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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="http://meta.trac.wordpress.org/changeset/5128">5128</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"http://meta.trac.wordpress.org/changeset/5128","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>iandunn</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2017-03-08 16:32:24 +0000 (Wed, 08 Mar 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'>Events API: Return the name of a city when passed coordinates</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#sitestrunkapiwordpressorgpublic_htmlevents10indexphp">sites/trunk/api.wordpress.org/public_html/events/1.0/index.php</a></li>
<li><a href="#sitestrunkapiwordpressorgpublic_htmlevents10teststestindexphp">sites/trunk/api.wordpress.org/public_html/events/1.0/tests/test-index.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="sitestrunkapiwordpressorgpublic_htmlevents10indexphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: sites/trunk/api.wordpress.org/public_html/events/1.0/index.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- sites/trunk/api.wordpress.org/public_html/events/1.0/index.php    2017-03-08 12:11:40 UTC (rev 5127)
+++ sites/trunk/api.wordpress.org/public_html/events/1.0/index.php      2017-03-08 16:32:24 UTC (rev 5128)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -251,9 +251,10 @@
</span><span class="cx" style="display: block; padding: 0 10px">                ! empty( $args['latitude'] )  && is_numeric( $args['latitude'] ) &&
</span><span class="cx" style="display: block; padding: 0 10px">                ! empty( $args['longitude'] ) && is_numeric( $args['longitude'] )
</span><span class="cx" style="display: block; padding: 0 10px">        ) {
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                // TODO: Ensure that the data here is rounded to city-level and return the name of the city/region.
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         $city = get_city_from_coordinates( $args['latitude'], $args['longitude'] );
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 return array(
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                        'description' => "{$args['latitude']}, {$args['longitude']}",
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                 'description' => $city ? $city : "{$args['latitude']}, {$args['longitude']}",
</ins><span class="cx" style="display: block; padding: 0 10px">                         'latitude'  => $args['latitude'],
</span><span class="cx" style="display: block; padding: 0 10px">                        'longitude' => $args['longitude']
</span><span class="cx" style="display: block; padding: 0 10px">                );
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -374,6 +375,40 @@
</span><span class="cx" style="display: block; padding: 0 10px">        return $country_code;
</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">+/**
+ * Get the name of the city that's closest to the given coordinates
+ *
+ * @todo - This can probably be optimized by SELECT'ing from a derived table of the closest rows, instead of the
+ *         entire table, similar to the technique described at
+ *         http://www.techfounder.net/2009/02/02/selecting-closest-values-in-mysql/
+ *         There's only 140k rows in the table, though, so this is performant for now.
+ *
+ * @param float $latitude
+ * @param float $longitude
+ *
+ * @return false|string
+ */
+function get_city_from_coordinates( $latitude, $longitude ) {
+       global $wpdb;
+
+       $results = $wpdb->get_col( $wpdb->prepare( "
+               SELECT
+                       name,
+                       ABS( %f - latitude  ) AS latitude_distance,
+                       ABS( %f - longitude ) AS longitude_distance
+               FROM geoname
+               HAVING
+                       latitude_distance  < 0.3 AND    -- 0.3 degrees is about 30 miles
+                       longitude_distance < 0.3
+               ORDER by latitude_distance ASC, longitude_distance ASC
+               LIMIT 1",
+               $latitude,
+               $longitude
+       ) );
+
+       return isset( $results[0] ) ? $results[0] : false;
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> function get_events( $args = array() ) {
</span><span class="cx" style="display: block; padding: 0 10px">        global $wpdb, $cache_life, $cache_group;
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span></span></pre></div>
<a id="sitestrunkapiwordpressorgpublic_htmlevents10teststestindexphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: sites/trunk/api.wordpress.org/public_html/events/1.0/tests/test-index.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- sites/trunk/api.wordpress.org/public_html/events/1.0/tests/test-index.php 2017-03-08 12:11:40 UTC (rev 5127)
+++ sites/trunk/api.wordpress.org/public_html/events/1.0/tests/test-index.php   2017-03-08 16:32:24 UTC (rev 5128)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -15,6 +15,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        $failed = 0;
</span><span class="cx" style="display: block; padding: 0 10px">        $failed += test_get_location();
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        $failed += test_get_city_from_coordinates();
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px">        printf( "\n\nFinished running all tests. %d failed.\n", $failed );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -580,4 +581,67 @@
</span><span class="cx" style="display: block; padding: 0 10px">         return $cases;
</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">+/**
+ * Test `get_city_from_coordinates()`
+ *
+ * @todo This can probably be refactored along with test_get_location() into a more abstract/DRY general-purpose
+ *       test runner.
+ *
+ * @return bool The number of failures
+ */
+function test_get_city_from_coordinates() {
+       $failed = 0;
+       $cases  = get_city_from_coordinates_test_cases();
+
+       printf( "\n\nRunning %d city from coordinate tests\n", count( $cases ) );
+
+       foreach ( $cases as $case_id => $case ) {
+               $actual_result = get_city_from_coordinates( $case['input']['latitude'], $case['input']['longitude'] );
+               $passed        = $case['expected'] === $actual_result;
+
+               output_results( $case_id, $passed, $case['expected'], $actual_result );
+
+               if ( ! $passed ) {
+                       $failed++;
+               }
+       }
+
+       return $failed;
+}
+
+/**
+ * Get the cases for testing `get_city_from_coordinates()`
+ *
+ * @return array
+ */
+function get_city_from_coordinates_test_cases() {
+        $cases = array(
+               'lower-latitude-higher-longitude' => array(
+                       'input' => array(
+                               'latitude'  => '60.199',
+                               'longitude' => '24.660'
+                       ),
+                       'expected' => 'Espoo',
+               ),
+
+               'higher-latitude-lower-longitude' => array(
+                       'input' => array(
+                               'latitude'  => '22.000',
+                               'longitude' => '95.900'
+                       ),
+                       'expected' => 'Mandalay',
+               ),
+
+               'middle-of-no-and-where' => array(
+                       'input' => array(
+                               'latitude'  => '-23.121',
+                               'longitude' => '125.071'
+                       ),
+                       'expected' => false,
+               ),
+       );
+
+       return $cases;
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> run_tests();
</span></span></pre>
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