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-rw-r--r--engine/lib/location.php88
1 files changed, 86 insertions, 2 deletions
diff --git a/engine/lib/location.php b/engine/lib/location.php
index 039bb5ee0..517650e5c 100644
--- a/engine/lib/location.php
+++ b/engine/lib/location.php
@@ -212,6 +212,91 @@ $order_by = "", $limit = 10, $offset = 0, $count = false, $site_guid = 0, $conta
}
/**
+ * Return entities within a given geographic area.
+ *
+ * Also accepts all options available to elgg_get_entities().
+ *
+ * @see elgg_get_entities
+ *
+ * @param array $options Array in format:
+ *
+ * latitude => FLOAT Latitude of the location
+ *
+ * longitude => FLOAT Longitude of the location
+ *
+ * distance => FLOAT/ARR (
+ * latitude => float,
+ * longitude => float,
+ * )
+ * The distance in degrees that determines the search box. A
+ * single float will result in a square in degrees.
+ * @warning The Earth is round.
+ *
+ * @see ElggEntity::setLatLong()
+ *
+ * @return array
+ * @since 1.8.0
+ */
+function elgg_get_entities_from_location(array $options = array()) {
+
+ global $CONFIG;
+
+ if (!isset($options['latitude']) || !isset($options['longitude']) ||
+ !isset($options['distance'])) {
+ return false;
+ }
+
+ if (!is_array($options['distance'])) {
+ $lat_distance = (float)$options['distance'];
+ $long_distance = (float)$options['distance'];
+ } else {
+ $lat_distance = (float)$options['distance']['latitude'];
+ $long_distance = (float)$options['distance']['longitude'];
+ }
+
+ $lat = (float)$options['latitude'];
+ $long = (float)$options['longitude'];
+ $lat_min = $lat - $lat_distance;
+ $lat_max = $lat + $lat_distance;
+ $long_min = $long - $long_distance;
+ $long_max = $long + $long_distance;
+
+ $where = array();
+ $wheres[] = "lat_name.string='geo:lat'";
+ $wheres[] = "lat_value.string >= $lat_min";
+ $wheres[] = "lat_value.string <= $lat_max";
+ $wheres[] = "lon_name.string='geo:long'";
+ $wheres[] = "lon_value.string >= $long_min";
+ $wheres[] = "lon_value.string <= $long_max";
+
+ $joins = array();
+ $joins[] = "JOIN {$CONFIG->dbprefix}metadata lat on e.guid=lat.entity_guid";
+ $joins[] = "JOIN {$CONFIG->dbprefix}metastrings lat_name on lat.name_id=lat_name.id";
+ $joins[] = "JOIN {$CONFIG->dbprefix}metastrings lat_value on lat.value_id=lat_value.id";
+ $joins[] = "JOIN {$CONFIG->dbprefix}metadata lon on e.guid=lon.entity_guid";
+ $joins[] = "JOIN {$CONFIG->dbprefix}metastrings lon_name on lon.name_id=lon_name.id";
+ $joins[] = "JOIN {$CONFIG->dbprefix}metastrings lon_value on lon.value_id=lon_value.id";
+
+ // merge wheres to pass to get_entities()
+ if (isset($options['wheres']) && !is_array($options['wheres'])) {
+ $options['wheres'] = array($options['wheres']);
+ } elseif (!isset($options['wheres'])) {
+ $options['wheres'] = array();
+ }
+ $options['wheres'] = array_merge($options['wheres'], $wheres);
+
+ // merge joins to pass to get_entities()
+ if (isset($options['joins']) && !is_array($options['joins'])) {
+ $options['joins'] = array($options['joins']);
+ } elseif (!isset($options['joins'])) {
+ $options['joins'] = array();
+ }
+ $options['joins'] = array_merge($options['joins'], $joins);
+
+ return elgg_get_entities_from_relationship($options);
+}
+
+/**
* List entities in a given location
*
* @param string $location Location
@@ -262,9 +347,8 @@ $limit = 10, $fullview = true, $listtypetoggle = false, $navigation = true) {
}
// Some distances in degrees (approximate)
+// @todo huh? see warning on elgg_get_entities_from_location()
define("MILE", 0.01515);
define("KILOMETER", 0.00932);
// @todo get objects within x miles by entities, metadata and relationship
-
-// @todo List \ No newline at end of file