pesto-students · y471n · Mar 31, 2020 · Mar 31, 2020 · Mar 31, 2020 · Mar 31, 2020
diff --git a/react-exercises/grocery-list-react/README.md b/react-exercises/grocery-list-react/README.md
@@ -0,0 +1,21 @@
+# Instructions
+
+In this exercises, you'll will make a reactive grocery list.
+
+## How to do the question
+- Run `npm install` in the `grocery-list-react` folder.
+- Run `npm run start` to start the development server.
+
+## Requirements
+- Users should see a grocery list items a couple of button to control the behavior of the list. 
+- User should be able to add more grocery items through an input box and click a `Add` button to add it to the list displaying the item.
+- There should be a button to clear all the grocery list items at once.
+- If there is an item already, and the same item is added again, show `2` now beside that grocery item. This number is going to increase everytime the same item is added to the grocery list. 
+- Clicking on a grocery item should change its color to red. Clicking again should change
+          it back to black. Red means the item has been purchased.
+- You can add any other control as you prefer. 
+- **The UI is totally up to you. Make it as beautiful as you can by using any CSS that you can write. No libraries allowed of any kind.**
+- Make sure to make your as readable, maintainable as possible.
+
+## Restrictions
+- You are not allowed to use any extra library at all for `CSS` or any other thing. 
diff --git a/react-exercises/grocery-list-react/package.json b/react-exercises/grocery-list-react/package.json
@@ -0,0 +1,34 @@
+{
+  "name": "grocery-list",
+  "version": "0.1.0",
+  "private": true,
+  "dependencies": {
+    "@testing-library/jest-dom": "^4.2.4",
+    "@testing-library/react": "^9.3.2",
+    "@testing-library/user-event": "^7.1.2",
+    "react": "^16.13.1",
+    "react-dom": "^16.13.1",
+    "react-scripts": "3.4.1"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test",
+    "eject": "react-scripts eject"
+  },
+  "eslintConfig": {
+    "extends": "react-app"
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  }
+}
diff --git a/react-exercises/grocery-list-react/public/favicon.ico b/react-exercises/grocery-list-react/public/favicon.ico
diff --git a/react-exercises/grocery-list-react/public/index.html b/react-exercises/grocery-list-react/public/index.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="theme-color" content="#000000" />
+    <meta
+      name="description"
+      content="Web site created using create-react-app"
+    />
+    <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
+    <!--
+      manifest.json provides metadata used when your web app is installed on a
+      user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
+    -->
+    <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
+    <!--
+      Notice the use of %PUBLIC_URL% in the tags above.
+      It will be replaced with the URL of the `public` folder during the build.
+      Only files inside the `public` folder can be referenced from the HTML.
+
+      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
+      work correctly both with client-side routing and a non-root public URL.
+      Learn how to configure a non-root public URL by running `npm run build`.
+    -->
+    <title>React App</title>
+  </head>
+  <body>
+    <noscript>You need to enable JavaScript to run this app.</noscript>
+    <div id="root"></div>
+    <!--
+      This HTML file is a template.
+      If you open it directly in the browser, you will see an empty page.
+
+      You can add webfonts, meta tags, or analytics to this file.
+      The build step will place the bundled scripts into the <body> tag.
+
+      To begin the development, run `npm start` or `yarn start`.
+      To create a production bundle, use `npm run build` or `yarn build`.
+    -->
+  </body>
+</html>
diff --git a/react-exercises/grocery-list-react/public/logo192.png b/react-exercises/grocery-list-react/public/logo192.png
diff --git a/react-exercises/grocery-list-react/public/logo512.png b/react-exercises/grocery-list-react/public/logo512.png
diff --git a/react-exercises/grocery-list-react/public/manifest.json b/react-exercises/grocery-list-react/public/manifest.json
@@ -0,0 +1,25 @@
+{
+  "short_name": "React App",
+  "name": "Create React App Sample",
+  "icons": [
+    {
+      "src": "favicon.ico",
+      "sizes": "64x64 32x32 24x24 16x16",
+      "type": "image/x-icon"
+    },
+    {
+      "src": "logo192.png",
+      "type": "image/png",
+      "sizes": "192x192"
+    },
+    {
+      "src": "logo512.png",
+      "type": "image/png",
+      "sizes": "512x512"
+    }
+  ],
+  "start_url": ".",
+  "display": "standalone",
+  "theme_color": "#000000",
+  "background_color": "#ffffff"
+}
diff --git a/react-exercises/grocery-list-react/public/robots.txt b/react-exercises/grocery-list-react/public/robots.txt
@@ -0,0 +1,3 @@
+# https://www.robotstxt.org/robotstxt.html
+User-agent: *
+Disallow:
diff --git a/react-exercises/grocery-list-react/src/App.css b/react-exercises/grocery-list-react/src/App.css
@@ -0,0 +1,38 @@
+.App {
+  text-align: center;
+}
+
+.App-logo {
+  height: 40vmin;
+  pointer-events: none;
+}
+
+@media (prefers-reduced-motion: no-preference) {
+  .App-logo {
+    animation: App-logo-spin infinite 20s linear;
+  }
+}
+
+.App-header {
+  background-color: #282c34;
+  min-height: 100vh;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  font-size: calc(10px + 2vmin);
+  color: white;
+}
+
+.App-link {
+  color: #61dafb;
+}
+
+@keyframes App-logo-spin {
+  from {
+    transform: rotate(0deg);
+  }
+  to {
+    transform: rotate(360deg);
+  }
+}
diff --git a/react-exercises/grocery-list-react/src/App.js b/react-exercises/grocery-list-react/src/App.js
@@ -0,0 +1,54 @@
+import React from 'react';
+import GroceryList from './components/GroceryList';
+
+function App() {
+  const [groceryItems, setGroceryItems] = React.useState([]);
+  const [inputBoxValue, setInputBoxValue] = React.useState('');
+
+  const groceryItemExists = newGroceryItem => {
+    return groceryItems.findIndex(groceryItem => groceryItem.name === newGroceryItem) > -1;
+  };
+
+  const addGroceryItem = e => {
+    e.preventDefault();
+    if (!inputBoxValue) return;
+    const newGroceryItem = inputBoxValue;
+    let newGroceryItems = [];
+    if (groceryItemExists(inputBoxValue)) {
+      const duplicateGroceryItemIndex = groceryItems.findIndex(
+        groceryItem => groceryItem.name === newGroceryItem
+      );
+      newGroceryItems = [...groceryItems];
+      newGroceryItems[duplicateGroceryItemIndex].quantity += 1;
+    } else {
+      newGroceryItems = [
+        ...groceryItems,
+        { name: inputBoxValue, clicked: 0, id: groceryItems.length, quantity: 1 }
+      ];
+    }
+    setGroceryItems(newGroceryItems);
+    setInputBoxValue('');
+  };
+
+  const handleGroceryItemClick = groceryItemId => {
+    const newGroceryItems = [...groceryItems];
+    newGroceryItems[groceryItemId].clicked += 1;
+    setGroceryItems(newGroceryItems);
+  };
+
+  return (
+    <div className="App">
+      <form onSubmit={addGroceryItem}>
+        <input
+          type="text"
+          value={inputBoxValue}
+          onChange={e => setInputBoxValue(e.target.value)}
+        ></input>
+        <button type="submit">Add</button>
+      </form>
+      <GroceryList items={groceryItems} handleClick={handleGroceryItemClick}></GroceryList>
+    </div>
+  );
+}
+
+export default App;
diff --git a/react-exercises/grocery-list-react/src/App.test.js b/react-exercises/grocery-list-react/src/App.test.js
@@ -0,0 +1,9 @@
+import React from 'react';
+import { render } from '@testing-library/react';
+import App from './App';
+
+test('renders learn react link', () => {
+  const { getByText } = render(<App />);
+  const linkElement = getByText(/learn react/i);
+  expect(linkElement).toBeInTheDocument();
+});
diff --git a/react-exercises/grocery-list-react/src/components/GroceryItem.jsx b/react-exercises/grocery-list-react/src/components/GroceryItem.jsx
@@ -0,0 +1,17 @@
+import React from 'react';
+
+const GroceryItem = ({ item, handleClick }) => {
+  const redText = {
+    color: 'red'
+  };
+  const blackText = {
+    color: 'black'
+  };
+  return (
+    <p onClick={() => handleClick(item.id)} style={item.clicked > 0 ? redText : blackText}>
+      {item.name} <span>{item.quantity}</span>
+    </p>
+  );
+};
+
+export default GroceryItem;
diff --git a/react-exercises/grocery-list-react/src/components/GroceryList.jsx b/react-exercises/grocery-list-react/src/components/GroceryList.jsx
@@ -0,0 +1,14 @@
+import React from 'react';
+import GroceryItem from './GroceryItem';
+
+const GroceryList = ({ items, handleClick }) => {
+  return (
+    <React.Fragment>
+      {items.map(item => (
+        <GroceryItem item={item} key={item.id} handleClick={handleClick}></GroceryItem>
+      ))}
+    </React.Fragment>
+  );
+};
+
+export default GroceryList;
diff --git a/react-exercises/grocery-list-react/src/index.css b/react-exercises/grocery-list-react/src/index.css
@@ -0,0 +1,13 @@
+body {
+  margin: 0;
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
+    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
+    sans-serif;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+code {
+  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
+    monospace;
+}
diff --git a/react-exercises/grocery-list-react/src/index.js b/react-exercises/grocery-list-react/src/index.js
@@ -0,0 +1,17 @@
+import React from 'react';
+import ReactDOM from 'react-dom';
+import './index.css';
+import App from './App';
+import * as serviceWorker from './serviceWorker';
+
+ReactDOM.render(
+  <React.StrictMode>
+    <App />
+  </React.StrictMode>,
+  document.getElementById('root')
+);
+
+// If you want your app to work offline and load faster, you can change
+// unregister() to register() below. Note this comes with some pitfalls.
+// Learn more about service workers: https://bit.ly/CRA-PWA
+serviceWorker.unregister();
diff --git a/react-exercises/grocery-list-react/src/logo.svg b/react-exercises/grocery-list-react/src/logo.svg