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-rw-r--r--engine/lib/annotations.php23
1 files changed, 23 insertions, 0 deletions
diff --git a/engine/lib/annotations.php b/engine/lib/annotations.php
index b18475d57..b7dc1b9d3 100644
--- a/engine/lib/annotations.php
+++ b/engine/lib/annotations.php
@@ -1250,6 +1250,29 @@ function get_annotation_url($id) {
return false;
}
+/**
+ * Check to see if a user has already created an annotation on an object
+ *
+ * @param ElggEntity $entity
+ * @return true | false
+ */
+function elgg_already_created_annotation($entity_guid, $annotation_type) {
+ global $CONFIG;
+ $entity_guid = (int)$entity_guid;
+ $annotation_type = sanitise_string($annotation_type);
+ $owner_guid = get_loggedin_userid();
+ $sql = "select a.id" .
+ " FROM {$CONFIG->dbprefix}annotations a, {$CONFIG->dbprefix}metastrings m " .
+ " WHERE a.owner_guid={$owner_guid} AND a.entity_guid={$entity_guid} " .
+ " AND a.name_id=m.id AND m.string='{$annotation_type}'";
+ //get the annotation type id
+ $check_annotation = get_data_row($sql);
+ //check to see if the user has already liked
+ if($check_annotation)
+ return true;
+ else
+ return false;
+}
/**
* Register an annotation url handler.