+class SubscribeAction extends Action
+{
+ var $user;
+ var $other;
+
+ /**
+ * Check pre-requisites and instantiate attributes
+ *
+ * @param Array $args array of arguments (URL, GET, POST)
+ *
+ * @return boolean success flag
+ */
+
+ function prepare($args)
+ {
+ parent::prepare($args);
+
+ // Only allow POST requests
+
+ if ($_SERVER['REQUEST_METHOD'] != 'POST') {
+ $this->clientError(_('This action only accepts POST requests.'));
+ return false;
+ }
+
+ // CSRF protection
+
+ $token = $this->trimmed('token');
+
+ if (!$token || $token != common_session_token()) {
+ $this->clientError(_('There was a problem with your session token.'.
+ ' Try again, please.'));
+ return false;
+ }
+
+ // Only for logged-in users
+
+ $this->user = common_current_user();
+
+ if (empty($this->user)) {
+ $this->clientError(_('Not logged in.'));
+ return false;
+ }
+
+ // Profile to subscribe to
+
+ $other_id = $this->arg('subscribeto');
+
+ $this->other = Profile::staticGet('id', $other_id);