install.js

// install.js
'use strict';

const fs    = require('fs');
const path  = require('path');
const zlib  = require('zlib');
const { execSync } = require('child_process');
const readline = require('readline');

const root         = __dirname;
const hostDir      = path.join(root, 'host');
const iconsDir     = path.join(root, 'extension', 'icons');
const manifestPath = path.join(hostDir, 'com.cdpbridge.host.json');
const batPath      = path.join(hostDir, 'run-host.bat');
const extDir       = path.join(root, 'extension');

// ── Parse CLI args ────────────────────────────────────────────────────────────

function getExtensionId() {
  // 1. --id <value> CLI flag
  const idIdx = process.argv.indexOf('--id');
  if (idIdx !== -1 && process.argv[idIdx + 1]) return process.argv[idIdx + 1];

  // 2. CDP_BRIDGE_EXT_ID environment variable
  if (process.env.CDP_BRIDGE_EXT_ID) return process.env.CDP_BRIDGE_EXT_ID;

  return null;
}

function promptExtensionId() {
  return new Promise((resolve) => {
    const rl = readline.createInterface({ input: process.stdin, output: process.stdout });
    rl.question('Enter your Chrome Extension ID (from chrome://extensions): ', (answer) => {
      rl.close();
      resolve(answer.trim());
    });
  });
}

// ── 1. npm install ────────────────────────────────────────────────────────────

console.log('[1/5] Installing host npm dependencies...');
execSync('npm install', { cwd: hostDir, stdio: 'inherit' });

// ── 2. Extension ID ───────────────────────────────────────────────────────────
console.log('[2/5] Configuring extension ID...');

async function main() {
let extId = getExtensionId();
if (!extId) {
  extId = await promptExtensionId();
}
if (!extId) {
  console.error('  ✗ No extension ID provided. You can set it later by editing:');
  console.error(`    ${manifestPath}`);
  console.error('  or re-running: node install.js --id <your-extension-id>');
  process.exit(1);
}
console.log(`  → Extension ID: ${extId}`);

// ── 3. Generate PNG icons ─────────────────────────────────────────────────────
console.log('[3/5] Generating icons...');

function crc32(buf) {
  const table = new Uint32Array(256);
  for (let i = 0; i < 256; i++) {
    let c = i;
    for (let j = 0; j < 8; j++) c = c & 1 ? (0xedb88320 ^ (c >>> 1)) : (c >>> 1);
    table[i] = c;
  }
  let crc = 0xffffffff;
  for (const b of buf) crc = table[(crc ^ b) & 0xff] ^ (crc >>> 8);
  return (crc ^ 0xffffffff) >>> 0;
}

function pngChunk(type, data) {
  const t   = Buffer.from(type, 'ascii');
  const len = Buffer.alloc(4);
  const crc = Buffer.alloc(4);
  len.writeUInt32BE(data.length);
  crc.writeUInt32BE(crc32(Buffer.concat([t, data])));
  return Buffer.concat([len, t, data, crc]);
}

function makePNG(size, r, g, b) {
  const sig  = Buffer.from([137, 80, 78, 71, 13, 10, 26, 10]);
  const ihdr = Buffer.alloc(13);
  ihdr.writeUInt32BE(size, 0);
  ihdr.writeUInt32BE(size, 4);
  ihdr[8] = 8; ihdr[9] = 2; // 8-bit RGB

  const raw = Buffer.alloc(size * (1 + 3 * size));
  for (let y = 0; y < size; y++) {
    const base = y * (1 + 3 * size);
    raw[base] = 0; // filter: None
    for (let x = 0; x < size; x++) {
      raw[base + 1 + x * 3]     = r;
      raw[base + 1 + x * 3 + 1] = g;
      raw[base + 1 + x * 3 + 2] = b;
    }
  }

  return Buffer.concat([
    sig,
    pngChunk('IHDR', ihdr),
    pngChunk('IDAT', zlib.deflateSync(raw)),
    pngChunk('IEND', Buffer.alloc(0))
  ]);
}

fs.mkdirSync(iconsDir, { recursive: true });
for (const size of [16, 48, 128]) {
  fs.writeFileSync(
    path.join(iconsDir, `icon${size}.png`),
    makePNG(size, 99, 102, 241)  // indigo #6366f1
  );
}

// ── 4. Update manifest path + allowed_origins ─────────────────────────────────
console.log('[4/5] Updating native host manifest...');
const isWindows = process.platform === 'win32';
const manifest  = JSON.parse(fs.readFileSync(manifestPath, 'utf8'));

if (isWindows) {
  manifest.path = batPath.replace(/\\/g, '/');
} else {
  // On Linux/macOS, create a shell launcher script
  const shPath = path.join(hostDir, 'run-host.sh');
  fs.writeFileSync(shPath, `#!/bin/sh\nexec node "$(dirname "$0")/host.js" 2>>"$(dirname "$0")/host.log"\n`);
  fs.chmodSync(shPath, 0o755);
  manifest.path = shPath;
}

manifest.allowed_origins = [`chrome-extension://${extId}/`];
fs.writeFileSync(manifestPath, JSON.stringify(manifest, null, 2));

// ── 5. Register native messaging host ────────────────────────────────────────
console.log('[5/5] Registering native messaging host...');

if (isWindows) {
  const regKey = 'HKCU\\Software\\Google\\Chrome\\NativeMessagingHosts\\com.cdpbridge.host';
  execSync(`reg add "${regKey}" /ve /t REG_SZ /d "${manifestPath}" /f`, { stdio: 'inherit' });
} else {
  // On Linux/macOS, symlink the manifest into the Chrome NativeMessagingHosts dir
  const home = require('os').homedir();
  const nmDirs = [];
  if (process.platform === 'darwin') {
    nmDirs.push(path.join(home, 'Library', 'Application Support', 'Google', 'Chrome', 'NativeMessagingHosts'));
    nmDirs.push(path.join(home, 'Library', 'Application Support', 'Chromium', 'NativeMessagingHosts'));
  } else {
    nmDirs.push(path.join(home, '.config', 'google-chrome', 'NativeMessagingHosts'));
    nmDirs.push(path.join(home, '.config', 'chromium', 'NativeMessagingHosts'));
  }
  let installed = false;
  for (const dir of nmDirs) {
    // Only install into dirs whose parent browser config exists
    if (!fs.existsSync(path.dirname(dir))) continue;
    fs.mkdirSync(dir, { recursive: true });
    const dest = path.join(dir, 'com.cdpbridge.host.json');
    try { fs.unlinkSync(dest); } catch (_) {}
    fs.symlinkSync(manifestPath, dest);
    console.log(`  → Symlinked manifest into ${dir}`);
    installed = true;
  }
  if (!installed) {
    console.warn('  ⚠ No Chrome/Chromium config directory found. You may need to manually copy the manifest.');
  }
}

console.log(`
================================================
 CDP Bridge — Installation Complete
================================================

NEXT STEPS:

  1. Open  chrome://extensions  in Chrome
  2. Enable "Developer mode" (top-right toggle)
  3. Click "Load unpacked" and select:
       ${extDir}
  4. Click the reload icon (↺) on the extension card

  The bridge starts automatically when the extension loads.
  HTTP API available at:  http://localhost:1232

  ENDPOINTS:
    GET  /health           Liveness check
    GET  /tabs             List open tabs
    POST /command          Execute a CDP command
                           Body: { "tabId": N, "method": "...", "params": {} }

  USAGE (from Claude Code or any HTTP client):
    curl http://localhost:1232/tabs
    curl -X POST http://localhost:1232/command \\
      -H "Content-Type: application/json" \\
      -d '{"tabId":N,"method":"Runtime.evaluate","params":{"expression":"document.title"}}'

================================================
`);

} // end main

main();