webpack.config.js

const webpack = require("webpack");
const path = require("path");
const fileSystem = require("fs-extra");
const env = require("./utils/env");
const CopyWebpackPlugin = require("copy-webpack-plugin");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const TerserPlugin = require("terser-webpack-plugin");

const isDev = env.NODE_ENV === "development";

// SCREENITY_BS_BUILD=1: slim build for BrowserStack inline-CRX size limit.
// drops post-recording UI + WASM. recording + camera paths preserved.
const isBsBuild = process.env.SCREENITY_BS_BUILD === "1";
const BS_DROPPED_ENTRIES = new Set([
  "cloudrecorder",
  "download",
  "waveform",
  "setup",
  "playground",
]);

const ASSET_PATH = process.env.ASSET_PATH || "/";

if (process.env.SCREENITY_SKIP_ENV) {
  // open-source release build, no dotenv
  console.log("[screenity] env: none (SCREENITY_SKIP_ENV), no app/api URLs baked");
} else {
  // SCREENITY_USE_LOCAL_ENV=1: minified prod-style build still pointing at
  // localhost, for auth flows against a local dev server.
  const envFile =
    isDev || process.env.SCREENITY_USE_LOCAL_ENV === "1"
      ? ".env.local"
      : ".env.production";
  const shadowKeys = [
    "SCREENITY_APP_BASE",
    "SCREENITY_API_BASE_URL",
    "SCREENITY_WEBSITE_BASE",
  ];
  const preset = Object.fromEntries(shadowKeys.map((k) => [k, process.env[k]]));
  const { parsed } = require("dotenv").config({ path: envFile });
  // dotenv never overrides shell-exported vars, so those silently win. Warn loudly.
  for (const key of shadowKeys) {
    if (
      preset[key] !== undefined &&
      parsed?.[key] !== undefined &&
      preset[key] !== parsed[key]
    ) {
      console.warn(
        `[screenity] WARNING: shell ${key}=${preset[key]} overrides ${envFile} (${parsed[key]})`,
      );
    }
  }
  console.log(
    `[screenity] env: ${envFile}  SCREENITY_APP_BASE=${
      process.env.SCREENITY_APP_BASE || "(unset)"
    }  SCREENITY_API_BASE_URL=${process.env.SCREENITY_API_BASE_URL || "(unset)"}`,
  );
}

// Entry points for the different pages
const entryPoints = {
  background: path.join(__dirname, "src", "pages", "Background", "index.js"),
  contentScript: path.join(__dirname, "src", "pages", "Content", "index.jsx"),
  recorder: path.join(__dirname, "src", "pages", "Recorder", "index.jsx"),
  recorderkeepalive: path.join(
    __dirname,
    "src",
    "pages",
    "Recorder",
    "recorderKeepalive.js"
  ),
  cloudrecorder: path.join(
    __dirname,
    "src",
    "pages",
    "CloudRecorder",
    "index.jsx"
  ),
  offscreenrecorder: path.join(
    __dirname,
    "src",
    "pages",
    "OffscreenRecorder",
    "index.jsx"
  ),
  camera: path.join(__dirname, "src", "pages", "Camera", "index.jsx"),
  waveform: path.join(__dirname, "src", "pages", "Waveform", "index.jsx"),
  permissions: path.join(__dirname, "src", "pages", "Permissions", "index.jsx"),
  setup: path.join(__dirname, "src", "pages", "Setup", "index.jsx"),
  playground: path.join(__dirname, "src", "pages", "Playground", "index.jsx"),
  region: path.join(__dirname, "src", "pages", "Region", "index.jsx"),
  download: path.join(__dirname, "src", "pages", "Download", "index.jsx"),
  editor: path.join(__dirname, "src", "pages", "Editor", "index.jsx"),
  localplaybackbridge: path.join(
    __dirname,
    "src",
    "pages",
    "LocalPlaybackBridge",
    "index.js"
  ),
  remuxoffscreen: path.join(
    __dirname,
    "src",
    "pages",
    "RemuxOffscreen",
    "index.js"
  ),
  // chunkLoading: a worker has no document, so the default DOM script-tag
  // loader would throw on the lazy AAC encoder import.
  remuxworker: {
    import: path.join(__dirname, "src", "pages", "RemuxOffscreen", "worker.js"),
    chunkLoading: "import-scripts",
  },
  recorderopfsworker: path.join(
    __dirname,
    "src",
    "pages",
    "Recorder",
    "recorderStorage",
    "opfs",
    "writerWorker.js"
  ),
};

if (isBsBuild) {
  for (const k of Object.keys(entryPoints)) {
    if (BS_DROPPED_ENTRIES.has(k)) delete entryPoints[k];
  }
  console.log(
    `[webpack] SCREENITY_BS_BUILD: dropped entries [${[...BS_DROPPED_ENTRIES].join(",")}]`,
  );
}

const htmlPlugins = Object.keys(entryPoints)
  .map((entryName) => {
    // Skip background script and worker bundles; they have no HTML page.
    if (
      entryName === "background" ||
      entryName === "contentScript" ||
      entryName === "remuxworker" ||
      entryName === "recorderopfsworker" ||
      entryName === "recorderkeepalive"
    ) {
      return null;
    }

    // Map entry names to folder names (for multi-word entries)
    const folderNameMap = {
      cloudrecorder: "CloudRecorder",
      offscreenrecorder: "OffscreenRecorder",
      remuxoffscreen: "RemuxOffscreen",
      localplaybackbridge: "LocalPlaybackBridge",
    };

    const folderName =
      folderNameMap[entryName] ||
      entryName.charAt(0).toUpperCase() + entryName.slice(1);

    const templatePath = path.join(
      __dirname,
      "src",
      "pages",
      folderName,
      "index.html"
    );

    // Inject keepalive before the main bundle so audio/locks/mediaSession
    // signals are live before heavy parse; otherwise hidden-tab throttling
    // drops encoders to ~5fps for the first 15s. Manual sort because auto
    // sort flips order based on the chunk graph.
    const needsKeepalive =
      entryName === "recorder" || entryName === "cloudrecorder";
    const chunks = needsKeepalive
      ? ["recorderkeepalive", entryName]
      : [entryName];

    const options = {
      template: templatePath,
      filename: `${entryName}.html`,
      chunks,
      cache: true,
      ...(needsKeepalive ? { chunksSortMode: "manual" } : {}),
    };

    options.favicon = path.join(__dirname, "src", "assets", "favicon.png");

    return new HtmlWebpackPlugin(options);
  })
  .filter(Boolean); // Filter out null values

const fileExtensions = [
  "jpg",
  "jpeg",
  "png",
  "gif",
  "eot",
  "otf",
  "svg",
  "ttf",
  "woff",
  "woff2",
];

const secretsPath = path.join(__dirname, `secrets.${env.NODE_ENV}.js`);
const alias = { "react-dom": "@hot-loader/react-dom" };

if (fileSystem.existsSync(secretsPath)) {
  alias["secrets"] = secretsPath;
}

const config = {
  mode: process.env.NODE_ENV || "production",
  performance: { hints: false },
  entry: entryPoints,

  // Persistent filesystem cache for fast rebuilds
  cache: {
    type: "filesystem",
    buildDependencies: {
      config: [__filename],
    },
  },

  output: {
    filename: "[name].bundle.js",
    // chrome rejects extension files starting with "_". force a "chunk."
    // prefix so webpack's default _f608.bundle.js etc. don't trip it.
    chunkFilename: "chunk.[name].[contenthash:8].bundle.js",
    path: path.resolve(__dirname, "build"),
    // Clean one-shot builds so a dev build after a prod build can't mix stale
    // artifacts. Only the hot-reload server skips the 40MB asset re-copy.
    clean: !(isDev && process.env.WEBPACK_SERVE),
    publicPath: ASSET_PATH,
  },
  module: {
    rules: [
      {
        test: /\.(css|scss)$/,
        use: [
          { loader: "style-loader" },
          { loader: "css-loader" },
          {
            loader: "sass-loader",
            options: { sourceMap: true },
          },
        ],
      },
      {
        test: new RegExp(`.(${fileExtensions.join("|")})$`),
        type: "asset/resource",
        exclude: /node_modules/,
      },
      {
        test: /\.html$/,
        loader: "html-loader",
        exclude: /node_modules/,
      },
      {
        test: /\.(ts|tsx)$/,
        loader: "ts-loader",
        exclude: /node_modules/,
        options: {
          transpileOnly: isDev,
        },
      },
      {
        test: /\.(js|jsx)$/,
        use: isDev
          ? [{ loader: "babel-loader" }]
          : [{ loader: "source-map-loader" }, { loader: "babel-loader" }],
        exclude: /node_modules/,
      },
    ],
  },
  resolve: {
    alias: {
      react: path.resolve("./node_modules/react"),
      "react-dom": path.resolve("./node_modules/react-dom"),
      "react/jsx-runtime": path.resolve("./node_modules/react/jsx-runtime"),
    },
    // Code extensions first; image/font extensions are only needed for explicit imports with extensions
    extensions: [".js", ".jsx", ".ts", ".tsx", ".css"],
  },
  plugins: [
    new webpack.ProgressPlugin(),
    new webpack.DefinePlugin({
      "process.env.SCREENITY_APP_BASE": JSON.stringify(
        process.env.SCREENITY_APP_BASE
      ),
      "process.env.SCREENITY_WEBSITE_BASE": JSON.stringify(
        process.env.SCREENITY_WEBSITE_BASE
      ),
      "process.env.SCREENITY_API_BASE_URL": JSON.stringify(
        process.env.SCREENITY_API_BASE_URL
      ),
      "process.env.SCREENITY_ENABLE_CLOUD_FEATURES": JSON.stringify(
        process.env.SCREENITY_ENABLE_CLOUD_FEATURES
      ),
      "process.env.MAX_RECORDING_DURATION": JSON.stringify(
        process.env.MAX_RECORDING_DURATION || 3600 // Default to 1 hour
      ),
      "process.env.RECORDING_WARNING_THRESHOLD": JSON.stringify(
        process.env.RECORDING_WARNING_THRESHOLD || 60 // Default to 1 minute
      ),
      "process.env.SCREENITY_DEV_MODE": JSON.stringify(
        process.env.SCREENITY_DEV_MODE || ""
      ),
    }),

    // Copy manifest and transform with package info
    new CopyWebpackPlugin({
      patterns: [
        {
          from: "src/manifest.json",
          to: path.join(__dirname, "build"),
          force: true,
          transform: (content) => {
            const manifest = {
              description: process.env.npm_package_description,
              version: process.env.npm_package_version,
              ...JSON.parse(content.toString()),
            };

            // Strip dev-only origins from prod builds. The
            // SCREENITY_USE_LOCAL_ENV escape hatch keeps them in for
            // build:local (prod-optimized bundle on localhost APIs).
            if (
              !isDev &&
              process.env.SCREENITY_USE_LOCAL_ENV !== "1" &&
              manifest.externally_connectable?.matches
            ) {
              manifest.externally_connectable.matches =
                manifest.externally_connectable.matches.filter(
                  (m) =>
                    !m.includes("localhost") && !m.includes("127.0.0.1"),
                );
            }

            return Buffer.from(JSON.stringify(manifest));
          },
        },
        {
          from: "src/schema.json",
          to: path.join(__dirname, "build/schema.json"),
          force: true,
        },
        {
          from: "src/assets/",
          to: path.join(__dirname, "build/assets"),
          force: true,
          filter: isBsBuild
            ? (resourcePath) =>
                !/vision_wasm.*\.wasm$/.test(resourcePath) &&
                !/\/videos\//.test(resourcePath) &&
                !/pin\.gif$/.test(resourcePath)
            : undefined,
        },
        {
          from: "src/_locales/",
          to: path.join(__dirname, "build/_locales"),
          force: true,
        },
        {
          from: "THIRD_PARTY_NOTICES.md",
          to: path.join(__dirname, "build/THIRD_PARTY_NOTICES.md"),
          force: true,
        },
      ],
    }),
    ...htmlPlugins,
  ],
};

if (isDev) {
  config.devtool = "cheap-module-source-map";
} else {
  config.optimization = {
    minimize: true,
    minimizer: [
      new TerserPlugin({
        extractComments: false,
        // Parallelize across CPU cores. Default is os.cpus().length-1
        // but being explicit makes the intent clear.
        parallel: true,
        terserOptions: {
          ecma: 2020,
          compress: {
            ecma: 2020,
            // Two compress passes catches more dead code than one
            // (DCE during pass 1 enables further inlining in pass 2).
            // Adds ~10-20% to build time, shaves 3-7% off bundle size.
            passes: 2,
            // strip log/debug/info in prod, keep warn/error for support.
            // Array form catches calls inside callbacks too.
            drop_console: ["log", "debug", "info"],
            pure_funcs: ["console.log", "console.debug", "console.info"],
          },
          mangle: {
            // Off; would mangle _-prefixed properties only. Measure
            // before flipping.
          },
          format: {
            // Drop all comments, including @preserve from deps.
            comments: false,
          },
        },
      }),
    ],
  };
}

module.exports = config;