Two problems occured:
- when the user hadn't seen any messages of a channel, the seen_message_id
was null and doing seen_message_id < msg.id to retrieve all messages
received after the last one seen didn't return any message (null < x is
always false)
- messages sent by visitor on the livechat doesn't have any author_id, so,
again, doing msg.author_id != partner_id is always false, and as a
consequence, server-side, the messages sent by visitors were always
considered as read
Aaron Bohy
bc2d86e00f