progress update: functioning Read functionality

.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Typescript v1 declaration files
+typings/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+
+# next.js build output
+.next
+
+# deta-space internal files
+.space

app.js

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+const createError = require("http-errors");
+const express = require("express");
+const path = require("path");
+const cookieParser = require("cookie-parser");
+const logger = require("morgan");
+const mongoose = require("mongoose");
+require("dotenv").config();
+
+const app = express();
+
+// get db
+const mongoDB = `mongodb+srv://${process.env.USER}:${process.env.PASS}@odin.eftl02o.mongodb.net/?retryWrites=true&w=majority`;
+// or throw error
+main().catch((err) => console.log(err));
+async function main() {
+  await mongoose.connect(mongoDB);
+}
+
+// bootstrap
+app.use(
+  "/styles/css",
+  express.static(path.join(__dirname, "node_modules/bootstrap/dist/css"))
+);
+
+// view engine setup
+app.set("views", path.join(__dirname, "views"));
+app.set("view engine", "ejs");
+
+app.use(logger("dev"));
+app.use(express.json());
+app.use(express.urlencoded({ extended: false }));
+app.use(cookieParser());
+app.use(express.static(path.join(__dirname, "public")));
+
+const router = require("./routes/index");
+
+app.use("/", router);
+
+// catch 404 and forward to error handler
+app.use(function (req, res, next) {
+  next(createError(404));
+});
+
+// error handler
+app.use(function (err, req, res, next) {
+  // render the error page
+  res.status(err.status || 500);
+  res.render("error");
+});
+
+module.exports = app;

bin/www

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+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var app = require('../app');
+var debug = require('debug')('express-inventory-application:server');
+var http = require('http');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+var port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+var server = http.createServer(app);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val) {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening() {
+  var addr = server.address();
+  var bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}

controllers/category.js

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+const Category = require("../models/category.js");
+const Item = require("../models/item.js");
+const asyncHandler = require("express-async-handler");
+
+exports.index = asyncHandler(async (req, res, next) => {
+  // get array of relevant variables for displaying category and its items
+  // get current category from URL
+  const category = await Category.findOne({
+    simpleName: req.params.category,
+  })
+    .lean()
+    .exec();
+  // check
+  if (category === null) {
+    const error = new Error("Category not found");
+    return next(error);
+  }
+  // get all items from category
+  const items = await Item.find({ category: category._id }).lean().exec();
+  // render with all relevant vars
+  res.render("category", {
+    category: category,
+    items: items,
+  });
+});
+
+exports.category_create_get = asyncHandler(async (req, res, next) => {
+  res.send("ligma");
+});
+
+exports.category_create_post = asyncHandler(async (req, res, next) => {
+  res.send("ligma");
+});
+
+exports.category_delete_get = asyncHandler(async (req, res, next) => {
+  res.send("ligma");
+});
+
+exports.category_delete_post = asyncHandler(async (req, res, next) => {
+  res.send("ligma");
+});
+
+exports.category_update_get = asyncHandler(async (req, res, next) => {
+  res.send("ligma");
+});
+
+exports.category_update_post = asyncHandler(async (req, res, next) => {
+  res.send("ligma");
+});

controllers/index.js

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+const Category = require("../models/category.js");
+const Item = require("../models/item.js");
+const asyncHandler = require("express-async-handler");
+
+exports.index = asyncHandler(async (req, res, next) => {
+  // gets categories from database
+  const rawCats = await Category.find().lean().exec();
+
+  // function to get items for specified category from database
+  const getItems = async (category) => {
+    return await Item.find({ category: category._id }).lean().exec();
+  };
+
+  // creats a copy of the raw categories array with each category's items included as .items (copying is easier than overwriting)
+  const categories = [];
+  for (let rawCat of rawCats) {
+    rawCat.items = await getItems(rawCat);
+    categories.push(rawCat);
+  }
+
+  res.render("index", {
+    categories: categories,
+  });
+});

controllers/item.js

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+const Category = require("../models/category.js");
+const Item = require("../models/item.js");
+const asyncHandler = require("express-async-handler");
+
+exports.index = asyncHandler(async (req, res, next) => {
+  // get current item from URL
+  const item = await Item.findOne({
+    _id: req.params.item,
+  })
+    .lean()
+    .exec();
+  // get current category from item
+  const category = await Category.findById(item.category).lean().exec();
+  // check
+  if (item === null) {
+    const error = new Error("Item not found");
+    return next(error);
+  }
+  // render with all relevant vars
+  res.render("item", {
+    item: item,
+    category: category,
+  });
+});
+
+exports.item_detail = asyncHandler(async (req, res, next) => {
+  res.send("ligma");
+});
+
+exports.item_create_get = asyncHandler(async (req, res, next) => {
+  res.send("ligma");
+});
+
+exports.item_create_post = asyncHandler(async (req, res, next) => {
+  res.send("ligma");
+});
+
+exports.item_delete_get = asyncHandler(async (req, res, next) => {
+  res.send("ligma");
+});
+
+exports.item_delete_post = asyncHandler(async (req, res, next) => {
+  res.send("ligma");
+});
+
+exports.item_update_get = asyncHandler(async (req, res, next) => {
+  res.send("ligma");
+});
+
+exports.item_update_post = asyncHandler(async (req, res, next) => {
+  res.send("ligma");
+});

models/category.js

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+const mongoose = require("mongoose");
+
+const Schema = mongoose.Schema;
+
+const CategorySchema = new Schema({
+  name: { type: String, required: true },
+  simpleName: { type: String, required: true },
+  description: { type: String, required: true },
+});
+
+// Virtual for author's URL
+CategorySchema.virtual("url").get(function () {
+  // We don't use an arrow function as we'll need the this object
+  return `/${this.simpleName}`;
+});
+
+// Export model
+module.exports = mongoose.model("Category", CategorySchema);

models/item.js

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+const { ObjectId } = require("mongoose");
+const mongoose = require("mongoose");
+
+const Schema = mongoose.Schema;
+
+const ItemSchema = new Schema({
+  name: { type: String, required: true },
+  category: { type: ObjectId, required: true },
+  description: { type: String, required: true },
+  price: { type: Number, required: true },
+  quantity: { type: Number, required: true },
+});
+
+// Virtual for author's URL
+ItemSchema.virtual("url").get(function () {
+  // We don't use an arrow function as we'll need the this object
+  return `/${this.category.simpleName}/${this._id}}`;
+});
+
+// Export model
+module.exports = mongoose.model("Item", ItemSchema);

package.json

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+{
+  "name": "express-inventory-application",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node ./bin/www"
+  },
+  "dependencies": {
+    "bootstrap": "^5.3.1",
+    "cookie-parser": "~1.4.4",
+    "debug": "~2.6.9",
+    "dotenv": "^16.3.1",
+    "ejs": "^3.1.9",
+    "express": "^4.18.2",
+    "express-async-handler": "^1.2.0",
+    "http-errors": "~1.6.3",
+    "morgan": "~1.9.1"
+  },
+  "devDependencies": {
+    "mongoose": "^7.5.0"
+  }
+}

populatedb.js

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+#! /usr/bin/env node
+
+console.log(
+  'This script populates some test books, authors, genres and bookinstances to your database. Specified database as argument - e.g.: node populatedb "mongodb+srv://cooluser:coolpassword@cluster0.lz91hw2.mongodb.net/local_library?retryWrites=true&w=majority"'
+);
+
+// Get arguments passed on command line
+const userArgs = process.argv.slice(2);
+
+const Item = require("./models/item");
+const Category = require("./models/category");
+
+const items = [];
+const categories = [];
+
+const mongoose = require("mongoose");
+
+const mongoDB = userArgs[0];
+
+main().catch((err) => console.log(err));
+
+async function main() {
+  console.log("Debug: About to connect");
+  await mongoose.connect(mongoDB);
+  console.log("Debug: Should be connected?");
+  await createCategories();
+  await createItems();
+  console.log("Debug: Closing mongoose");
+  mongoose.connection.close();
+}
+
+async function categoryCreate(index, name, simpleName, description) {
+  const category = new Category({
+    name: name,
+    simpleName: simpleName,
+    description: description,
+  });
+  await category.save();
+  categories[index] = category;
+  console.log(`Added category: ${name}`);
+}
+
+async function itemCreate(index, name, category, description, price, quantity) {
+  const item = new Item({
+    name: name,
+    category: category,
+    description: description,
+    price: price,
+    quantity: quantity,
+  });
+  await item.save();
+  items[index] = item;
+  console.log(`Added item: ${name}`);
+}
+
+async function createCategories() {
+  console.log("Adding categories");
+  await Promise.all([
+    categoryCreate(
+      0,
+      "Feed and Seed",
+      "feedandseed",
+      "Well well well, look at the city slicker pulling up in his fancy German car!"
+    ),
+    categoryCreate(
+      1,
+      "Food",
+      "food",
+      "Frozen or fresh, we've got what you need!"
+    ),
+    categoryCreate(
+      2,
+      "Household Goods",
+      "householdgoods",
+      "Basics and essentials for your home"
+    ),
+    categoryCreate(
+      3,
+      "Personal Care",
+      "personalcare",
+      "Cleanliness is next to Godliness"
+    ),
+  ]);
+}
+
+async function createItems() {
+  console.log("Adding items");
+  await Promise.all([
+    itemCreate(
+      0,
+      "Corn Seed",
+      categories[0]._id,
+      "25lb. bag of corn seed",
+      19.99,
+      20
+    ),
+    itemCreate(
+      1,
+      "Wheat Seed",
+      categories[0]._id,
+      "25lb. bag of wheat seed",
+      19.99,
+      20
+    ),
+    itemCreate(
+      2,
+      "Seed Potatoes",
+      categories[0]._id,
+      "25lb. bag of seed potatoes",
+      14.99,
+      20
+    ),
+    itemCreate(
+      3,
+      "Duck Feed",
+      categories[0]._id,
+      "25lb. bag of duck feed",
+      19.99,
+      20
+    ),
+    itemCreate(
+      4,
+      "Chicken Feed",
+      categories[0]._id,
+      "25lb. bag of chicken feed",
+      19.99,
+      20
+    ),
+    itemCreate(
+      5,
+      "Barn Pellets",
+      categories[0]._id,
+      "25lb. bag of dehydrated pine pellets",
+      19.99,
+      20
+    ),
+    itemCreate(
+      6,
+      "Tuna Salad Sandwich",
+      categories[1]._id,
+      "Freshly-prepared tuna salad sandwich",
+      4.99,
+      15
+    ),
+    itemCreate(
+      7,
+      "Egg Salad Sandwich",
+      categories[1]._id,
+      "Freshly-prepared egg salad sandwich",
+      4.99,
+      15
+    ),
+    itemCreate(
+      8,
+      "Cola (2L.)",
+      categories[1]._id,
+      "2 liter bottle of cola",
+      1.99,
+      25
+    ),
+    itemCreate(
+      9,
+      "Cola (12-pack)",
+      categories[1]._id,
+      "12 pack of cola",
+      3.99,
+      25
+    ),
+    itemCreate(
+      10,
+      "Espresso Coffee Grounds",
+      categories[1]._id,
+      "Medium-strength espresso coffee grounds (10 oz.)",
+      3.99,
+      20
+    ),
+    itemCreate(
+      11,
+      "Sliced American Cheese",
+      categories[1]._id,
+      "1 pack of sliced American cheese (24 slices per pack)",
+      3.99,
+      50
+    ),
+    itemCreate(
+      12,
+      "Lasagna",
+      categories[1]._id,
+      "Frozen lasagna (1 lb.)",
+      9.99,
+      25
+    ),
+    itemCreate(
+      13,
+      "Burritos",
+      categories[1]._id,
+      "Frozen burritos (12x)",
+      9.99,
+      25
+    ),
+    itemCreate(
+      14,
+      "Sliders",
+      categories[1]._id,
+      "Frozen sliders (12x)",
+      9.99,
+      25
+    ),
+    itemCreate(15, "Tuna", categories[1]._id, "One can of tuna", 0.99, 25),
+    itemCreate(
+      16,
+      "Crinkle-Cut Fries",
+      categories[1]._id,
+      "Frozen crinkle-cut fries (80 oz.)",
+      7.99,
+      25
+    ),
+    itemCreate(
+      17,
+      "Supreme(R) Pizza",
+      categories[1]._id,
+      `18" frozen pizza with rising crust, officially Supreme(R) branded`,
+      7.99,
+      25
+    ),
+    itemCreate(
+      18,
+      "Soap Bar",
+      categories[3]._id,
+      `1 soap bar (unsecented)`,
+      0.99,
+      25
+    ),
+    itemCreate(
+      19,
+      "Body Wash",
+      categories[3]._id,
+      `Liquid body wash (18 fl. oz.)`,
+      9.99,
+      15
+    ),
+    itemCreate(
+      20,
+      "Sponge",
+      categories[2]._id,
+      "Sponge with scrub strip",
+      0.99,
+      100
+    ),
+    itemCreate(
+      21,
+      "Hair Conditioner",
+      categories[3]._id,
+      `Revitalizing and moisturizing hair conditioner (18 fl. oz.)`,
+      9.99,
+      15
+    ),
+    itemCreate(
+      22,
+      "Shampoo",
+      categories[3]._id,
+      `Anti-dandruff shampoo (18 fl. oz.)`,
+      9.99,
+      15
+    ),
+    itemCreate(
+      23,
+      "Toothpaste",
+      categories[3]._id,
+      `Anticavity fluoride toothpaste (60g)`,
+      2.99,
+      50
+    ),
+    itemCreate(
+      24,
+      "Deodorant Stick",
+      categories[3]._id,
+      `Deodorant/antiperspirant stick (3oz)`,
+      3.99,
+      20
+    ),
+    itemCreate(
+      25,
+      "Hand Soap",
+      categories[2]._id,
+      "Liquid hand soap (12 oz.)",
+      2.99,
+      25
+    ),
+    itemCreate(
+      26,
+      "Toilet Paper",
+      categories[2]._id,
+      "Triple-ply toilet paper roll (6x)",
+      5.99,
+      25
+    ),
+    itemCreate(
+      27,
+      "Paper towel",
+      categories[2]._id,
+      "Triple-ply paper towel roll (6x)",
+      5.99,
+      25
+    ),
+  ]);
+}

routes/index.js

@@ -0,0 +1,31 @@
+const express = require("express");
+const router = express.Router();
+
+const category_controller = require("../controllers/category.js");
+const index_controller = require("../controllers/index.js");
+const item_controller = require("../controllers/item.js");
+
+// home page
+router.get("/", index_controller.index);
+
+// create category page
+router.get("/createcategory", category_controller.category_create_get);
+router.post("/createcategory", category_controller.category_create_post);
+
+// category functions
+router.get("/:category", category_controller.index);
+router.get("/:category/update", category_controller.category_update_get);
+router.post("/:category/update", category_controller.category_update_post);
+router.get("/:category/delete", category_controller.category_delete_get);
+router.post("/:category/delete", category_controller.category_delete_post);
+
+// item functions
+router.get("/:category/:item", item_controller.index);
+router.get("/:category/createitem", item_controller.item_create_get);
+router.post("/:category/createitem", item_controller.item_create_post);
+router.get("/:category/:item/update", item_controller.item_update_get);
+router.post("/:category/:item/update", item_controller.item_update_post);
+router.get("/:category/:item/delete", item_controller.item_delete_get);
+router.post("/:category/:item/delete", item_controller.item_delete_post);
+
+module.exports = router;

views/category.ejs

@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Good Pickin's - <%= category.name %></title>
+    <link rel="stylesheet" href="/styles/css/bootstrap.min.css" />
+  </head>
+  <body class="bg-dark text-light">
+    <div class="d-flex flex-column py-4 px-4 align-items-center">
+      <h1 class="mb-0"><%= category.name %></h1>
+      <p class="mb-0"><%= category.description %></p>
+      <div class="pb-4"></div>
+      <% items.forEach(item => { %>
+      <a
+        href="/<%= category.simpleName %>/<%= item._id %>"
+        type="button"
+        class="btn btn-outline-light px-4"
+      >
+        <%= item.name %> (<%= item.quantity %>)
+      </a>
+      <div class="pb-4"></div>
+      <% }) %>
+      <div class="pb-4"></div>
+    </div>
+    <footer
+      class="position-fixed bottom-0 border-light border-top w-100 py-2 d-flex justify-content-center bg-dark"
+    >
+      <a href="/" type="button" class="btn btn-outline-light px-4 py-1">
+        Back to Home
+      </a>
+    </footer>
+  </body>
+</html>

views/error.ejs

@@ -0,0 +1,3 @@
+<h1><%= message = 'Error!' %></h1>
+<h2><%= error.status %></h2>
+<pre><%= error.stack %></pre>

views/index.ejs

@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Good Pickin's</title>
+    <link rel="stylesheet" href="/styles/css/bootstrap.min.css" />
+  </head>
+  <body class="bg-dark text-light min-vh-100">
+    <div class="d-flex flex-column py-4 px-4 align-items-center">
+      <h1 class="mb-0">Welcome to Good Pickin's General Store!</h1>
+      <p class="mb-0">(formerly Chuck's)</p>
+      <p>est. 2023</p>
+      <div class="pb-4"></div>
+      <% categories.forEach(category => {%>
+      <a
+        href="/<%= category.simpleName %>"
+        type="button"
+        class="btn btn-outline-light px-4"
+      >
+        <%= category.name %> (<%= category.items.length %>)
+      </a>
+      <div class="pb-4"></div>
+      <% }) %>
+      <a
+        href="/createcategory"
+        type="button"
+        class="btn btn-outline-light px-4"
+      >
+        +
+      </a>
+    </div>
+  </body>
+</html>

views/item.ejs

@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Good Pickin's - <%= item.name %></title>
+    <link rel="stylesheet" href="/styles/css/bootstrap.min.css" />
+  </head>
+  <body class="bg-dark text-light">
+    <div class="d-flex flex-column py-4 px-4 align-items-center">
+      <h1 class="mb-0"><%= item.name %></h1>
+      <p><%= item.description %></p>
+      <p class="mb-0"><%= item.quantity %> available at $<%= item.price %></p>
+      <div class="pb-4"></div>
+      <a
+        href="/<%= category.simpleName %>/<%= item._id %>/update"
+        type="button"
+        class="btn btn-outline-light px-4"
+      >
+        Edit this item
+      </a>
+      <div class="pb-4"></div>
+      <a
+        href="/<%= category.simpleName %>/<%= item._id %>/delete"
+        type="button"
+        class="btn btn-outline-light px-4"
+      >
+        Delete this item
+      </a>
+    </div>
+    <footer
+      class="position-fixed bottom-0 border-light border-top w-100 py-2 d-flex justify-content-center"
+    >
+      <a href="/" type="button" class="btn btn-outline-light px-4 py-1">
+        Back to Home
+      </a>
+    </footer>
+  </body>
+</html>