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<title>[5128] sites/trunk/api.wordpress.org/public_html/events/1.0: Events API: Return the name of a city when passed coordinates</title>
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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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