rewrite

src/cli.js

@@ -0,0 +1,59 @@
+import process from "node:process";
+
+export const VALID_THEMES = [
+  "light",
+  "dark",
+  "sepia",
+  "groove-dark",
+  "solarized-light",
+  "solarized-dark",
+  "nord-light",
+  "nord-dark",
+];
+
+export function parseArgs() {
+  const args = process.argv.slice(2);
+  const url = args[0];
+  const opts = { theme: null, css: null, prefs: null, output: null };
+  for (let i = 1; i < args.length; i++) {
+    if (args[i] === "--theme" && args[i + 1]) opts.theme = args[++i];
+    else if (args[i] === "--css" && args[i + 1]) opts.css = args[++i];
+    else if (args[i] === "--prefs" && args[i + 1]) opts.prefs = args[++i];
+    else if (args[i] === "--output" && args[i + 1]) opts.output = args[++i];
+  }
+  if (
+    !opts.theme &&
+    args[1] &&
+    !args[1].startsWith("-") &&
+    VALID_THEMES.includes(args[1])
+  ) {
+    opts.theme = args[1];
+  }
+  return { url, opts };
+}
+
+export function printUsage() {
+  console.error("Usage: node src/index.js <URL> [theme] [options]");
+  console.error("");
+  console.error("Options:");
+  console.error(
+    "  --theme <theme>    Reader View theme (" + VALID_THEMES.join(", ") + ")",
+  );
+  console.error("  --css <path>       Path to custom CSS file");
+  console.error("  --prefs <path>     Path to extension preferences JSON");
+  console.error(
+    "  --output <path>    Output file path (default: ./output/<title>.pdf)",
+  );
+  console.error("");
+  console.error("Examples:");
+  console.error("  node src/index.js <URL>");
+  console.error("  node src/index.js <URL> dark --css config/rules.css");
+  console.error("");
+  console.error("IMPORTANT: npm start consumes --flags as npm config.");
+  console.error("Use node directly or add -- before flags:");
+  console.error(
+    "  node src/index.js <URL> --theme dark --css config/rules.css",
+  );
+  console.error("  npm start -- <URL> --theme dark --css config/rules.css");
+  console.error("");
+}