ZP-1013 iOS does not send meeting response.

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

src/backend/kopano/mapiprovider.php

@@ -588,8 +588,15 @@ class MAPIProvider {
             $props = $this->getProps($mapimessage, $meetingrequestproperties);
 
             // Get the GOID
-            if(isset($props[$meetingrequestproperties["goidtag"]]))
-                $message->meetingrequest->globalobjid = base64_encode($props[$meetingrequestproperties["goidtag"]]);
+            if(isset($props[$meetingrequestproperties["goidtag"]])) {
+                // GlobalObjId support was removed in AS 16.0
+                if (Request::IsGlobalObjIdHexClient()) {
+                    $message->meetingrequest->globalobjid = bin2hex($props[$meetingrequestproperties["goidtag"]]);
+                }
+                else {
+                    $message->meetingrequest->globalobjid = base64_encode($props[$meetingrequestproperties["goidtag"]]);
+                }
+            }
 
             // Set Timezone
             if(isset($props[$meetingrequestproperties["timezonetag"]]))

src/lib/request/request.php

@@ -654,6 +654,32 @@ class Request {
         return (time() - $_SERVER["REQUEST_TIME"]) >= self::GetExpectedConnectionTimeout();
     }
 
+    /**
+     * Checks the device type if it expects the globalobjid in meeting requests encoded as hex.
+     * If it's not the case, globalobjid will be base64 encoded.
+     *
+     * WindowsOutlook and iOS device since 9.3 (?) version expect globalobjid to be hex encoded.
+     * @see https://jira.z-hub.io/projects/ZP/issues/ZP-1013
+     *
+     * @access public
+     * @return boolean
+     */
+    static public function IsGlobalObjIdHexClient() {
+        switch (self::GetDeviceType()) {
+            case "WindowsOutlook":
+                ZLog::Write(LOGLEVEL_DEBUG, "Request->IsGlobalObjIdHexClient(): WindowsOutlook");
+                return true;
+            case "iPod":
+            case "iPad":
+            case "iPhone":
+                $matches = array();
+                if (stripos(self::GetUserAgent(), "Apple-") == 0 && preg_match("/\/(\d{4})\./", self::GetUserAgent(), $matches) && isset($matches[1]) && $matches[1] >= 1305) {
+                    ZLog::Write(LOGLEVEL_DEBUG, sprintf("Request->IsGlobalObjIdHexClient(): %s->%s", self::GetDeviceType(), self::GetUserAgent()));
+                    return true;
+                }
+        }
+        return false;
+    }
     /**----------------------------------------------------------------------------------------------------------
      * Private stuff
      */