Solution

README.md

@@ -15,4 +15,4 @@ You have 3 button that should load [the goods](https://mate-academy.github.io/re
 - Implement a solution following the [React task guideline](https://github.com/mate-academy/react_task-guideline#react-tasks-guideline).
 - Use the [React TypeScript cheat sheet](https://mate-academy.github.io/fe-program/js/extra/react-typescript).
 - Open one more terminal and run tests with `npm test` to ensure your solution is correct.
-- Replace `<your_account>` with your Github username in the [DEMO LINK](https://<your_account>.github.io/react_dynamic-list-of-goods/) and add it to the PR description.
+- Replace `<your_account>` with your Github username in the [DEMO LINK](https://olena-ole.github.io/react_dynamic-list-of-goods/) and add it to the PR description.

src/App.tsx

@@ -1,27 +1,55 @@
-import React from 'react';
+import React, { useState } from 'react';
 import './App.scss';
 import { GoodsList } from './GoodsList';
+import { getAll, get5First, getRedGoods } from './api/goods';
+import { Good } from './types/Good';
 
-// import { getAll, get5First, getRed } from './api/goods';
-// or
-// import * as goodsAPI from './api/goods';
+export const App: React.FC = () => {
+  const [currentGoods, setCurrentGoods] = useState<Good[]>([]);
+  const [errorMessage, setErrorMessage] = useState('');
 
-export const App: React.FC = () => (
-  <div className="App">
-    <h1>Dynamic list of Goods</h1>
+  const handleClick = (fetchFromServer: () => Promise<Good[]>) => {
+    setErrorMessage('');
+    fetchFromServer()
+      .then(goods => {
+        setCurrentGoods(goods);
+      })
+      .catch(() => {
+        setErrorMessage('Something went wrong... Try again later!');
+      });
+  };
 
-    <button type="button" data-cy="all-button">
-      Load all goods
-    </button>
+  return (
+    <div className="App">
+      <h1>Dynamic list of Goods</h1>
 
-    <button type="button" data-cy="first-five-button">
-      Load 5 first goods
-    </button>
+      <button
+        type="button"
+        data-cy="all-button"
+        onClick={() => handleClick(getAll)}
+      >
+        Load all goods
+      </button>
 
-    <button type="button" data-cy="red-button">
-      Load red goods
-    </button>
+      <button
+        type="button"
+        data-cy="first-five-button"
+        onClick={() => handleClick(get5First)}
+      >
+        Load 5 first goods
+      </button>
 
-    <GoodsList goods={[]} />
-  </div>
-);
+      <button
+        type="button"
+        data-cy="red-button"
+        onClick={() => handleClick(getRedGoods)}
+      >
+        Load red goods
+      </button>
+
+      {errorMessage
+        ? <p>{errorMessage}</p>
+        : <GoodsList goods={currentGoods} />}
+    </div>
+  );
+};

src/GoodsList.tsx

@@ -1,16 +1,21 @@
 import React from 'react';
 import { Good } from './types/Good';
+import { arePropsEqual } from './utils';
 
 type Props = {
   goods: Good[]
 };
 
-export const GoodsList: React.FC<Props> = ({ goods }) => (
+export const GoodsList: React.FC<Props> = React.memo(({ goods }) => (
   <ul>
     {goods.map(good => (
-      <li key={good.id} data-cy="good">
+      <li
+        key={good.id}
+        data-cy="good"
+        style={{ color: good.color }}
+      >
         {good.name}
       </li>
     ))}
   </ul>
-);
+), arePropsEqual);

src/api/goods.ts

@@ -5,15 +5,27 @@ const API_URL = `https://mate-academy.github.io/react_dynamic-list-of-goods/good
 
 export function getAll(): Promise<Good[]> {
   return fetch(API_URL)
-    .then(response => response.json());
+    .then(response => {
+      if (!response.ok) {
+        throw new Error();
+      }
+
+      return response.json();
+    });
 }
 
-export const get5First = () => {
+export const get5First = (): Promise<Good[]> => {
   return getAll()
-    .then(goods => goods); // sort and get the first 5
+    .then(goods => {
+      const sortedGoods = goods.sort(
+        (good1, good2) => good1.name.localeCompare(good2.name),
+      );
+
+      return sortedGoods.slice(0, 5);
+    });
 };
 
-export const getRedGoods = () => {
+export const getRedGoods = (): Promise<Good[]> => {
   return getAll()
-    .then(goods => goods); // get only red
+    .then(goods => goods.filter(good => good.color === 'red'));
 };

src/utils.ts

@@ -0,0 +1,17 @@
+import { Good } from './types/Good';
+
+type Props = {
+  goods: Good[],
+};
+
+type Callback = (goods1: Props, good2: Props) => boolean;
+
+export const arePropsEqual: Callback = (prevProps, nextProps) => {
+  if (prevProps.goods.length !== nextProps.goods.length) {
+    return false;
+  }
+
+  return prevProps.goods.every(
+    (good, index) => good.id === nextProps.goods[index].id,
+  );
+};