Message.json

{
  _id: uint, //gives us format :101123 for replies, etc
  owner_id: int,
  text: String,
  room: int, // id of room
  starred: [user_id], // ids of users
  flagged: [user_id], // ids of users
  timestamp: timestamp, // all timestamps are in unix from UTC
  deleted: timestamp, // null indicates not deleted
  deletedBy: user_id, // indicates who deleted the message
  history: [ { user : user_id, text : String, edited : timestamp } ]
}

MessageUpdatedFlagged.json

{
  message_id: int,
  flagged: [user_id], // ids of users
}

MessageUpdatedStarred.json

{
  message_id: int,
  starred: [user_id], // ids of users
}

Room.json

{
  _id: uint,
  owners: [user_id], // ids
  name: String,
  description: String,
  created: timestamp,
  created_by: user_id,
  last_message: message_id, // we can link back all the info we need from this or denormalize later
  total_messages: uint,
  total_messages_24hours: uint,
  total_users_ever: uint,
  total_users_now: uint,
  histogram: [int], // ask me about this later .. I want histograms just like SO has on everything
  state: int, //locked_deleted/deleted/frozen/active
  type: int, //public/gallery/private
  explicit_write_access: [user_id], // don't need to be exposed to the user _per-se_
  explicit_read_access: [user_id], // don't need to be exposed to the user _per-se_
}

SystemMessage.json

{
  submitter: user_id,
  text: String,
  expiry: timestamp, //may be falsy, requires a user to clear it if so
}

User.json

{
  _id: int, //users can be negative. Negative users indicates a system account
  name: String,
  email: String,
  password_hash: String,
  website: String,
  introduction: String,
  gravatar_hash: String,
  histogram: [int],
  rooms_currently_in: [room_id],
  last_seen: timestamp,
  last_sent_message: message_id,
  last_spoke_here: timestamp, // this is only for use on the client, has no need on the server, per-se
  total_messages_sent: uint, // can be decremented on deletes
  total_flags_ever: uint,
  banned: timestamp, // may be null or falsy, indicates no ban active
  banned_duration: long, // to be added to the timestamp?
  ignored_users: [user_id], // to allow people to ignore others (do we need to support by room ignore?)
  role: int, // admin / moderator / user / guest? / trial-admin?
  can_talk: bool,
  can_read: bool,
}