+function start_filters($hook_args) {
+ global $imapServerAddress, $imapPort, $imap_stream_options, $imap_stream,
+ $imapConnection, $UseSeparateImapConnection, $AllowSpamFilters,
+ $filter_inbox_count, $username;
+
+ // if there were filtering errors previously during
+ // this login session, we won't try again
+ //
+ // (errors that this plugin was able to catch or a "NO"
+ // response/failure from IMAP found in the current session,
+ // which could have resulted from an attempted filter copy
+ // (over quota), in which case execution halts before this
+ // plugin can catch the problem -- note, however, that any
+ // other IMAP "NO" failure (caused by unrelated actions) at
+ // any time during the current session will cause this plugin
+ // to effectively shut down)
+ //
+ sqgetGlobalVar('filters_error', $filters_error, SQ_SESSION, FALSE);
+ sqgetGlobalVar('IMAP_FATAL_ERROR_TYPE', $imap_fatal_error, SQ_SESSION, '');
+ if ($filters_error || $imap_fatal_error == 'NO')
+ return;
+
+ /**
+ * check hook that calls filtering. If filters are called by right_main_after_header,
+ * do filtering only when we are in INBOX folder.
+ */
+ if ($hook_args[0]=='right_main_after_header' &&
+ (sqgetGlobalVar('mailbox',$mailbox,SQ_FORM) && $mailbox!='INBOX')) {
+ return;
+ }
+
+ $filters = load_filters();
+
+ // No point running spam filters if there aren't any to run //
+ if ($AllowSpamFilters) {
+ $spamfilters = load_spam_filters();
+
+ $AllowSpamFilters = false;
+ foreach($spamfilters as $value) {
+ if ($value['enabled'] == SMPREF_ON) {
+ $AllowSpamFilters = true;
+ break;
+ }
+ }
+ }
+
+ // No user filters, and no spam filters, no need to continue //
+ if (!$AllowSpamFilters && empty($filters)) {
+ return;
+ }