schema.json5

[
  {
    name: 'User',
    kind: 'OBJECT',
    interfaces: ['Node'],
    fields: [
      {
        name: 'id',
        type: 'ID',
        nonNull: true,
        unique: true,
      },
      {
        name: 'name',
        type: 'String',
      },
      {
        name: 'image',
        type: 'String',
      },
      {
        name: 'messages',
        type: 'Connection',
        ofType: 'Message',
        reverseName: 'sender',
      },
      {
        name: 'channels',
        type: 'Connection',
        ofType: 'Channel',
        reverseName: 'members',
      },
    ],
  },
  {
    name: 'Channel',
    kind: 'OBJECT',
    interfaces: ['Node'],
    fields: [
      {
        name: 'id',
        type: 'ID',
        nonNull: true,
        unique: true,
      },
      {
        name: 'name',
        type: 'String',
        nonNull: true,
        unique: true,
      },
      {
        name: 'members',
        type: 'Connection',
        ofType: 'User',
        reverseName: 'channels',
      },
      {
        name: 'messages',
        type: 'Connection',
        ofType: 'Message',
        reverseName: 'channel',
      },
    ],
  },
  {
    name: 'Message',
    kind: 'OBJECT',
    interfaces: ['Node'],
    fields: [
      {
        name: 'id',
        type: 'ID',
        nonNull: true,
        unique: true,
      },
      {
        name: 'text',
        type: 'String',
      },
      {
        name: 'sender',
        type: 'User',
        reverseName: 'messages',
      },
      {
        name: 'date',
        type: 'DateTime',
        orderable: true,
        filterable: true
      },
      {
        name: 'channel',
        type: 'Channel',
        reverseName: 'messages',
      },
    ],
    permissions: [
      {
        grantee: 'USER',
        userPath: ['sender'],
        create: true,
        read: true,
        update: true,
      },
      {
        grantee: 'USER',
        userPath: ['channel', 'members'],
        read: true,
      },
    ],
  },
]