Envelope/Backend/Api/Auth/Signup.go

package Auth

import (
	"encoding/json"
	"io/ioutil"
	"log"
	"net/http"

	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Api/JsonSerialization"
	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Database"
	"git.tovijaeschke.xyz/tovi/Envelope/Backend/Models"
)

func Signup(w http.ResponseWriter, r *http.Request) {
	var (
		userData    Models.User
		requestBody []byte
		returnJson  []byte
		err         error
	)

	requestBody, err = ioutil.ReadAll(r.Body)
	if err != nil {
		log.Printf("Error encountered reading POST body: %s\n", err.Error())
		http.Error(w, "Error", http.StatusInternalServerError)
		return
	}

	userData, err = JsonSerialization.DeserializeUser(requestBody, []string{
		"id",
	}, false)
	if err != nil {
		log.Printf("Invalid data provided to Signup: %s\n", err.Error())
		http.Error(w, "Invalid Data", http.StatusUnprocessableEntity)
		return
	}

	if userData.Username == "" ||
		userData.Password == "" ||
		userData.ConfirmPassword == "" ||
		len(userData.AsymmetricPrivateKey) == 0 ||
		len(userData.AsymmetricPublicKey) == 0 {
		http.Error(w, "Invalid Data", http.StatusUnprocessableEntity)
		return
	}

	err = Database.CheckUniqueUsername(userData.Username)
	if err != nil {
		http.Error(w, "Invalid Data", http.StatusUnprocessableEntity)
		return
	}

	userData.Password, err = HashPassword(userData.Password)
	if err != nil {
		http.Error(w, "Error", http.StatusInternalServerError)
		return
	}

	err = Database.CreateUser(&userData)
	if err != nil {
		http.Error(w, "Error", http.StatusInternalServerError)
		return
	}

	returnJson, err = json.MarshalIndent(userData, "", "  ")
	if err != nil {
		http.Error(w, "Error", http.StatusInternalServerError)
		return
	}

	// Return updated json
	w.WriteHeader(http.StatusOK)
	w.Write(returnJson)
}