javascript: Promise Chaining WIP

gistfile1.txt

// For an introduction to the Page Control template, see the following documentation:
// http://go.microsoft.com/fwlink/?LinkId=232511
(function () {
    "use strict";

    WinJS.UI.Pages.define("/pages/browse/byHub/byHub.html", {

        ready: function (element, options) {
            // TODO: Initialize the page here.
            var that = this;
            this._layoutRoot = element;
            this._options = options;

            this.enterPage = this.enterPage.bind(this);
            this.exitPage = this.exitPage.bind(this);

            //Set to true when hunting
            var bugHunt = function(message) {
                if (!bugHunt.entries) bugHunt.entries = [];
                var t = new Date();
                bugHunt.entries.push(t.getHours() + ":" + t.getMinutes() + "." + t.getSeconds() + " == " + message);
                if (bugHunt.enabled)
                    console.log(message);
            };

            //this._layoutRoot.querySelector('#header-title').innerText = "Browse Set";

            this._debug = bugHunt;

            this._pageData = [];
            
            //No parameter
            if (!options || !options.parent) {

                //TODO: Remove this redundant data call once the 'real' user collections exist 
                this._featuredProducts= [];
                this._pagePromises.push(Rainfall.Services.Products.getProducts(undefined, true).then(function(results) {
                    this._featuredProducts = results;
                }.bind(this)));

                //Default value for header
                WinJS.Binding.processAll(this._layoutRoot, {title: "Retailers"});
                // No parameter -> Get all retailers default categories

                this._pagePromises.push(Rainfall.Services.Retailers.getRetailer().then(function (retailers) {
                    bugHunt("Retailers " + retailers.length);
                    retailers.forEach(function(retailer) {
                        //Get the default categories
                        that._pagePromises.push(Rainfall.Services.Categories.getCategory(retailer.defaultCategories.join())
                            .then(function(defaultCategories) {
                                bugHunt("\t" + retailer.title + " tiles " + defaultCategories.length);
                                retailer.tiles = defaultCategories;
                                that._pageData.push(retailer);
                        }));
                    });
                }));
            } else {

                var parameter = options.parent;

                WinJS.Binding.processAll(this._layoutRoot, options.parent);

                if (parameter instanceof Rainfall.Models.RetailerDataModel) {
                    //Load the retailers default categories
                    this._pagePromises.push(Rainfall.Services.Categories.getCategory(parameter.defaultCategories.join())
                        .then(function (categories) {
                            categories.forEach(function(category) {
                                that._pagePromises.push(Rainfall.Services.Categories.getCategory(category.children.join())
                                    .then(function(childCategories) {
                                        category.tiles = childCategories;
                                        that._pageData.push(category);
                                    })//then
                                ); //push
                            });//foreach
                        })//then
                    );//push
                } else if (parameter instanceof Rainfall.Models.CategoryDataModel) {
                    this._pagePromises.push(Rainfall.Services.Categories.getCategory(parameter.children.join()).then(function(categories) {
                        categories.forEach(function(category) {

                            if (category.children && category.children.length > 0) {
                                //Get the child categories
                                that._pagePromises.push(Rainfall.Services.Categories.getCategory(category.children.join()).then(function(childCategories) {
                                    category.tiles = childCategories;
                                    that._pageData.push(category);
                                }));
                            } else if (category.products && category.products.length > 0) {
                                //Get the child products
                                that._pagePromises.push(Rainfall.Services.Products.getProducts(category.products.join()).then(function(childproducts) {
                                    category.tiles = childproducts;
                                    that._pageData.push(category);
                                }));
                            }
                        });
                    }));
                }
            }



        },
    });
})();