Composite Pattern

composite_pattern.js

// How To Use
// var categories = CategoryModule.Category.all();
// var categoryComposite = new CategoryModule.CategoryComposite('CategoryComposite', categories.categorias, null);
//
// var categoryComposities = categoryComposite.findByName('Bar');
//
// var originalCategories = categoryComposities.map(function(item) {
//   return item.original;
// });

CategoryModule = (function(){
  var Category = {
    all: function(){
      var responseText = $.ajax({
        type: "GET",
        url: CONSOLE_HOST + '/widget_api/categorias',
        async: false
      }).responseText;

      return JSON.parse(responseText);
    }
  };

  var ArrayHelper = {
    thereIsArray: function (array){
      for(index = 0; index < array.length; index++){
        if($.isArray(array[index])){
          return true;
        }
      }

      return false
    },

    flatRecursiveArray: function(array){
      while(this.thereIsArray(array)) {
        array = [].concat.apply([], array);
      }

      return array;
    }
  };

  var CategoryComposite = function(name, categories, original, parent){
    var buildComposities = function(categories, parent) {
      var container = [];

      categories.forEach(function(category){
        categoryComposite = new CategoryComposite(category.nome, category.categorias, category, parent);
        container.push(categoryComposite);
      });

      return container;
    };

    var isEmpty = function(array) {
      return array.length === 0
    };

    // Object Initialization
    this.name = name;
    this.categories = buildComposities(categories, this);
    this.original = original;
    this.parent = parent;

    // Public Methods
    this.findByName = function(name) {
      if(isEmpty(this.categories) && this.name !== name) {
        return []
      }

      var container = [];

      if(this.name === name) {
        container = [this];
      }

      this.categories.forEach(function(category) {
        container.push(category.findByName(name));
      });

      return ArrayHelper.flatRecursiveArray(container);
    };
  };

  return {
    Category: Category,
    CategoryComposite: CategoryComposite
  };
})();