ZP-1188 Check if OOF expired and disabled it if needed.

Released under the Affero GNU General Public License (AGPL) version 3.

src/backend/kopano/kopano.php

@@ -1737,8 +1737,16 @@ class BackendKopano implements IBackend, ISearchProvider {
             $oof->oofmessage[] = $oofmessage;
 
             // check whether time based out of office is set
-            if ($oof->oofstate == SYNC_SETTINGSOOF_GLOBAL && isset($oofprops[PR_EC_OUTOFOFFICE_FROM]) && isset($oofprops[PR_EC_OUTOFOFFICE_UNTIL])) {
-                if ($oofprops[PR_EC_OUTOFOFFICE_FROM] < $oofprops[PR_EC_OUTOFOFFICE_UNTIL]) {
+            if ($oof->oofstate == SYNC_SETTINGSOOF_GLOBAL && isset($oofprops[PR_EC_OUTOFOFFICE_FROM], $oofprops[PR_EC_OUTOFOFFICE_UNTIL])) {
+                $now = time();
+                if ($now > $oofprops[PR_EC_OUTOFOFFICE_FROM] && $now > $oofprops[PR_EC_OUTOFOFFICE_UNTIL]) {
+                    // Out of office is set but the date is in the past. Set the state to disabled.
+                    // @see https://jira.z-hub.io/browse/ZP-1188 for details
+                    $oof->oofstate = SYNC_SETTINGSOOF_DISABLED;
+                    @mapi_deleteprops($this->defaultstore, array(PR_EC_OUTOFOFFICE_FROM, PR_EC_OUTOFOFFICE_UNTIL));
+                    ZLog::Write(LOGLEVEL_INFO, "BackendKopano->settingsOofGet(): Out of office is set but the from and until are in the past. Disabling out of office.");
+                }
+                elseif ($oofprops[PR_EC_OUTOFOFFICE_FROM] < $oofprops[PR_EC_OUTOFOFFICE_UNTIL]) {
                     $oof->oofstate = SYNC_SETTINGSOOF_TIMEBASED;
                     $oof->starttime = $oofprops[PR_EC_OUTOFOFFICE_FROM];
                     $oof->endtime = $oofprops[PR_EC_OUTOFOFFICE_UNTIL];