Merge pull request #123 from farabi-deriv/farabi/bot-2324/blocks-gett…

…ing-duplicated-on-clicking-add

Farabi/bot-2324/blocks-getting-duplicated-on-clicking-add

src/external/bot-skeleton/scratch/hooks/workspace_svg.js

@@ -79,20 +79,30 @@ window.Blockly.WorkspaceSvg.prototype.addBlockNode = function (block_node) {
     const { flyout } = DBotStore.instance;
     const block = window.Blockly.Xml.domToBlock(block_node, flyout.getFlyout().targetWorkspace);
     const top_blocks = this.getTopBlocks(true);
-    const new_block = flyout.getFlyout().createBlock(false, block);
+
+    if (config().single_instance_blocks.includes(block.type)) {
+        this.getAllBlocks().forEach(ws_block => {
+            if (ws_block.type === block.type && ws_block.id !== block.id) {
+                ws_block.dispose();
+            }
+        });
+    }
 
     if (top_blocks.length) {
         const last_block = top_blocks[top_blocks.length - 1];
         const last_block_xy = last_block.getRelativeToSurfaceXY();
         const extra_spacing = last_block.startHat_ ? window.Blockly.BlockSvg.START_HAT_HEIGHT : 0;
         const y = last_block_xy.y + last_block.getHeightWidth().height + extra_spacing + 30;
-        new_block.moveBy(last_block_xy.x, y);
+        block.moveBy(last_block_xy.x, y);
     }
 
+    flyout.setIsSearchFlyout(false);
+    flyout.setVisibility(false);
+
     // Call svgResize to avoid glitching workspace.
-    window.Blockly.svgResize(new_block.workspace);
+    window.Blockly.svgResize(block.workspace);
     // kept this commented since it is making a glitching issue,
-    //this.centerOnBlock(new_block.id, false);
+    // this.centerOnBlock(new_block.id, false);
 };
 
 /**