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144
scripts/groceries.js
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144
scripts/groceries.js
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// Array of products, each product is an object with different fieldset
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// A set of ingredients should be added to products
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var products = [
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{
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name: "broccoli",
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vegetarian: true,
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glutenFree: true,
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organic: true,
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price: 1.99,
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productImg: "images/broccoli.png"
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},
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{
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name: "bread",
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vegetarian: true,
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glutenFree: false,
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organic: false,
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price: 2.35,
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productImg: "images/bread.png"
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},
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{
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name: "salmon",
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vegetarian: false,
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glutenFree: true,
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organic: false,
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price: 10.00,
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productImg: "images/salmon.png"
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},
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{
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name: "carrot",
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vegetarian: true,
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glutenFree: true,
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organic: true,
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price: 2.63,
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productImg: "images/carrot.png"
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},
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{
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name: "chicken",
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vegetarian: false,
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glutenFree: true,
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organic: false,
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price: 6.87,
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productImg: "images/chicken.png"
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},
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{
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name: "cereal",
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vegetarian: false,
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glutenFree: false,
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organic: false,
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price: 2.97,
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productImg: "images/cereal.png"
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},
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{
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name: "cheese",
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vegetarian: false,
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glutenFree: false,
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organic: false,
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price: 5.14,
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productImg: "images/cheese.png"
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},
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{
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name: "white fish",
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vegetarian: false,
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glutenFree: true,
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organic: false,
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price: 13.50,
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productImg: "images/white-fish.png"
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},
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{
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name: "honey",
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vegetarian: false,
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glutenFree: false,
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organic: true,
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price: 1.89,
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productImg: "images/honey.png"
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},
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{
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name: "onion",
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vegetarian: true,
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glutenFree: true,
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organic: true,
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price: 2.22,
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productImg: "images/onion.png"
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}
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];
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products.sort(function(a, b) {
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return a.price - b.price;
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})
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function getProductImg(productName) {
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var prodVal = products.find(prod => prod.name === productName);
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return prodVal.productImg;
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}
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// given restrictions provided, make a reduced list of products
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// prices should be included in this list, as well as a sort based on price
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function restrictListProducts(prods, restriction) {
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let product_names = [];
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for (let i=0; i<prods.length; i+=1) {
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if ((restriction == "Vegetarian") && (prods[i].vegetarian == true)){
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product_names.push(prods[i].name);
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}
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else if ((restriction == "GlutenFree") && (prods[i].glutenFree == true)){
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product_names.push(prods[i].name);
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}
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else if ((restriction == "VegetarianANDGluten-Free") && (prods[i].glutenFree == true) && (prods[i].vegetarian == true)){
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product_names.push(prods[i].name);
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}
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else if ((restriction == "Organic") && (prods[i].organic == true)){
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product_names.push(prods[i].name);
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}
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else if ((restriction == "Non-Organic") && (prods[i].organic == false)){
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product_names.push(prods[i].name);
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}
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else if ( restriction == "None") {
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product_names.push(prods[i].name);
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}
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}
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return product_names;
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}
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// Calculate the total price of items, with received parameter being a list of products
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function getTotalPrice(chosenProducts) {
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var totalPrice = 0;
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for (let i=0; i<products.length; i+=1) {
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if (chosenProducts.indexOf(products[i].name) > -1){
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totalPrice += products[i].price;
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}
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}
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return totalPrice;
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}
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function getItemPrice(chosenProduct){
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for (let i=0; i<products.length; i+=1) {
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if (chosenProduct.indexOf(products[i].name) > -1){
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return products[i].price;
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}
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}
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}
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124
scripts/main.js
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124
scripts/main.js
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// This function is called when any of the tab is clicked
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// It is adapted from https://www.w3schools.com/howto/howto_js_tabs.asp
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function openInfo(evt, tabName) {
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// Get all elements with class="tabcontent" and hide them
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tabcontent = document.getElementsByClassName("tabcontent");
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for (i = 0; i < tabcontent.length; i++) {
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tabcontent[i].style.display = "none";
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}
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// Get all elements with class="tablinks" and remove the class "active"
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tablinks = document.getElementsByClassName("tablinks");
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for (i = 0; i < tablinks.length; i++) {
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tablinks[i].className = tablinks[i].className.replace(" active", "");
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}
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// Show the current tab, and add an "active" class to the button that opened the tab
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document.getElementById(tabName).style.display = "block";
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evt.currentTarget.className += " active";
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}
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// generate a checkbox list from a list of products
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// it makes each product name as the label for the checkbos
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function populateListProductChoices(slct1, slct2) {
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var s1 = document.getElementById(slct1);
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var s2 = document.getElementById(slct2);
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// s2 represents the <div> in the Products tab, which shows the product list, so we first set it empty
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s2.innerHTML = "";
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// obtain a reduced list of products based on restrictions
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var optionArray = restrictListProducts(products, s1.value);
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// for each item in the array, create a checkbox element, each containing information such as:
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// <input type="checkbox" name="product" value="Bread">
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// <label for="Bread">Bread/label><br>
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for (i = 0; i < optionArray.length; i++) {
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var productName = optionArray[i];
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// create the checkbox and add in HTML DOM
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var checkbox = document.createElement("input");
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checkbox.type = "checkbox";
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checkbox.name = "product";
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checkbox.value = productName;
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s2.appendChild(checkbox);
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// create a label for the checkbox, and also add in HTML DOM
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var label = document.createElement('label')
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label.htmlFor = productName;
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var itemPrice = getItemPrice(productName);
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label.appendChild(document.createTextNode(productName + " $" + itemPrice));
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// //get price of an item
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// var itemPrice = getItemPrice(productName);
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// label.appendChild(document.createTextNode(" $" + itemPrice));
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s2.appendChild(label);
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// create a breakline node and add in HTML DOM
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s2.appendChild(document.createElement("br"));
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//create <img src="">
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var prodImg = document.createElement("img");
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prodImg.src = getProductImg(productName);
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// prodImg = document.getElementById("displayProduct");
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// console.log("trial", prodImg.src);
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s2.appendChild(prodImg);
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//use this to space the images
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s2.appendChild(document.createElement("br"));
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s2.appendChild(document.createElement("br"));
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}
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}
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// This function is called when the "Add selected items to cart" button in clicked
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// The purpose is to build the HTML to be displayed (a Paragraph)
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// We build a paragraph to contain the list of selected items, and the total price
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function selectedItems(){
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var ele = document.getElementsByName("product");
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var chosenProducts = [];
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var c = document.getElementById('displayCart');
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c.innerHTML = "";
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// build list of selected item
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var para = document.createElement("P");
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para.innerHTML = "You selected : ";
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para.appendChild(document.createElement("br"));
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for (i = 0; i < ele.length; i++) {
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if (ele[i].checked) {
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para.appendChild(document.createTextNode(ele[i].value + " $" + getItemPrice(ele[i].value)));
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para.appendChild(document.createElement("br"));
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//adding the image
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console.log(getProductImg(ele[i].value));
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var cartImg = para.appendChild(document.createElement("img"));
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cartImg.src = getProductImg(ele[i].value);
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// para.appendChild(cartImg);
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para.appendChild(document.createElement("br"));
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chosenProducts.push(ele[i].value);
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}
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}
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// add paragraph and total price
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c.appendChild(para);
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c.appendChild(document.createTextNode("Total Price is $" + getTotalPrice(chosenProducts)));
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}
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