add basic cart

controllers/cartItemController.go

@@ -0,0 +1,239 @@
+package controllers
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+  "crypto/rand"
+  "encoding/hex"
+
+	"github.com/gin-gonic/gin"
+
+	"example.com/gin/test/models"
+	//"example.com/gin/test/services"
+	"example.com/gin/test/repositories"
+)
+
+type CartItemController interface {
+	//CRUDController
+	CartItemView(*gin.Context)
+	AddItemHandler(*gin.Context)
+	//EditCartItemHandler(*gin.Context)
+	//DeleteCartItemHandler(*gin.Context)
+}
+
+type cartItemController struct {}
+
+func NewCartItemController() CartItemController {
+	return &cartItemController{}
+}
+
+func generateSessionId() string {
+    bytes := make([]byte, 16) // 16 bytes = 128 bits
+    _, err := rand.Read(bytes)
+    if err != nil {
+        panic("failed to generate session ID")
+    }
+    return hex.EncodeToString(bytes)
+}
+
+func GetSessionId(ctx *gin.Context) string {
+	sessionId, err := ctx.Cookie("session_id")
+
+	if err != nil {
+		sessionId = generateSessionId()
+		ctx.SetCookie("session_id", sessionId, 3600, "/", "", false, true)
+	}
+
+	return sessionId
+}
+
+func (rc *cartItemController) NewCartItemFromForm(ctx *gin.Context) (models.CartItem, error) {
+	fmt.Println("NEWITEM")
+	sessionId := GetSessionId(ctx)
+
+	shopItemId, err := strconv.Atoi(ctx.PostForm("ShopItemId"))
+
+	if err != nil {
+		return models.CartItem{}, err
+	}
+
+	quantity := 1
+	//quantity, err := strconv.Atoi(ctx.PostForm("quantity"))
+
+	//if err != nil {
+	//	return models.CartItem{}, err
+	//}
+
+	cartItem := models.CartItem{
+		SessionId: sessionId,
+		ShopItemId: shopItemId,
+		Quantity: quantity,
+	}
+
+	fmt.Println("NEWITEM")
+	return cartItem, nil
+}
+
+
+func (rc *cartItemController) Create(c *gin.Context) {
+	cartItem, err := rc.NewCartItemFromForm(c)
+
+	if err != nil {
+		ReplyError(c, fmt.Errorf("cartItem creation failed: %s", err))
+		return
+	}
+
+	_, err = repositories.CartItems.Create(cartItem)
+
+	if err != nil {
+		ReplyError(c, fmt.Errorf("cartItem creation failed: %s", err))
+		return
+	}
+
+	ReplyOK(c, "cartItem was created")
+}
+
+
+func (rc *cartItemController) Update(c *gin.Context) {
+	cartItem, err := rc.NewCartItemFromForm(c)
+
+	if err != nil {
+		ReplyError(c, err)
+		return
+	}
+
+	_, err = repositories.CartItems.Update(cartItem)
+
+	if err != nil {
+		ReplyError(c, fmt.Errorf("cartItem creation failed: %s", err))
+		return
+	}
+
+	ReplyOK(c, "cartItem was updated")
+}
+
+//func (rc *cartItemController) Delete(c *gin.Context) {
+//	err := repositories.CartItems.DeleteBySessionId(c.Param("id"))
+//
+//	if err != nil {
+//		ReplyError(c, fmt.Errorf("cartItem deletion failed: %s", err))
+//		return
+//	}
+//
+//	ReplyOK(c, "cartItem was deleted")
+//}
+
+func (rc *cartItemController) CartItemView(c *gin.Context) {
+	sessionId := GetSessionId(c)
+
+	cartItems, err := repositories.CartItems.GetAllBySession(sessionId)
+
+	if err != nil {
+		c.HTML(http.StatusBadRequest, "cart.html", gin.H{ "data": gin.H{ "error": err } })
+	}
+
+	data := CreateSessionData(c, gin.H{
+		"cartItems": cartItems,
+	})
+
+	c.HTML(http.StatusOK, "cart.html", data)
+}
+
+func (rc *cartItemController) AddItemHandler(c *gin.Context) {
+	cartItem, err := rc.NewCartItemFromForm(c)
+
+	if err != nil {
+		fmt.Println(err)
+		c.HTML(http.StatusBadRequest, "cart.html", gin.H{ "error": err })
+		return
+	}
+
+	_, err = repositories.CartItems.Create(cartItem)
+	if err != nil {
+		data := CreateSessionData(c, gin.H{
+			"error": err,
+			"success": "",
+		})
+
+		c.HTML(http.StatusOK, "cart.html", data)
+		return
+	}
+
+	rc.CartItemView(c)
+}
+
+
+//func (rc *cartItemController) EditItemHandler(c *gin.Context) {
+//	cartItem, err := rc.NewCartItemFromForm(c)
+//
+//	if err != nil {
+//		c.HTML(http.StatusBadRequest, "edititem.html", gin.H{ "error": err })
+//		return
+//	}
+//
+//	newCartItem, err := repositories.ShopItems.GetById(c.Param("id"))
+//
+//	if err != nil {
+//		c.HTML(http.StatusBadRequest, "edititem.html", gin.H{ "error": err })
+//		return
+//	}
+//
+//	newCartItem.Name = cartItem.Name
+//	newCartItem.Abstract = cartItem.Abstract
+//	newCartItem.Description = cartItem.Description
+//	newCartItem.Price = cartItem.Price
+//	newCartItem.IsPublic = cartItem.IsPublic
+//	newCartItem.Tags = cartItem.Tags
+//
+//	tags, err := repositories.Tags.GetAll()
+//	if err != nil {
+//		c.HTML(http.StatusBadRequest, "edititem.html", gin.H{ "error": err })
+//		return
+//	}
+//
+//	_, err = repositories.CartItems.Update(newShopItem)
+//	if err != nil {
+//		data := CreateSessionData(c, gin.H{
+//			"error": err,
+//			"success": "",
+//			"tags": tags,
+//		})
+//
+//		c.HTML(http.StatusOK, "edititem.html", data)
+//		return
+//	}
+//
+//	data := CreateSessionData(c, gin.H{
+//		"error": "",
+//		"success": fmt.Sprintf("Item '%s' Updated", newCartItem.Name),
+//		"tags": tags,
+//	})
+//
+//	c.HTML(http.StatusOK, "edititem.html", data)
+//}
+
+//func (rc *cartItemController) DeleteItemHandler(c *gin.Context) {
+//	err := repositories.CartItems.DeleteById(c.Param("id"))
+//
+//	if err != nil {
+//		data := CreateSessionData(c, gin.H{
+//			"error": err,
+//			"success": "",
+//		})
+//
+//		c.HTML(http.StatusOK, "deleteitem.html", data)
+//	}
+//
+//	cartItems, _ := repositories.CartItems.GetAll()
+//	fmt.Println(len(cartItems))
+//
+//	data := CreateSessionData(c, gin.H{
+//		"title": "cartItem Page",
+//		"cartItems": shopItems,
+//	})
+//
+//	fmt.Println(data)
+//
+//	c.HTML(http.StatusOK, "index.html", data)
+//}

main.go

@@ -17,6 +17,7 @@ import(
 var(
 	shopItemController controllers.ShopItemController = controllers.NewShopItemController()
 	userController controllers.UserController = controllers.UserController{}
+	cartItemController controllers.CartItemController = controllers.NewCartItemController()
 	authValidator middlewares.AuthValidator = middlewares.AuthValidator{}
 )
 
@@ -84,6 +85,9 @@ func main() {
 		viewRoutes.GET("/tags", authValidator.RequireAuth, shopItemController.TagView)
 		viewRoutes.POST("/tags/:id", authValidator.RequireAuth, shopItemController.TagHandler)
 		viewRoutes.POST("/tags", authValidator.RequireAuth, shopItemController.AddTagHandler)
+		viewRoutes.GET("/cart", cartItemController.CartItemView)
+		viewRoutes.POST("/cart", cartItemController.AddItemHandler)
+
 		//write middleware that redirects to homescreen on register/login/reset for logged in users
 		viewRoutes.GET("/login", userController.LoginView)
 		viewRoutes.GET("/logout", userController.Logout)

models/cart.go

@@ -0,0 +1,12 @@
+package models
+
+import (
+	"gorm.io/gorm"
+)
+
+type CartItem struct {
+	gorm.Model
+	SessionId string `gorm:"index"`
+	ShopItemId int `gorm:"index"`
+	Quantity int
+}

repositories/cartItemRepository.go

@@ -0,0 +1,57 @@
+package repositories
+
+import(
+	"gorm.io/gorm"
+
+	"example.com/gin/test/models"
+)	
+
+type CartItemRepository interface {
+	Create(models.CartItem) (models.CartItem, error)	
+	GetAll() ([]models.CartItem, error)
+	GetAllBySession(string) ([]models.CartItem, error)
+	Update(models.CartItem) (models.CartItem, error)
+}
+
+type GORMCartItemRepository struct {
+	DB *gorm.DB
+}
+
+func NewGORMCartItemRepository(db *gorm.DB) CartItemRepository {
+	return &GORMCartItemRepository{
+		DB: db,
+	}
+}
+
+func (r *GORMCartItemRepository) Create(cartItem models.CartItem) (models.CartItem, error) {
+	result := r.DB.Create(&cartItem)
+	if result.Error != nil {
+		return models.CartItem{}, result.Error	
+	}
+
+	return cartItem, nil
+}
+
+func (r *GORMCartItemRepository) GetAll() ([]models.CartItem, error) {
+	var cartItems []models.CartItem
+	result := r.DB.Find(&cartItems)
+
+	return cartItems, result.Error
+}
+
+func (r *GORMCartItemRepository) GetAllBySession(sessionId string) ([]models.CartItem, error) {
+	var cartItems []models.CartItem
+	result := r.DB.Where("session_id = ?", sessionId).Find(&cartItems)
+
+	return cartItems, result.Error
+
+}
+
+func (r *GORMCartItemRepository) Update(cartItem models.CartItem) (models.CartItem, error) {
+	result := r.DB.Save(&cartItem)
+	if result.Error != nil {
+		return models.CartItem{}, result.Error
+	}
+
+	return cartItem, nil
+}

repositories/repository.go

@@ -12,6 +12,7 @@ var(
 	ShopItems ShopItemRepository
 	Users UserRepository
 	Tags TagRepository
+	CartItems CartItemRepository
 )
 
 func InitRepositories() {
@@ -20,7 +21,7 @@ func InitRepositories() {
 		panic("failed to connect to database")
 	}
 
-	err =  db.AutoMigrate(&models.ShopItem{}, &models.User{}, &models.Tag{})
+	err =  db.AutoMigrate(&models.ShopItem{}, &models.User{}, &models.Tag{}, &models.CartItem{})
 	if err != nil {
 		panic("failed to migrate database")
 	}
@@ -28,4 +29,5 @@ func InitRepositories() {
 	ShopItems = NewGORMShopItemRepository(db)
 	Users = NewGORMUserRepository(db)
 	Tags = NewGORMTagRepository(db)
+	CartItems = NewGORMCartItemRepository(db)
 }

views/addtag.html

@@ -0,0 +1,35 @@
+{{ template "header.html" . }}
+
+<div class="flex min-h-full flex-col justify-center px-6 py-12 lg:px-8">
+  <div class="sm:mx-auto sm:w-full sm:max-w-sm">
+    <img class="mx-auto h-10 w-auto" src="/static/img/circlea.png" alt="Your Company">
+    <h2 class="mt-10 text-center text-2xl/9 font-bold tracking-tight text-gray-900">Add Tag</h2>
+  </div>
+
+
+  <div class="mt-10 sm:mx-auto sm:w-full sm:max-w-sm">
+    <form class="space-y-6" action="#" method="POST" enctype="multipart/form-data">
+      <div>
+        <label for="name" class="block text-sm/6 font-medium text-gray-900">Name</label>
+        <div class="mt-2">
+          <input type="text" name="name" id="name" required class="block w-full rounded-md bg-white px-3 py-1.5 text-base text-gray-900 outline outline-1 -outline-offset-1 outline-gray-300 placeholder:text-gray-400 focus:outline focus:outline-2 focus:-outline-offset-2 focus:outline-indigo-600 sm:text-sm/6">
+        </div>
+      </div>
+
+      <p class="mt-10 text-center text-sm/6 text-red-500">
+      {{ .data.error }}
+      </p>
+      <p class="mt-10 text-center text-sm/6 text-green-500">
+      {{ .data.success }}
+      </p>
+
+
+      <div>
+        <button type="submit" class="flex w-full justify-center rounded-md bg-indigo-600 px-3 py-1.5 text-sm/6 font-semibold text-white shadow-sm hover:bg-indigo-500 focus-visible:outline focus-visible:outline-2 focus-visible:outline-offset-2 focus-visible:outline-indigo-600">Add Tag</button>
+      </div>
+    </form>
+  </div>
+</div>
+
+
+{{ template "footer.html" . }}

views/cart.html

@@ -0,0 +1,18 @@
+{{ template "header.html" . }}
+
+  {{ range .data.cartItems }}
+
+    <div class="group relative">
+      <div class="mt-4 flex justify-between">
+        <div>
+          <h3 class="text-sm text-gray-700">
+              {{ .ShopItemId }}
+          </h3>
+        </div>
+        <p class="text-sm font-medium text-gray-900">{{ .Quantity }} pieces</p>
+      </div>
+    </div>
+
+  {{ end }}
+
+{{ template "footer.html" . }}

views/header.html

@@ -33,8 +33,7 @@
       </div>
       {{ else }}
       <div class="absolute inset-y-0 right-0 flex items-center pr-2 sm:static sm:inset-auto sm:ml-6 sm:pr-0 px-4 sm:px-8">
-        <a href="/login" class="rounded-md bg-gray-900 m-2 px-3 py-2 text-sm font-medium text-gray-300 hover:bg-gray-700 hover:text-white">Login</a>
-        <a href="/register" class="rounded-md  bg-gray-900 m-2 px-3 py-2 text-sm font-medium text-gray-300 hover:bg-gray-700 hover:text-white">Register</a>
+        <a href="/cart" class="rounded-md bg-gray-900 m-2 px-3 py-2 text-sm font-medium text-gray-300 hover:bg-gray-700 hover:text-white">&#128722; Cart</a>
       </div>
       {{ end }}
     </div>

views/shopitem.html

@@ -8,9 +8,12 @@
                   <img class="w-full h-full object-cover" src="/{{ .data.shopItem.Image}}" alt="Product Image">
                 </div>
                 <div class="flex -mx-2 mb-4">
+                  <form action="/cart" method="POST">
+                    <input type="hidden" id="{{ .data.shopItem.ID}}" name="ShopItemId" value="{{ .data.shopItem.ID }}">
                     <div class="w-1/3 px-2">
-                        <button class="w-full bg-gray-900 dark:bg-gray-600 text-white py-2 px-4 rounded-full font-bold hover:bg-gray-800 dark:hover:bg-gray-700">Add to Cart</button>
+                        <button type="submit" class="w-full bg-gray-900 dark:bg-gray-600 text-white py-2 px-4 rounded-full font-bold hover:bg-gray-800 dark:hover:bg-gray-700">Add to Cart</button>
                     </div>
+                  </form>
 
     {{ if .loggedIn }}
                     <div class="w-1/3 px-2">