Merge pull request #216 from LD-Reborn/191-feature-add-drag-and-drop-functionality-to-print-preview

191 feature add drag and drop functionality to print preview

src/Views/Shared/_Batch.cshtml

@@ -83,7 +83,7 @@
                 } else {
                     assetCard.innerHTML = `
                         <div class="card-body">
-                            <h6 class="card-title"><strong>Asset ${i}:</strong> @T["Empty"]</h6>
+                            <h6 class="card-title"><strong>Asset ${i + 1}:</strong> @T["Empty"]</h6>
                             <div class="row">
                                 <div id="printPreviewBatchButtons${i}" class="col-md-1 justify-content-end" style="margin-left: auto; width: auto;">
                                 </div>
@@ -148,6 +148,7 @@
                 modalBody.appendChild(errorDiv);
             }
         }
+        enableDragAndDrop();
     });
 
     async function renderBarcodePreview(containerId = "printPreviewContainer") {
@@ -174,6 +175,7 @@
             const cell = document.createElement("div");
             cell.className = "barcode-cell border rounded p-1 d-flex flex-column align-items-center justify-content-center";
             cell.style.minHeight = "120px";
+            cell.setAttribute("data-id", i);
             var isMobileM = window.innerWidth < 992 && window.innerWidth >= 576;
             var isMobileS = window.innerWidth < 576;
 
@@ -216,15 +218,20 @@
                 grid.appendChild(cell);
             }
         }
+        enableBarcodeDragAndDrop();
     }
 
     function moveCardInBatch(index, direction) {
+        const newIndex = direction === 'up' ? index - 1 : index - 0 + 1;
+        swapCardsInBatch(index, newIndex);
+    }
+
+    function swapCardsInBatch(index, newIndex) {
         let batch = getAssetIdsFromBatch();
         padNulls(batch, 24);
 
         if (!batch || batch.length === 0) return;
 
-        const newIndex = direction === 'up' ? index - 1 : index - 0 + 1;
         // Prevent out-of-bounds movement
         if (newIndex < 0 || newIndex >= batch.length) return;
 
@@ -244,7 +251,131 @@
         localStorage.setItem("printBatch", JSON.stringify(batch));
         renderBarcodePreview();
     }
+    
+    function enableDragAndDrop() {
+        const cards = document.querySelectorAll('#printModal .card');
+        const modalBody = document.querySelector('#printModal .modal-body');
+        let draggedCard = null;
 
+        cards.forEach(card => {
+            card.setAttribute('draggable', 'true');
+
+            card.addEventListener('dragstart', e => {
+                draggedCard = card;
+                e.dataTransfer.effectAllowed = 'move';
+                e.target.style.opacity = '0.5';
+            });
+
+            card.addEventListener('dragend', e => {
+                e.target.style.opacity = '1';
+                draggedCard = null;
+                updateBatchOrderFromDOM();
+            });
+
+            card.addEventListener('dragover', e => {
+                e.preventDefault();
+                e.dataTransfer.dropEffect = 'move';
+                const bounding = card.getBoundingClientRect();
+                const offset = bounding.y + (bounding.height / 2);
+                if (e.clientY - offset > 0) {
+                    card.style['border-bottom'] = '2px solid #007bff';
+                    card.style['border-top'] = '';
+                } else {
+                    card.style['border-top'] = '2px solid #007bff';
+                    card.style['border-bottom'] = '';
+                }
+            });
+
+            card.addEventListener('dragleave', e => {
+                card.style['border-bottom'] = '';
+                card.style['border-top'] = '';
+            });
+
+            card.addEventListener('drop', e => {
+                e.preventDefault();
+                card.style['border-bottom'] = '';
+                card.style['border-top'] = '';
+                const bounding = card.getBoundingClientRect();
+                const offset = bounding.y + (bounding.height / 2);
+                if (e.clientY - offset > 0) {
+                    card.after(draggedCard);
+                } else {
+                    card.before(draggedCard);
+                }
+                updateBatchOrderFromDOM();
+            });
+        });
+    }
+
+    function updateBatchOrderFromDOM() {
+        const newOrder = [];
+        const cards = document.querySelectorAll('#printModal .card');
+
+        cards.forEach((card, index) => {
+            // Update index attribute
+            card.setAttribute('data-card-index', index);
+
+            // Update the title text
+            const title = card.querySelector('.card-title strong');
+            if (title) title.textContent = `Asset ${index + 1}:`;
+
+            // Get asset CN if available
+            const assetCn = card.querySelector('.card-body')?.getAttribute('data-cn');
+            newOrder.push(assetCn || null);
+        });
+
+        localStorage.setItem("printBatch", JSON.stringify(newOrder));
+        renderBarcodePreview("printPreviewContainer");
+    }
+
+    function enableBarcodeDragAndDrop() {
+        const cells = document.querySelectorAll('#printPreviewContainer .barcode-cell');
+        const container = document.querySelector('#printPreviewContainer .barcode-grid');
+        let draggedCell = null;
+
+        cells.forEach(cell => {
+            cell.setAttribute('draggable', 'true');
+
+            cell.addEventListener('dragstart', e => {
+                draggedCell = cell;
+                e.dataTransfer.effectAllowed = 'move';
+                cell.style.opacity = '0.5';
+            });
+
+            cell.addEventListener('dragend', e => {
+                cell.style.opacity = '1';
+                draggedCell = null;
+            });
+
+            cell.addEventListener('dragover', e => {
+                e.preventDefault();
+                const bounding = cell.getBoundingClientRect();
+                const offset = bounding.y + bounding.height / 2;
+                if (e.clientY - offset > 0) {
+                    cell.style['border-bottom'] = '2px solid #007bff';
+                    cell.style['border-top'] = '';
+                } else {
+                    cell.style['border-top'] = '2px solid #007bff';
+                    cell.style['border-bottom'] = '';
+                }
+            });
+
+            cell.addEventListener('dragleave', e => {
+                cell.style['border-bottom'] = '';
+                cell.style['border-top'] = '';
+            });
+
+            cell.addEventListener('drop', e => {
+                e.preventDefault();
+                cell.style['border-bottom'] = '';
+                cell.style['border-top'] = '';
+                cell.after(draggedCell);
+                let index = cell.getAttribute("data-id");
+                let newIndex = draggedCell.getAttribute("data-id");
+                swapCardsInBatch(index, newIndex);
+            });
+        });
+    }
 
     function getAssetIdsFromBatch() {
         let currentData = JSON.parse(localStorage.getItem("printBatch"));
@@ -359,10 +490,16 @@
                 </head>
                 <body>
                     <div id="barcodeGrid" class="barcode-grid"></div>
-                    <script src="https://cdn.jsdelivr.net/npm/jsbarcode@3.11.6/dist/JsBarcode.all.min.js"><\/script>
+                    <script id="jsbarcodeScript" src="https://cdn.jsdelivr.net/npm/jsbarcode@3.11.6/dist/JsBarcode.all.min.js"><\/script>
                 </body>
             </html>
         `);
+        const waitForJsBarcode = new Promise(resolve => {
+            const script = printWindow.document.getElementById("jsbarcodeScript");
+            script.onload = () => resolve();
+        });
+
+        await waitForJsBarcode;
         const grid = printWindow.document.getElementById("barcodeGrid");
 
         for (let i = 0; i < batch.length; i++) {