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<title>[40676] trunk: Customize: Keep alive auto-drafts created for page/post stubs when parent changeset is updated, and delete when changeset is garbage-collected.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/40676">40676</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/40676","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>westonruter</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2017-05-16 05:36:25 +0000 (Tue, 16 May 2017)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Customize: Keep alive auto-drafts created for page/post stubs when parent changeset is updated, and delete when changeset is garbage-collected.

Props utkarshpatel, westonruter.
See <a href="https://core.trac.wordpress.org/ticket/31089">#31089</a>.
Fixes <a href="https://core.trac.wordpress.org/ticket/39715">#39715</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesdefaultfiltersphp">trunk/src/wp-includes/default-filters.php</a></li>
<li><a href="#trunksrcwpincludesnavmenuphp">trunk/src/wp-includes/nav-menu.php</a></li>
<li><a href="#trunksrcwpincludesthemephp">trunk/src/wp-includes/theme.php</a></li>
<li><a href="#trunktestsphpunittestspostnavmenuphp">trunk/tests/phpunit/tests/post/nav-menu.php</a></li>
<li><a href="#trunktestsphpunitteststhemephp">trunk/tests/phpunit/tests/theme.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesdefaultfiltersphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/default-filters.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/default-filters.php 2017-05-16 00:10:42 UTC (rev 40675)
+++ trunk/src/wp-includes/default-filters.php   2017-05-16 05:36:25 UTC (rev 40676)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -325,6 +325,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> add_action( 'delete_post',                '_wp_delete_post_menu_item'         );
</span><span class="cx" style="display: block; padding: 0 10px"> add_action( 'delete_term',                '_wp_delete_tax_menu_item',   10, 3 );
</span><span class="cx" style="display: block; padding: 0 10px"> add_action( 'transition_post_status',     '_wp_auto_add_pages_to_menu', 10, 3 );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+add_action( 'delete_post',                '_wp_delete_customize_changeset_dependent_auto_drafts' );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> // Post Thumbnail CSS class filtering
</span><span class="cx" style="display: block; padding: 0 10px"> add_action( 'begin_fetch_post_thumbnail_html', '_wp_post_thumbnail_class_filter_add'    );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -400,6 +401,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> add_action( 'transition_post_status', '_wp_customize_publish_changeset', 10, 3 );
</span><span class="cx" style="display: block; padding: 0 10px"> add_action( 'admin_enqueue_scripts', '_wp_customize_loader_settings' );
</span><span class="cx" style="display: block; padding: 0 10px"> add_action( 'delete_attachment', '_delete_attachment_theme_mod' );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+add_action( 'transition_post_status', '_wp_keep_alive_customize_changeset_dependent_auto_drafts', 20, 3 );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> // Calendar widget cache
</span><span class="cx" style="display: block; padding: 0 10px"> add_action( 'save_post', 'delete_get_calendar_cache' );
</span></span></pre></div>
<a id="trunksrcwpincludesnavmenuphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/nav-menu.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/nav-menu.php        2017-05-16 00:10:42 UTC (rev 40675)
+++ trunk/src/wp-includes/nav-menu.php  2017-05-16 05:36:25 UTC (rev 40676)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -978,3 +978,31 @@
</span><span class="cx" style="display: block; padding: 0 10px">                wp_update_nav_menu_item( $menu_id, 0, $args );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+/**
+ * Delete auto-draft posts associated with the supplied changeset.
+ *
+ * @since 4.8.0
+ * @access private
+ *
+ * @param int $post_id Post ID for the customize_changeset.
+ */
+function _wp_delete_customize_changeset_dependent_auto_drafts( $post_id ) {
+       $post = get_post( $post_id );
+
+       if ( ! $post || 'customize_changeset' !== $post->post_type ) {
+               return;
+       }
+
+       $data = json_decode( $post->post_content, true );
+       if ( empty( $data['nav_menus_created_posts']['value'] ) ) {
+               return;
+       }
+       remove_action( 'delete_post', '_wp_delete_customize_changeset_dependent_auto_drafts' );
+       foreach ( $data['nav_menus_created_posts']['value'] as $post_id ) {
+               if ( ! empty( $post_id ) && 'auto-draft' === get_post_status( $post_id ) ) {
+                       wp_delete_post( $post_id, true );
+               }
+       }
+       add_action( 'delete_post', '_wp_delete_customize_changeset_dependent_auto_drafts' );
+}
</ins></span></pre></div>
<a id="trunksrcwpincludesthemephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/theme.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/theme.php   2017-05-16 00:10:42 UTC (rev 40675)
+++ trunk/src/wp-includes/theme.php     2017-05-16 05:36:25 UTC (rev 40676)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3059,3 +3059,65 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        return ( $wp_customize instanceof WP_Customize_Manager ) && $wp_customize->is_preview();
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+/**
+ * Make sure that auto-draft posts get their post_date bumped to prevent premature garbage-collection.
+ *
+ * When a changeset is updated but remains an auto-draft, ensure the post_date
+ * for the auto-draft posts remains the same so that it will be
+ * garbage-collected at the same time by `wp_delete_auto_drafts()`. Otherwise,
+ * if the changeset is updated to be a draft then update the posts
+ * to have a far-future post_date so that they will never be garbage collected
+ * unless the changeset post itself is deleted.
+ *
+ * @since 4.8.0
+ * @access private
+ * @see wp_delete_auto_drafts()
+ *
+ * @param string   $new_status Transition to this post status.
+ * @param string   $old_status Previous post status.
+ * @param \WP_Post $post       Post data.
+ * @global wpdb $wpdb
+ */
+function _wp_keep_alive_customize_changeset_dependent_auto_drafts( $new_status, $old_status, $post ) {
+       global $wpdb;
+       unset( $old_status );
+
+       // Short-circuit if not a changeset or if the changeset was published.
+       if ( 'customize_changeset' !== $post->post_type || 'publish' === $new_status ) {
+               return;
+       }
+
+       if ( 'auto-draft' === $new_status ) {
+               /*
+                * Keep the post date for the post matching the changeset
+                * so that it will not be garbage-collected before the changeset.
+                */
+               $new_post_date = $post->post_date;
+       } else {
+               /*
+                * Since the changeset no longer has an auto-draft (and it is not published)
+                * it is now a persistent changeset, a long-lived draft, and so any
+                * associated auto-draft posts should have their dates
+                * pushed out very far into the future to prevent them from ever
+                * being garbage-collected.
+                */
+               $new_post_date = gmdate( 'Y-m-d H:i:d', strtotime( '+100 years' ) );
+       }
+
+       $data = json_decode( $post->post_content, true );
+       if ( empty( $data['nav_menus_created_posts']['value'] ) ) {
+               return;
+       }
+       foreach ( $data['nav_menus_created_posts']['value'] as $post_id ) {
+               if ( empty( $post_id ) || 'auto-draft' !== get_post_status( $post_id ) ) {
+                       continue;
+               }
+               $wpdb->update(
+                       $wpdb->posts,
+                       array( 'post_date' => $new_post_date ), // Note wp_delete_auto_drafts() only looks at this this date.
+                       array( 'ID' => $post_id )
+               );
+               clean_post_cache( $post_id );
+       }
+}
</ins></span></pre></div>
<a id="trunktestsphpunittestspostnavmenuphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/post/nav-menu.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/post/nav-menu.php       2017-05-16 00:10:42 UTC (rev 40675)
+++ trunk/tests/phpunit/tests/post/nav-menu.php 2017-05-16 05:36:25 UTC (rev 40676)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -523,4 +523,34 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertNotContains( 'menu-item-home', $classes );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+       /**
+        * Test _wp_delete_customize_changeset_dependent_auto_drafts.
+        *
+        * @covers _wp_delete_customize_changeset_dependent_auto_drafts()
+        */
+       function test_wp_delete_customize_changeset_dependent_auto_drafts() {
+               $nav_created_post_ids = $this->factory()->post->create_many(2, array(
+                       'post_status' => 'auto-draft',
+               ) );
+               $data = array(
+                       'nav_menus_created_posts' => array(
+                               'value' => $nav_created_post_ids,
+                       ),
+               );
+               wp_set_current_user( self::factory()->user->create( array(
+                       'role' => 'administrator',
+               ) ) );
+               require_once ABSPATH . WPINC . '/class-wp-customize-manager.php';
+               $wp_customize = new WP_Customize_Manager();
+               do_action( 'customize_register', $wp_customize );
+               $wp_customize->save_changeset_post( array(
+                       'data' => $data,
+               ) );
+               $this->assertInstanceOf( 'WP_Post', get_post( $nav_created_post_ids[0] ) );
+               $this->assertInstanceOf( 'WP_Post', get_post( $nav_created_post_ids[1] ) );
+               wp_delete_post( $wp_customize->changeset_post_id(), true );
+               $this->assertNotInstanceOf( 'WP_Post', get_post( $nav_created_post_ids[0] ) );
+               $this->assertNotInstanceOf( 'WP_Post', get_post( $nav_created_post_ids[1] ) );
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre></div>
<a id="trunktestsphpunitteststhemephp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/theme.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/theme.php       2017-05-16 00:10:42 UTC (rev 40675)
+++ trunk/tests/phpunit/tests/theme.php 2017-05-16 05:36:25 UTC (rev 40676)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -309,4 +309,36 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals($template, get_template());
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals($style, get_stylesheet());
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+       /**
+        * Test _wp_keep_alive_customize_changeset_dependent_auto_drafts.
+        *
+        * @covers _wp_keep_alive_customize_changeset_dependent_auto_drafts()
+        */
+       function test_wp_keep_alive_customize_changeset_dependent_auto_drafts() {
+               $nav_created_post_ids = $this->factory()->post->create_many(2, array(
+                       'post_status' => 'auto-draft',
+               ) );
+               $data = array(
+                       'nav_menus_created_posts' => array(
+                               'value' => $nav_created_post_ids,
+                       ),
+               );
+               wp_set_current_user( self::factory()->user->create( array( 'role' => 'administrator' ) ) );
+               require_once ABSPATH . WPINC . '/class-wp-customize-manager.php';
+               $wp_customize = new WP_Customize_Manager();
+               do_action( 'customize_register', $wp_customize );
+               $wp_customize->save_changeset_post( array(
+                       'data' => $data,
+               ) );
+               $this->assertEquals( get_post( $nav_created_post_ids[0] )->post_date, get_post( $wp_customize->changeset_post_id() )->post_date );
+               $this->assertEquals( get_post( $nav_created_post_ids[1] )->post_date, get_post( $wp_customize->changeset_post_id() )->post_date );
+               $wp_customize->save_changeset_post( array(
+                       'status' => 'draft',
+                       'data' => $data,
+               ) );
+               $expected_year = date( 'Y' ) + 100;
+               $this->assertEquals( $expected_year, date( 'Y', strtotime( get_post( $nav_created_post_ids[0] )->post_date ) ) );
+               $this->assertEquals( $expected_year, date( 'Y', strtotime( get_post( $nav_created_post_ids[1] )->post_date ) ) );
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre>
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