Getting List of Changes of calender items

[pjwj]

Hi,
I tried to get changed calender items using the code in the example in "getListOfChanges.php".
The response I got for the SyncFolderItems request was right at first and the SyncState Attribute was changed. However, when I tried to get further changes from the calender using the changed SyncState, I got the exact same response containing the same changes again.
Do you know of anything I need to do between to calls SyncFolderItems to not get the same changes again? Or is my understanding of syncing items with the server wrong?

(I tried syncing twice in a row with EWS Editor and it worked as I expected it, I got no changes anymore on second call.)

[Garethp]

Huh, weird. Can you show me your code where you try do do the tdwo syncs with different SyncStates?

[pjwj]

This is how I use listChanges with sync state:

$api = API::withUsernameAndPassword($server, $user, $pass, $options);
$calendar = $api->getCalendar();

$changes = $calendar->listChanges();

$syncState = $changes->getSyncState();

//first call of listChanges() with syncState
$changesSinceLastCheck = $calendar->listChanges($syncState);
$syncState2 = $changesSinceLastCheck->getSyncState();

//second call of listChanges() with syncState
$changesSinceLastCheck2 = $calendar->listChanges($syncState2);

$createdElements = $changesSinceLastCheck->getChanges()->getCreate();
$createdElements2 = $changesSinceLastCheck->getChanges()->getCreate();


//dump subject texts for elements listed by first call
foreach ($createdElements as $element) {
    $elementWithBody = $calendar->getCalendarItem($element->getCalendarItem()->getItemId()->getId(), $element->getCalendarItem()->getItemId()->getChangeKey());
    var_dump($elementWithBody->getSubject());
}

//dump subject texts for elements listed by second call
foreach ($createdElements2 as $element) {
    $elementWithBody = $calendar->getCalendarItem($element->getCalendarItem()->getItemId()->getId(), $element->getCalendarItem()->getItemId()->getChangeKey());
    var_dump($elementWithBody->getSubject());
}

[Garethp]

Just to double check, is that what you've got in your source code? Because

$createdElements = $changesSinceLastCheck->getChanges()->getCreate();
$createdElements2 = $changesSinceLastCheck->getChanges()->getCreate();

are both reading from the same $changesSinceLastCheck, when $createdElements2 should be reading from $changesSinceLastCheck2 instead.

Also, a tip: If you already have the completed itemId (like from getItemId()), you can bypass the getCalendarItem() function for more readability. For example

$elementWithBody = $calendar->getItem($element->getCalendarItem()->getItemId());

Also, maybe it would be a good idea to dump the ItemId of the elements instead of the subject? That way you have a better way to see if they're the same item or just two items with the same subject?

[pjwj]

Thank you! It works now, changing the second $changesSinceLastCheck to $changesSinceLastCheck2, my dumb mistake.

[Garethp]

No problem :) I'm glad it worked for you. I don't use that function, so I didn't know if there was a bug or not. I realized that I didn't unit test fetching changes when you pass in an existing syncState, so I'm writing those tests now.