Angular filter to include items that belong to a given array by array element value or optionally by object property value.

inarray.coffee

'use strict'

###*
 # @ngdoc filter
 # @name app.filter:inArray
 # @description Angular filter to include items that belong to a given array 
 # by array element value or optionally by object property value.
 # # inArray
###
angular.module 'app'
  .filter 'inArray', ($filter) ->
    (input, arr, prop) ->
      
      # Exit if array is not valid or empty
      if angular.isUndefined(arr) || !angular.isArray(arr) || arr.length == 0
        return input
      
      # Check if should filter by object property
      if angular.isUndefined(prop)
        $filter('filter')(input, (item) -> arr.indexOf(item) == -1)
      else
        $filter('filter')(input, (item) -> arr.indexOf(item[prop]) == -1)