message.coffee

db = require "../lib/db"
Q = require "q"
_ = require "lodash"

GROUP = "messages"

getNewId = (cb) ->
  db.getNewIdFor(GROUP, cb)
  
class Message
  constructor: (obj) ->
    # Sometimes the incoming obj can be missing an id
    obj.id = obj.id || null
    
    # Assign all properties of the object to this.
    _.extend(this, obj)

  save: (cb) ->
    if @id is null
      @getNewId(@saveToDb.bind(@, cb))
    else
      @saveToDb(cb)
    
  saveToDb: (cb) -> db.save GROUP, @id, @, cb 

  # This does't operate on an instance, it just returns
  # a message object from the database.
  get: (id, cb) ->
    db.get GROUP, id, (err, obj) ->
      cb err, new Message(obj)


module.exports = Message