initial checkin

lib/tasks/make_task.js

@@ -0,0 +1,22 @@
+const Task = require('./task');
+const TaskSipDecline = require('./sip_decline');
+const TaskDial = require('./dial');
+const errBadInstruction = new Error('invalid instruction payload');
+
+function makeTask(logger, opts) {
+  if (typeof opts !== 'object' || Array.isArray(opts)) throw errBadInstruction;
+  const keys = Object.keys(opts);
+  if (keys.length !== 1) throw errBadInstruction;
+  const name = keys[0];
+  const data = opts[name];
+  Task.validate(name, data);
+  switch (name) {
+    case TaskSipDecline.name: return new TaskSipDecline(logger, data);
+    case TaskDial.name: return new TaskDial(logger, data);
+  }
+
+  // should never reach
+  throw new Error(`invalid task ${name} (please update specs.json and make_task.js)`);
+}
+
+module.exports = makeTask;