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firebase-storage-upload-task.html
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firebase-storage-upload-task.html
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<!--
@license
Copyright 2016 Google Inc. All Rights Reserved.
Use of this source code is governed by a BSD-style
license that can be found in the LICENSE file or at
https://github.com/firebase/polymerfire/blob/master/LICENSE
-->
<link rel="import" href="../polymer/polymer.html">
<link rel="import" href="firebase-storage-behavior.html">
<script>
(function(){
'use strict';
/**
* The firebase-storage-upload-task element is an easy way to track upload tasks made
* by the firebase-storage-multiupload or the firebase-storage-ref
*
* For example:
*
* <firebase-storage-upload-task
* task="[[task]]"
* bytes-transferred="{{bytesTransferred}}"
* total-bytes="{{totalBytes}}"
* state="{{state}}"
* download-url="{{downloadUrl}}"
* metadata="{{metadata}}"
* path="{{path}}"></firebase-storage-upload-task>
*
* It has to get the upload task from either the firebase-storage-multiupload or firebase-storage-ref
* and produces data like bytes-transferred, total-bytes, states, etc...
*
* You can also use this element to cancel, pause, and resume a task.
*
*
* `<firebase-storage>` needs some information about how to talk to Firebase.
* Set this configuration by adding a `<firebase-app>` element anywhere in your
* app.
*/
Polymer({
is: 'firebase-storage-upload-task',
properties: {
/**
* The upload task that is being tracked
*/
task: {
type: Object,
value: null,
observer: '_taskChanged'
},
/**
* Number of bytes transferred
*/
bytesTransferred: {
type: Number,
notify: true
},
/**
* Total number of bytes of the file
*/
totalBytes: {
type: Number,
notify: true
},
/**
* The upload task's state
*/
state: {
type: Object,
notify: true
},
/**
* The download url of the file
*/
downloadUrl: {
type: String,
notify: true
},
/**
* The metadata of the file
*/
metadata: {
type: Object,
notify: true
},
/**
* The firebase storage path of the file
*/
path: {
type: String,
notify: true
},
/**
* The current snapshot of the task
*/
snapshot: {
type: Object,
notify: true
}
},
behaviors: [
Polymer.FirebaseStorageBehavior
],
/**
* @override
*/
get zeroValue() {
return [];
},
_updateProperties: function(snapshot) {
this.state = snapshot.state;
this.totalBytes = snapshot.totalBytes;
this.bytesTransferred = snapshot.bytesTransferred;
this.downloadUrl = snapshot.downloadURL;
this.metadata = snapshot.metadata;
this.path = snapshot.ref.fullPath;
this.snapshot = snapshot;
},
_taskChanged: function(task) {
this._updateProperties(task.snapshot);
task.on(firebase.storage.TaskEvent.STATE_CHANGED,
this._updateProperties.bind(this), function(error) {
this._updateProperties(task.snapshot)
this.fire('error', error, { bubble: false});
}.bind(this), function() {
this._updateProperties(task.snapshot)
}.bind(this));
},
/**
* Cancels the upload
*/
cancel: function() {
return this.task ? this.task.cancel() : new Promise(function(resolve, reject) {
reject('No task included')
});
},
/**
* Resumes a paused upload
*/
resume: function() {
return this.task ? this.task.resume() : new Promise(function(resolve, reject) {
reject('No task included')
});
},
/**
* Pauses the upload
*/
pause: function() {
return this.task ? this.task.pause() : new Promise(function(resolve, reject) {
reject('No task included')
});
}
});
})()
</script>