1 files changed, 121 insertions, 0 deletions
diff --git a/engine/lib/statistics.php b/engine/lib/statistics.php
new file mode 100644
index 000000000..5ee640549
--- /dev/null
+++ b/engine/lib/statistics.php
@@ -0,0 +1,121 @@
+<?php
+/**
+ * Elgg statistics library.
+ *
+ * This file contains a number of functions for obtaining statistics about the running system.
+ * These statistics are mainly used by the administration pages, and is also where the basic
+ * views for statistics are added.
+ *
+ * @package Elgg.Core
+ * @subpackage Statistics
+ */
+
+/**
+ * Return an array reporting the number of various entities in the system.
+ *
+ * @param int $owner_guid Optional owner of the statistics
+ *
+ * @return array
+ */
+function get_entity_statistics($owner_guid = 0) {
+	global $CONFIG;
+
+	$entity_stats = array();
+	$owner_guid = (int)$owner_guid;
+
+	$query = "SELECT distinct e.type,s.subtype,e.subtype as subtype_id
+		from {$CONFIG->dbprefix}entities e left
+		join {$CONFIG->dbprefix}entity_subtypes s on e.subtype=s.id";
+
+	$owner_query = "";
+	if ($owner_guid) {
+		$query .= " where owner_guid=$owner_guid";
+		$owner_query = "and owner_guid=$owner_guid ";
+	}
+
+	// Get a list of major types
+
+	$types = get_data($query);
+	foreach ($types as $type) {
+		// assume there are subtypes for now
+		if (!is_array($entity_stats[$type->type])) {
+			$entity_stats[$type->type] = array();
+		}
+
+		$query = "SELECT count(*) as count
+			from {$CONFIG->dbprefix}entities where type='{$type->type}' $owner_query";
+
+		if ($type->subtype) {
+			$query .= " and subtype={$type->subtype_id}";
+		}
+
+		$subtype_cnt = get_data_row($query);
+
+		if ($type->subtype) {
+			$entity_stats[$type->type][$type->subtype] = $subtype_cnt->count;
+		} else {
+			$entity_stats[$type->type]['__base__'] = $subtype_cnt->count;
+		}
+	}
+
+	return $entity_stats;
+}
+
+/**
+ * Return the number of users registered in the system.
+ *
+ * @param bool $show_deactivated Count not enabled users?
+ *
+ * @return int
+ */
+function get_number_users($show_deactivated = false) {
+	global $CONFIG;
+
+	$access = "";
+
+	if (!$show_deactivated) {
+		$access = "and " . get_access_sql_suffix();
+	}
+
+	$query = "SELECT count(*) as count
+		from {$CONFIG->dbprefix}entities where type='user' $access";
+
+	$result = get_data_row($query);
+
+	if ($result) {
+		return $result->count;
+	}
+
+	return false;
+}
+
+/**
+ * Return a list of how many users are currently online, rendered as a view.
+ *
+ * @return string
+  */
+function get_online_users() {
+	$count = find_active_users(600, 10, 0, true);
+	$objects = find_active_users(600, 10);
+
+	if ($objects) {
+		return elgg_view_entity_list($objects, array(
+			'count' => $count,
+			'limit' => 10
+		));
+	}
+}
+
+/**
+ * Initialise the statistics admin page.
+ *
+ * @return void
+ * @access private
+ */
+function statistics_init() {
+	elgg_extend_view('core/settings/statistics', 'core/settings/statistics/online');
+	elgg_extend_view('core/settings/statistics', 'core/settings/statistics/numentities');
+}
+
+/// Register init function
+elgg_register_event_handler('init', 'system', 'statistics_init');