model.ts

type ID = number

type Developer = {
  id: ID
  githubLogin: string
}

type Posting = {
  id: ID
  host: Developer
  createdAt: Date
  technologies: string[]
  meansOfCommunication: string
  description: string
  state: PostingState
}

enum PostingState {
  'active',
  'partner_found',
  'expired',
  'cancelled'
}

type JoinRequest = {
  id: ID
  posting: Posting
  requestee: Developer
  state: JoinRequestState
}

enum JoinRequestState {
  'pending',
  'accepted',
  'rejected',
  'expired'
}

type PairProgrammingSession = {
  id: ID
  posting: Posting
  partner: Developer
  state: PairProgrammingSessionState
}

enum PairProgrammingSessionState {
  'active',
  'finished'
}

type Actions = {
  posting: {
    getAllActive (id: ID): Posting[]

    create (posting: Posting): Posting
    cancel (posting: Posting): Posting
    expire (posting: Posting): Posting
    prolong (posting: Posting): Posting
  }
  joinRequest: {
    send (posting: Posting, requestee: Developer): JoinRequest
    accept (request: JoinRequest): PairProgrammingSession
    reject (request: JoinRequest): JoinRequest
  }
  pairProgrammingSession: {
    finish (session: PairProgrammingSession): PairProgrammingSession
  }
}