typeDefs.graphql

scalar DateTime

type Person {
  id: ID!
  firstName: String!
  lastName: String!
  self: Boolean!
  lastMessage: Message
  lastRead: DateTime
}

type Message {
  id: ID!
  sender: Person!
  recipient: Person!
  body: String!
  timestamp: DateTime!
}

type Query {
  self: Person!
  people: [Person!]!
  messages(personId: ID): [Message!]!
}

interface MutationResponse {
  code: String!
  success: Boolean!
  message: String!
}

type SendMessageMutationResponse implements MutationResponse {
  code: String!
  success: Boolean!
  message: String!
  result: Message
}

type MarkReadMutationResponse implements MutationResponse {
  code: String!
  success: Boolean!
  message: String!
  result: Person
}

type Mutation {
  sendMessage(
    messageId: ID!
    recipientId: ID!
    body: String!
  ): SendMessageMutationResponse
  markRead(personId: ID!, lastRead: DateTime!): MarkReadMutationResponse
}

type Subscription {
  messageReceived: Message
}