import Ember from "ember";
                        import CSVRegexValidation from "./CSVRegexValidation";
                        
                        /**
                         * Validate duplication in a CSV. Pass type = 3 to get this.
                         *
                         * @class EmberColumnData.CSVDuplicateValidation
                         * @extends EmberColumnData.CSVRegexValidation
                         * @module ember-column-data
                         * @submodule ember-column-data-validation
                         */
                        export default CSVRegexValidation.extend({
                          validateValue : function(value/*, record*/) {
                            var invalid = false, negate = this.get("negate"),
                                isEmpty, valuesMap = {};
                            if(value && value.trim) {
                              value = value.trim();
                            }
                            isEmpty = Ember.isEmpty(value);
                            if(!isEmpty) {
                              value.split(this.get("delimeter")).some(function(item) { 
                                item = item.trim();
                                if(valuesMap[item]) {
                                  invalid = true;
                                }
                                else {
                                  valuesMap[item] = 1;
                                }
                                return negate ? !invalid : invalid; 
                              }, this); 
                              invalid = (negate && !invalid) || (!negate && invalid);
                            }
                            return [invalid, this.get("invalidMessage")];
                          },
                        });