding(
+          padding: const EdgeInsets.only(
+              top: 50,
+              left: 25,
+              right: 25,
+          ),
+          child: Form(
+            key: _formKey,
+            child: Column(
+              children: [
+
+                CustomCircleAvatar(
+                  icon: const Icon(Icons.people, size: 60),
+                  image: conversationIcon,
+                  radius: 50,
+                  editImageCallback: () {
+                    setState(() {
+                      showFileSelector = true;
+                    });
+                  },
                 ),
-                child: Form(
-                    key: _formKey,
-                    child: Column(
-                        children: [
-                          const CustomCircleAvatar(
-                              icon: const Icon(Icons.people, size: 60),
-                              imagePath: null,
-                              radius: 50,
-                          ),
-                          const SizedBox(height: 30),
-                          TextFormField(
-                              controller: conversationNameController,
-                              textAlign: TextAlign.center,
-                              decoration: InputDecoration(
-                                  hintText: 'Title',
-                                  enabledBorder: inputBorderStyle,
-                                  focusedBorder: inputBorderStyle,
-                              ),
-                              style: inputTextStyle,
-                              // The validator receives the text that the user has entered.
-                              validator: (value) {
-                                if (value == null || value.isEmpty) {
-                                  return 'Add a title';
-                                }
-                                return null;
-                              },
-                          ),
-                          const SizedBox(height: 30),
-                          ElevatedButton(
-                              style: buttonStyle,
-                              onPressed: () {
-                                if (!_formKey.currentState!.validate()) {
-                                  // TODO: Show error here
-                                  return;
-                                }
-
-                                widget.saveCallback(conversationNameController.text);
-                              },
-                              child: const Text('Save'),
-                          ),
-                      ],
+
+                const SizedBox(height: 20),
+
+                showFileSelector ?
+                  Padding(
+                    padding: const EdgeInsets.only(bottom: 10),
+                    child: FilePicker(
+                      cameraHandle: (XFile image) {
+                        setState(() {
+                          conversationIcon = File(image.path);
+                          showFileSelector = false;
+                        });
+                      },
+                      galleryHandleSingle: (XFile image) async {
+                        setState(() {
+                          conversationIcon = File(image.path);
+                          showFileSelector = false;
+                        });
+                      },
+                    ),
+                  ) :
+                  const SizedBox(height: 10),
+
+                TextFormField(
+                  controller: conversationNameController,
+                  textAlign: TextAlign.center,
+                  decoration: InputDecoration(
+                    hintText: 'Title',
+                    enabledBorder: inputBorderStyle,
+                    focusedBorder: inputBorderStyle,
                   ),
-              ),
+                  style: inputTextStyle,
+                  // The validator receives the text that the user has entered.
+                  validator: (value) {
+                    if (value == null || value.isEmpty) {
+                      return 'Add a title';
+                    }
+                    return null;
+                  },
+                ),
+
+                const SizedBox(height: 30),
+
+                ElevatedButton(
+                  style: buttonStyle,
+                  onPressed: () {
+                    if (!_formKey.currentState!.validate()) {
+                      return;
+                    }
+
+                    widget.saveCallback(
+                      conversationNameController.text,
+                      conversationIcon,
+                    );
+                  },
+                  child: const Text('Save'),
+                ),
+
+              ],
+            ),
           ),
+        ),
       ),
     );
   }

mobile/lib/views/main/conversation/list.dart

@@ -1,3 +1,5 @@
+import 'dart:io';
+
 import 'package:Envelope/components/custom_title_bar.dart';
 import 'package:Envelope/models/friends.dart';
 import 'package:Envelope/utils/storage/conversations.dart';
@@ -61,35 +63,35 @@ class _ConversationListState extends State<ConversationList> {
       ),
     ),
     floatingActionButton: Padding(
-        padding: const EdgeInsets.only(right: 10, bottom: 10),
-        child: FloatingActionButton(
-          onPressed: () {
-            Navigator.of(context).push(
-                MaterialPageRoute(builder: (context) => ConversationEditDetails(
-                        saveCallback: (String conversationName) {
-                          Navigator.of(context).push(
-                            MaterialPageRoute(builder: (context) => ConversationAddFriendsList(
-                                friends: friends,
-                                saveCallback: (List<Friend> friendsSelected) async {
-                                  Conversation conversation = await createConversation(
-                                    conversationName,
-                                    friendsSelected,
-                                    false,
-                                  );
+      padding: const EdgeInsets.only(right: 10, bottom: 10),
+      child: FloatingActionButton(
+        onPressed: () {
+          Navigator.of(context).push(
+            MaterialPageRoute(builder: (context) => ConversationEditDetails(
+              saveCallback: (String conversationName, File? file) {
+                Navigator.of(context).push(
+                  MaterialPageRoute(builder: (context) => ConversationAddFriendsList(
+                    friends: friends,
+                    saveCallback: (List<Friend> friendsSelected) async {
+                      Conversation conversation = await createConversation(
+                        conversationName,
+                        friendsSelected,
+                        false,
+                      );
 
-                                  uploadConversation(conversation, context);
+                      uploadConversation(conversation, context);
 
-                                  Navigator.of(context).popUntil((route) => route.isFirst);
-                                  Navigator.push(context, MaterialPageRoute(builder: (context){
-                                    return ConversationDetail(
-                                      conversation: conversation,
-                                    );
-                                  }));
-                                },
-                            ))
-                          );
-                        },
-                )),
+                      Navigator.of(context).popUntil((route) => route.isFirst);
+                      Navigator.push(context, MaterialPageRoute(builder: (context){
+                        return ConversationDetail(
+                          conversation: conversation,
+                        );
+                      }));
+                    },
+                  ))
+                );
+              },
+              )),
             ).then(onGoBack);
           },
           backgroundColor: Theme.of(context).colorScheme.primary,

mobile/lib/views/main/conversation/list_item.dart

@@ -43,7 +43,7 @@ class _ConversationListItemState extends State<ConversationListItem> {
                  children: <Widget>[
                    CustomCircleAvatar(
                      initials: widget.conversation.name[0].toUpperCase(),
-                     imagePath: null,
+                     image: widget.conversation.icon,
                    ),
                    const SizedBox(width: 16),
                    Expanded(
@@ -59,21 +59,20 @@ class _ConversationListItemState extends State<ConversationListItem> {
                                style: const TextStyle(fontSize: 16)
                              ),
                              recentMessage != null ?
-                             const SizedBox(height: 2) :
-                             const SizedBox.shrink()
-                             ,
+                               const SizedBox(height: 2) :
+                               const SizedBox.shrink(),
                              recentMessage != null ?
-                             Text(
-                               recentMessage!.data,
-                               overflow: TextOverflow.ellipsis,
-                               maxLines: 1,
-                               style: TextStyle(
-                                 fontSize: 13,
-                                 color: Colors.grey.shade600,
-                                 fontWeight: conversation.isRead ? FontWeight.normal : FontWeight.bold,
-                               ),
-                             ) :
-                             const SizedBox.shrink(),
+                               Text(
+                                 recentMessage!.getContent(),
+                                 overflow: TextOverflow.ellipsis,
+                                 maxLines: 1,
+                                 style: TextStyle(
+                                   fontSize: 13,
+                                   color: Colors.grey.shade600,
+                                   fontWeight: conversation.isRead ? FontWeight.normal : FontWeight.bold,
+                                 ),
+                               ) :
+                               const SizedBox.shrink(),
                          ],
                         ),
                       ),

mobile/lib/views/main/conversation/message.dart

@@ -0,0 +1,241 @@
+import 'package:Envelope/components/view_image.dart';
+import 'package:Envelope/models/image_message.dart';
+import 'package:Envelope/models/my_profile.dart';
+import 'package:Envelope/utils/time.dart';
+import 'package:flutter/material.dart';
+
+import '/models/messages.dart';
+
+@immutable
+class ConversationMessage extends StatefulWidget {
+  const ConversationMessage({
+    Key? key,
+    required this.message,
+    required this.profile,
+    required this.index,
+  }) : super(key: key);
+
+  final Message message;
+  final MyProfile profile;
+  final int index;
+
+  @override
+  _ConversationMessageState createState() => _ConversationMessageState();
+}
+
+class _ConversationMessageState extends State<ConversationMessage> {
+
+  List<PopupMenuEntry<String>> menuItems = [];
+
+  Offset? _tapPosition;
+
+  bool showDownloadButton = false;
+  bool showDeleteButton = false;
+
+  @override
+  void initState() {
+    super.initState();
+
+    showDownloadButton = widget.message.runtimeType == ImageMessage;
+    showDeleteButton = widget.message.senderId == widget.profile.id;
+
+    if (showDownloadButton) {
+      menuItems.add(PopupMenuItem(
+        value: 'download',
+        child: Row(
+          children: const [
+            Icon(Icons.download),
+            SizedBox(
+              width: 10,
+            ),
+            Text('Download')
+          ],
+        ),
+      ));
+    }
+
+    if (showDeleteButton) {
+      menuItems.add(PopupMenuItem(
+        value: 'delete',
+        child: Row(
+          children: const [
+            Icon(Icons.delete),
+            SizedBox(
+              width: 10,
+            ),
+            Text('Delete')
+          ],
+        ),
+      ));
+    }
+
+    setState(() {});
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      padding: const EdgeInsets.only(left: 14,right: 14,top: 0,bottom: 0),
+      child: Align(
+        alignment: (
+        widget.message.senderId == widget.profile.id ?
+          Alignment.topRight :
+          Alignment.topLeft
+      ),
+        child: Column(
+          crossAxisAlignment: widget.message.senderId == widget.profile.id ?
+            CrossAxisAlignment.end :
+            CrossAxisAlignment.start,
+          children: <Widget>[
+
+            messageContent(context),
+
+            const SizedBox(height: 1.5),
+
+            Row(
+              mainAxisAlignment: widget.message.senderId == widget.profile.id ?
+                MainAxisAlignment.end :
+                MainAxisAlignment.start,
+              children: <Widget>[
+                const SizedBox(width: 10),
+                usernameOrFailedToSend(),
+              ],
+            ),
+
+            const SizedBox(height: 1.5),
+
+            Row(
+              mainAxisAlignment: widget.message.senderId == widget.profile.id ?
+                MainAxisAlignment.end :
+                MainAxisAlignment.start,
+              children: <Widget>[
+                const SizedBox(width: 10),
+                Text(
+                  convertToAgo(widget.message.createdAt),
+                  textAlign: widget.message.senderId == widget.profile.id ?
+                    TextAlign.left :
+                    TextAlign.right,
+                  style: TextStyle(
+                    fontSize: 12,
+                    color: Colors.grey[500],
+                  ),
+                ),
+              ],
+            ),
+
+            widget.index != 0 ?
+              const SizedBox(height: 20) :
+              const SizedBox.shrink(),
+          ],
+        )
+      ),
+    );
+  }
+
+  void _showCustomMenu() {
+    final Size overlay = MediaQuery.of(context).size;
+
+    int addVerticalOffset = 75 * menuItems.length;
+
+    // TODO: Implement download & delete methods
+    showMenu(
+      context: context,
+      items: menuItems,
+      position: RelativeRect.fromRect(
+          Offset(_tapPosition!.dx, (_tapPosition!.dy - addVerticalOffset)) & const Size(40, 40),
+          Offset.zero & overlay
+      )
+    )
+    .then<void>((String? delta) async {
+      if (delta == null) {
+        return;
+      }
+    });
+  }
+
+  void _storePosition(TapDownDetails details) {
+    _tapPosition = details.globalPosition;
+  }
+
+  Widget messageContent(BuildContext context) {
+    if (widget.message.runtimeType == ImageMessage) {
+      return GestureDetector(
+        onTap: () {
+          Navigator.push(context, MaterialPageRoute(builder: (context) {
+            return ViewImage(
+              message: (widget.message as ImageMessage)
+            );
+          }));
+        },
+        onLongPress: _showCustomMenu,
+        onTapDown: _storePosition,
+        child: ConstrainedBox(
+          constraints: const BoxConstraints(maxHeight: 350, maxWidth: 250),
+          child: ClipRRect(
+            borderRadius: BorderRadius.circular(20), child: Image.file(
+              (widget.message as ImageMessage).file,
+              fit: BoxFit.fill,
+            ),
+          ),
+        ),
+      );
+    }
+
+    return GestureDetector(
+      onLongPress: _showCustomMenu,
+      onTapDown: _storePosition,
+      child: Container(
+        decoration: BoxDecoration(
+          borderRadius: BorderRadius.circular(20),
+          color: (
+            widget.message.senderId == widget.profile.id ?
+              Theme.of(context).colorScheme.primary :
+              Theme.of(context).colorScheme.tertiary
+          ),
+        ),
+        padding: const EdgeInsets.all(12),
+        child: Text(
+          widget.message.getContent(),
+          style: TextStyle(
+            fontSize: 15,
+            color: widget.message.senderId == widget.profile.id ?
+              Theme.of(context).colorScheme.onPrimary :
+              Theme.of(context).colorScheme.onTertiary,
+          ),
+        ),
+      ),
+    );
+  }
+
+  Widget usernameOrFailedToSend() {
+    if (widget.message.senderId != widget.profile.id) {
+      return Text(
+        widget.message.senderUsername,
+        style: TextStyle(
+          fontSize: 12,
+          color: Colors.grey[300],
+        ),
+      );
+    }
+
+    if (widget.message.failedToSend) {
+      return Row(
+        mainAxisAlignment: MainAxisAlignment.end,
+        children: const <Widget>[
+          Icon(
+            Icons.warning_rounded,
+            color: Colors.red,
+            size: 20,
+          ),
+          Text(
+            'Failed to send',
+            style: TextStyle(color: Colors.red, fontSize: 12),
+            textAlign: TextAlign.right,
+          ),
+        ],
+      );
+    }
+
+    return const SizedBox.shrink();
+  }
+}

mobile/lib/views/main/conversation/settings.dart

@@ -1,6 +1,11 @@
+import 'dart:io';
+
 import 'package:Envelope/components/custom_title_bar.dart';
+import 'package:Envelope/components/flash_message.dart';
+import 'package:Envelope/exceptions/update_data_exception.dart';
 import 'package:Envelope/models/friends.dart';
 import 'package:Envelope/utils/encryption/crypto_utils.dart';
+import 'package:Envelope/utils/storage/write_file.dart';
 import 'package:Envelope/views/main/conversation/create_add_users.dart';
 import 'package:flutter/material.dart';
 
@@ -75,12 +80,15 @@ class _ConversationSettingsState extends State<ConversationSettings> {
   Widget conversationName() {
     return Row(
       children: <Widget> [
-        const CustomCircleAvatar(
-          icon: Icon(Icons.people, size: 40),
-          imagePath: null, // TODO: Add image here
+
+        CustomCircleAvatar(
+          icon: const Icon(Icons.people, size: 40),
           radius: 30,
+          image: widget.conversation.icon,
         ),
+
         const SizedBox(width: 10),
+
         Text(
           widget.conversation.name,
           style: const TextStyle(
@@ -88,6 +96,7 @@ class _ConversationSettingsState extends State<ConversationSettings> {
             fontWeight: FontWeight.w500,
           ),
         ),
+
         widget.conversation.admin && !widget.conversation.twoUser ? IconButton(
           iconSize: 20,
           icon: const Icon(Icons.edit),
@@ -96,8 +105,22 @@ class _ConversationSettingsState extends State<ConversationSettings> {
           onPressed: () {
             Navigator.of(context).push(
               MaterialPageRoute(builder: (context) => ConversationEditDetails(
-                saveCallback: (String conversationName) async {
+                // TODO: Move saveCallback to somewhere else
+                saveCallback: (String conversationName, File? file) async {
+
+                  bool updatedImage = false;
+
+                  File? writtenFile;
+                  if (file != null) {
+                    updatedImage = file.hashCode != widget.conversation.icon.hashCode;
+                    writtenFile = await writeImage(
+                      widget.conversation.id,
+                      file.readAsBytesSync(),
+                    );
+                  }
+
                   widget.conversation.name = conversationName;
+                  widget.conversation.icon = writtenFile;
 
                   final db = await getDatabaseConnection();
                   db.update(
@@ -107,7 +130,15 @@ class _ConversationSettingsState extends State<ConversationSettings> {
                     whereArgs: [widget.conversation.id],
                   );
 
-                  await updateConversation(widget.conversation, includeUsers: true);
+                  await updateConversation(widget.conversation, updatedImage: updatedImage)
+                      .catchError((error) {
+                        String message = error.toString();
+                        if (error.runtimeType != UpdateDataException) {
+                          message = 'An error occured, please try again later';
+                        }
+
+                        showMessage(message, context);
+                      });
                   setState(() {});
                   Navigator.pop(context);
                 },
@@ -143,9 +174,9 @@ class _ConversationSettingsState extends State<ConversationSettings> {
             label: const Text(
               'Leave Conversation',
               style: TextStyle(fontSize: 16)
-),
-icon: const Icon(Icons.exit_to_app),
-style: const ButtonStyle(
+            ),
+            icon: const Icon(Icons.exit_to_app),
+            style: const ButtonStyle(
               alignment: Alignment.centerLeft,
             ),
             onPressed: () {

mobile/lib/views/main/conversation/settings_user_list_item.dart

@@ -47,48 +47,48 @@ class _ConversationSettingsUserListItemState extends State<ConversationSettingsU
     }
 
     return PopupMenuButton<String>(
-        itemBuilder: (context) => [
-          PopupMenuItem(
-                  value: 'admin',
-                  // row with 2 children
-                  child: Row(
-                    children: const [
-                      Icon(Icons.admin_panel_settings),
-                      SizedBox(
-                        width: 10,
-                      ),
-                      Text('Promote to Admin')
-                    ],
-                  ),
-          ),
-          PopupMenuItem(
-                  value: 'remove',
-                  // row with 2 children
-                  child: Row(
-                    children: const [
-                      Icon(Icons.cancel),
-                      SizedBox(
-                        width: 10,
-                      ),
-                      Text('Remove from chat')
-                    ],
-                  ),
-          ),
-        ],
-        offset: const Offset(0, 0),
-        elevation: 2,
-        // on selected we show the dialog box
-        onSelected: (String value) {
-          // if value 1 show dialog
-          if (value == 'admin') {
-            print('admin');
-            return;
-            // if value 2 show dialog
-          }
-          if (value == 'remove') {
-            print('remove');
-          }
-        },
+      itemBuilder: (context) => [
+        PopupMenuItem(
+                value: 'admin',
+                // row with 2 children
+                child: Row(
+                  children: const [
+                    Icon(Icons.admin_panel_settings),
+                    SizedBox(
+                      width: 10,
+                    ),
+                    Text('Promote to Admin')
+                  ],
+                ),
+        ),
+        PopupMenuItem(
+                value: 'remove',
+                // row with 2 children
+                child: Row(
+                  children: const [
+                    Icon(Icons.cancel),
+                    SizedBox(
+                      width: 10,
+                    ),
+                    Text('Remove from chat')
+                  ],
+                ),
+        ),
+      ],
+      offset: const Offset(0, 0),
+      elevation: 2,
+      // on selected we show the dialog box
+      onSelected: (String value) {
+        // if value 1 show dialog
+        if (value == 'admin') {
+          print('admin');
+          return;
+          // if value 2 show dialog
+        }
+        if (value == 'remove') {
+          print('remove');
+        }
+      },
     );
   }
 
@@ -104,7 +104,6 @@ class _ConversationSettingsUserListItemState extends State<ConversationSettingsU
                        children: <Widget>[
                          CustomCircleAvatar(
                              initials: widget.user.username[0].toUpperCase(),
-                             imagePath: null,
                              radius: 15,
                          ),
                          const SizedBox(width: 16),

mobile/lib/views/main/friend/list_item.dart

@@ -33,7 +33,6 @@ class _FriendListItemState extends State<FriendListItem> {
                 children: <Widget>[
                   CustomCircleAvatar(
                     initials: widget.friend.username[0].toUpperCase(),
-                    imagePath: null,
                   ),
                   const SizedBox(width: 16),
                   Expanded(

mobile/lib/views/main/friend/request_list_item.dart

@@ -46,7 +46,6 @@ class _FriendRequestListItemState extends State<FriendRequestListItem> {
                 children: <Widget>[
                   CustomCircleAvatar(
                     initials: widget.friend.username[0].toUpperCase(),
-                    imagePath: null,
                   ),
                   const SizedBox(width: 16),
                   Expanded(

mobile/lib/views/main/profile/profile.dart

@@ -1,10 +1,18 @@
 import 'dart:convert';
+import 'dart:io';
+import 'dart:typed_data';
 
+import 'package:Envelope/components/file_picker.dart';
 import 'package:Envelope/components/flash_message.dart';
+import 'package:Envelope/utils/encryption/aes_helper.dart';
 import 'package:Envelope/utils/storage/session_cookie.dart';
+import 'package:Envelope/utils/storage/write_file.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_dotenv/flutter_dotenv.dart';
+import 'package:image_picker/image_picker.dart';
+import 'package:mime/mime.dart';
 import 'package:qr_flutter/qr_flutter.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 import 'package:sliding_up_panel/sliding_up_panel.dart';
 import 'package:http/http.dart' as http;
 
@@ -31,6 +39,8 @@ class Profile extends StatefulWidget {
 class _ProfileState extends State<Profile> {
   final PanelController _panelController = PanelController();
 
+  bool showFileSelector = false;
+
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -63,7 +73,8 @@ class _ProfileState extends State<Profile> {
           child: Column(
             children: <Widget>[
               usernameHeading(),
-              const SizedBox(height: 30),
+              fileSelector(),
+              SizedBox(height: showFileSelector ? 10 : 30),
               settings(),
               const SizedBox(height: 30),
               logout(),
@@ -77,12 +88,20 @@ class _ProfileState extends State<Profile> {
   Widget usernameHeading() {
     return Row(
       children: <Widget> [
-        const CustomCircleAvatar(
-          icon: Icon(Icons.person, size: 40),
-          imagePath: null, // TODO: Add image here
+
+        CustomCircleAvatar(
+          image: widget.profile.image,
+          icon: const Icon(Icons.person, size: 40),
           radius: 30,
+          editImageCallback: () {
+            setState(() {
+              showFileSelector = true;
+            });
+          },
         ),
+
         const SizedBox(width: 20),
+
         Expanded(
           flex: 1,
           child: Text(
@@ -93,6 +112,7 @@ class _ProfileState extends State<Profile> {
             ),
           ),
         ),
+
         IconButton(
           onPressed: () => _panelController.open(),
           icon: const Icon(Icons.qr_code_2),
@@ -101,6 +121,59 @@ class _ProfileState extends State<Profile> {
     );
   }
 
+  Widget fileSelector() {
+    if (!showFileSelector) {
+      return const SizedBox.shrink();
+    }
+
+    return Padding(
+      padding: const EdgeInsets.only(top: 10),
+      child: FilePicker(
+        cameraHandle: _setProfileImage,
+        galleryHandleSingle: _setProfileImage,
+      )
+    );
+  }
+
+  Future<void> _setProfileImage(XFile image) async {
+    widget.profile.image = await writeImage(
+      widget.profile.id,
+      File(image.path).readAsBytesSync(),
+    );
+
+    setState(() {
+      showFileSelector = false;
+    });
+
+    saveProfile();
+
+    Map<String, dynamic> payload = {
+      'data': AesHelper.aesEncrypt(
+        widget.profile.symmetricKey!,
+        Uint8List.fromList(widget.profile.image!.readAsBytesSync())
+      ),
+      'mimetype': lookupMimeType(widget.profile.image!.path),
+      'extension': getExtension(widget.profile.image!.path),
+    };
+
+    http.post(
+      await MyProfile.getServerUrl('api/v1/auth/image'),
+      headers: {
+        'cookie': await getSessionCookie(),
+      },
+      body: jsonEncode(payload),
+    ).then((http.Response response) {
+      if (response.statusCode == 204) {
+        return;
+      }
+
+      showMessage(
+        'Could not change your default message expiry, please try again later.',
+        context,
+      );
+    });
+  }
+
   Widget logout() {
     bool isTesting = dotenv.env['ENVIRONMENT'] == 'development';
 
@@ -191,6 +264,8 @@ class _ProfileState extends State<Profile> {
                           context,
                         );
                       });
+
+                      saveProfile();
                     },
                 ))
               );
@@ -242,6 +317,7 @@ class _ProfileState extends State<Profile> {
                     privateKey: widget.profile.privateKey!,
                 ))
               );
+              saveProfile();
             }
           ),
         ],
@@ -259,8 +335,8 @@ class _ProfileState extends State<Profile> {
     });
 
     return Column(
-      children: [ 
-        Padding(   
+      children: [
+        Padding(
           padding: const EdgeInsets.all(20),
           child: QrImage(
             backgroundColor: Theme.of(context).colorScheme.primary,
@@ -282,4 +358,9 @@ class _ProfileState extends State<Profile> {
       ]
     );
   }
+
+  Future<void> saveProfile() async {
+    final preferences = await SharedPreferences.getInstance();
+    preferences.setString('profile', widget.profile.toJson());
+  }
 }

mobile/pubspec.lock

@@ -57,6 +57,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.0.1"
+  cross_file:
+    dependency: transitive
+    description:
+      name: cross_file
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.3.3+1"
   crypto:
     dependency: transitive
     description:
@@ -111,6 +118,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.4"
+  flutter_plugin_android_lifecycle:
+    dependency: transitive
+    description:
+      name: flutter_plugin_android_lifecycle
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.7"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -142,6 +156,41 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "4.0.1"
+  image_picker:
+    dependency: "direct main"
+    description:
+      name: image_picker
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.8.5+3"
+  image_picker_android:
+    dependency: transitive
+    description:
+      name: image_picker_android
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.8.5+2"
+  image_picker_for_web:
+    dependency: transitive
+    description:
+      name: image_picker_for_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.8"
+  image_picker_ios:
+    dependency: transitive
+    description:
+      name: image_picker_ios
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.8.5+6"
+  image_picker_platform_interface:
+    dependency: transitive
+    description:
+      name: image_picker_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.6.1"
   intl:
     dependency: "direct main"
     description:
@@ -184,6 +233,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.7.0"
+  mime:
+    dependency: "direct main"
+    description:
+      name: mime
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.2"
   path:
     dependency: "direct main"
     description:
@@ -191,6 +247,27 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.1"
+  path_provider:
+    dependency: "direct main"
+    description:
+      name: path_provider
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.11"
+  path_provider_android:
+    dependency: transitive
+    description:
+      name: path_provider_android
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.20"
+  path_provider_ios:
+    dependency: transitive
+    description:
+      name: path_provider_ios
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.11"
   path_provider_linux:
     dependency: transitive
     description:
@@ -198,6 +275,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.6"
+  path_provider_macos:
+    dependency: transitive
+    description:
+      name: path_provider_macos
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.6"
   path_provider_platform_interface:
     dependency: transitive
     description:
@@ -429,4 +513,4 @@ packages:
     version: "0.2.0+1"
 sdks:
   dart: ">=2.17.0 <3.0.0"
-  flutter: ">=2.8.0"
+  flutter: ">=2.8.1"

mobile/pubspec.yaml

@@ -25,6 +25,9 @@ dependencies:
   qr_flutter: ^4.0.0
   qr_code_scanner: ^1.0.1
   sliding_up_panel: ^2.0.0+1
+  image_picker: ^0.8.5+3
+  path_provider: ^2.0.11
+  mime: ^1.0.2
 
 dev_dependencies:
   flutter_test: