1 files changed, 49 insertions, 0 deletions
diff --git a/library/sw-controller.js b/library/sw-controller.js
new file mode 100644
index 000000000..d5065a933
--- /dev/null
+++ b/library/sw-controller.js
@@ -0,0 +1,49 @@
+const EventEmitter = require('events')
+
+module.exports = class serviceWorkerController extends EventEmitter{
+  constructor (opts) {
+    super()
+    this.fileName = opts.fileName
+    this.registerOpts = opts.registerOpts
+    this.serviceWorker = navigator.serviceWorker
+  }
+
+
+  startWorker () {
+    // check to see if their is a preregistered service worker
+    if (!this.serviceWorker.controller) {
+      return Promise.resolve(this.registerWorker())
+    } else {
+      return Promise.resolve(this.serviceWorker.ready)
+    }
+  }
+
+  registerWorker () {
+    return this.serviceWorker.register(this.fileName, this.registerOpts)
+    .then(sw => {
+      return sw
+    })
+  }
+
+  syncSW (registeredSW) {
+    return registeredSW.sync.register('sync')
+    .then(() => {
+      console.log('sync')
+    })
+  }
+
+  sendMessage (message) {
+    const self = this
+    return new Promise((resolve, reject) => {
+       var messageChannel = new MessageChannel()
+       messageChannel.port1.onmessage = (event) => {
+         if (event.data.err) {
+           reject(event.data.error)
+         } else {
+           resolve(event.data.data)
+         }
+       }
+      self.serviceWorker.controller.postMessage(message, [messageChannel.port2])
+    })
+  }
+}