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support use cases in service #1

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Holayn opened this issue Apr 12, 2020 · 0 comments
Open
5 of 12 tasks

support use cases in service #1

Holayn opened this issue Apr 12, 2020 · 0 comments

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@Holayn
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Holayn commented Apr 12, 2020 •
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  • get all chat messages for a session
    • this is supported by chat table having a partition & sort key
    • can take advantage of BatchGetItem
  • get all sessions for a user
    • can use secondary index
  • get a user's name
  • start a chat with a user
    • for each user create a new item in session table of type regular using same session id
  • send a message to a user
    • add item to chat table

advanced use-cases:

  • delete a message in a chat
    • remove item from chat table
  • delete a chat with a user
    • delete entry containing session-id & user-id from session table
    • if no session table no longer contains session-id, delete entries from chat table
  • create a group chat
    • for each user, create a new item in session table of type group using same session id
  • send a message to a group chat
    • add item to chat table
  • delete a message from a group chat
    • remove item from chat table
  • delete a group chat
    • delete entry containing session-id & user-id from session table
    • if no session table no longer contains session-id, delete entries from chat table
  • support sticker
    • add a new item in chat table with type "sticker"
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@Holayn