Add a basic class wrapping Node's repl

lib/repl.js

@@ -0,0 +1,55 @@
+"use strict";
+
+var util = require("util"),
+    createRepl = require("repl").start,
+    EventEmitter = require("events").EventEmitter;
+
+var _ = require("./utils/helpers");
+
+// asserts that a constructor was called with 'new'
+function classCallCheck(instance, constructor) {
+  if (!instance instanceof constructor) {
+    throw new TypeError("Cannot call a class as a function");
+  }
+}
+
+var Repl = module.exports = function Repl(opts, context) {
+  classCallCheck(this, Repl);
+
+  opts = opts || {};
+  context = context || {};
+
+  opts.prompt = opts.prompt || "repl > ";
+  opts.stdin = opts.stdin || process.stdin;
+  opts.stdout = opts.stdout || process.stdout;
+
+  this.repl = null;
+  this.options = opts;
+  this.context = context;
+};
+
+Repl.active = false;
+
+util.inherits(Repl, EventEmitter);
+
+Repl.prototype.start = function() {
+  // don't try to start two repls at once
+  if (Repl.active) {
+    return false;
+  }
+
+  Repl.active = true;
+
+  this.repl = createRepl(this.options);
+  _.extend(this.repl.context, this.context);
+
+  this.repl.on("exit", function() {
+    Repl.active = false;
+    this.emit("exit");
+  }.bind(this));
+
+  this.repl.on("reset", function(context) {
+    _.extend(context, this.context);
+    this.emit("reset");
+  }.bind(this));
+};