Encrypted messaging app
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package Database
import (
"database/sql"
"time"
"github.com/gofrs/uuid"
"gorm.io/gorm"
"gorm.io/gorm/clause"
)
// FriendRequest Set with Friend being the requestee, and UserID being the requester
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
FriendImagePath string ` json:"friend_image_path"`
FriendPublicAsymmetricKey string ` json:"asymmetric_public_key"` // Stored encrypted
FriendRequestDeviceTokens []FriendRequestDeviceToken ` json:"tokens"`
SymmetricKey string `gorm:"not null" json:"symmetric_key"` // Stored encrypted
AcceptedAt sql.NullTime ` json:"accepted_at"`
CreatedAt time.Time `gorm:"not null" json:"created_at"`
}
type FriendRequestList []FriendRequest
// GetFriendRequestByID gets friend request
func GetFriendRequestByID(id string) (FriendRequest, error) {
var (
friendRequest FriendRequest
err error
)
err = DB.Preload(clause.Associations).
First(&friendRequest, "id = ?", id).
Error
return friendRequest, err
}
// GetFriendRequestsByUserID gets friend request by user id
func GetFriendRequestsByUserID(userID string, page int, acceptedAt time.Time) ([]FriendRequest, error) {
var (
query *gorm.DB
friends []FriendRequest
offset int
err error
)
offset = page * PageSize
query = DB.Model(FriendRequest{}).
Preload("FriendRequestDeviceTokens.DeviceToken").
Where("user_id = ?", userID)
if !acceptedAt.IsZero() {
query = query.Where("accepted_at > ?", acceptedAt).
Or("created_at > ?", acceptedAt)
} else {
query = query.
Offset(offset).
Limit(PageSize)
if page > 0 {
query = query.Where("accepted_at IS NULL")
}
}
err = query.
Order("created_at DESC").
Find(&friends).
Error
return friends, err
}
// CreateFriendRequest creates friend request
func (friendRequest *FriendRequest) CreateFriendRequest() error {
return DB.Session(&gorm.Session{FullSaveAssociations: true}).
Create(friendRequest).
Error
}
// CreateFriendRequests creates multiple friend requests
func (friendRequest *FriendRequestList) CreateFriendRequests() error {
return DB.Session(&gorm.Session{FullSaveAssociations: true}).
Create(friendRequest).
Error
}
// UpdateFriendRequest Updates friend request
func (friendRequest *FriendRequest) UpdateFriendRequest() error {
return DB.Where("id = ?", friendRequest.ID).
Updates(friendRequest).
Error
}
// DeleteFriendRequest deletes friend request
func (friendRequest *FriendRequest) DeleteFriendRequest() error {
return DB.Session(&gorm.Session{FullSaveAssociations: true}).
Delete(friendRequest).
Error
}
func (friendRequest *FriendRequest) AttachDeviceToken(deviceToken DeviceToken, requester bool) error {
var (
requestToken FriendRequestDeviceToken
err error
)
requestToken = FriendRequestDeviceToken{
DeviceToken: deviceToken,
FriendRequestID: friendRequest.ID,
}
err = DB.Session(&gorm.Session{FullSaveAssociations: true}).
Create(&requestToken).
Error
return err
}