InvoiceChaser v1.0.0 — Freelancer Payment Tracker & Auto Follow-Up Chrome Extension

scripts/gen-icons.ts

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+// Generate simple 1-color PNG icons using raw buffer construction
+// PNG signature + IHDR + IDAT + IEND for a solid-color square
+
+import fs from "fs";
+import path from "path";
+import { fileURLToPath } from "url";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+function createSolidPng(size: number, r: number, g: number, b: number): Buffer {
+  // Simple zlib compression for raw RGBA data
+  // This is a minimal approach; for solid colors we can construct a valid PNG
+  // Using a pre-built minimal solid color PNG template would be easier
+  // Let's use a small helper that creates a valid PNG via canvas-like approach
+  // Actually, let's just write a simple PNG with the minimal required chunks
+
+  const width = size;
+  const height = size;
+  const bitDepth = 8;
+  const colorType = 2; // RGB
+
+  // PNG signature
+  const signature = Buffer.from([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]);
+
+  // IHDR chunk
+  const ihdrData = Buffer.alloc(13);
+  ihdrData.writeUInt32BE(width, 0);
+  ihdrData.writeUInt32BE(height, 4);
+  ihdrData.writeUInt8(bitDepth, 8);
+  ihdrData.writeUInt8(colorType, 9);
+  ihdrData.writeUInt8(0, 10); // compression
+  ihdrData.writeUInt8(0, 11); // filter
+  ihdrData.writeUInt8(0, 12); // interlace
+
+  const ihdrChunk = makeChunk("IHDR", ihdrData);
+
+  // IDAT chunk - raw image data with filter byte
+  // Each row: 1 filter byte (0 = none) + width * 3 bytes (RGB)
+  const rowSize = 1 + width * 3;
+  const imageData = Buffer.alloc(rowSize * height);
+  for (let y = 0; y < height; y++) {
+    imageData[y * rowSize] = 0; // filter: none
+    for (let x = 0; x < width; x++) {
+      const offset = y * rowSize + 1 + x * 3;
+      imageData[offset] = r;
+      imageData[offset + 1] = g;
+      imageData[offset + 2] = b;
+    }
+  }
+
+  const compressed = zlibDeflate(imageData);
+  const idatChunk = makeChunk("IDAT", compressed);
+
+  // IEND chunk
+  const iendChunk = makeChunk("IEND", Buffer.alloc(0));
+
+  return Buffer.concat([signature, ihdrChunk, idatChunk, iendChunk]);
+}
+
+function makeChunk(type: string, data: Buffer): Buffer {
+  const typeBuf = Buffer.from(type, "ascii");
+  const lenBuf = Buffer.alloc(4);
+  lenBuf.writeUInt32BE(data.length, 0);
+  const crcBuf = Buffer.alloc(4);
+  const crcData = Buffer.concat([typeBuf, data]);
+  crcBuf.writeInt32BE(crc32(crcData), 0);
+  return Buffer.concat([lenBuf, typeBuf, data, crcBuf]);
+}
+
+function crc32(buf: Buffer): number {
+  const table = new Int32Array(256);
+  for (let i = 0; i < 256; i++) {
+    let c = i;
+    for (let k = 0; k < 8; k++) {
+      c = (c & 1) ? (0xedb88320 ^ (c >>> 1)) : (c >>> 1);
+    }
+    table[i] = c;
+  }
+  let crc = -1;
+  for (let i = 0; i < buf.length; i++) {
+    crc = table[(crc ^ buf[i]) & 0xff] ^ (crc >>> 8);
+  }
+  return (crc ^ -1) >>> 0;
+}
+
+function zlibDeflate(data: Buffer): Buffer {
+  // Minimal deflate: no compression blocks (type 0) for small data
+  // For larger images, we need proper zlib. Let's use Node's built-in zlib.
+  import("zlib").then((zlib) => {
+    // Not needed - we'll do this synchronously via a different approach
+  });
+  // Actually, we can use the zlib module directly since we're in Node
+  const zlib = require("zlib");
+  return zlib.deflateRawSync(data);
+}
+
+const iconsDir = path.join(__dirname, "..", "src", "icons");
+fs.mkdirSync(iconsDir, { recursive: true });
+
+// Green color (#22c55e) for InvoiceChaser
+const sizes = [16, 48, 128];
+for (const size of sizes) {
+  const png = createSolidPng(size, 34, 197, 94);
+  fs.writeFileSync(path.join(iconsDir, `icon${size}.png`), png);
+}
+
+console.log("Icons generated successfully");