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<title>[50012] trunk: Posts: Create a new function for resolving the post date.</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/50012">50012</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/50012","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>pento</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2021-01-25 01:06:25 +0000 (Mon, 25 Jan 2021)</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'>Posts: Create a new function for resolving the post date.

`wp_insert_post()` has a few checks using `post_date` and `post_date_gmt`, to determine the correct post date. This functionality is now extracted out into a new `wp_resolve_post_date()` function, allowing the checks to be reused elsewhere.

Props jmdodd.
Fixes <a href="https://core.trac.wordpress.org/ticket/52187">#52187</a>.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludespostphp">trunk/src/wp-includes/post.php</a></li>
<li><a href="#trunktestsphpunittestspostphp">trunk/tests/phpunit/tests/post.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludespostphp"></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/post.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/post.php    2021-01-25 00:08:02 UTC (rev 50011)
+++ trunk/src/wp-includes/post.php      2021-01-25 01:06:25 UTC (rev 50012)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3702,6 +3702,8 @@
</span><span class="cx" style="display: block; padding: 0 10px">                'guid'                  => '',
</span><span class="cx" style="display: block; padding: 0 10px">                'import_id'             => 0,
</span><span class="cx" style="display: block; padding: 0 10px">                'context'               => '',
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                'post_date'             => '',
+               '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">        $postarr = wp_parse_args( $postarr, $defaults );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -3835,25 +3837,11 @@
</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">-         * If the post date is empty (due to having been new or a draft) and status
-        * is not 'draft' or 'pending', set date to now.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+  * Resolve the post date from any provided post date or post date GMT strings;
+        * if none are provided, the date will be set to now.
</ins><span class="cx" style="display: block; padding: 0 10px">          */
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        if ( empty( $postarr['post_date'] ) || '0000-00-00 00:00:00' === $postarr['post_date'] ) {
-               if ( empty( $postarr['post_date_gmt'] ) || '0000-00-00 00:00:00' === $postarr['post_date_gmt'] ) {
-                       $post_date = current_time( 'mysql' );
-               } else {
-                       $post_date = get_date_from_gmt( $postarr['post_date_gmt'] );
-               }
-       } else {
-               $post_date = $postarr['post_date'];
-       }
-
-       // Validate the date.
-       $mm         = substr( $post_date, 5, 2 );
-       $jj         = substr( $post_date, 8, 2 );
-       $aa         = substr( $post_date, 0, 4 );
-       $valid_date = wp_checkdate( $mm, $jj, $aa, $post_date );
-       if ( ! $valid_date ) {
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $post_date = wp_resolve_post_date( $postarr['post_date'], $postarr['post_date_gmt'] );
+       if ( ! $post_date ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                 if ( $wp_error ) {
</span><span class="cx" style="display: block; padding: 0 10px">                        return new WP_Error( 'invalid_date', __( 'Invalid date.' ) );
</span><span class="cx" style="display: block; padding: 0 10px">                } else {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -4539,6 +4527,43 @@
</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><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ * Uses wp_checkdate to return a valid Gregorian-calendar value for post_date.
+ * If post_date is not provided, this first checks post_date_gmt if provided,
+ * then falls back to use the current time.
+ *
+ * For back-compat purposes in wp_insert_post, an empty post_date and an invalid
+ * post_date_gmt will continue to return '1970-01-01 00:00:00' rather than false.
+ *
+ * @since 5.7.0
+ *
+ * @param string $post_date     The date in mysql format.
+ * @param string $post_date_gmt The GMT date in mysql format.
+ * @return string|false A valid Gregorian-calendar date string, or false on failure.
+ */
+function wp_resolve_post_date( $post_date = '', $post_date_gmt = '' ) {
+       // If the date is empty, set the date to now.
+       if ( empty( $post_date ) || '0000-00-00 00:00:00' === $post_date ) {
+               if ( empty( $post_date_gmt ) || '0000-00-00 00:00:00' === $post_date_gmt ) {
+                       $post_date = current_time( 'mysql' );
+               } else {
+                       $post_date = get_date_from_gmt( $post_date_gmt );
+               }
+       }
+
+       // Validate the date.
+       $month = substr( $post_date, 5, 2 );
+       $day   = substr( $post_date, 8, 2 );
+       $year  = substr( $post_date, 0, 4 );
+
+       $valid_date = wp_checkdate( $month, $day, $year, $post_date );
+
+       if ( ! $valid_date ) {
+               return false;
+       }
+       return $post_date;
+}
+
+/**
</ins><span class="cx" style="display: block; padding: 0 10px">  * Computes a unique slug for the post, when given the desired slug and some post details.
</span><span class="cx" style="display: block; padding: 0 10px">  *
</span><span class="cx" style="display: block; padding: 0 10px">  * @since 2.8.0
</span></span></pre></div>
<a id="trunktestsphpunittestspostphp"></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.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/post.php        2021-01-25 00:08:02 UTC (rev 50011)
+++ trunk/tests/phpunit/tests/post.php  2021-01-25 01:06:25 UTC (rev 50012)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1395,4 +1395,246 @@
</span><span class="cx" style="display: block; padding: 0 10px">                $tags = wp_get_post_tags( $post->ID, array( 'fields' => 'ids' ) );
</span><span class="cx" style="display: block; padding: 0 10px">                $this->assertSameSets( array( $tag_2['term_id'], $tag_3['term_id'] ), $tags );
</span><span class="cx" style="display: block; padding: 0 10px">        }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+       /**
+        * @ticket 52187
+        */
+       public function test_insert_empty_post_date() {
+               $post_date_gmt = '2020-12-29 10:11:45';
+               $invalid_date  = '2020-12-41 14:15:27';
+
+               // Empty post_date_gmt with floating status
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_status' => 'draft',
+                       )
+               );
+               $post    = get_post( $post_id );
+               $this->assertEqualsWithDelta( strtotime( gmdate( 'Y-m-d H:i:s' ) ), strtotime( $post->post_date ), 2, 'The dates should be equal' );
+               $this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date_gmt' => '0000-00-00 00:00:00',
+                               'post_status'   => 'draft',
+                       )
+               );
+               $post    = get_post( $post_id );
+               $this->assertEqualsWithDelta( strtotime( gmdate( 'Y-m-d H:i:s' ) ), strtotime( $post->post_date ), 2, 'The dates should be equal' );
+               $this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+
+               // Empty post_date_gmt without floating status
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_status' => 'publish',
+                       )
+               );
+               $post    = get_post( $post_id );
+               $this->assertEqualsWithDelta( strtotime( gmdate( 'Y-m-d H:i:s' ) ), strtotime( $post->post_date ), 2, 'The dates should be equal' );
+               $this->assertEqualsWithDelta( strtotime( gmdate( 'Y-m-d H:i:s' ) ), strtotime( get_gmt_from_date( $post->post_date ) ), 2, 'The dates should be equal' );
+
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date_gmt' => '0000-00-00 00:00:00',
+                               'post_status'   => 'publish',
+                       )
+               );
+               $post    = get_post( $post_id );
+               $this->assertEqualsWithDelta( strtotime( gmdate( 'Y-m-d H:i:s' ) ), strtotime( $post->post_date ), 2, 'The dates should be equal' );
+               $this->assertEqualsWithDelta( strtotime( gmdate( 'Y-m-d H:i:s' ) ), strtotime( get_gmt_from_date( $post->post_date ) ), 2, 'The dates should be equal' );
+
+               // Valid post_date_gmt
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date_gmt' => $post_date_gmt,
+                       )
+               );
+               $post    = get_post( $post_id );
+               $this->assertEquals( get_date_from_gmt( $post_date_gmt ), $post->post_date );
+               $this->assertEquals( $post_date_gmt, $post->post_date_gmt );
+
+               // Invalid post_date_gmt
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date_gmt' => $invalid_date,
+                       )
+               );
+               $post    = get_post( $post_id );
+               $this->assertEquals( '1970-01-01 00:00:00', $post->post_date );
+               $this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+       }
+
+       /**
+        * @ticket 52187
+        */
+       public function test_insert_valid_post_date() {
+               $post_date     = '2020-12-28 11:26:35';
+               $post_date_gmt = '2020-12-29 10:11:45';
+               $invalid_date  = '2020-12-41 14:15:27';
+
+               // Empty post_date_gmt with floating status
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date'   => $post_date,
+                               'post_status' => 'draft',
+                       )
+               );
+               $post    = get_post( $post_id );
+               $this->assertEquals( $post_date, $post->post_date );
+               $this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date'     => $post_date,
+                               'post_date_gmt' => '0000-00-00 00:00:00',
+                               'post_status'   => 'draft',
+                       )
+               );
+               $post    = get_post( $post_id );
+               $this->assertEquals( $post_date, $post->post_date );
+               $this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+
+               // Empty post_date_gmt without floating status
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date'   => $post_date,
+                               'post_status' => 'publish',
+                       )
+               );
+               $post    = get_post( $post_id );
+               $this->assertEquals( $post_date, $post->post_date );
+               $this->assertEquals( get_gmt_from_date( $post_date ), $post->post_date_gmt );
+
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date'     => $post_date,
+                               'post_date_gmt' => '0000-00-00 00:00:00',
+                               'post_status'   => 'publish',
+                       )
+               );
+               $post    = get_post( $post_id );
+               $this->assertEquals( $post_date, $post->post_date );
+               $this->assertEquals( get_gmt_from_date( $post_date ), $post->post_date_gmt );
+
+               // Valid post_date_gmt
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date'     => $post_date,
+                               'post_date_gmt' => $post_date_gmt,
+                       )
+               );
+               $post    = get_post( $post_id );
+               $this->assertEquals( $post_date, $post->post_date );
+               $this->assertEquals( $post_date_gmt, $post->post_date_gmt );
+
+               // Invalid post_date_gmt
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date'     => $post_date,
+                               'post_date_gmt' => $invalid_date,
+                       )
+               );
+               $post    = get_post( $post_id );
+               $this->assertEquals( $post_date, $post->post_date );
+               $this->assertEquals( '0000-00-00 00:00:00', $post->post_date_gmt );
+       }
+
+       /**
+        * @ticket 52187
+        */
+       public function test_insert_invalid_post_date() {
+               $post_date     = '2020-12-28 11:26:35';
+               $post_date_gmt = '2020-12-29 10:11:45';
+               $invalid_date  = '2020-12-41 14:15:27';
+
+               // Empty post_date_gmt with floating status
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date'   => $invalid_date,
+                               'post_status' => 'draft',
+                       )
+               );
+               $this->assertEquals( 0, $post_id );
+
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date'     => $invalid_date,
+                               'post_date_gmt' => '0000-00-00 00:00:00',
+                               'post_status'   => 'draft',
+                       )
+               );
+               $this->assertEquals( 0, $post_id );
+
+               // Empty post_date_gmt without floating status
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date'   => $invalid_date,
+                               'post_status' => 'publish',
+                       )
+               );
+               $this->assertEquals( 0, $post_id );
+
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date'     => $invalid_date,
+                               'post_date_gmt' => '0000-00-00 00:00:00',
+                               'post_status'   => 'publish',
+                       )
+               );
+               $this->assertEquals( 0, $post_id );
+
+               // Valid post_date_gmt
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date'     => $invalid_date,
+                               'post_date_gmt' => $post_date_gmt,
+                       )
+               );
+               $this->assertEquals( 0, $post_id );
+
+               // Invalid post_date_gmt
+               $post_id = self::factory()->post->create(
+                       array(
+                               'post_date'     => $invalid_date,
+                               'post_date_gmt' => $invalid_date,
+                       )
+               );
+               $this->assertEquals( 0, $post_id );
+       }
+
+       /**
+        * @ticket 52187
+        */
+       function test_wp_resolve_post_date() {
+               $post_date     = '2020-12-28 11:26:35';
+               $post_date_gmt = '2020-12-29 10:11:45';
+               $invalid_date  = '2020-12-41 14:15:27';
+
+               $resolved_post_date = wp_resolve_post_date();
+               $this->assertEqualsWithDelta( strtotime( gmdate( 'Y-m-d H:i:s' ) ), strtotime( $resolved_post_date ), 2, 'The dates should be equal' );
+
+               $resolved_post_date = wp_resolve_post_date( '', $post_date_gmt );
+               $this->assertEquals( get_date_from_gmt( $post_date_gmt ), $resolved_post_date );
+
+               $resolved_post_date = wp_resolve_post_date( '', $invalid_date );
+               $this->assertEquals( '1970-01-01 00:00:00', $resolved_post_date );
+
+               $resolved_post_date = wp_resolve_post_date( $post_date );
+               $this->assertEquals( $post_date, $resolved_post_date );
+
+               $resolved_post_date = wp_resolve_post_date( $post_date, $post_date_gmt );
+               $this->assertEquals( $post_date, $resolved_post_date );
+
+               $resolved_post_date = wp_resolve_post_date( $post_date, $invalid_date );
+               $this->assertEquals( $post_date, $resolved_post_date );
+
+               $resolved_post_date = wp_resolve_post_date( $invalid_date );
+               $this->assertFalse( $resolved_post_date );
+
+               $resolved_post_date = wp_resolve_post_date( $invalid_date, $post_date_gmt );
+               $this->assertFalse( $resolved_post_date );
+
+               $resolved_post_date = wp_resolve_post_date( $invalid_date, $invalid_date );
+               $this->assertFalse( $resolved_post_date );
+       }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre>
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