port taskmanager to use tasks

src/tasks.js

@@ -10,6 +10,7 @@ exports = module.exports = {
 
     startTask: startTask,
     stopTask: stopTask,
+    stopAllTasks: stopAllTasks,
 
     removePrivateFields: removePrivateFields,
 
@@ -31,6 +32,7 @@ exports = module.exports = {
 };
 
 let assert = require('assert'),
+    async = require('async'),
     child_process = require('child_process'),
     DatabaseError = require('./databaseerror.js'),
     debug = require('debug')('box:tasks'),
@@ -169,6 +171,14 @@ function stopTask(id, callback) {
     callback(null);
 }
 
+function stopAllTasks(callback) {
+    assert.strictEqual(typeof callback, 'function');
+
+    async.eachSeries(Object.keys(gTasks), function (id, iteratorDone) {
+        stopTask(id, () => iteratorDone()); // ignore any error
+    }, callback);
+}
+
 function listByTypePaged(type, page, perPage, callback) {
     assert(typeof type === 'string' || type === null);
     assert.strictEqual(typeof page, 'number');