feat: fully managed, encrypted staking keys

[crowdnode.js/.git] / bin / _prompt.js

diff --git a/bin/_prompt.js b/bin/_prompt.js
new file mode 100644 (file)
index 0000000..b169ac5
--- /dev/null
+++ b/bin/_prompt.js
@@ -0,0 +1,63 @@
+"use strict";
+
+let Prompt = module.exports;
+
+/**
+ * @param {String} query
+ * @param {Object} [options]
+ * @param {Array<String>} [options.choices]
+ * @param {Boolean} [options.mask]
+ */
+Prompt.prompt = async function (query, options) {
+  let Readline = require("readline");
+
+  let completer;
+  if (options?.choices) {
+    /**
+     * @param {String} line
+     */
+    completer = function (line) {
+      let completions = options.choices || [];
+      let hits = completions.filter(function (c) {
+        return c.startsWith(line);
+      });
+      if (!hits.length) {
+        hits = completions;
+      }
+      return [hits, line];
+    };
+  }
+
+  let rl = Readline.createInterface({
+    input: process.stdin,
+    output: process.stdout,
+    completer,
+  });
+
+  if (options?.mask) {
+    //@ts-ignore
+    rl.input.on("keypress", function (_char, _modifiers) {
+      // _char = "e"
+      // _modifiers = { sequence: 'e', name: 'e', ctrl: false, meta: false, shift: false }
+      let len = rl.line.length;
+      // place cursor at the beginning of the prompt
+      //@ts-ignore
+      Readline.moveCursor(rl.output, -len, 0);
+      // clear right of the cursor / prompt
+      //@ts-ignore
+      Readline.clearLine(rl.output, 1);
+      // mask with "*"
+      //@ts-ignore
+      rl.output.write("*".repeat(len));
+    });
+  }
+
+  let answer = await new Promise(function (resolve) {
+    return rl.question(query ?? "", resolve);
+  });
+
+  // TODO what if we need control over closing?
+  // ex: Promise.race([getPrompt, getFsEvent, getSocketEvent]);
+  rl.close();
+  return answer;
+};