Endpoint to get partial chat messages data for mobile sync

[sojharo]

We just discussed the new logic of sync. In this, we discussed that server should not send all the messages to the mobile on sync. It should send only received messages and within them only those messages which are not on device yet.

For this, we would create an endpoint on server so that mobile device will use this endpoint to get partial chat messages data from server and not all chat messages data.

@sumairasaeed @jekram

[sojharo]

This is done and server now also sends the partial chat messages data for sync.

The endpoint is /api/userchat/partialchatsync

[jekram]

Thanks