implement dummy printer

controllers/printController.go

@@ -3,6 +3,7 @@ package controllers
 import (
 	"fmt"
 	"net/http"
+	"strconv"
 
 	"example.com/gin/test/models"
 	"example.com/gin/test/repositories"
@@ -11,7 +12,8 @@ import (
 
 type PrintController interface {
 	PrintVariantView(*gin.Context)
-	PrintVariantHandler(*gin.Context)
+	PrintCartView(*gin.Context)
+	PrintHandler(*gin.Context)
 }
 
 type printController struct{}
@@ -25,12 +27,14 @@ func (rc *printController) PrintVariantView(c *gin.Context) {
 
 	if err != nil {
 		c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
+		return
 	}
 
 	shopItem, err := repositories.ShopItems.GetById(fmt.Sprintf("%v", variant.ShopItemID))
 
 	if err != nil {
 		c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
+		return
 	}
 
 	type ShopItemVariantPair struct {
@@ -49,27 +53,86 @@ func (rc *printController) PrintVariantView(c *gin.Context) {
 	c.HTML(http.StatusOK, "printvariant.html", data)
 }
 
-func (rc *printController) PrintVariantHandler(c *gin.Context) {
+func (rc *printController) PrintCartView(c *gin.Context) {
-	err := repositories.ShopItems.DeleteById(c.Param("id"))
+	sessionId := GetSessionId(c)
 
+	cartItems, err := repositories.CartItems.GetAllBySession(sessionId)
 	if err != nil {
-		data := CreateSessionData(c, gin.H{
+		c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
-			"error":   err,
+		return
-			"success": "",
-		})
-
-		c.HTML(http.StatusOK, "deleteitem.html", data)
 	}
 
-	shopItems, _ := repositories.ShopItems.GetAll()
+	type ShopItemVariantPair struct {
-	fmt.Println(len(shopItems))
+		ShopItem    models.ShopItem
+		ItemVariant models.ItemVariant
+	}
+
+	var items []ShopItemVariantPair
+	for _, cartItem := range cartItems {
+		items = append(items, ShopItemVariantPair{ShopItem: cartItem.ShopItem, ItemVariant: cartItem.ItemVariant})
+	}
 
 	data := CreateSessionData(c, gin.H{
-		"title":     "shopItem Page",
+		"itemVariants": items,
-		"shopItems": shopItems,
 	})
 
-	fmt.Println(data)
+	c.HTML(http.StatusOK, "printvariant.html", data)
-
+}
-	c.HTML(http.StatusOK, "index.html", data)
+
+func (rc *printController) PrintHandler(c *gin.Context) {
+	variantIds := c.PostFormArray("variant-id[]")
+	variantAmounts := c.PostFormArray("variant-amount[]")
+	variantCoverPages := c.PostFormArray("variant-coverpage[]")
+
+	if len(variantIds) != len(variantAmounts) || len(variantIds) != len(variantCoverPages) {
+		c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": "Invalid arguments"}})
+		return
+	}
+
+	var printJobs []models.PrintJob
+	for idx := range variantIds {
+		variant, err := repositories.ShopItems.GetVariantById(variantIds[idx])
+
+		if err != nil {
+			c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
+			return
+		}
+
+		shopItem, err := repositories.ShopItems.GetById(fmt.Sprintf("%v", variant.ShopItemID))
+
+		if err != nil {
+			c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
+			return
+		}
+
+		coverPage := false
+		if variantCoverPages[idx] == "1" {
+			coverPage = true
+		}
+
+		variantAmount, err := strconv.Atoi(variantAmounts[idx])
+		if err != nil {
+			c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
+			return
+		}
+
+		printJob, err := models.NewPrintJob(shopItem, variant, coverPage, uint(variantAmount))
+
+		if err != nil {
+			c.HTML(http.StatusBadRequest, "error.html", gin.H{"data": gin.H{"error": err}})
+			return
+		}
+
+		printJobs = append(printJobs, printJob)
+	}
+
+	executeJobs := func() {
+		for _, printJob := range printJobs {
+			printJob.Execute()
+		}
+	}
+
+	go executeJobs()
+
+	c.HTML(http.StatusOK, "index.html", nil)
 }

main.go

@@ -83,7 +83,9 @@ func main() {
 		viewRoutes.GET("/shopitems/:id/delete", authValidator.RequireAuth, shopItemController.DeleteItemView)
 		viewRoutes.POST("/shopitems/:id/delete", authValidator.RequireAuth, shopItemController.DeleteItemHandler)
 		viewRoutes.GET("/variant/:id/print", authValidator.RequireAuth, printController.PrintVariantView)
-		viewRoutes.POST("/variant/:id/print", authValidator.RequireAuth, printController.PrintVariantHandler)
+		viewRoutes.GET("/cart/print", authValidator.RequireAuth, printController.PrintCartView)
+		viewRoutes.POST("/print", authValidator.RequireAuth, printController.PrintHandler)
+
 		viewRoutes.GET("/tags", authValidator.RequireAuth, shopItemController.TagView)
 		viewRoutes.POST("/tags/:id", authValidator.RequireAuth, shopItemController.TagHandler)
 		viewRoutes.POST("/tags", authValidator.RequireAuth, shopItemController.AddTagHandler)

models/printer.go

@@ -0,0 +1,55 @@
+package models
+
+import (
+	"fmt"
+)
+
+type PrintOption string
+
+const (
+	CoverPage PrintOption = "-o FrontCoverPage=Printed -o FrontCoverTray=BypassTray -o InputSlot=Tray1"
+	Colored   PrintOption = "-o SelectColor=Color"
+	Grayscale PrintOption = "-o SelectColor=Grayscale"
+)
+
+type PrintJob struct {
+	Pdf     string
+	Amount  uint
+	Options []PrintOption
+}
+
+func NewPrintJob(shopItem ShopItem, variant ItemVariant, coverPage bool, amount uint) (PrintJob, error) {
+	if shopItem.Pdf == "" {
+		return PrintJob{}, fmt.Errorf("ShopItem has no PDF assigned")
+	}
+
+	if amount > 100 {
+		return PrintJob{}, fmt.Errorf("Amount to big. This is denied for security reasons")
+	}
+
+	var result PrintJob
+	result.Pdf = shopItem.Pdf
+	result.Amount = amount
+
+	if variant.Name == "Colored" {
+		result.Options = append(result.Options, Colored)
+	}
+
+	if coverPage {
+		result.Options = append(result.Options, CoverPage)
+	}
+
+	return result, nil
+}
+
+func (p *PrintJob) Execute() error {
+	baseCommand := "lp -p KONICA_MINOLTA_KONICA_MINOLTA_bizhub_C258/Booklet "
+	baseCommand += fmt.Sprintf("-n %v ", p.Amount)
+
+	for _, option := range p.Options {
+		baseCommand += fmt.Sprintf(" %v ", option)
+	}
+
+	fmt.Println(baseCommand)
+	return nil
+}

views/printvariant.html

@@ -17,52 +17,47 @@
 
     </p>
 
-                          <form action="#" method="POST">
+    <form action="/print" method="POST">
-          <table class="w-full text-left font-medium text-gray-900 dark:text-white ">
+    <table class="w-full text-left font-medium text-gray-900 dark:text-white">
-            <tbody class="divide-y divide-gray-200 dark:divide-gray-800">
+        <tbody class="divide-y divide-gray-200 dark:divide-gray-800">
-                {{ range .data.itemVariants }}
+            {{ range .data.itemVariants }}
-              <tr>
+            <tr>
+                <input type="hidden" name="variant-id[]" value="{{ .ItemVariant.ID }}" required>
                 <td class="whitespace-nowrap py-4">
-                  <div class="flex items-center gap-4">
+                    <div class="flex items-center gap-4">
-                    <a href="/shopitems/{{ .ItemVariant.ShopItemID }}" class="flex items-center aspect-square w-8 h-10 shrink-0">
+                        <a href="/shopitems/{{ .ItemVariant.ShopItemID }}" class="flex items-center aspect-square w-8 h-10 shrink-0">
-                      <img class="h-auto w-full max-h-full dark:hidden" src="/{{ .ShopItem.Image }}" alt="imac image" />
+                            <img class="h-auto w-full max-h-full dark:hidden" src="/{{ .ShopItem.Image }}" alt="imac image" />
-                    </a>
+                        </a>
-                    <a href="/shopitems/{{ .ItemVariant.ShopItemID }}" class="hover:underline">{{ .ShopItem.Name }} - {{ .ItemVariant.Name }}</a>
+                        <a href="/shopitems/{{ .ItemVariant.ShopItemID }}" class="hover:underline">{{ .ShopItem.Name }} - {{ .ItemVariant.Name }}</a>
-                  </div>
+                    </div>
+                </td>
+
+                <td class="whitespace-nowrap py-4">
+                      <select name="variant-coverpage[]" required class="bg-gray-50 border border-gray-300 text-gray-900 text-sm rounded-lg focus:ring-blue-500 focus:border-blue-500 block w-full p-2.5 dark:bg-gray-700 dark:border-gray-600 dark:placeholder-gray-400 dark:text-white dark:focus:ring-blue-500 dark:focus:border-blue-500">
+                        <option selected value="0">Normal</option>
+                          <option value="1">CoverPage</option>
+                      </select>
                 </td>
                 <td class="whitespace-nowrap py-4">
-                  <label class="flex text-sm/6 items-center">
+                    Amount:
-                    <input type="checkbox" class="form-checkbox h-4 w-4 text-gray-900" value="CoverPage" name="CoverPage">
-                      <span class="ml-2 text-sm/6 text-gray-900">CoverPage</span>
-                  </label>
-                </td>
-                <td class="whitespace-nowrap py-4">
-                  Amount:
                 </td>
                 <td class="p-4 text-right text-base font-bold text-gray-900 dark:text-white">
-                  <div>
+                    <div>
-                    <input type="hidden" id="variant-name1" name="variant-name[]" value="B/W" required>
+                        <div class="mt-2">
-                    <div class="mt-2">
+                            <input type="number" name="variant-amount[]" step="1" min="0" 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">
-                      <input type="number" name="variant-value[]" id="variant-value1" step="1" min="1" 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>
-                  </div>
                 </td>
+            </tr>
+            {{ end }}
+        </tbody>
+    </table>
 
-              </tr>
+    <div class="max-lg:max-w-lg max-lg:mx-auto">
-                {{ end }}
+        <p class="font-normal text-base leading-7 text-gray-500 text-center mb-5 mt-6">If CoverPage selected, make sure you put paper in the BypassTray</p>
-
+        <button type="submit" class="rounded-full py-4 px-6 bg-indigo-600 text-white font-semibold text-lg w-full text-center transition-all duration-500 hover:bg-indigo-700">Print</button>
-            </tbody>
+    </div>
-          </table>
+</form>
-
-                <div class="max-lg:max-w-lg max-lg:mx-auto">
-                    <p class="font-normal text-base leading-7 text-gray-500 text-center mb-5 mt-6">If CoverPage
-                    selected, make sure you put paper in the BypassTray</p>
-                    <button type="submit"
-                        class="rounded-full py-4 px-6 bg-indigo-600 text-white font-semibold text-lg w-full text-center
-                        transition-all duration-500 hover:bg-indigo-700 ">Print</button>
-    
-                </div>
-                </form>
         </div>
       </div>
     </div>