Support AI reply for articles

[MrOrz]

Design doc: https://g0v.hackmd.io/@cofacts/rd/%2F%40cofacts%2FrknFrmdk3

• AIResponse type has been extended to an interface, with AIReply being one of the implementation
  • In the future we may leverage OpenAI's whisper for speech-to-text. Its response is slightly different (no usage field).
  • Thus it makes sense we use different object types to model these different AI responses.
• CreateAIReply mutation that returns AIReply
  • As planned in design doc
  • It creates an AIResponse with its type being AIReply, and status being LOADING initially, turns SUCCESS (or FAIL) after ChatGPT API returns.
  • If there is another process that inserted a loading AIReply, CreateAIReply will start polling Elasticsearch until one of the following happens:
    • Any AIReply for the article turns "SUCCESS"
    • There are no loading AI Replies in the latest 1 minute anymore
• aiReplies field in Article
  • As planned in design doc
• Move delayForMs to under src/util/
  • Because it's also used in resolver logic now

Article's aiReplies

[coveralls]

Coverage: 88.029% (+0.03%) from 88.003% when pulling f2f9aa9 on ai-response into 7886f6d on master.

[MrOrz]

Deploy steps

1. npm run schema -- airesponses in rumors-db
2. Supply OPENAI_API_KEY to API env
3. Update API server