diff options
| -rw-r--r-- | engine/lib/location.php | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/engine/lib/location.php b/engine/lib/location.php index eec665234..e5a6cf062 100644 --- a/engine/lib/location.php +++ b/engine/lib/location.php @@ -81,6 +81,187 @@ return $return; } + /** + * Return entities within a given geographic area. + * + * @param real $lat Latitude + * @param real $long Longitude + * @param real $radius The radius + * @param string $type The type of entity (eg "user", "object" etc) + * @param string $subtype The arbitrary subtype of the entity + * @param int $owner_guid The GUID of the owning user + * @param string $order_by The field to order by; by default, time_created desc + * @param int $limit The number of entities to return; 10 by default + * @param int $offset The indexing offset, 0 by default + * @param boolean $count Set to true to get a count rather than the entities themselves (limits and offsets don't apply in this context). Defaults to false. + * @param int $site_guid The site to get entities for. Leave as 0 (default) for the current site; -1 for all sites. + * @param int|array $container_guid The container or containers to get entities from (default: all containers). + * @return array A list of entities. + */ + function get_entities_in_area($lat, $long, $radius, $type = "", $subtype = "", $owner_guid = 0, $order_by = "", $limit = 10, $offset = 0, $count = false, $site_guid = 0, $container_guid) + { + global $CONFIG; + + if ($subtype === false || $subtype === null || $subtype === 0) + return false; + + $lat = (real)$lat; + $long = (real)$long; + $radius = (real)$radius; + + $order_by = sanitise_string($order_by); + $limit = (int)$limit; + $offset = (int)$offset; + $site_guid = (int) $site_guid; + if ($site_guid == 0) + $site_guid = $CONFIG->site_guid; + + $where = array(); + + if (is_array($type)) { + $tempwhere = ""; + if (sizeof($type)) + foreach($type as $typekey => $subtypearray) { + foreach($subtypearray as $subtypeval) { + $typekey = sanitise_string($typekey); + if (!empty($subtypeval)) { + $subtypeval = (int) get_subtype_id($typekey, $subtypeval); + } else { + $subtypeval = 0; + } + if (!empty($tempwhere)) $tempwhere .= " or "; + $tempwhere .= "(e.type = '{$typekey}' and e.subtype = {$subtypeval})"; + } + } + if (!empty($tempwhere)) $where[] = "({$tempwhere})"; + + } else { + + $type = sanitise_string($type); + $subtype = get_subtype_id($type, $subtype); + + if ($type != "") + $where[] = "e.type='$type'"; + if ($subtype!=="") + $where[] = "e.subtype=$subtype"; + + } + + if ($owner_guid != "") { + if (!is_array($owner_guid)) { + $owner_array = array($owner_guid); + $owner_guid = (int) $owner_guid; + $where[] = "e.owner_guid = '$owner_guid'"; + } else if (sizeof($owner_guid) > 0) { + $owner_array = array_map('sanitise_int', $owner_guid); + // Cast every element to the owner_guid array to int + $owner_guid = implode(",",$owner_guid); // + $where[] = "e.owner_guid in ({$owner_guid})" ; // + } + if (is_null($container_guid)) { + $container_guid = $owner_array; + } + } + + if ($site_guid > 0) + $where[] = "e.site_guid = {$site_guid}"; + + if (!is_null($container_guid)) { + if (is_array($container_guid)) { + foreach($container_guid as $key => $val) $container_guid[$key] = (int) $val; + $where[] = "e.container_guid in (" . implode(",",$container_guid) . ")"; + } else { + $container_guid = (int) $container_guid; + $where[] = "e.container_guid = {$container_guid}"; + } + } + + // Add the calendar stuff + $loc_join = " + JOIN {$CONFIG->dbprefix}metadata loc_start on e.guid=loc_start.entity_guid + JOIN {$CONFIG->dbprefix}metastrings loc_start_name on loc_start.name_id=loc_start_name.id + JOIN {$CONFIG->dbprefix}metastrings loc_start_value on loc_start.value_id=loc_start_value.id + + JOIN {$CONFIG->dbprefix}metadata loc_end on e.guid=loc_end.entity_guid + JOIN {$CONFIG->dbprefix}metastrings loc_end_name on loc_end.name_id=loc_end_name.id + JOIN {$CONFIG->dbprefix}metastrings loc_end_value on loc_end.value_id=loc_end_value.id + "; + + $lat_min = $lat - $radius; + $lat_max = $lat + $radius; + $long_min = $long - $radius; + $long_max = $long + $radius; + + $where[] = "loc_start_name.string='geo:lat'"; + $where[] = "loc_start_value.string>=$lat_min"; + $where[] = "loc_start_value.string<=$lat_max"; + $where[] = "loc_end_name.string='geo:long'"; + $where[] = "loc_end_value.string >= $long_min"; + $where[] = "loc_end_value.string <= $long_max"; + + + if (!$count) { + $query = "SELECT e.* from {$CONFIG->dbprefix}entities e $loc_join where "; + } else { + $query = "SELECT count(e.guid) as total from {$CONFIG->dbprefix}entities e $loc_join where "; + } + foreach ($where as $w) + $query .= " $w and "; + + $query .= get_access_sql_suffix('e'); // Add access controls + + if (!$count) { + $query .= " order by n.calendar_start $order_by"; + if ($limit) $query .= " limit $offset, $limit"; // Add order and limit + $dt = get_data($query, "entity_row_to_elggstar"); + return $dt; + } else { + $total = get_data_row($query); + return $total->total; + } + } + + /** + * List entities in a given location + * + * @param string $location Location + * @param string $type The type of entity (eg "user", "object" etc) + * @param string $subtype The arbitrary subtype of the entity + * @param int $owner_guid The GUID of the owning user + * @param int $limit The number of entities to display per page (default: 10) + * @param true|false $fullview Whether or not to display the full view (default: true) + * @param true|false $viewtypetoggle Whether or not to allow gallery view + * @param true|false $pagination Display pagination? Default: true + * @return string A viewable list of entities + */ + function list_entities_location($location, $type= "", $subtype = "", $owner_guid = 0, $limit = 10, $fullview = true, $viewtypetoggle = false, $navigation = true) { + return list_entities_from_metadata('location', $location, $type, $subtype, $owner_guid, $limit, $fullview, $viewtypetoggle, $navigation); + } + + /** + * List items within a given geographic area. + * + * @param real $lat Latitude + * @param real $long Longitude + * @param real $radius The radius + * @param string $type The type of entity (eg "user", "object" etc) + * @param string $subtype The arbitrary subtype of the entity + * @param int $owner_guid The GUID of the owning user + * @param int $limit The number of entities to display per page (default: 10) + * @param true|false $fullview Whether or not to display the full view (default: true) + * @param true|false $viewtypetoggle Whether or not to allow gallery view + * @param true|false $pagination Display pagination? Default: true + * @return string A viewable list of entities + */ + function list_entities_in_area($lat, $long, $radius, $type= "", $subtype = "", $owner_guid = 0, $limit = 10, $fullview = true, $viewtypetoggle = false, $navigation = true) { + + $offset = (int) get_input('offset'); + $count = get_entities_in_area($lat, $long, $radius, $type, $subtype, $owner_guid, "", $limit, $offset, true); + $entities = get_entities_in_area($lat, $long, $radius, $type, $subtype, $owner_guid, "", $limit, $offset); + + return elgg_view_entity_list($entities, $count, $offset, $limit, $fullview, $viewtypetoggle, $navigation); + } + // Some distances in degrees (approximate) define("MILE", 0.01515); define("KILOMETER", 0.00932); |