User backend registration

backend/controllers/users.go

@@ -1,34 +1,75 @@
 package controllers
 
 import (
+	"backend/models"
+	"backend/utils"
+	"errors"
+	"fmt"
 	"log"
+	"net/http"
 
 	"github.com/gin-gonic/gin"
 	"github.com/go-playground/validator/v10"
+	"github.com/jackc/pgx/v5/pgconn"
 )
 
 type User struct{}
 
 type RegisterForm struct {
 	Email          string `json:"email" validate:"required,email"`
-	Name           string `json:"name" validate:"required"`
-	Password       string `json:"password" validate:"required"`
-	RepeatPassword string `json:"repeatPassword" validate:"required"`
+	Name           string `json:"name" validate:"required,min=2,max=50"`
+	Password       string `json:"password" validate:"required,min=8"`
+	RepeatPassword string `json:"repeatPassword" validate:"required,min=8,eqfield=Password"`
 }
 
 func (u *User) Register(c *gin.Context) {
 	// Receive data from frontend, check if data is okay, hash password, call model
 	var data RegisterForm
 	if err := c.ShouldBindJSON(&data); err != nil {
-		// TODO: Handle error
+		utils.Error(c, err.Error(), http.StatusInternalServerError)
 	}
 
 	// Validate data
 	validate := validator.New()
 	if err := validate.Struct(data); err != nil {
 		// Handle error
-		log.Printf("[ERROR]: %v", err.Error())
+		utils.Error(c, err.Error(), http.StatusBadRequest)
+		return
 	}
 
-	// fmt.Println(data)
+	// Hash password
+	hash, err := utils.HashPassword(data.Password)
+	if err != nil {
+		utils.Error(c, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	// Insert into database
+	userMod := models.User{}
+	if err := userMod.Create(data.Email, data.Name, hash); err != nil {
+		// Find out postgres error
+		var pgErr *pgconn.PgError
+		if !errors.As(err, &pgErr) {
+			// Unknown error
+			utils.Error(c, fmt.Sprintf("[UNEXPECTED DB ERROR] %v", err.Error()), http.StatusInternalServerError)
+			return
+		}
+
+		// Postgres error
+		log.Printf("[ERROR] Postgres code: %s", pgErr.Code)
+		if pgErr.Code == "23505" {
+			// UNIQUE constraint violation (EMAIL TAKEN)
+			utils.Error(c, "Email already exists", http.StatusBadRequest)
+			return
+		}
+
+		// Unknown error
+		utils.Error(c, fmt.Sprintf("[UNKNOWN ERROR] %v", err.Error()), http.StatusInternalServerError)
+		return
+	}
+
+	// Return success
+	utils.Success(c, gin.H{
+		"message": "Successfully registered",
+	})
 }