New Plugin (Full Pull Request)

src/lib/extensions.js

@@ -5,6 +5,13 @@
         pleas dont remove them :)
 */
 export default [
+    {
+        name: "Date to Hex",
+        description: "Blocks to change a date to hex and vice versa.",
+        code: "AeroHutch/date-to-hex.js",
+        banner: "AeroHutch/date-to-hex.png",
+        creator: "AeroHutch",
+    },
     {
         name: "Pen+",
         description: "Extended pen section! Adds blocks for drawing triangles using textures and tints, drawing images and editing their pixels, etc.",

static/extensions/AeroHutch/date-to-hex.js

@@ -0,0 +1,73 @@
+(function(Scratch) {
+  'use strict';
+
+  class HexDatePlugin {
+    getInfo() {
+      return {
+        id: 'hexDate',
+        name: 'Date to Hex',
+        blocks: [
+          {
+            opcode: 'dateToHex',
+            blockType: Scratch.BlockType.REPORTER,
+            text: 'convert date [DATE] to hex bytes',
+            arguments: {
+              DATE: {
+                type: Scratch.ArgumentType.STRING,
+                defaultValue: "2024-01-01"
+              }
+            }
+          },
+          {
+            opcode: 'hexToDate',
+            blockType: Scratch.BlockType.REPORTER,
+            text: 'convert hex [HEX] to date string',
+            arguments: {
+              HEX: {
+                type: Scratch.ArgumentType.STRING,
+                defaultValue: "0000018CD05D2000"
+              }
+            }
+          }
+        ]
+      };
+    }
+
+    dateToHex(args) {
+      const date = new Date(args.DATE);
+      const timestamp = date.getTime();
+
+      if (isNaN(timestamp)) return "Invalid Date";
+
+      // Create an 8-byte buffer
+      const buffer = new ArrayBuffer(8);
+      const view = new DataView(buffer);
+
+      // Write as Big-Endian 64-bit integer
+      // Note: BigInt is used because JS numbers lose precision above 53 bits
+      view.setBigUint64(0, BigInt(timestamp), false);
+
+      // Convert buffer to Hex string
+      return Array.from(new Uint8Array(buffer))
+        .map(b => b.toString(16).padStart(2, '0'))
+        .join('')
+        .toUpperCase();
+    }
+
+    hexToDate(args) {
+      try {
+        const hex = args.HEX.replace(/\s/g, '');
+        const bytes = new Uint8Array(hex.match(/.{1,2}/g).map(byte => parseInt(byte, 16)));
+        const view = new DataView(bytes.buffer);
+
+        // Read as Big-Endian 64-bit integer
+        const timestamp = Number(view.getBigUint64(0, false));
+        return new Date(timestamp).toString();
+      } catch (e) {
+        return "Invalid Hex";
+      }
+    }
+  }
+
+  Scratch.extensions.register(new HexDatePlugin());
+})(Scratch);