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AddClassMapping.coffee

ModelUtils = require('../../shared/modelUtils')

module.exports = class AddClassMapping
  constructor: (@utils)->
    @utils ||= new ModelUtils

  add: (key, modelConstructor)=>
    @utils._classMap[@utils.underscorize(key)] = modelConstructor;

ModelUtils.coffee

BaseModel = require("./base/model")
BaseCollection = require("./base/collection")

module.exports = class ModelUtils

  constructor: (@entryPath)->
    @_classMap = {}

  getModel: (path, attrs, options) ->
    attrs = attrs or {}
    options = options or {}
    Model = @getModelConstructor(path)
    new Model(attrs, options)

  getCollection: (path, models, options) ->
    models = models or []
    options = options or {}
    Collection = @getCollectionConstructor(path)
    new Collection(models, options)

  getModelConstructor: (path) ->
    path = ModelUtils.underscorize(path)
    @_classMap[path] or require(@entryPath + "app/models/" + path)

  getCollectionConstructor: (path) ->
    path = ModelUtils.underscorize(path)
    @_classMap[path] or require(@entryPath + "app/collections/" + path)

  isModel: (obj) ->
    obj instanceof BaseModel

  isCollection: (obj) ->
    obj instanceof BaseCollection

  getModelNameForCollectionName: (collectionName) ->
    Collection = @getCollectionConstructor(collectionName)
    @modelName Collection::model

  @uppercaseRe: /([A-Z])/g
  @underscorize: (name) ->
    return `undefined`  unless name?
    name = name.replace(@uppercaseRe, (c) ->
      "_" + c.toLowerCase()
    )
    name = name.slice(1)  if name[0] is "_"
    name
  underscorize: (name)->
    ModelUtils.underscorize(name)


  ###
  The 'name' property is added to the constructor when using a named function,
  and it cannot be changed.  I.e.:

  function MyClass(){}
  MyClass.name
  -> "MyClass"

  We first look for the 'id' property of the constructor, which is compatible
  with standard Backbone-style class inheritance.

  var MyClass = Backbone.Model.extend({});
  MyClass.name
  -> ""
  MyClass.id = "MyClass"
  ###
  modelName: (modelOrCollectionClass) ->
    ModelUtils.underscorize modelOrCollectionClass.id or modelOrCollectionClass.name

  modelIdAttribute: (modelName) ->
    constructor = undefined
    constructor = @getModelConstructor(modelName)
    constructor::idAttribute