WordPress/wp-includes/js/media/models/attachment.js

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/*globals wp, _, Backbone */
/**
* wp.media.model.Attachment
*
* @class
* @augments Backbone.Model
*/
var $ = Backbone.$,
Attachment;
Attachment = Backbone.Model.extend({
/**
* Triggered when attachment details change
* Overrides Backbone.Model.sync
*
* @param {string} method
* @param {wp.media.model.Attachment} model
* @param {Object} [options={}]
*
* @returns {Promise}
*/
sync: function( method, model, options ) {
// If the attachment does not yet have an `id`, return an instantly
// rejected promise. Otherwise, all of our requests will fail.
if ( _.isUndefined( this.id ) ) {
return $.Deferred().rejectWith( this ).promise();
}
// Overload the `read` request so Attachment.fetch() functions correctly.
if ( 'read' === method ) {
options = options || {};
options.context = this;
options.data = _.extend( options.data || {}, {
action: 'get-attachment',
id: this.id
});
return wp.media.ajax( options );
// Overload the `update` request so properties can be saved.
} else if ( 'update' === method ) {
// If we do not have the necessary nonce, fail immeditately.
if ( ! this.get('nonces') || ! this.get('nonces').update ) {
return $.Deferred().rejectWith( this ).promise();
}
options = options || {};
options.context = this;
// Set the action and ID.
options.data = _.extend( options.data || {}, {
action: 'save-attachment',
id: this.id,
nonce: this.get('nonces').update,
post_id: wp.media.model.settings.post.id
});
// Record the values of the changed attributes.
if ( model.hasChanged() ) {
options.data.changes = {};
_.each( model.changed, function( value, key ) {
options.data.changes[ key ] = this.get( key );
}, this );
}
return wp.media.ajax( options );
// Overload the `delete` request so attachments can be removed.
// This will permanently delete an attachment.
} else if ( 'delete' === method ) {
options = options || {};
if ( ! options.wait ) {
this.destroyed = true;
}
options.context = this;
options.data = _.extend( options.data || {}, {
action: 'delete-post',
id: this.id,
_wpnonce: this.get('nonces')['delete']
});
return wp.media.ajax( options ).done( function() {
this.destroyed = true;
}).fail( function() {
this.destroyed = false;
});
// Otherwise, fall back to `Backbone.sync()`.
} else {
/**
* Call `sync` directly on Backbone.Model
*/
return Backbone.Model.prototype.sync.apply( this, arguments );
}
},
/**
* Convert date strings into Date objects.
*
* @param {Object} resp The raw response object, typically returned by fetch()
* @returns {Object} The modified response object, which is the attributes hash
* to be set on the model.
*/
parse: function( resp ) {
if ( ! resp ) {
return resp;
}
resp.date = new Date( resp.date );
resp.modified = new Date( resp.modified );
return resp;
},
/**
* @param {Object} data The properties to be saved.
* @param {Object} options Sync options. e.g. patch, wait, success, error.
*
* @this Backbone.Model
*
* @returns {Promise}
*/
saveCompat: function( data, options ) {
var model = this;
// If we do not have the necessary nonce, fail immeditately.
if ( ! this.get('nonces') || ! this.get('nonces').update ) {
return $.Deferred().rejectWith( this ).promise();
}
return wp.media.post( 'save-attachment-compat', _.defaults({
id: this.id,
nonce: this.get('nonces').update,
post_id: wp.media.model.settings.post.id
}, data ) ).done( function( resp, status, xhr ) {
model.set( model.parse( resp, xhr ), options );
});
}
}, {
/**
* Create a new model on the static 'all' attachments collection and return it.
*
* @static
* @param {Object} attrs
* @returns {wp.media.model.Attachment}
*/
create: function( attrs ) {
var Attachments = require( './attachments.js' );
return Attachments.all.push( attrs );
},
/**
* Create a new model on the static 'all' attachments collection and return it.
*
* If this function has already been called for the id,
* it returns the specified attachment.
*
* @static
* @param {string} id A string used to identify a model.
* @param {Backbone.Model|undefined} attachment
* @returns {wp.media.model.Attachment}
*/
get: _.memoize( function( id, attachment ) {
var Attachments = require( './attachments.js' );
return Attachments.all.push( attachment || { id: id } );
})
});
module.exports = Attachment;