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<title>[40115] branches/4.7: REST API: Shim `post_date_gmt` for drafts / empty dates in the REST API.</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/40115">40115</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/40115","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>SergeyBiryukov</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2017-02-24 22:02:48 +0000 (Fri, 24 Feb 2017)</dd>
</dl>

<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>REST API: Shim `post_date_gmt` for drafts / empty dates in the REST API.

Internally, WordPress uses a special `post_date_gmt` value of `0000-00-00 00:00:00` to indicate that a draft's date is "floating" and should be updated whenever the post is saved. This makes it much more difficult for API clients to know the correct date of a draft post.

This commit provides a best guess at a `date_gmt` value for draft posts in this situation using the `date` field and the site's current timezone offset.

Props joehoyle, jnylen0.
Merges <a href="https://core.trac.wordpress.org/changeset/40108">[40108]</a> to the 4.7 branch.
Fixes <a href="https://core.trac.wordpress.org/ticket/38883">#38883</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#branches47srcwpincludesrestapiendpointsclasswprestpostscontrollerphp">branches/4.7/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php</a></li>
<li><a href="#branches47testsphpunitincludestestcaserestposttypecontrollerphp">branches/4.7/tests/phpunit/includes/testcase-rest-post-type-controller.php</a></li>
<li><a href="#branches47testsphpunittestsrestapirestpostscontrollerphp">branches/4.7/tests/phpunit/tests/rest-api/rest-posts-controller.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 2017-02-24 21:58:07 UTC (rev 40114)
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+++ branches/4.7  2017-02-24 22:02:48 UTC (rev 40115)
</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:18512,39365,39367,39369,39371,39373,39375-39376,39378,39380,39382,39384,39386,39388,39390,39392-39393,39396-39397,39400,39402,39404,39406,39409,39411,39413,39415,39417-39420,39424,39426,39428,39430,39432-39434,39436,39438,39440,39442-39444,39447,39449-39451,39453,39455-39457,39460,39462,39464,39466,39468,39470-39471,39475,39477-39478,39482-39483,39487-39488,39490,39495-39496,39499,39502,39504,39506,39508,39510,39512,39514,39517,39520,39522,39545-39547,39557-39563,39565,39578,39580-39581,39584,39586,39594-39595,39597-39599,39601,39603,39612-39613,39616-39617,39619-39623,39626,39635,39640,39645,39649,39657,39659,39663,39677-39678,39680-39681,39684-39686,39688-39689,39692,39720,39742,39744,39759-39760,39772,39795,39807-39808,39831,39843,39848,39850,39912,39914,39923-39924,39949,39951-39952,39954,39956,39968,39992,39994,40030,40036,40039-40041,40045,40049,40055,40063-40064,40068,40070
 ,40080,40082,40086,40089,40101,40105-40106,40110
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/trunk:18512,39365,39367,39369,39371,39373,39375-39376,39378,39380,39382,39384,39386,39388,39390,39392-39393,39396-39397,39400,39402,39404,39406,39409,39411,39413,39415,39417-39420,39424,39426,39428,39430,39432-39434,39436,39438,39440,39442-39444,39447,39449-39451,39453,39455-39457,39460,39462,39464,39466,39468,39470-39471,39475,39477-39478,39482-39483,39487-39488,39490,39495-39496,39499,39502,39504,39506,39508,39510,39512,39514,39517,39520,39522,39545-39547,39557-39563,39565,39578,39580-39581,39584,39586,39594-39595,39597-39599,39601,39603,39612-39613,39616-39617,39619-39623,39626,39635,39640,39645,39649,39657,39659,39663,39677-39678,39680-39681,39684-39686,39688-39689,39692,39720,39742,39744,39759-39760,39772,39795,39807-39808,39831,39843,39848,39850,39912,39914,39923-39924,39949,39951-39952,39954,39956,39968,39992,39994,40030,40036,40039-40041,40045,40049,40055,40063-40064,40068,40070,
 40080,40082,40086,40089,40101,40105-40106,40108,40110
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span><a id="branches47srcwpincludesrestapiendpointsclasswprestpostscontrollerphp"></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/rest-api/endpoints/class-wp-rest-posts-controller.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.7/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php        2017-02-24 21:58:07 UTC (rev 40114)
+++ branches/4.7/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php  2017-02-24 22:02:48 UTC (rev 40115)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1385,7 +1385,16 @@
</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">                if ( ! empty( $schema['properties']['date_gmt'] ) ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $data['date_gmt'] = $this->prepare_date_response( $post->post_date_gmt );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // For drafts, `post_date_gmt` may not be set, indicating that the
+                       // date of the draft should be updated each time it is saved (see
+                       // #38883).  In this case, shim the value based on the `post_date`
+                       // field with the site's timezone offset applied.
+                       if ( '0000-00-00 00:00:00' === $post->post_date_gmt ) {
+                               $post_date_gmt = date( 'Y-m-d H:i:s', strtotime( $post->post_date ) - ( get_option( 'gmt_offset' ) * 3600 ) );
+                       } else {
+                               $post_date_gmt = $post->post_date_gmt;
+                       }
+                       $data['date_gmt'] = $this->prepare_date_response( $post_date_gmt );
</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">                if ( ! empty( $schema['properties']['guid'] ) ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1401,7 +1410,16 @@
</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">                if ( ! empty( $schema['properties']['modified_gmt'] ) ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $data['modified_gmt'] = $this->prepare_date_response( $post->post_modified_gmt );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 // For drafts, `post_modified_gmt` may not be set (see
+                       // `post_date_gmt` comments above).  In this case, shim the value
+                       // based on the `post_modified` field with the site's timezone
+                       // offset applied.
+                       if ( '0000-00-00 00:00:00' === $post->post_modified_gmt ) {
+                               $post_modified_gmt = date( 'Y-m-d H:i:s', strtotime( $post->post_modified ) - ( get_option( 'gmt_offset' ) * 3600 ) );
+                       } else {
+                               $post_modified_gmt = $post->post_modified_gmt;
+                       }
+                       $data['modified_gmt'] = $this->prepare_date_response( $post_modified_gmt );
</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">                if ( ! empty( $schema['properties']['password'] ) ) {
</span></span></pre></div>
<a id="branches47testsphpunitincludestestcaserestposttypecontrollerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.7/tests/phpunit/includes/testcase-rest-post-type-controller.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.7/tests/phpunit/includes/testcase-rest-post-type-controller.php        2017-02-24 21:58:07 UTC (rev 40114)
+++ branches/4.7/tests/phpunit/includes/testcase-rest-post-type-controller.php  2017-02-24 22:02:48 UTC (rev 40115)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -10,12 +10,18 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( $post->post_name, $data['slug'] );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( get_permalink( $post->ID ), $data['link'] );
</span><span class="cx" style="display: block; padding: 0 10px">                if ( '0000-00-00 00:00:00' === $post->post_date_gmt ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $this->assertNull( $data['date_gmt'] );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 $post_date_gmt = date( 'Y-m-d H:i:s', strtotime( $post->post_date ) - ( get_option( 'gmt_offset' ) * 3600 ) );
+                       $this->assertEquals( mysql_to_rfc3339( $post_date_gmt ), $data['date_gmt'] );
+               } else {
+                       $this->assertEquals( mysql_to_rfc3339( $post->post_date_gmt ), $data['date_gmt'] );
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( mysql_to_rfc3339( $post->post_date ), $data['date'] );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                if ( '0000-00-00 00:00:00' === $post->post_modified_gmt ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        $this->assertNull( $data['modified_gmt'] );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 $post_modified_gmt = date( 'Y-m-d H:i:s', strtotime( $post->post_modified ) - ( get_option( 'gmt_offset' ) * 3600 ) );
+                       $this->assertEquals( mysql_to_rfc3339( $post_modified_gmt ), $data['modified_gmt'] );
+               } else {
+                       $this->assertEquals( mysql_to_rfc3339( $post->post_modified_gmt ), $data['modified_gmt'] );
</ins><span class="cx" style="display: block; padding: 0 10px">                 }
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( mysql_to_rfc3339( $post->post_modified ), $data['modified'] );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -139,18 +145,6 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                if ( 'edit' === $context ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        $this->assertEquals( $post->guid, $data['guid']['raw'] );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-
-                       if ( '0000-00-00 00:00:00' === $post->post_date_gmt ) {
-                               $this->assertNull( $data['date_gmt'] );
-                       } else {
-                               $this->assertEquals( mysql_to_rfc3339( $post->post_date_gmt ), $data['date_gmt'] );
-                       }
-
-                       if ( '0000-00-00 00:00:00' === $post->post_modified_gmt ) {
-                               $this->assertNull( $data['modified_gmt'] );
-                       } else {
-                               $this->assertEquals( mysql_to_rfc3339( $post->post_modified_gmt ), $data['modified_gmt'] );
-                       }
</del><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">                $taxonomies = wp_list_filter( get_object_taxonomies( $post->post_type, 'objects' ), array( 'show_in_rest' => true ) );
</span></span></pre></div>
<a id="branches47testsphpunittestsrestapirestpostscontrollerphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: branches/4.7/tests/phpunit/tests/rest-api/rest-posts-controller.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- branches/4.7/tests/phpunit/tests/rest-api/rest-posts-controller.php       2017-02-24 21:58:07 UTC (rev 40114)
+++ branches/4.7/tests/phpunit/tests/rest-api/rest-posts-controller.php 2017-02-24 22:02:48 UTC (rev 40115)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1195,7 +1195,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( $post_date, $post->post_date );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( $results['date_gmt'], $data['date_gmt'] );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                // TODO expect null here for drafts (see https://core.trac.wordpress.org/ticket/5698#comment:14)
</del><span class="cx" style="display: block; padding: 0 10px">                 $post_date_gmt = str_replace( 'T', ' ', $results['date_gmt'] );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( $post_date_gmt, $post->post_date_gmt );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1294,15 +1293,27 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        public function test_create_post_as_contributor() {
</span><span class="cx" style="display: block; padding: 0 10px">                wp_set_current_user( self::$contributor_id );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                update_option( 'timezone_string', 'America/Chicago' );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $request = new WP_REST_Request( 'POST', '/wp/v2/posts' );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                $params = $this->set_post_data(array(
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $params = $this->set_post_data( array(
+                       // This results in a special `post_date_gmt` value of
+                       // '0000-00-00 00:00:00'.  See #38883.
</ins><span class="cx" style="display: block; padding: 0 10px">                         'status' => 'pending',
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                ));
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         ) );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $request->set_body_params( $params );
</span><span class="cx" style="display: block; padding: 0 10px">                $response = $this->server->dispatch( $request );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                $this->assertEquals( 201, $response->get_status() );
+
+               $data = $response->get_data();
+               $post = get_post( $data['id'] );
+               $this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+               $this->assertNotEquals( '0000-00-00T00:00:00', $data['date_gmt'] );
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 $this->check_create_post_response( $response );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+               update_option( 'timezone_string', '' );
</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">        public function test_create_post_sticky() {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1375,9 +1386,12 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $new_post = get_post( $data['id'] );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( 'draft', $data['status'] );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( 'draft', $new_post->post_status );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                // Confirm dates are null
-               $this->assertNull( $data['date_gmt'] );
-               $this->assertNull( $data['modified_gmt'] );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         // Confirm dates are shimmed for gmt_offset
+               $post_modified_gmt = date( 'Y-m-d H:i:s', strtotime( $new_post->post_modified ) + ( get_option( 'gmt_offset' ) * 3600 ) );
+               $post_date_gmt = date( 'Y-m-d H:i:s', strtotime( $new_post->post_date ) + ( get_option( 'gmt_offset' ) * 3600 ) );
+
+               $this->assertEquals( mysql_to_rfc3339( $post_modified_gmt ), $data['modified_gmt'] );
+               $this->assertEquals( mysql_to_rfc3339( $post_date_gmt ), $data['date_gmt'] );
</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">        public function test_create_post_private() {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2062,7 +2076,6 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( $post_date, $post->post_date );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( $results['date_gmt'], $data['date_gmt'] );
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                // TODO expect null here for drafts (see https://core.trac.wordpress.org/ticket/5698#comment:14)
</del><span class="cx" style="display: block; padding: 0 10px">                 $post_date_gmt = str_replace( 'T', ' ', $results['date_gmt'] );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertEquals( $post_date_gmt, $post->post_date_gmt );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -2093,6 +2106,57 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertErrorResponse( 'rest_invalid_param', $response, 400 );
</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">+        public function test_empty_post_date_gmt_shimmed_using_post_date() {
+               global $wpdb;
+
+               wp_set_current_user( self::$editor_id );
+               update_option( 'timezone_string', 'America/Chicago' );
+
+               // Need to set dates using wpdb directly because `wp_update_post` and
+               // `wp_insert_post` have additional validation on dates.
+               $post_id = $this->factory->post->create();
+               $wpdb->update(
+                       $wpdb->posts,
+                       array(
+                               'post_date'     => '2016-02-23 12:00:00',
+                               'post_date_gmt' => '0000-00-00 00:00:00',
+                       ),
+                       array(
+                               'ID' => $post_id,
+                       ),
+                       array( '%s', '%s' ),
+                       array( '%d' )
+               );
+               wp_cache_delete( $post_id, 'posts' );
+
+               $post = get_post( $post_id );
+               $this->assertEquals( $post->post_date,     '2016-02-23 12:00:00' );
+               $this->assertEquals( $post->post_date_gmt, '0000-00-00 00:00:00' );
+
+               $request = new WP_REST_Request( 'GET', sprintf( '/wp/v2/posts/%d', $post_id ) );
+               $response = $this->server->dispatch( $request );
+               $this->assertEquals( 200, $response->get_status() );
+               $data = $response->get_data();
+
+               $this->assertEquals( '2016-02-23T12:00:00', $data['date'] );
+               $this->assertEquals( '2016-02-23T18:00:00', $data['date_gmt'] );
+
+               $request = new WP_REST_Request( 'PUT', sprintf( '/wp/v2/posts/%d', $post_id ) );
+               $request->set_param( 'date', '2016-02-23T13:00:00' );
+               $response = $this->server->dispatch( $request );
+               $this->assertEquals( 200, $response->get_status() );
+               $data = $response->get_data();
+
+               $this->assertEquals( '2016-02-23T13:00:00', $data['date'] );
+               $this->assertEquals( '2016-02-23T19:00:00', $data['date_gmt'] );
+
+               $post = get_post( $post_id );
+               $this->assertEquals( $post->post_date,     '2016-02-23 13:00:00' );
+               $this->assertEquals( $post->post_date_gmt, '2016-02-23 19:00:00' );
+
+               update_option( 'timezone_string', '' );
+       }
+
</ins><span class="cx" style="display: block; padding: 0 10px">         public function test_update_post_slug() {
</span><span class="cx" style="display: block; padding: 0 10px">                wp_set_current_user( self::$editor_id );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre>
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