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'* per Marcel, Comments may have a more complex set of references/relationships than Messages to Users have. Rather than just 'inReplyTo', it might be that one Comment is an 'answer' to another comment which is a question. Further, the multiple answers to a question may have 'previous' references which order them.
Message sender (worker)
- Extend ObjectType to include a "MESSAGE" type
- Have DBOMessage extend ObservableEntity and TaggableEntity
- Send a change message when a message is created
- Subscribe worker to the repo-changes topic
- Look for MESSAGE-CREATED changes to process
- The worker should always check to see if a message has already been sent, so that messages do not get resent every time the stack changes.
- A message has been sent if there is a recipient. The worker is in charge of making sure all sent messages have at least one recipient. In the case where a user sends a message to multiple recipients, all of which are not visible to the user, then the worker should bounce the message back to the user, along with a bounce message. This ensures the message has a row in the MessageStatus table.
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