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<title>[40425] branches/4.7: Media: Add filters to allow overriding slow media queries.</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/40425">40425</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/40425","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>swissspidy</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2017-04-14 08:39:46 +0000 (Fri, 14 Apr 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'>Media: Add filters to allow overriding slow media queries.

There are a couple of queries that do a full table scan of attachment posts to support features of the media library. Pending a more complete solution, allow overriding these queries via filters.

Props sboisvert, jnylen0.
See <a href="https://core.trac.wordpress.org/ticket/31071">#31071</a>.

Merges <a href="https://core.trac.wordpress.org/changeset/40382">[40382]</a> and <a href="https://core.trac.wordpress.org/changeset/40421">[40421]</a> to the 4.7 branch.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#branches47srcwpincludesmediaphp">branches/4.7/src/wp-includes/media.php</a></li>
</ul>

<h3>Property Changed</h3>
<ul>
<li><a href="#branches47">branches/4.7/</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<span class="cx" style="display: block; padding: 0 10px">Index: branches/4.7
</span><span class="cx" style="display: block; padding: 0 10px">===================================================================
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">--- branches/4.7 2017-04-13 23:08:03 UTC (rev 40424)
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+++ branches/4.7  2017-04-14 08:39:46 UTC (rev 40425)
</ins><a id="branches47"></a>
<div class="propset"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Property changes: branches/4.7</h4>
<pre class="diff"><span>
</span></pre></div>
<a id="svnmergeinfo"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: svn:mergeinfo</h4></div>
<span class="cx" style="display: block; padding: 0 10px"> /branches/3.1:18031
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/3.3:20543
</span><span class="cx" style="display: block; padding: 0 10px"> /branches/3.4:21757
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-/trunk:18512,39365,39367,39369,39371,39373,39375-39376,39378,39380,39382,39384,39386,39388,39390,39392-39393,39396-39397,39400,39402,39404,39406,39409,39411,39413,39415,39417-39420,39424,39426,39428,39430,39432-39434,39436,39438,39440,39442-39444,39447,39449-39451,39453,39455-39457,39460,39462,39464,39466,39468,39470-39471,39475,39477-39478,39482-39483,39487-39488,39490,39495-39496,39499,39502,39504,39506,39508,39510,39512,39514,39517,39520,39522,39545-39547,39557-39563,39565,39578,39580-39581,39584,39586,39594-39595,39597-39599,39601,39603,39612-39613,39616-39617,39619-39623,39626,39635,39640,39645,39649,39657,39659,39663,39677-39678,39680-39681,39684-39686,39688-39689,39692,39720,39742,39744,39759-39760,39772,39795,39807-39808,39831,39843,39848,39850,39912,39914,39919,39923-39924,39949,39951-39952,39954,39956,39968,39992,39994,40030,40036-40037,40039-40041,40045,40049,40055-40056,40058
 ,40061,40063-40066,40068,40070,40074,40077,40080,40082,40086,40089,40101,40104-40106,40108-40110,40118,40120-40126,40129-40131,40148,40160,40169,40181,40183,40195,40235,40238,40241,40252,40255,40257-40259,40263-40264,40269,40271,40284,40290,40300-40306,40311,40313-40316,40318-40320,40324,40333,40353,40357-40358,40368,40379-40381,40395-40398,40405
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/trunk:18512,39365,39367,39369,39371,39373,39375-39376,39378,39380,39382,39384,39386,39388,39390,39392-39393,39396-39397,39400,39402,39404,39406,39409,39411,39413,39415,39417-39420,39424,39426,39428,39430,39432-39434,39436,39438,39440,39442-39444,39447,39449-39451,39453,39455-39457,39460,39462,39464,39466,39468,39470-39471,39475,39477-39478,39482-39483,39487-39488,39490,39495-39496,39499,39502,39504,39506,39508,39510,39512,39514,39517,39520,39522,39545-39547,39557-39563,39565,39578,39580-39581,39584,39586,39594-39595,39597-39599,39601,39603,39612-39613,39616-39617,39619-39623,39626,39635,39640,39645,39649,39657,39659,39663,39677-39678,39680-39681,39684-39686,39688-39689,39692,39720,39742,39744,39759-39760,39772,39795,39807-39808,39831,39843,39848,39850,39912,39914,39919,39923-39924,39949,39951-39952,39954,39956,39968,39992,39994,40030,40036-40037,40039-40041,40045,40049,40055-40056,40058,
 40061,40063-40066,40068,40070,40074,40077,40080,40082,40086,40089,40101,40104-40106,40108-40110,40118,40120-40126,40129-40131,40148,40160,40169,40181,40183,40195,40235,40238,40241,40252,40255,40257-40259,40263-40264,40269,40271,40284,40290,40300-40306,40311,40313-40316,40318-40320,40324,40333,40353,40357-40358,40368,40379-40382,40395-40398,40405,40421
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="branches47srcwpincludesmediaphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.7/src/wp-includes/media.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.7/src/wp-includes/media.php    2017-04-13 23:08:03 UTC (rev 40424)
+++ branches/4.7/src/wp-includes/media.php      2017-04-14 08:39:46 UTC (rev 40425)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3319,26 +3319,81 @@
</span><span class="cx" style="display: block; padding: 0 10px">                }
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        $has_audio = $wpdb->get_var( "
-               SELECT ID
-               FROM $wpdb->posts
-               WHERE post_type = 'attachment'
-               AND post_mime_type LIKE 'audio%'
-               LIMIT 1
-       " );
-       $has_video = $wpdb->get_var( "
-               SELECT ID
-               FROM $wpdb->posts
-               WHERE post_type = 'attachment'
-               AND post_mime_type LIKE 'video%'
-               LIMIT 1
-       " );
-       $months = $wpdb->get_results( $wpdb->prepare( "
-               SELECT DISTINCT YEAR( post_date ) AS year, MONTH( post_date ) AS month
-               FROM $wpdb->posts
-               WHERE post_type = %s
-               ORDER BY post_date DESC
-       ", 'attachment' ) );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ /**
+        * Allows showing or hiding the "Create Audio Playlist" button in the media library.
+        *
+        * By default (if this filter returns `null`), a query will be run to
+        * determine whether the media library contains any audio items.  This
+        * query is expensive for large media libraries, so it may be desirable for
+        * sites to override this behavior.
+        *
+        * @since 4.7.4
+        *
+        * @link https://core.trac.wordpress.org/ticket/31071
+        *
+        * @param bool|null Whether to show the button, or `null` for default behavior.
+        */
+       $show_audio_playlist = apply_filters( 'media_library_show_audio_playlist', null );
+       if ( null === $show_audio_playlist ) {
+               $show_audio_playlist = $wpdb->get_var( "
+                       SELECT ID
+                       FROM $wpdb->posts
+                       WHERE post_type = 'attachment'
+                       AND post_mime_type LIKE 'audio%'
+                       LIMIT 1
+               " );
+       }
+
+       /**
+        * Allows showing or hiding the "Create Video Playlist" button in the media library.
+        *
+        * By default (if this filter returns `null`), a query will be run to
+        * determine whether the media library contains any video items.  This
+        * query is expensive for large media libraries, so it may be desirable for
+        * sites to override this behavior.
+        *
+        * @since 4.7.4
+        *
+        * @link https://core.trac.wordpress.org/ticket/31071
+        *
+        * @param bool|null Whether to show the button, or `null` for default behavior.
+        */
+       $show_video_playlist = apply_filters( 'media_library_show_video_playlist', null );
+       if ( null === $show_video_playlist ) {
+               $show_video_playlist = $wpdb->get_var( "
+                       SELECT ID
+                       FROM $wpdb->posts
+                       WHERE post_type = 'attachment'
+                       AND post_mime_type LIKE 'video%'
+                       LIMIT 1
+               " );
+       }
+
+       /**
+        * Allows overriding the list of months displayed in the media library.
+        *
+        * By default (if this filter does not return an array), a query will be
+        * run to determine the months that have media items.  This query can be
+        * expensive for large media libraries, so it may be desirable for sites to
+        * override this behavior.
+        *
+        * @since 4.7.4
+        *
+        * @link https://core.trac.wordpress.org/ticket/31071
+        *
+        * @param array|null An array of objects with `month` and `year`
+        *                   properties, or `null` (or any other non-array value)
+        *                   for default behavior.
+        */
+       $months = apply_filters( 'media_library_months_with_files', null );
+       if ( ! is_array( $months ) ) {
+               $months = $wpdb->get_results( $wpdb->prepare( "
+                       SELECT DISTINCT YEAR( post_date ) AS year, MONTH( post_date ) AS month
+                       FROM $wpdb->posts
+                       WHERE post_type = %s
+                       ORDER BY post_date DESC
+               ", 'attachment' ) );
+       }
</ins><span class="cx" style="display: block; padding: 0 10px">         foreach ( $months as $month_year ) {
</span><span class="cx" style="display: block; padding: 0 10px">                $month_year->text = sprintf( __( '%1$s %2$d' ), $wp_locale->get_month( $month_year->month ), $month_year->year );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3357,14 +3412,14 @@
</span><span class="cx" style="display: block; padding: 0 10px">                ),
</span><span class="cx" style="display: block; padding: 0 10px">                'defaultProps' => $props,
</span><span class="cx" style="display: block; padding: 0 10px">                'attachmentCounts' => array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'audio' => ( $has_audio ) ? 1 : 0,
-                       'video' => ( $has_video ) ? 1 : 0
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 'audio' => ( $show_audio_playlist ) ? 1 : 0,
+                       'video' => ( $show_video_playlist ) ? 1 : 0,
</ins><span class="cx" style="display: block; padding: 0 10px">                 ),
</span><span class="cx" style="display: block; padding: 0 10px">                'embedExts'    => $exts,
</span><span class="cx" style="display: block; padding: 0 10px">                'embedMimes'   => $ext_mimes,
</span><span class="cx" style="display: block; padding: 0 10px">                'contentWidth' => $content_width,
</span><span class="cx" style="display: block; padding: 0 10px">                'months'       => $months,
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                'mediaTrash'   => MEDIA_TRASH ? 1 : 0
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         'mediaTrash'   => MEDIA_TRASH ? 1 : 0,
</ins><span class="cx" style="display: block; padding: 0 10px">         );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        $post = null;
</span></span></pre>
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