/**

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* Thin jQuery.ajax wrapper for WP REST API requests.

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*

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* Currently only applies to requests that do not use the `wp-api.js` Backbone

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* client library, though this may change. Serves several purposes:

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*

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* - Allows overriding these requests as needed by customized WP installations.

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* - Sends the REST API nonce as a request header.

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* - Allows specifying only an endpoint namespace/path instead of a full URL.

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*

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* @since 4.9.0

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* @since 5.6.0 Added overriding of the "PUT" and "DELETE" methods with "POST".

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* Added an "application/json" Accept header to all requests.

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* @output wp-includes/js/api-request.js

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*/

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( function( $ ) {

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var wpApiSettings = window.wpApiSettings;

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function apiRequest( options ) {

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options = apiRequest.buildAjaxOptions( options );

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return apiRequest.transport( options );

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}

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apiRequest.buildAjaxOptions = function( options ) {

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var url = options.url;

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var path = options.path;

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var method = options.method;

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var namespaceTrimmed, endpointTrimmed, apiRoot;

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var headers, addNonceHeader, addAcceptHeader, headerName;

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if (

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typeof options.namespace === 'string' &&

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typeof options.endpoint === 'string'

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) {

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namespaceTrimmed = options.namespace.replace( /^\/|\/$/g, '' );

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endpointTrimmed = options.endpoint.replace( /^\//, '' );

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if ( endpointTrimmed ) {

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path = namespaceTrimmed + '/' + endpointTrimmed;

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} else {

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path = namespaceTrimmed;

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}

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}

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if ( typeof path === 'string' ) {

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apiRoot = wpApiSettings.root;

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path = path.replace( /^\//, '' );

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// API root may already include query parameter prefix

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// if site is configured to use plain permalinks.

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if ( 'string' === typeof apiRoot && -1 !== apiRoot.indexOf( '?' ) ) {

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path = path.replace( '?', '&' );

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}

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url = apiRoot + path;

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}

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// If ?_wpnonce=... is present, no need to add a nonce header.

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addNonceHeader = ! ( options.data && options.data._wpnonce );

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addAcceptHeader = true;

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headers = options.headers || {};

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for ( headerName in headers ) {

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if ( ! headers.hasOwnProperty( headerName ) ) {

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continue;

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}

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// If an 'X-WP-Nonce' or 'Accept' header (or any case-insensitive variation

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// thereof) was specified, no need to add the header again.

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switch ( headerName.toLowerCase() ) {

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case 'x-wp-nonce':

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addNonceHeader = false;

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break;

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case 'accept':

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addAcceptHeader = false;

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break;

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}

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}

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if ( addNonceHeader ) {

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// Do not mutate the original headers object, if any.

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headers = $.extend( {

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'X-WP-Nonce': wpApiSettings.nonce

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}, headers );

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}

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if ( addAcceptHeader ) {

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headers = $.extend( {

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'Accept': 'application/json, */*;q=0.1'

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}, headers );

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}

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if ( typeof method === 'string' ) {

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method = method.toUpperCase();

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if ( 'PUT' === method || 'DELETE' === method ) {

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headers = $.extend( {

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'X-HTTP-Method-Override': method

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}, headers );

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method = 'POST';

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}

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}

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// Do not mutate the original options object.

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options = $.extend( {}, options, {

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headers: headers,

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url: url,

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method: method

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} );

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delete options.path;

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delete options.namespace;

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delete options.endpoint;

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return options;

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};

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apiRequest.transport = $.ajax;

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/** @namespace wp */

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window.wp = window.wp || {};

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window.wp.apiRequest = apiRequest;

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} )( jQuery );

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