+
+ // setOnBehalfUser sets on behalf user both the object and the session.
+ function setOnBehalfUser($user_id) {
+
+ // Unset things first.
+ $this->behalf_id = null;
+ $this->behalf_name = null;
+ unset($this->behalfUser);
+ unset($_SESSION['behalf_id']);
+ unset($_SESSION['behalf_name']);
+
+ // No need to set if user is us.
+ if ($user_id == $this->id) return;
+
+ // No need to set if user id is not valid.
+ if (!$this->isUserValid($user_id)) return;
+
+ // We are good to set on behalf user.
+ $onBehalfUserName = ttUserHelper::getUserName($user_id);
+ $_SESSION['behalf_id'] = $user_id;
+ $_SESSION['behalf_name'] = $onBehalfUserName;
+ $this->behalf_id = $user_id;
+ $this->behalf_name = $onBehalfUserName;
+
+ $this->behalfUser = new ttBehalfUser($this->behalf_id, $this->org_id);
+ return;
+ }
+
+ // The exists() function determines if an active user exists in context of a page.
+ // If we are working as self, true.
+ // If we are working in a subgroup with active users, true.
+ // If we are working in a subgroup without active users, false.
+ function exists() {
+ if (!$this->behalfGroup)
+ return true; // Working as self.
+ else if ($this->behalfGroup->active_users)
+ return true; // Subgroup has users.
+
+ return false;
+ }