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packages_ember-droplet_ember-droplet-mixin.js.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>packages/ember-droplet/ember-droplet-mixin.js - ember-droplet</title>
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<em>API Docs for: </em>
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<li><a href="../classes/EmberDropletController.html">EmberDropletController</a></li>
</ul>
<ul id="api-modules" class="apis modules">
<li><a href="../modules/App.html">App</a></li>
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<h1 class="file-heading">File: packages/ember-droplet/ember-droplet-mixin.js</h1>
<div class="file">
<pre class="code prettyprint linenums">
(function($window, $ember, $jQuery) {
"use strict";
/**
* @module App
* @class EmberDropletController
* @type Ember.Mixin
* @extends Ember.Mixin
*/
$window.DropletController = $ember.Mixin.create({
/**
* @property mimeTypes
* @type {Array}
*/
mimeTypes: ['image/jpeg', 'image/jpg', 'image/gif', 'image/png', 'text/plain'],
/**
* @property requestHeaders
* @type {Object}
* Contains a list of headers to be included in the request made by
* uploadAllFiles()
*/
requestHeaders: {},
/**
* @property postData
* @type {Object}
* Contains a dictionary of extra POST data to be included in the
* request made by uploadAllFiles()
*/
postData: {},
/**
* @property files
* @type {Array}
* @default []
* Contains a list of files, both valid, deleted, and invalid.
*/
files: [],
/**
* @property uploadStatus
* @type {Object}
*/
uploadStatus: { uploading: false, percentComplete: 0, error: false },
/**
* @constructor
* @method init
* Clears the file array for each instantiation.
* @return {void}
*/
init: function() {
$ember.set(this, 'files', []);
this._super();
},
/**
* @property actions
* @type {Object}
*/
actions: {
/**
* @method addValidFile
* @param file {File}
* Adds a valid file to the collection.
* @return {Object}
*/
addValidFile: function(file) {
return this._addFile(file, true);
},
/**
* @method addInvalidFile
* @param file {File}
* Adds an invalid file to the collection.
* @return {Object}
*/
addInvalidFile: function(file) {
return this._addFile(file, false);
},
/**
* @method deleteFile
* @param file
* Deletes a file from the collection.
* @return {Object}
*/
deleteFile: function(file) {
$ember.set(file, 'deleted', true);
return file;
},
/**
* @method clearAllFiles
* Clears all of the files from the collection.
* @return {void}
*/
clearAllFiles: function() {
$ember.set(this, 'files', []);
},
/**
* @method uploadAllFiles
* Uploads all of the files that haven't been uploaded yet, but are valid files.
* @return {Object|Boolean} jQuery promise, or false if there are no files to upload.
*/
uploadAllFiles: function() {
if ($ember.get(this, 'validFiles').length === 0) {
// Determine if there are even files to upload.
return false;
}
// Find the URL, set the uploading status, and create our promise.
var url = $ember.get(this, 'dropletUrl'),
deferred = new $jQuery.Deferred(),
postData = this.get('postData'),
requestHeaders = this.get('requestHeaders');
$ember.set(this, 'uploadStatus.uploading', true);
$ember.set(this, 'uploadStatus.error', false);
// Assert that we have the URL specified in the controller that implements the mixin.
$ember.assert('You must specify the `dropletUrl` parameter in order to upload files.', !!url);
// Create a new XHR request object.
var request = new $window.XMLHttpRequest();
request.open('post', url, true);
// Create a new form data instance.
var formData = new $window.FormData();
// Iterate over each file, and append it to the form data.
$ember.EnumerableUtils.forEach($ember.get(this, 'validFiles'), function(file) {
formData.append('files', file.file);
}, this);
// Add any extra POST data specified in the controller
for (var index in postData) {
if (postData.hasOwnProperty(index)) {
formData.append(index, postData[index]);
}
}
// Add all of the event listeners.
this._addProgressListener(request.upload);
this._addSuccessListener(request.upload, deferred);
this._addErrorListener(request.upload, deferred);
// Resolve the promise when we've finished uploading all the files.
request.onreadystatechange = function() {
if (request.readyState === 4) {
var files = $window.JSON.parse(request.responseText);
deferred.resolve(files);
}
};
// Set the request size, and then we can upload the files!
request.setRequestHeader('X-File-Size', this._getSize());
// Assign any request headers specified in the controller.
for (index in requestHeaders) {
if (requestHeaders.hasOwnProperty(index)) {
request.setRequestHeader(index, requestHeaders[index]);
}
}
request.send(formData);
// Return the promise.
return deferred.promise();
}
},
/**
* @property validFiles
* Finds a list of files that aren't deleted, and are of a valid MIME type.
* @return {Array}
*/
validFiles: $ember.computed(function() {
return this._filesByProperties({ valid: true, deleted: false, uploaded: false });
}).property('files.length', 'files.@each.deleted', 'files.@each.uploaded'),
/**
* @property invalidFiles
* Finds a list of files that have an unsupported MIME type.
* @return {Array}
*/
invalidFiles: $ember.computed(function() {
return this._filesByProperties({ valid: false });
}).property('files.length', 'files.@each.deleted'),
/**
* @property uploadedFiles
* Finds a list of files that have been successfully uploaded.
* @return {Array}
*/
uploadedFiles: $ember.computed(function() {
return this._filesByProperties({ uploaded: true });
}).property('files.length', 'files.@each.uploaded'),
/**
* @property deletedFiles
* Finds a list of files that have been deleted by the user.
* @return {Array}
*/
deletedFiles: $ember.computed(function() {
return this._filesByProperties({ deleted: true });
}).property('files.length', 'files.@each.deleted'),
/**
* @method _filesByProperties
* @param maps {Object}
* Accepts a map of properties that each file must have.
* @return {Array}
* @private
*/
_filesByProperties: function(maps) {
// Iterate over each of the files.
return $ember.get(this, 'files').filter(function(file) {
for (var property in maps) {
if (maps.hasOwnProperty(property)) {
// If the current property doesn't match what we're after from the map,
// then the file is invalid.
if (file[property] !== maps[property]) {
return false;
}
}
}
// Voila! We have a good file that matches our criteria.
return true;
});
},
/**
* @method _getSize
* Determine the size of the request.
* @return {Number}
* @private
*/
_getSize: function() {
var size = 0;
// Iterate over all of the files to determine the size of all valid files.
$ember.EnumerableUtils.forEach($ember.get(this, 'validFiles'), function(file) {
size += file.file.size;
});
return size;
},
/**
* @method _addSuccessListener
* @param request
* @private
*/
_addSuccessListener: function(request) {
// Once the files have been successfully uploaded.
request.addEventListener('load', function() {
// Set the `uploaded` parameter to true once we've successfully // uploaded the files.
$ember.EnumerableUtils.forEach($ember.get(this, 'validFiles'), function(file) {
$ember.set(file, 'uploaded', true);
});
// We want to revert the upload status.
$ember.set(this, 'uploadStatus.uploading', false);
}.bind(this), false);
},
/**
* @method _addErrorListener
* @param request
* @param [deferred = null]
* @return {void}
* @private
*/
_addErrorListener: function(request, deferred) {
request.addEventListener('error', function() {
// As an error occurred, we need to revert everything.
$ember.set(this, 'uploadStatus.uploading', false);
$ember.set(this, 'uploadStatus.error', true);
if (deferred) {
// Reject the promise if we have one.
deferred.reject();
}
}.bind(this));
},
/**
* @method _addProgressListener
* @param request
* @return {void}
* @private
*/
_addProgressListener: function(request) {
request.addEventListener('progress', function (event) {
if (!event.lengthComputable) {
// There's not much we can do if the request is not computable.
return;
}
// Calculate the percentage remaining.
var percentageLoaded = (event.loaded / this._getSize()) * 100;
$ember.set(this, 'uploadStatus.percentComplete', Math.round(percentageLoaded));
}.bind(this), false);
},
/**
* @method _addFile
* @param file {File}
* @param valid {Boolean}
* Adds a file based on whether it's valid or invalid.
* @return {Object}
* @private
*/
_addFile: function(file, valid) {
// Extract the file's extension which allows us to style accordingly.
var className = 'extension-%@'.fmt(file.name.match(/\.(.+)$/i)[1]).toLowerCase();
// Create the record with its default parameters, and then add it to the collection.
var record = { file: file, valid: valid, uploaded: false, deleted: false, className: className };
$ember.get(this, 'files').pushObject(record);
// Voila!
return record;
}
});
})(window, window.Ember, window.jQuery);
</pre>
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