Ruuter DSL to launch services based on intents

[turnerrainer]

AS A Product Owner
I WANT Services to be launched based on detected intents if they exist
SO THAT End Clients could use (gov) e-services where via chat when applicable

Acceptance Criteria

• Add an additional step to Ruuter DSL to validate from an approriate Postgres database if Rasa response has a matching Service
• Keep all other functionalities as they are right now

Scope

• Ruuter DSL accepting End Client's requests
• A database table called service_triggers linking intents and Services

Prerequisites

• Ruuter REST calls with dynamic request structures Ruuter#271

Intended workflow nr. 1

• The End Client sends a message "Tere" ("Hello" in Estonian)
• Ruuter sends the request AS IS to Rasa, which responds with "Kuidas saan abiks olla?"
• Ruuter does not detect # as the first character of Rasa's response, so passes the response AS IS to the End Client

Intended workflow nr. 2

• The End Client sends a message "Ilm Tallinnas" ("What's the weather like in Tallinn" in Estonian)
• Ruuter sends the request AS IS to Rasa, which responds with "#weather; Tallinn;"
• Ruuter detects # as the first character of Rasa's response, so passes weather to Postgres to validate if there's a matching Services linked to it
• If a matching Service exists, it will be triggered by Ruuter as a standard REST call to an external endpoint
• The response received from the external endpoint is added to Bürokratt's Chat database

Intended workflow nr. 2

• The End Client sends a message "Ilm Tallinnas" ("What's the weather like in Tallinn" in Estonian)
• Ruuter sends the request AS IS to Rasa, which responds with "#weather; Tallinn;"
• Ruuter detects # as the first character of Rasa's response, so passes weather to Postgres to validate if there's a matching Services linked to it
• If a matching Service does not exist, a response indicating that the Service is currently unavailable is sent as a predefined i18s key called service_currently_unavailable

[KlviG]

checkservice:
  switch:
    - condition: ${incoming.body.list[0] === "#weather"}
      next: weatherService
    - condition: ${incoming.body.list[0] == null}
      next: noService
  next: noService

weatherService:
  call: http.post
  args:
    url: https://ruuter.buerokratt.something.ee/get-things
    body:
     locationName: ${incoming.body.list[1]}
     chatId: ${incoming.body.chatId}
     authorId: ${incoming.body.authorId}
  result: weatherRequest
  next: end

noService:
  return: "${incoming.body.list[0]} , NO_SERVICE"
  status: 400
  next: end