1 files changed, 84 insertions, 0 deletions
diff --git a/lib/subgroups.php b/lib/subgroups.php
new file mode 100644
index 000000000..ffa531e16
--- /dev/null
+++ b/lib/subgroups.php
@@ -0,0 +1,84 @@
+<?php
+/**
+ * Subgroups helper functions
+ *
+ * @package ElggSubgroups
+ */
+
+
+/**
+ * Gives the list of the group subgroups
+ *
+ * @param ElggGroup $group
+ * @return array
+ */
+function get_subgroups($group, $options = array()){
+	if($group instanceof ElggGroup){
+		
+		$options['type'] = 'group';
+		$options['container_guid'] = $group->guid;
+		return elgg_get_entities($options);
+		
+	} else {
+		return false;
+	}
+}
+
+function list_subgroups($group, $options = array()){
+	
+	if($group instanceof ElggGroup){
+		
+		$defaults = array(
+			'full_view' => false,
+			'pagination' => true,
+		);
+		$options = array_merge($defaults, $options);
+		
+		$options['type'] = 'group';
+		$options['container_guid'] = $group->guid;
+	
+		elgg_push_context('subgroups');
+		$list = elgg_list_entities($options);
+		elgg_pop_context();
+		
+		return $list;
+		
+	} else {
+		return "";
+	}
+}
+
+function subgroups_group_url_matches($url){
+	$url = parse_url($url);
+	$pattern1 = "/groups\/profile\/(?P<group_guid>\d+)/";
+	$pattern2 = "/g\/(?P<group_alias>[^\/]+)/";
+	
+	$matches1 = array();
+	$matches2 = array();
+	
+	preg_match($pattern1, $url['path'], $matches1);
+	preg_match($pattern2, $url['path'], $matches2);
+	
+	if(!empty($matches1) || !empty($matches2)) {
+		return array_merge($matches1, $matches2);
+	} else {
+		return false;
+	}
+}
+
+function subgroups_get_group_from_url($group_url){
+	$matches = subgroups_group_url_matches($group_url);
+	$group_guid = $matches['group_guid'];
+	$group_alias = $matches['group_alias'];
+	
+	$group = get_entity($group_guid);
+	if(!$group && elgg_is_active_plugin('group_alias')) {
+		$group = get_group_from_group_alias($group_alias);
+	}
+	
+	if($group && $group->getURL() == $group_url){
+		return $group;
+	} else {
+		return false;
+	}
+}