add: Login system

internal/controllers/user_controller.go

@@ -3,6 +3,8 @@ package controllers
 import (
 	"fmt"
 
+	"GoMembership/internal/constants"
+	"GoMembership/internal/middlewares"
 	"GoMembership/internal/models"
 	"GoMembership/internal/services"
 
@@ -25,6 +27,51 @@ type RegistrationData struct {
 	User models.User `json:"user"`
 }
 
+func (uc *UserController) LoginUser(c *gin.Context) {
+	var input struct {
+		Email    string `json:"email"`
+		Password string `json:"password"`
+	}
+
+	if err := c.ShouldBindJSON(&input); err != nil {
+		logger.Error.Printf("Couldn't decode input: %v", err.Error())
+		c.JSON(http.StatusBadRequest, gin.H{"error": "Couldn't decode request data"})
+		return
+	}
+
+	user, err := uc.Service.GetUserByEmail(input.Email)
+	if err != nil {
+		logger.Error.Printf("Error during user(%v) retrieval: %v\n", input.Email, err)
+		c.JSON(http.StatusNotFound, gin.H{"error": "Couldn't find user"})
+		return
+	}
+
+	ok, err := user.PasswordMatches(input.Password)
+	if err != nil {
+
+		logger.Error.Printf("Error during Password comparison: %v", err.Error())
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "couldn't calculate match"})
+		return
+	}
+	if !ok {
+
+		logger.Error.Printf("Wrong Password: %v %v", user.FirstName, user.LastName)
+		c.JSON(http.StatusNotAcceptable, gin.H{"error": "Wrong Password"})
+		return
+	}
+
+	token, err := middlewares.GenerateToken(user.ID)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to generate JWT token"})
+		return
+	}
+
+	c.JSON(http.StatusOK, gin.H{
+		"message": "Login successful",
+		"token":   token,
+	})
+}
+
 func (uc *UserController) RegisterUser(c *gin.Context) {
 
 	var regData RegistrationData
@@ -48,6 +95,9 @@ func (uc *UserController) RegisterUser(c *gin.Context) {
 	}
 	regData.User.Membership.SubscriptionModel = *selectedModel
 	// logger.Info.Printf("REGISTERING user: %#v", regData.User)
+
+	regData.User.RoleID = constants.Roles.Member
+
 	// Register User
 	id, token, err := uc.Service.RegisterUser(&regData.User)
 	if err != nil {
@@ -93,8 +143,8 @@ func (uc *UserController) RegisterUser(c *gin.Context) {
 		// Proceed without returning error since user registration is successful
 	}
 	c.JSON(http.StatusCreated, gin.H{
-		"status": "success",
-		"id":     regData.User.ID,
+		"message": "Registration successuful",
+		"id":      regData.User.ID,
 	})
 }