add pause command

lib/tasks/make_task.js

@@ -30,6 +30,9 @@ function makeTask(logger, obj) {
     case TaskName.Play:
       const TaskPlay = require('./play');
       return new TaskPlay(logger, data);
+    case TaskName.Pause:
+      const TaskPause = require('./pause');
+      return new TaskPause(logger, data);
     case TaskName.Gather:
       const TaskGather = require('./gather');
       return new TaskGather(logger, data);

lib/tasks/pause.js

@@ -0,0 +1,26 @@
+const Task = require('./task');
+const {TaskName} = require('../utils/constants');
+
+class TaskPause extends Task {
+  constructor(logger, opts, parentTask) {
+    super(logger, opts);
+
+    this.length = this.data.length;
+  }
+
+  get name() { return TaskName.Pause; }
+
+  async exec(cs, ep) {
+    super.exec(cs);
+    this.timer = setTimeout(this.notifyTaskDone.bind(this), this.length * 1000);
+    await this.awaitTaskDone();
+  }
+
+  async kill() {
+    super.kill();
+    clearTimeout(this.timer);
+    this.notifyTaskDone();
+  }
+}
+
+module.exports = TaskPause;

lib/tasks/specs.json

@@ -108,6 +108,14 @@
       "url"
     ]
   },
+  "pause": {
+    "properties": {
+      "length": "number"
+    },
+    "required": [
+      "length"
+    ]
+  },
   "redirect": {
     "properties": {
       "action": "string",