scalar DateTime

################################### Payload

type Result {
  error: String
}

type MessageResult {
  error: String
  message: Message
}

enum MessageStatus {
  NEW
  UPDATED
  DELETED
}

type ChatUpdatedResult {
  error: String
  status: MessageStatus
  message: Message
}

type CreateChatResult {
  chatId: String
  error: String
}

type EnterChatResult {
  chat: Chat
  messages: [Message]
  error: String
}

################################### Mutation

type Mutation {
  # message
  createChat(description: String): CreateChatResult!
  createMessage(chatId: String!, body: String!, replyTo: Int): MessageResult!
  updateMessage(chatId: String!, id: Int!, body: String!): MessageResult!
  deleteMessage(chatId: String!, id: Int!): Result!
}

################################### Query

type Query {
  # messages
  enterChat(chatId: String!, size: Int = 50): EnterChatResult!
  getMessages(chatId: String!, size: Int!, page: Int!): [Message]!
}

############################################ Subscription

type Subscription {
  chatUpdated(chatId: String!): ChatUpdatedResult!
}

############################################ Entities


type Message {
  author: String!
  chatRoom: Int!
  body: String!
  createdAt: DateTime!
  id: Int!
  replyTo: Int
  updatedAt: DateTime!
  visibleForUsers: [Int]!
}

type Chat {
  id: Int!
  createdAt: DateTime!
  updatedAt: DateTime!
  description: String
}