Rewrote the shopping cart to use my own funky JS thing and it works.

features/fakepay/api.go

@@ -0,0 +1,13 @@
+package features_fakepay
+
+import (
+  "github.com/gofiber/fiber/v2"
+)
+
+func PostApiPay(c *fiber.Ctx) error {
+  return c.Redirect("/fakepay/complete")
+}
+
+func SetupApi(app *fiber.App) {
+  app.Post("/api/fakepay/pay", PostApiPay)
+}

features/fakepay/db.go

@@ -0,0 +1,9 @@
+package features_fakepay
+
+import (
+//   "MY/webapp/data"
+//   _ "github.com/mattn/go-sqlite3"
+//   sq "github.com/Masterminds/squirrel"
+)
+
+

features/fakepay/init.go

@@ -0,0 +1,10 @@
+package features_fakepay
+
+import (
+  "github.com/gofiber/fiber/v2"
+)
+
+func Setup(app *fiber.App) {
+  SetupApi(app)
+  SetupViews(app)
+}

features/fakepay/views.go

@@ -0,0 +1,11 @@
+package features_fakepay
+
+import (
+  "github.com/gofiber/fiber/v2"
+  . "MY/webapp/common"
+)
+
+func SetupViews(app *fiber.App) {
+  err := ConfigViews(app, "views/fakepay")
+  if err != nil { panic(err) }
+}

features/init.go

@@ -5,10 +5,12 @@ import (
   "MY/webapp/features/email"
   "MY/webapp/features/paypal"
   "MY/webapp/features/shopping"
+  "MY/webapp/features/fakepay"
 )
 
 func Setup(app *fiber.App) {
   features_email.Setup(app)
   features_paypal.Setup(app)
   features_shopping.Setup(app)
+  features_fakepay.Setup(app)
 }

features/shopping/api.go

@@ -16,13 +16,16 @@ func GetApiProducts(c *fiber.Ctx) error {
   return data.SelectJson[data.Product](c, err, sql, args...)
 }
 
-
 func GetApiCart(c *fiber.Ctx) error {
-
   return c.JSON(fiber.Map{})
 }
 
+func GetApiCartRemove(c *fiber.Ctx) error {
+  return c.Redirect("/shopping/checkout")
+}
+
 func SetupApi(app *fiber.App) {
   app.Get("/api/shopping/products", GetApiProducts)
   app.Get("/api/shopping/cart", GetApiCart)
+  app.Get("/api/shopping/cart/remove/:item_id", GetApiCartRemove)
 }

static/input_style.css

@@ -237,6 +237,14 @@ hr {
   visibility: hidden;
 }
 
+form {
+  @apply flex flex-col;
+}
+
+form > button-group {
+  @apply flex text-gray-50 p-3 justify-stretch *:flex-1 gap-2;
+}
+
 select {
   @apply text-red-50 bg-gray-800 rounded-lg border-1 border-gray-600 p-1;
 }

static/js/code.js

@@ -8,6 +8,7 @@ class PaginateTable {
   }
 
   async contents() {
+    console.log("CONTENTS RUN");
     if(this.page < 0) this.page = 0;
 
     let url = `${this.url}?page=${this.page}`;
@@ -45,6 +46,8 @@ class ForeverScroll {
 
     const items = await resp.json();
     if(items) this.items = items;
+
+    return items;
   }
 
   async load() {

static/js/jzed.js

@@ -0,0 +1,233 @@
+const $boot = (cb) => {
+  document.addEventListener("DOMContentLoaded", cb);
+}
+
+const $sanitize = (badHTML) => {
+  // this Option hack courtesy of stackoverflow
+  return new Option(badHTML).innerHTML;
+}
+
+const validate_sanitized = (sanitized) => {
+  const check = JSON.stringify(sanitized);
+  console.assert(!check.includes("<"),
+    "YOU BEEN HACKED! Send Zed this:", sanitized);
+}
+
+const $sanitize_data = (data) => {
+  const sanitized = $sanitize(JSON.stringify(data));
+  validate_sanitized(sanitized);
+  return JSON.parse(sanitized);
+}
+
+const $render = (template, data) => {
+  const sanitized = $sanitize_data(data);
+
+  const args = Object.keys(sanitized);
+  const values = Object.values(sanitized)
+
+  const render_func = new Function(...args,
+    `return \`${template.innerHTML}\``)
+
+  const text = render_func(...values);
+
+  return $html(text);
+}
+
+const $render_data = (template_id, target_id, data) => {
+  const target = $id(target_id);
+  const template = $id(template_id);
+  let new_data = [];
+
+  if(Array.isArray(data)) {
+    new_data = data.map((item, i) => {
+      return $render(template, {i, item});
+    });
+  } else if(data instanceof Object) {
+    console.log("object rendering", data);
+    new_data.push($render(template, data));
+  } else {
+    console.error("$render only works with {} or [] data", data);
+    new_data.push($html("<b>ERROR LOOK IN CONSOLE</b>"));
+  }
+
+  $replace_with(target, new_data);
+}
+
+const $get = (name, inChildren) => {
+  if(inChildren) {
+    return inChildren.querySelector(name);
+  } else {
+    return document.querySelector(name);
+  }
+}
+
+const $all = (name, inChildren) => {
+  if(inChildren) {
+    return inChildren.querySelectorAll(name);
+  } else {
+    return document.querySelectorAll(name);
+  }
+}
+
+const $id = (name, inChildren) => {
+  if(inChildren) {
+    return inChildren.children.namedItem(name);
+  } else {
+    return document.getElementById(name);
+  }
+}
+
+const $class = (name) => {
+  return document.getElementsByClassName(name);
+}
+
+const $name = (name) => {
+  return document.getElementsByTagName(name);
+}
+
+const $filter = (nodes, fn) => {
+  return Array.prototype.filter.call(nodes, fn);
+}
+
+const $next = (node) => {
+  return node.nextElementSibling;
+}
+
+const $previous = (node) => {
+  return node.previousElementSibling;
+}
+
+const $siblings = (node) => {
+  return $filter(node.parentNode.children, 
+    child => { return child !== node; });
+}
+
+const $style_toggle = (node, className) => {
+  node.classList.toggle(className);
+}
+
+const $style_add = (node, className) => {
+  node.classList.add(className);
+}
+
+const $style_del = (node, className) => {
+  node.classList.remove(className);
+}
+
+const $style_of = (node, ruleName) => {
+  return getComputedStyle(node)[ruleName]
+}
+
+const $new = (tag, id, html) => {
+  let new_tag = document.createElement(tag);
+  new_tag.id = id;
+  new_tag.innerHTML = html;
+  return new_tag.cloneNode(true);
+}
+
+const $append = (parent, child) => {
+  parent.appendChild(child);
+}
+
+const $prepend = (parent, node) => {
+  parent.insertBefore(node, parent.firstChild);
+}
+
+const $remove = (parent, child) => {
+  parent.removeChild(child);
+}
+
+const $clone = (node) => {
+  return node.cloneNode(true);
+}
+
+const $contains = (node, child) => {
+  return node !== child && node.contains(child);
+}
+
+const $has = (node, selector) => {
+  return node.querySelector(selector) !== null;
+}
+
+const $empty = (node) => {
+  return node.innerHTML == '';
+}
+
+const $attribute_of = (node, name) => {
+  return node.getAttribute(name);
+}
+
+const $attribute = (node, name, value) => {
+  return node.setAttribute(name, value);
+}
+
+const $contents_of = (node) => {
+  return node.innerHTML;
+}
+
+const $contents = (node, newhtml) => {
+  node.innerHTML = newhtml;
+}
+
+const $has_class = (node, className) => {
+  return node.classList.contains(className);
+}
+
+const $outer_html = (node) => {
+  return node.outerHTML;
+}
+
+const $replace_with = (node, newNodes) => {
+  node.replaceChildren(...newNodes);
+}
+
+const $matches = (node, selector) => {
+  return node.matches(selector);
+}
+
+const $parent = (node) => {
+  return node.parentNode;
+}
+
+const $text_of = (node) => {
+  return node.textContent;
+}
+
+const $text = (node, newtext) => {
+  node.textContent = newtext;
+}
+
+const $off = (node, eventName,  eventHandler) => {
+  node.removeEventListener(eventName, eventHandler);
+}
+
+const $on = (node, eventName, eventHandler) => {
+  node.addEventListener(eventName, eventHandler);
+}
+
+const $now = () => {
+  return Date.now();
+}
+
+const $html = (htmlString) => {
+  const temp = document.createElement('template');
+  temp.innerHTML = htmlString;
+  return temp.content;
+}
+
+const $observe = (node_id, cb) => {
+  const options = {
+    root: document,
+    rootMargin: "0px",
+    scrollMargin: "0px",
+    threshold: 1.0,
+    delay: 200,
+  };
+
+  const callback = (entries, observer) => {
+    cb();
+  }
+
+  const observer = new IntersectionObserver(callback, options);
+  observer.observe($id(node_id));
+}

tests/fakepay/example_test.go

@@ -0,0 +1,14 @@
+package tests
+
+import (
+  "testing"
+  "github.com/stretchr/testify/require"
+)
+
+func TestLogin(t *testing.T) {
+  assert.Equal(true, false)
+}
+
+func TestMain(m *testing.M) {
+  m.Run()
+}

views/fakepay/complete.html

@@ -0,0 +1,6 @@
+<h1>Thank You!</h1>
+
+<p>Your payment has been accepted and you should receive an email with your receipt.<p>
+
+<p><a href="/login/">Log In To Your Account</a></p>
+

views/fakepay/index.html

@@ -0,0 +1,29 @@
+
+<card>
+  <top>
+    <h1>FakePay</h1>
+  </top>
+  <middle>
+    <form action="/api/fakepay/pay" method="POST">
+      <label for="Card">Card</label>
+      <input name="Card" id="Card" placeholder="Card" />
+
+      <label for="NameOnCard">Name on Card</label>
+      <input name="NameOnCard" id="NameOnCard" placeholder="Name on Card" />
+
+      <label for="CVV">CVV</label>
+      <input name="CVV" id="CVV" placeholder="CVV" />
+
+      <label for="Expiration">Expiration</label>
+      <input name="Expiration" id="Expiration" placeholder="Expiration" />
+
+      <label for="PostalCode">Postal/Zip</label>
+      <input name="PostalCode" id="PostalCode" placeholder="PostalCode" />
+
+      <button-group>
+        <a href="/shopping/"><button type="button">Continue Shopping</button></a>
+        <button type="submit">Submit</button>
+      </button-group>
+    </form>
+  </middle>
+</card>

views/layouts/main.html

@@ -13,6 +13,7 @@
     <!-- then alpine runs, triggers init, and tada you get no-build plugins -->
     <script defer src="/js/alpine.js"></script>
     <script src="/js/code.js"></script>
+    <script src="/js/jzed.js"></script>
     <title>Go Web Dev Starter Kit</title>
   </head>
   <body id="top" data-testid="{{.PageId}}">

views/shopping/checkout.html

@@ -5,7 +5,7 @@
 
   <bar class="justify-between" style="padding:30px">
     <div class="text-2xl">Price: $100.00</div>
-    <a href="/shopping/remove/1"><button type="button">X</button></a>
+    <a href="/api/shopping/cart/remove/1"><button type="button">X</button></a>
   </bar>
 </bar>
 
@@ -16,6 +16,5 @@
 
 <bar>
   <a href="/shopping/"><button type="button">Continue Shopping</button></a>
-  <a href="/paypal/"><button type="button">Pay with Paypal</button></a>
-  <a href="/paypal/"><button type="button">Pay with Credit Card</button></a>
+  <a href="/fakepay/"><button type="button">Pay with FakePay</button></a>
 </bar>

views/shopping/index.html

@@ -1,24 +1,104 @@
 <script>
-  let Data = new PaginateTable("/api/shopping/products")
+  /*
+   * Advantages of => over function:
+   * - Easier transition from variables to callbacks.
+   * - this variable is locked so isn't random
+   * - can't accidentally rename the function because it's const
+   * - callbacks with function are fucking stupid.
+   */
+  let Data = new ForeverScroll("/api/shopping/products");
+
+  const cartItems = [];
+
+  const update = () => {
+    // product list
+    // cart contents
+    const cart = $id('cart');
+    let total = cartItems.reduce((a, v) => a + v.Price, 0.0);
+
+    if(cartItems.length > 0) {
+      $style_del(cart, 'hidden');
+      $render_data('cart-row', 'cart-items', cartItems);
+    } else {
+      $style_add(cart, 'hidden');
+    }
+
+    $text($id('cart-total'), `${total}`);
+  }
+
+  const remove = (item_number) => {
+    cartItems.splice(item_number, 1);
+    update();
+  }
+
+  const addToCart = (item_i) => {
+    cartItems.push(Data.items[item_i]);
+    update();
+  }
+
+  $boot(async () => {
+    // kind of not good so revisit how Data works
+    const items = await Data.init();
+    const list = $id('product-list');
+    const tmpl = $id('product-row');
+
+    for(let i in items) {
+      $append(list, $render(tmpl, {i, item: items[i]}));
+    }
+  });
+
 </script>
 
+<style>
+.hidden {
+  visibility: hidden;
+}
+</style>
+
 <h1>Products</h1>
 
-<p>I have these products for you:</p>
-
-<block x-data="Data">
-<template x-for="item in contents">
-  <bar class="bg-gray-800">
-    <shape x-text="item.Slug"></shape>
-    <div>
-      <h4 x-text="item.Title"></h4>
-      <aside x-text="item.Description"></aside>
-
-      <bar class="justify-between" style="padding:30px">
-        <div class="text-2xl">Price: <span x-text="item.Price"></span></div>
-        <a href="/shopping/checkout"><button type="button">Buy</button></a>
-      </bar>
-    </div>
-  </bar>
-</template>
+<div id="cart" class="hidden">
+  <aside>
+    <table id='cart-items'>
+    </table>
+
+    <template id="cart-row">
+      <tr id='item-${i}'>
+        <td>${item.Title}</td>
+        <td>${item.Price}</td>
+        <td>
+          <button type="button" onclick='remove(${i})'>X</button>
+        </td>
+      </tr>
+    </template>
+
+    <p>Cart total is <span id='cart-total'></span></p>
+    <a href="/shopping/checkout">
+      <button type="button">Checkout</button>
+    </a>
+  </aside>
+</div>
+
+<block id='product-list'>
+  <template id='product-row'>
+    <bar class="bg-gray-800">
+      <shape></shape>
+      <div>
+        <h4>${item.Title}</h4>
+        <aside>${item.Description}</aside>
+
+        <bar class="justify-between" style="padding:30px">
+        <div class="text-2xl">Price: <span>${item.Price}</span></div>
+          <button onclick="addToCart(${i})" id="cart-button" type="button">
+            <span>
+              Add to Cart
+            </span>
+          </button>
+        </bar>
+      </div>
+    </bar>
+  </template>
 </block>
+
+<div id='canary'></div>
+