Ticket #38342: 38342-6.diff

src/wp-admin/css/dashboard.css

@@ -518 +518 @@
         resize: none;
 }
 
+#quick-press.is-saving .spinner {
+        visibility: inherit;
+}
+
 /* Dashboard Quick Draft - Drafts list */
 
 .js #dashboard_quick_press .drafts {
@@ -541 +545 @@
         margin: 0 12px;
 }
 
+#dashboard_quick_press .drafts ul.is-placeholder li {
+        padding: 3px 0;
+        color: transparent;
+}
+
+@keyframes loading-fade {
+        0% { opacity: .5; }
+        50% { opacity: 1; }
+        100% { opacity: .5; }
+}
+
+#dashboard_quick_press .drafts ul.is-placeholder li:before,
+#dashboard_quick_press .drafts ul.is-placeholder li:after {
+        content: '';
+        display: block;
+        height: 13px;
+        background: #eee;
+        animation: loading-fade 1.6s ease-in-out infinite;
+}
+
+#dashboard_quick_press .drafts ul.is-placeholder li:before {
+        margin-bottom: 5px;
+        width: 40%;
+}
+
+#dashboard_quick_press .drafts ul.is-placeholder li:after {
+        width: 80%;
+}
+
 #dashboard_quick_press .drafts li {
         margin-bottom: 1em;
 }
+
+#dashboard_quick_press .drafts li.is-new {
+        background-color: #fffbe5;
+}
+
 #dashboard_quick_press .drafts li time {
         color: #72777c;
 }

src/wp-admin/includes/dashboard.php

@@ -491 +491 @@
         $post_ID = (int) $post->ID;
 ?>
 
-        <form name="post" action="<?php echo esc_url( admin_url( 'post.php' ) ); ?>" method="post" id="quick-press" class="initial-form hide-if-no-js">
-
-                <?php if ( $error_msg ) : ?>
-                <div class="error"><?php echo $error_msg; ?></div>
-                <?php endif; ?>
+        <form name="post" method="post" id="quick-press" class="initial-form hide-if-no-js">
 
                 <div class="input-text-wrap" id="title-wrap">
-                        <label class="screen-reader-text prompt" for="title" id="title-prompt-text">
+                        <label class="prompt" for="title" id="title-prompt-text">
 
                                 <?php
                                 /** This filter is documented in wp-admin/edit-form-advanced.php */
                                 echo apply_filters( 'enter_title_here', __( 'Title' ), $post );
                                 ?>
                         </label>
-                        <input type="text" name="post_title" id="title" autocomplete="off" />
+                        <input type="text" name="title" id="title" autocomplete="off" />
                 </div>
 
                 <div class="textarea-wrap" id="description-wrap">
-                        <label class="screen-reader-text prompt" for="content" id="content-prompt-text"><?php _e( 'What&#8217;s on your mind?' ); ?></label>
+                        <label class="prompt" for="content" id="content-prompt-text"><?php _e( 'What&#8217;s on your mind?' ); ?></label>
                         <textarea name="content" id="content" class="mceEditor" rows="3" cols="15" autocomplete="off"></textarea>
                 </div>
-
                 <p class="submit">
-                        <input type="hidden" name="action" id="quickpost-action" value="post-quickdraft-save" />
-                        <input type="hidden" name="post_ID" value="<?php echo $post_ID; ?>" />
-                        <input type="hidden" name="post_type" value="post" />
-                        <?php wp_nonce_field( 'add-post' ); ?>
+                        <div class="error inline" style="display: none;"><p></p></div>
+                        <div class="spinner no-float"></div>
                         <?php submit_button( __( 'Save Draft' ), 'primary', 'save', false, array( 'id' => 'save-post' ) ); ?>
                         <br class="clear" />
                 </p>
 
         </form>
         <?php
-        wp_dashboard_recent_drafts();
+        echo wp_dashboard_get_recent_drafts_js_template();
 }
 
 /**
@@ -581 +574 @@
         }
         echo "</ul>\n</div>";
 }
+/**
+ * Get the HTML template for the Quick Draft recent posts.
+ *
+ * @since 4.8.0
+ *
+ * @return string The template HTML.
+ */
+function wp_dashboard_get_recent_drafts_js_template() {
+        $template_html  = '<div id="quick-press-drafts" class="drafts">';
+        $template_html .= '<p class="view-all" style="display: none;"><a href="' . esc_url( admin_url( 'edit.php?post_status=draft' ) ) . '" aria-label="' . __( 'View all drafts' ) . '">' . _x( 'View all', 'drafts' ) . "</a></p>\n";
+        $template_html .= '<h2 class="hide-if-no-js">' . __( 'Drafts' ) . "</h2>\n";
+        $template_html .= '<script id="tmpl-item-quick-press-draft" type="text/template">';
+        $template_html .= '<div class="draft-title"><a href="{{{ data.edit_link }}}" aria-label="' . esc_attr( __( 'Edit Post' ) ) . '">{{ data.title }}</a>';
+        $template_html .= '<time datetime="{{ data.date.raw }}">{{ data.date.rendered }}</time></div>';
+        $template_html .= '{{{ data.content }}}';
+        $template_html .= '</script>';
+        $template_html .= '<ul class="drafts-list is-placeholder">';
+
+        // Add a placeholder for each draft.
+        $query_args = array(
+                'post_type'      => 'post',
+                'post_status'    => 'draft',
+                'author'         => get_current_user_id(),
+                'posts_per_page' => 4,
+                'fields'         => 'ids',
+                'no_found_rows'  => true,
+        );
+
+        /** This filter is documented in wp-admin/includes/dashboard.php */
+        $query_args = apply_filters( 'dashboard_recent_drafts_query_args', $query_args );
+
+        $count_query = new WP_Query( $query_args );
+        if ( $count_query->have_posts()  ) {
+                for ( $i = 0; $i < ($count_query->post_count ? $count_query->post_count : 4 ); $i++ ) {
+                        $template_html .= '<li><span class="screen-reader-text">' . esc_html( __( 'Loading…' ) ) . '</span></li>';
+                }
+        }
+        $template_html .= '</ul></div>';
+
+        return $template_html;
+}
 
 /**
  * Outputs a row for the Recent Comments widget.

src/wp-admin/js/dashboard.js

@@ -1 @@
-/* global pagenow, ajaxurl, postboxes, wpActiveEditor:true */
-var ajaxWidgets, ajaxPopulateWidgets, quickPressLoad;
+/* global _, wp, quickPress, pagenow, ajaxurl, postboxes, wpActiveEditor:true */
+var ajaxWidgets, ajaxPopulateWidgets;
 
 jQuery(document).ready( function($) {
         var welcomePanel = $( '#welcome-panel' ),
@@ -61 +61 @@
 
         postboxes.add_postbox_toggles(pagenow, { pbshow: ajaxPopulateWidgets } );
 
-        /* QuickPress */
-        quickPressLoad = function() {
-                var act = $('#quickpost-action'), t;
-
-                $( '#quick-press .submit input[type="submit"], #quick-press .submit input[type="reset"]' ).prop( 'disabled' , false );
-
-                t = $('#quick-press').submit( function( e ) {
-                        e.preventDefault();
-                        $('#dashboard_quick_press #publishing-action .spinner').show();
-                        $('#quick-press .submit input[type="submit"], #quick-press .submit input[type="reset"]').prop('disabled', true);
-
-                        $.post( t.attr( 'action' ), t.serializeArray(), function( data ) {
-                                // Replace the form, and prepend the published post.
-                                $('#dashboard_quick_press .inside').html( data );
-                                $('#quick-press').removeClass('initial-form');
-                                quickPressLoad();
-                                highlightLatestPost();
-                                $('#title').focus();
-                        });
-
-                        function highlightLatestPost () {
-                                var latestPost = $('.drafts ul li').first();
-                                latestPost.css('background', '#fffbe5');
-                                setTimeout(function () {
-                                        latestPost.css('background', 'none');
-                                }, 1000);
-                        }
-                } );
-
-                $('#publish').click( function() { act.val( 'post-quickpress-publish' ); } );
-
-                $('#title, #tags-input, #content').each( function() {
-                        var input = $(this), prompt = $('#' + this.id + '-prompt-text');
-
-                        if ( '' === this.value ) {
-                                prompt.removeClass('screen-reader-text');
-                        }
-
-                        prompt.click( function() {
-                                $(this).addClass('screen-reader-text');
-                                input.focus();
-                        });
-
-                        input.blur( function() {
-                                if ( '' === this.value ) {
-                                        prompt.removeClass('screen-reader-text');
-                                }
-                        });
-
-                        input.focus( function() {
-                                prompt.addClass('screen-reader-text');
-                        });
-                });
-
-                $('#quick-press').on( 'click focusin', function() {
-                        wpActiveEditor = 'content';
-                });
-
-                autoResizeTextarea();
-        };
-        quickPressLoad();
-
         $( '.meta-box-sortables' ).sortable( 'option', 'containment', '#wpwrap' );
 
         function autoResizeTextarea() {
@@ -186 +124 @@
                 });
         }
 
+        autoResizeTextarea();
+
+});
+
+wp.api.loadPromise.done( function( endpoint ) {
+        var $ = jQuery,
+                QuickPress = {},
+                draftsCollection;
+
+        /**
+         * Models
+         */
+
+        QuickPress.Models = {};
+
+        QuickPress.Models.Draft = wp.api.models.Post.extend( {
+                url: endpoint.get( 'apiRoot' ) + 'wp-admin/v1/quick-drafts',
+
+                validate: function( attributes ) {
+                        if ( ! attributes.title && ! attributes.content ) {
+                                return 'no-content';
+                        }
+                }
+        } );
+
+        /**
+         * Collections
+         */
+
+        QuickPress.Collections = {};
+
+        QuickPress.Collections.Drafts = wp.api.collections.Posts.extend( {
+                model: QuickPress.Models.Draft,
+
+                url: QuickPress.Models.Draft.prototype.url,
+
+                comparator: function( a, b ) {
+                        // Sort by date descending, date is an ISO8601 string and can be
+                        // compared lexicographically
+                        return a.get( 'date' ).raw < b.get( 'date' ).raw;
+                }
+        } );
+
+        /**
+         * Collections
+         */
+
+        QuickPress.Views = {};
+
+        QuickPress.Views.Form = wp.Backbone.View.extend( {
+                events: {
+                        'click :input': 'hidePromptAndFocus',
+                        'focus :input': 'hidePrompt',
+                        'blur :input': 'showPrompt',
+                        reset: 'showAllPrompts',
+                        click: 'setActiveEditor',
+                        focusin: 'setActiveEditor',
+                        submit: 'submit'
+                },
+
+                initialize: function() {
+                        this.showAllPrompts();
+
+                        this.listenTo( this.model, 'invalid', this.render );
+                        this.listenTo( this.model, 'error', this.showSyncError );
+                },
+
+                togglePrompt: function( element, visible ) {
+                        var $input = $( element ),
+                                hasContent = $input.val().length > 0;
+
+                        $( element ).siblings( '.prompt' ).toggleClass( 'screen-reader-text', ! visible || hasContent );
+                },
+
+                showAllPrompts: function() {
+                        this.$el.find( ':input' ).each( _.bind( function( i, input ) {
+                                // Prompt toggling must be deferred because the reset event is
+                                // fired before the input values have been cleared
+                                _.defer( _.bind( this.togglePrompt, this, input, true ) );
+                        }, this ) );
+                },
+
+                showPrompt: function( event ) {
+                        this.togglePrompt( event.target, true );
+                },
+
+                hidePrompt: function( event ) {
+                        this.togglePrompt( event.target, false );
+                },
+
+                hidePromptAndFocus: function( event ) {
+                        this.togglePrompt( event.target, false );
+                        $( ':input', event.target ).focus();
+                },
+
+                setActiveEditor: function() {
+                        wpActiveEditor = 'content';
+                },
+
+                showSyncError: function() {
+                        this.syncError = true;
+                        this.render();
+                },
+
+                submit: function( event ) {
+                        var values, isValid;
+
+                        delete this.syncError;
+                        event.preventDefault();
+
+                        // jQuery's serializeArray returns an array of field tuples, which
+                        // we need to transform into an object before sending to API
+                        values = _.reduce( this.$el.serializeArray(), function( memo, field ) {
+                                memo[ field.name ] = field.value;
+                                return memo;
+                        }, {} );
+
+                        // Ensure that by setting these fields on model that it is valid
+                        // before proceeding with save
+                        this.model.set( values );
+                        isValid = this.model.isValid();
+
+                        // Render again after validating to ensure error notice is accurate
+                        this.render();
+
+                        // Abort save attempt if invalid
+                        if ( ! isValid ) {
+                                return;
+                        }
+
+                        // Show a spinner during the callback.
+                        this.$el.addClass( 'is-saving' );
+
+                        this.model.save()
+                                .always( _.bind( function() {
+                                        this.$el.removeClass( 'is-saving' );
+                                }, this ) )
+                                .success( _.bind( function() {
+                                        this.collection.add( this.model );
+                                        this.model = new QuickPress.Models.Draft();
+                                        this.el.reset();
+                                }, this ) );
+
+                        // Clear any previous error messages
+                        this.render();
+                },
+
+                render: function() {
+                        var $error = this.$el.find( '.error' ),
+                                errorText;
+
+                        if ( this.model.validationError ) {
+                                // Error via submission validation
+                                errorText = quickPress.l10n[ this.model.validationError ];
+                        } else if ( this.syncError ) {
+                                // Error via API save failure
+                                errorText = quickPress.l10n.error;
+                        }
+
+                        // Error notice is only visible if error text determined
+                        $error.toggle( !! errorText );
+                        if ( errorText ) {
+                                $error.html( $( '<p />', { text: errorText } ) );
+                        }
+                }
+        } );
+
+        QuickPress.Views.DraftList = wp.Backbone.View.extend( {
+                initialize: function() {
+                        this.listenTo( this.collection, 'sync', this.onDraftsLoaded );
+                },
+
+                onDraftsLoaded: function() {
+                        this.listenTo( this.collection, 'add', this.renderNew );
+                        this.render();
+                },
+
+                renderNew: function() {
+                        // Display highlight effect to first (added) item for one second
+                        var $newEl = this.render().$el.find( 'li:first' ).addClass( 'is-new' );
+                        setTimeout( function() {
+                                $newEl.removeClass( 'is-new' );
+                        }, 1000 );
+                },
+
+                render: function() {
+                        // Hide drafts list if no drafts exist
+                        this.$el.toggle( this.collection.length > 0 );
+
+                        // "View All" link is visible if 5 or more drafts, since we only
+                        // show a maximum of 5 drafts in the list
+                        this.$el.find( '.view-all' ).toggle( this.collection.length > 0 );
+
+                        // If after drafts load, this could be the first render, so remove
+                        // placeholder effect and render the first four drafts
+                        this.$el.find( '.drafts-list' )
+                                .removeClass( 'is-placeholder' )
+                                .html( _.map( _.take( this.collection.models, 4 ), function( draft ) {
+                                        return new QuickPress.Views.DraftListItem( {
+                                                model: draft
+                                        } ).render().el;
+                                } ) );
+
+                        return this;
+                }
+        } );
+
+        QuickPress.Views.DraftListItem = wp.Backbone.View.extend( {
+                tagName: 'li',
+
+                template: wp.template( 'item-quick-press-draft' ),
+
+                render: function() {
+                        this.$el.html( this.template( this.model.attributes ) );
+
+                        return this;
+                }
+        } );
+
+        /**
+         * Initialize
+         */
+
+        // Fetch drafts
+        draftsCollection = new QuickPress.Collections.Drafts();
+        draftsCollection.fetch();
+
+        // Drafts list is initialized but not rendered until drafts load
+        new QuickPress.Views.DraftList( {
+                el: '#quick-press-drafts',
+                collection: draftsCollection
+        } );
+
+        new QuickPress.Views.Form( {
+                el: '#quick-press',
+                model: new QuickPress.Models.Draft(),
+                collection: draftsCollection
+        } ).render();
 } );

src/wp-includes/rest-api.php

@@ -229 +229 @@
         // Settings.
         $controller = new WP_REST_Settings_Controller;
         $controller->register_routes();
+
+        // Quick Drafts.
+        $controller = new WP_REST_Quick_Drafts_Controller;
+        $controller->register_routes();
 }
 
 /**

new file src/wp-includes/rest-api/endpoints/class-wp-rest-quick-drafts-controller.php

@@ +1 @@
+<?php
+/**
+ * REST API: WP_REST_Quick_Drafts_Controller class
+ *
+ * @package WordPress
+ * @subpackage REST_API
+ * @since 4.8.0
+ */
+
+/**
+ * Core class to access dashboard Quick Drafts via the REST API.
+ *
+ * @since 4.8.0
+ *
+ * @see WP_REST_Controller
+ */
+class WP_REST_Quick_Drafts_Controller extends WP_REST_Posts_Controller {
+
+        /**
+         * Post type.
+         *
+         * @since 4.8.0
+         * @access protected
+         * @var string
+         */
+        protected $post_type = 'post';
+
+        /**
+         * Constructor.
+         *
+         * @since 4.8.0
+         * @access public
+         */
+        public function __construct() {
+                $this->namespace = 'wp-admin/v1';
+                $this->rest_base = 'quick-drafts';
+                $this->meta = new WP_REST_Post_Meta_Fields( $this->post_type );
+        }
+
+        /**
+         * Registers the routes for the objects of the controller.
+         *
+         * @since 4.8.0
+         * @access public
+         *
+         * @see register_rest_route()
+         */
+        public function register_routes() {
+                register_rest_route( $this->namespace, '/' . $this->rest_base, array(
+                        array(
+                                'methods'             => WP_REST_Server::READABLE,
+                                'callback'            => array( $this, 'get_items' ),
+                                'permission_callback' => array( $this, 'get_items_permissions_check' )
+                        ),
+                        array(
+                                'methods'             => WP_REST_Server::CREATABLE,
+                                'callback'            => array( $this, 'create_item' ),
+                                'permission_callback' => array( $this, 'create_item_permissions_check' ),
+                                'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::CREATABLE ),
+                        ),
+                        'schema' => array( $this, 'get_public_item_schema' ),
+                ) );
+        }
+
+        /**
+         * Checks if a given request has access to read posts.
+         *
+         * @since 4.8.0
+         * @access public
+         *
+         * @param  WP_REST_Request $request Full details about the request.
+         * @return true|WP_Error True if the request has read access, WP_Error object otherwise.
+         */
+        public function get_items_permissions_check( $request ) {
+                if ( ! current_user_can( 'edit_posts' ) ) {
+                        return new WP_Error( 'rest_forbidden_context', __( 'Sorry, you are not allowed to edit these posts.' ), array( 'status' => rest_authorization_required_code() ) );
+                }
+
+                return true;
+        }
+
+        /**
+         * Retrieves a collection of posts.
+         *
+         * @since 4.8.0
+         * @access public
+         *
+         * @param WP_REST_Request $request Full details about the request.
+         * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+         */
+        public function get_items( $request ) {
+                $query_args = array(
+                        'post_type'      => 'post',
+                        'post_status'    => 'draft',
+                        'author'         => get_current_user_id(),
+                        'posts_per_page' => 4,
+                        'orderby'        => 'modified',
+                        'order'          => 'DESC'
+                );
+
+                /**
+                 * Filters the post query arguments for the 'Recent Drafts' dashboard widget.
+                 *
+                 * @since 4.4.0
+                 *
+                 * @param array $query_args The query arguments for the 'Recent Drafts' dashboard widget.
+                 */
+                $query_args = apply_filters( 'dashboard_recent_drafts_query_args', $query_args );
+
+                $posts_query  = new WP_Query();
+                $query_result = $posts_query->query( $query_args );
+
+                $posts = array();
+
+                foreach ( $query_result as $post ) {
+                        if ( ! $this->check_read_permission( $post ) ) {
+                                continue;
+                        }
+
+                        $data    = $this->prepare_item_for_response( $post, $request );
+                        $posts[] = $this->prepare_response_for_collection( $data );
+                }
+
+                $response = rest_ensure_response( $posts );
+
+                return $response;
+        }
+
+        /**
+         * Checks if a given request has access to create a post.
+         *
+         * @since 4.8.0
+         * @access public
+         *
+         * @param WP_REST_Request $request Full details about the request.
+         * @return true|WP_Error True if the request has access to create items, WP_Error object otherwise.
+         */
+        public function create_item_permissions_check( $request ) {
+                if ( ! current_user_can( 'edit_posts' ) ) {
+                        return new WP_Error( 'rest_cannot_create', __( 'Sorry, you are not allowed to create new posts.' ), array( 'status' => rest_authorization_required_code() ) );
+                }
+
+                return true;
+        }
+
+        /**
+         * Creates a single post.
+         *
+         * @since 4.8.0
+         * @access public
+         *
+         * @param WP_REST_Request $request Full details about the request.
+         * @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
+         */
+        public function create_item( $request ) {
+                $post = $this->prepare_item_for_database( $request );
+
+                if ( is_wp_error( $post ) ) {
+                        return $post;
+                }
+
+                $post->post_type = $this->post_type;
+                $post_id         = wp_insert_post( $post, true );
+
+                if ( is_wp_error( $post_id ) ) {
+                        if ( 'db_insert_error' === $post_id->get_error_code() ) {
+                                $post_id->add_data( array( 'status' => 500 ) );
+                        } else {
+                                $post_id->add_data( array( 'status' => 400 ) );
+                        }
+
+                        return $post_id;
+                }
+
+                $schema = $this->get_item_schema();
+
+                $post = $this->get_post( $post_id );
+
+                $fields_update = $this->update_additional_fields_for_object( $post, $request );
+
+                if ( is_wp_error( $fields_update ) ) {
+                        return $fields_update;
+                }
+
+                /** This action is documented in wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php */
+                do_action( "rest_insert_{$this->post_type}", $post, $request, true );
+
+                $request->set_param( 'context', 'edit' );
+
+                $response = $this->prepare_item_for_response( $post, $request );
+                $response = rest_ensure_response( $response );
+
+                $response->set_status( 201 );
+                $response->header( 'Location', rest_url( sprintf( '%s/%s/%d', $this->namespace, $this->rest_base, $post_id ) ) );
+
+                return $response;
+        }
+
+        /**
+         * Prepares a single post for create.
+         *
+         * @since 4.8.0
+         * @access protected
+         *
+         * @param WP_REST_Request $request Request object.
+         * @return stdClass|WP_Error Post object or WP_Error.
+         */
+        protected function prepare_item_for_database( $request ) {
+                $prepared_post = new stdClass;
+
+                $schema = $this->get_item_schema();
+
+                // Post title.
+                if ( ! empty( $schema['properties']['title'] ) && is_string( $request['title'] ) ) {
+                        $prepared_post->post_title = wp_filter_post_kses( $request['title'] );
+                }
+
+                // Post content.
+                if ( ! empty( $schema['properties']['content'] ) && is_string( $request['content'] ) ) {
+                        $prepared_post->post_content = wp_filter_post_kses( $request['content'] );
+                }
+
+                /** This filter is documented in wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php */
+                return apply_filters( "rest_pre_insert_{$this->post_type}", $prepared_post, $request );
+
+        }
+
+        /**
+         * Checks if a post can be read.
+         *
+         * Correctly handles posts with the inherit status.
+         *
+         * @since 4.8.0
+         * @access public
+         *
+         * @param object $post Post object.
+         * @return bool Whether the post can be read.
+         */
+        public function check_read_permission( $post ) {
+                return current_user_can( 'edit_posts' );
+        }
+
+        /**
+         * Checks if a post can be created.
+         *
+         * @since 4.8.0
+         * @access protected
+         *
+         * @param object $post Post object.
+         * @return bool Whether the post can be created.
+         */
+        protected function check_create_permission( $post ) {
+                return current_user_can( 'edit_posts' );
+        }
+
+        /**
+         * Prepares a single post output for response.
+         *
+         * @since 4.8.0
+         * @access public
+         *
+         * @param WP_Post         $post    Post object.
+         * @param WP_REST_Request $request Request object.
+         * @return WP_REST_Response Response object.
+         */
+        public function prepare_item_for_response( $post, $request ) {
+                $GLOBALS['post'] = $post;
+
+                setup_postdata( $post );
+
+                $schema = $this->get_item_schema();
+
+                $data = array();
+
+                if ( ! empty( $schema['properties']['date'] ) ) {
+                        $data['date'] = array(
+                                'raw'      => $this->prepare_date_response( $post->post_date_gmt, $post->post_date ),
+                                'rendered' => get_the_time( __( 'F j, Y' ), $post->ID ),
+                        );
+                }
+
+                if ( ! empty( $schema['properties']['title'] ) ) {
+                        $data['title'] = get_the_title( $post->ID );
+                }
+
+                if ( ! empty( $schema['properties']['content'] ) ) {
+                        $data['content'] = wp_trim_words( $post->post_content, 10 );
+                }
+
+                if ( ! empty( $schema['properties']['edit_link'] ) ) {
+                        $data['edit_link'] = get_edit_post_link( $post->ID );
+                }
+
+                $data    = $this->add_additional_fields_to_object( $data, $request );
+
+                // Wrap the data in a response object.
+                $response = rest_ensure_response( $data );
+
+                $response->add_links( $this->prepare_links( $post ) );
+
+                /** This filter is documented in wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php */
+                return apply_filters( "rest_prepare_{$this->post_type}", $response, $post, $request );
+        }
+
+        /**
+         * Retrieves the post's schema, conforming to JSON Schema.
+         *
+         * @since 4.8.0
+         * @access public
+         *
+         * @return array Item schema data.
+         */
+        public function get_item_schema() {
+                $schema = array(
+                        '$schema'    => 'http://json-schema.org/draft-04/schema#',
+                        'title'      => $this->post_type,
+                        'type'       => 'object',
+                        'properties' => array(
+                                'title'           => array(
+                                        'description' => __( 'The title for the object.' ),
+                                        'type'        => 'string',
+                                        'arg_options' => array(
+                                                'sanitize_callback' => null, // Note: sanitization implemented in self::prepare_item_for_database()
+                                        ),
+                                ),
+                                'content'         => array(
+                                        'description' => __( 'The truncated content for the object.' ),
+                                        'type'        => 'string',
+                                        'arg_options' => array(
+                                                'sanitize_callback' => null, // Note: sanitization implemented in self::prepare_item_for_database()
+                                        ),
+                                ),
+                                'date'            => array(
+                                        'description' => __( 'The date the object was published.' ),
+                                        'type'        => 'object',
+                                        'readonly'    => true,
+                                        'properties'  => array(
+                                                'raw'      => array(
+                                                        'description' => __( 'The ISO8601 compliant date the object was published.' ),
+                                                        'type'        => 'string',
+                                                        'format'      => 'date-time',
+                                                        'readonly'    => true,
+                                                ),
+                                                'rendered' => array(
+                                                        'description' => __( "The date the object was published, in the site's timezone." ),
+                                                        'type'        => 'string',
+                                                        'readonly'    => true,
+                                                ),
+                                        ),
+                                ),
+                                'edit_link'       => array(
+                                        'description' => __( 'URL to edit the post.' ),
+                                        'type'        => 'string',
+                                        'readonly'    => true,
+                                ),
+                        ),
+                );
+
+                return $this->add_additional_fields_schema( $schema );
+        }
+}

src/wp-includes/script-loader.php

@@ -716 +716 @@
                         'current' => __( 'Current Color' ),
                 ) );
 
-                $scripts->add( 'dashboard', "/wp-admin/js/dashboard$suffix.js", array( 'jquery', 'admin-comments', 'postbox' ), false, 1 );
+                $scripts->add( 'dashboard', "/wp-admin/js/dashboard$suffix.js", array( 'jquery', 'admin-comments', 'postbox', 'wp-api', 'wp-backbone' ), false, 2 );
+                did_action( 'init' ) && $scripts->localize( 'dashboard', 'quickPress', array(
+                        'l10n' => array(
+                                'no-content' => __( 'Post content cannot be empty.' ),
+                                'error'      => __( 'An error has occurred. Please reload the page and try again.' )
+                        )
+                ) );
 
                 $scripts->add( 'list-revisions', "/wp-includes/js/wp-list-revisions$suffix.js" );
 

src/wp-settings.php

@@ -227 +227 @@
 require( ABSPATH . WPINC . '/rest-api/endpoints/class-wp-rest-users-controller.php' );
 require( ABSPATH . WPINC . '/rest-api/endpoints/class-wp-rest-comments-controller.php' );
 require( ABSPATH . WPINC . '/rest-api/endpoints/class-wp-rest-settings-controller.php' );
+require( ABSPATH . WPINC . '/rest-api/endpoints/class-wp-rest-quick-drafts-controller.php' );
 require( ABSPATH . WPINC . '/rest-api/fields/class-wp-rest-meta-fields.php' );
 require( ABSPATH . WPINC . '/rest-api/fields/class-wp-rest-comment-meta-fields.php' );
 require( ABSPATH . WPINC . '/rest-api/fields/class-wp-rest-post-meta-fields.php' );