1 files changed, 156 insertions, 0 deletions
diff --git a/wp-includes/js/wp-util.js b/wp-includes/js/wp-util.js
new file mode 100644
index 0000000..c603bc6
--- /dev/null
+++ b/wp-includes/js/wp-util.js
@@ -0,0 +1,156 @@
+/**
+ * @output wp-includes/js/wp-util.js
+ */
+
+/* global _wpUtilSettings */
+
+/** @namespace wp */
+window.wp = window.wp || {};
+
+(function ($) {
+	// Check for the utility settings.
+	var settings = typeof _wpUtilSettings === 'undefined' ? {} : _wpUtilSettings;
+
+	/**
+	 * wp.template( id )
+	 *
+	 * Fetch a JavaScript template for an id, and return a templating function for it.
+	 *
+	 * @param {string} id A string that corresponds to a DOM element with an id prefixed with "tmpl-".
+	 *                    For example, "attachment" maps to "tmpl-attachment".
+	 * @return {function} A function that lazily-compiles the template requested.
+	 */
+	wp.template = _.memoize(function ( id ) {
+		var compiled,
+			/*
+			 * Underscore's default ERB-style templates are incompatible with PHP
+			 * when asp_tags is enabled, so WordPress uses Mustache-inspired templating syntax.
+			 *
+			 * @see trac ticket #22344.
+			 */
+			options = {
+				evaluate:    /<#([\s\S]+?)#>/g,
+				interpolate: /\{\{\{([\s\S]+?)\}\}\}/g,
+				escape:      /\{\{([^\}]+?)\}\}(?!\})/g,
+				variable:    'data'
+			};
+
+		return function ( data ) {
+			if ( ! document.getElementById( 'tmpl-' + id ) ) {
+				throw new Error( 'Template not found: ' + '#tmpl-' + id );
+			}
+			compiled = compiled || _.template( $( '#tmpl-' + id ).html(),  options );
+			return compiled( data );
+		};
+	});
+
+	/*
+	 * wp.ajax
+	 * ------
+	 *
+	 * Tools for sending ajax requests with JSON responses and built in error handling.
+	 * Mirrors and wraps jQuery's ajax APIs.
+	 */
+	wp.ajax = {
+		settings: settings.ajax || {},
+
+		/**
+		 * wp.ajax.post( [action], [data] )
+		 *
+		 * Sends a POST request to WordPress.
+		 *
+		 * @param {(string|Object)} action The slug of the action to fire in WordPress or options passed
+		 *                                 to jQuery.ajax.
+		 * @param {Object=}         data   Optional. The data to populate $_POST with.
+		 * @return {$.promise} A jQuery promise that represents the request,
+		 *                     decorated with an abort() method.
+		 */
+		post: function( action, data ) {
+			return wp.ajax.send({
+				data: _.isObject( action ) ? action : _.extend( data || {}, { action: action })
+			});
+		},
+
+		/**
+		 * wp.ajax.send( [action], [options] )
+		 *
+		 * Sends a POST request to WordPress.
+		 *
+		 * @param {(string|Object)} action  The slug of the action to fire in WordPress or options passed
+		 *                                  to jQuery.ajax.
+		 * @param {Object=}         options Optional. The options passed to jQuery.ajax.
+		 * @return {$.promise} A jQuery promise that represents the request,
+		 *                     decorated with an abort() method.
+		 */
+		send: function( action, options ) {
+			var promise, deferred;
+			if ( _.isObject( action ) ) {
+				options = action;
+			} else {
+				options = options || {};
+				options.data = _.extend( options.data || {}, { action: action });
+			}
+
+			options = _.defaults( options || {}, {
+				type:    'POST',
+				url:     wp.ajax.settings.url,
+				context: this
+			});
+
+			deferred = $.Deferred( function( deferred ) {
+				// Transfer success/error callbacks.
+				if ( options.success ) {
+					deferred.done( options.success );
+				}
+
+				if ( options.error ) {
+					deferred.fail( options.error );
+				}
+
+				delete options.success;
+				delete options.error;
+
+				// Use with PHP's wp_send_json_success() and wp_send_json_error().
+				deferred.jqXHR = $.ajax( options ).done( function( response ) {
+					// Treat a response of 1 as successful for backward compatibility with existing handlers.
+					if ( response === '1' || response === 1 ) {
+						response = { success: true };
+					}
+
+					if ( _.isObject( response ) && ! _.isUndefined( response.success ) ) {
+
+						// When handling a media attachments request, get the total attachments from response headers.
+						var context = this;
+						deferred.done( function() {
+							if (
+								action &&
+								action.data &&
+								'query-attachments' === action.data.action &&
+								deferred.jqXHR.hasOwnProperty( 'getResponseHeader' ) &&
+								deferred.jqXHR.getResponseHeader( 'X-WP-Total' )
+							) {
+								context.totalAttachments = parseInt( deferred.jqXHR.getResponseHeader( 'X-WP-Total' ), 10 );
+							} else {
+								context.totalAttachments = 0;
+							}
+						} );
+						deferred[ response.success ? 'resolveWith' : 'rejectWith' ]( this, [response.data] );
+					} else {
+						deferred.rejectWith( this, [response] );
+					}
+				}).fail( function() {
+					deferred.rejectWith( this, arguments );
+				});
+			});
+
+			promise = deferred.promise();
+			promise.abort = function() {
+				deferred.jqXHR.abort();
+				return this;
+			};
+
+			return promise;
+		}
+	};
+
+}(jQuery));