urldecode: cleanup, error handling

feat(modules/misc/urldecode): add urldecode command

See merge request Cynosphere/HiddenPhox!24

src/modules/misc/urldecode.js

@@ -0,0 +1,37 @@
+const Command = require("#lib/command.js");
+const {Icons} = require("#util/constants.js");
+
+const urldecode = new Command("urldecode");
+urldecode.category = "misc";
+urldecode.helpText = "Get information on a URL";
+urldecode.usage = "<url>";
+urldecode.callback = async function (msg, line, [urlString]) {
+  try {
+    const url = new URL(urlString);
+
+    const info = [
+      ["scheme", url.protocol],
+      ["username", url.username],
+      ["password", url.password],
+      ["host", url.host],
+      ["path", url.pathname],
+      ["hash", url.hash],
+    ];
+
+    return `\`\`\`py
+${info
+  .filter((kv) => kv[1].length > 0)
+  .map(([k, v]) => `${k} = ${v}`)
+  .join("\n")}
+
+${JSON.stringify(
+  url.searchParams,
+  (_, v) => (v instanceof URLSearchParams ? Object.fromEntries(v.entries()) : v),
+  "\t"
+)}
+\`\`\``;
+  } catch (err) {
+    return `${Icons.silk.error} Failed to decode URL:\n\`\`\`\n${err}\`\`\``;
+  }
+};
+hf.registerCommand(urldecode);