Implementare interfata utilizator

Prerequisites: All past steps

Acum ca avem un endpoint configurat, il putem conecta la o interfata pentru utilizatorii de pe internet.

1. Setups:

• In folderul /js adaugam folderul /components, pe acelasi nivel cu folderul /utils

• In folderul /components cream fisierele MainPage.jsx si InsertPage.jsx si initializam un function component pt fiecare

// js/components/MainPage.jsx
export default function MainPage() {
	return (
		<div></div>
	)
}

// js/components/InsertPage.jsx
export default function InsertPage() {
	return (
		<div></div>
	)
}

• In folderul /pages, vom modifica index.js si vom adauga componenta insert.jsx. In ele vom importa componentele definite mai sus pentru a fi desenate in pagina pe rutele /, respectiv /insert din aplicatia noastra web

// pages/index.js
import MainPage from "@/js/components/MainPage";

export default function Home() {
  return (
      <MainPage/>
  )
}

// pages/insert.js
import InsertPage from "@/js/components/InsertPage";

export default function Insert() {
  return (
      <InsertPage/>
  )
}

• In fisierul tailwind.config.js mai adaugam o linie ('./js/components/**/*.{js,ts,jsx,tsx}') in content

// tailwind.config.js
/** @type {import('tailwindcss').Config} */
module.exports = {
  content: [
    './pages/**/*.{js,ts,jsx,tsx,mdx}',
    './components/**/*.{js,ts,jsx,tsx,mdx}',
    './app/**/*.{js,ts,jsx,tsx,mdx}',
    './js/components/**/*.{js,ts,jsx,tsx}'
  ],
  .........
}

2. Pagina principala

Ca exemplu, vom construi o aplicatie care afiseaza curiozitati pe pagina principala (index). Curiozitatile sunt stocate in baza de date din cloud. Pe pagina /insert, utilizatorii pot introduce curiozitati in baza de date prin intermediul unui formular.

Pentru a adauga functionalitati si a stiliza pagina principala, accesam componenta MainPage - MainPage.jsx

• Pentru ca lista de curiozitati va fi adusa asincron din baza de date, definim un state gol in function component

• Accesam API-ul creat anterior si aducem curiozitatile atunci cand un utilizator acceseaza pagina

// js/components/MainPage.jsx
import {useEffect, useState} from "react";

export default function MainPage() {
	const [records, setRecords] = useState([]);
	
	useEffect(() => {
		try{
			fetch('/api/records', {
				method: 'GET',
			})
				.then(response => response.json())
				.then(json => setRecords(json.data));
		}
		catch (error) {
			console.log(error);
		}
	}, []);

	return (
		<div></div>
	)
}

• Adaugam componente vizuale stilizate cu tailwind si afisam fiecare curiozitate folosind functia map.

• Adaugam si un buton prin care sa stergem o inregistrare din baza de date la click + functionalitatea aferenta

// js/components/MainPage.jsx
import {useEffect, useState} from "react";

export default function MainPage() {
	.......

	const deleteRecord = (event) => {
		event.preventDefault();
		const id = event.target.id;
		try {
			fetch(`/api/records?id=${id}`, {
				method: 'DELETE',
			})
				.then(response => response.json())
				.then(json => {
						setRecords(records.filter(record => record._id !== id));
				});
		}
		catch (error) {
			console.log(error);
		}
	}

	return (
		<section className="bg-white dark:bg-gray-900">
			<div className="container px-6 py-10 mx-auto">
				<h1 className="w-[500px] mx-auto text-center text-6xl">Fun facts app</h1>
				<p className="w-[1000px] mx-auto text-center mt-4 text-3xl">This is an app that showcases fun facts</p>

				<div className="grid grid-cols-1 gap-8 mt-8 xl:mt-12 xl:gap-12 sm:grid-cols-2 xl:grid-cols-4 lg:grid-cols-3">
					{records.map(record => (
						<div
							key={record._id}
							className="block max-w-sm p-6 bg-white border border-gray-200 rounded-lg shadow hover:bg-gray-100 dark:bg-gray-800 dark:border-gray-700 dark:hover:bg-gray-700">
							<h5 className="mb-2 text-2xl font-bold tracking-tight text-gray-900 dark:text-white">
								{record.title}
							</h5>
							<p className="font-normal text-gray-700 dark:text-gray-400">
								{record.description}
							</p>
							<div className={"flex justify-center mt-4"}>
								<button type="button"
								        id={record._id}
								        onClick={deleteRecord}
								        className="focus:outline-none text-white bg-red-700 hover:bg-red-800 focus:ring-4 focus:ring-red-300 font-medium rounded-lg text-sm px-5 py-2.5 mr-2 mb-2 dark:bg-red-600 dark:hover:bg-red-700 dark:focus:ring-red-900">Delete
								</button>
							</div>
						</div>
					))}
				</div>
			</div>
		</section>
	)
}

• La final, componenta are urmatorul cod:

// js/components/MainPage.jsx
import {useEffect, useState} from "react";

export default function MainPage() {
	const [records, setRecords] = useState([]);

	useEffect(() => {
		try{
			fetch('/api/records', {
				method: 'GET',
			})
				.then(response => response.json())
				.then(json => setRecords(json.data));
		}
		catch (error) {
			console.log(error);
		}
	}, []);

	const deleteRecord = (event) => {
		event.preventDefault();
		const id = event.target.id;
		try {
			fetch(`/api/records?id=${id}`, {
				method: 'DELETE',
			})
				.then(response => response.json())
				.then(json => {
						setRecords(records.filter(record => record._id !== id));
				});
		}
		catch (error) {
			console.log(error);
		}
	}

	return (
		<section className="bg-white dark:bg-gray-900">
			<div className="container px-6 py-10 mx-auto">
				<h1 className="w-[500px] mx-auto text-center text-6xl">Fun facts app</h1>
				<p className="w-[1000px] mx-auto text-center mt-4 text-3xl">This is an app that showcases fun facts</p>

				<div className="grid grid-cols-1 gap-8 mt-8 xl:mt-12 xl:gap-12 sm:grid-cols-2 xl:grid-cols-4 lg:grid-cols-3">
					{records.map(record => (
						<div
							key={record._id}
							className="block max-w-sm p-6 bg-white border border-gray-200 rounded-lg shadow hover:bg-gray-100 dark:bg-gray-800 dark:border-gray-700 dark:hover:bg-gray-700">
							<h5 className="mb-2 text-2xl font-bold tracking-tight text-gray-900 dark:text-white">
								{record.title}
							</h5>
							<p className="font-normal text-gray-700 dark:text-gray-400">
								{record.description}
							</p>
							<div className={"flex justify-center mt-4"}>
								<button type="button"
								        id={record._id}
								        onClick={deleteRecord}
								        className="focus:outline-none text-white bg-red-700 hover:bg-red-800 focus:ring-4 focus:ring-red-300 font-medium rounded-lg text-sm px-5 py-2.5 mr-2 mb-2 dark:bg-red-600 dark:hover:bg-red-700 dark:focus:ring-red-900">Delete
								</button>
							</div>
						</div>
					))}
				</div>
			</div>
		</section>
	)
}

• Aplicatia arata acum astfel (dupa ce am introdus manual cateva date in BD):

3. Pagina /insert

• In componenta InsertPage introducem un formular cu 2 campuri si un buton de submit

// js/components/InsertPage.jsx
export default function InsertPage() {
	return (
		<section className="bg-white dark:bg-gray-900">
			<div className="container px-6 py-10 mx-auto">
				<h1 className="w-[500px] mx-auto text-center text-6xl">Fun facts app</h1>
				<p className="w-[1000px] mx-auto text-center mt-4 text-3xl">This is an app that showcases fun facts</p>

				<form>
					<div className="mb-6">
						<label htmlFor="title" className="block mb-2 text-sm font-medium text-gray-900 dark:text-white">Fact title</label>
						<input type="text" id="title"
						       className="bg-gray-50 border border-gray-300 text-gray-900 text-sm rounded-lg focus:ring-blue-500 focus:border-blue-500 block w-full p-2.5 dark:bg-gray-700 dark:border-gray-600 dark:placeholder-gray-400 dark:text-white dark:focus:ring-blue-500 dark:focus:border-blue-500"
						       placeholder="[e-mail]" required/>
					</div>
					<div className="mb-6">
						<label htmlFor="description"
						       className="block mb-2 text-sm font-medium text-gray-900 dark:text-white">Fact description</label>
						<textarea id="description"
						       className="bg-gray-50 border border-gray-300 text-gray-900 text-sm rounded-lg focus:ring-blue-500 focus:border-blue-500 block w-full p-2.5 dark:bg-gray-700 dark:border-gray-600 dark:placeholder-gray-400 dark:text-white dark:focus:ring-blue-500 dark:focus:border-blue-500"
						       required/>
					</div>
					<button type="submit"
					        onClick={ insertRecord }
					        className="text-white bg-blue-700 hover:bg-blue-800 focus:ring-4 focus:outline-none focus:ring-blue-300 font-medium rounded-lg text-sm w-full sm:w-auto px-5 py-2.5 text-center dark:bg-blue-600 dark:hover:bg-blue-700 dark:focus:ring-blue-800">Submit
					</button>
				</form>
			</div>
		</section>
	)
}

• Introducem logica de introducere a datelor la click pe butonul submit

• La final, componenta InsertPage contine urmatorul cod:

// js/components/InsertPage.jsx
export default function InsertPage() {
	const insertRecord = (event) => {
		event.preventDefault();
		const title = document.getElementById("title").value;
		const description = document.getElementById("description").value;
		const data = {title, description};
		fetch("/api/records", {
			method: "POST",
			headers: {
				"Content-Type": "application/json",
			},
			body: JSON.stringify(data),
		}).then(() => {
			console.log("New record inserted");
			document.getElementById("title").value = "";
			document.getElementById("description").value = "";
		});
	}

	return (
		<section className="bg-white dark:bg-gray-900">
			<div className="container px-6 py-10 mx-auto">
				<h1 className="w-[500px] mx-auto text-center text-6xl">Fun facts app</h1>
				<p className="w-[1000px] mx-auto text-center mt-4 text-3xl">This is an app that showcases fun facts</p>

				<form>
					<div className="mb-6">
						<label htmlFor="title" className="block mb-2 text-sm font-medium text-gray-900 dark:text-white">Fact title</label>
						<input type="text" id="title"
						       className="bg-gray-50 border border-gray-300 text-gray-900 text-sm rounded-lg focus:ring-blue-500 focus:border-blue-500 block w-full p-2.5 dark:bg-gray-700 dark:border-gray-600 dark:placeholder-gray-400 dark:text-white dark:focus:ring-blue-500 dark:focus:border-blue-500"
						       placeholder="[e-mail]" required/>
					</div>
					<div className="mb-6">
						<label htmlFor="description"
						       className="block mb-2 text-sm font-medium text-gray-900 dark:text-white">Fact description</label>
						<textarea id="description"
						       className="bg-gray-50 border border-gray-300 text-gray-900 text-sm rounded-lg focus:ring-blue-500 focus:border-blue-500 block w-full p-2.5 dark:bg-gray-700 dark:border-gray-600 dark:placeholder-gray-400 dark:text-white dark:focus:ring-blue-500 dark:focus:border-blue-500"
						       required/>
					</div>
					<button type="submit"
					        onClick={ insertRecord }
					        className="text-white bg-blue-700 hover:bg-blue-800 focus:ring-4 focus:outline-none focus:ring-blue-300 font-medium rounded-lg text-sm w-full sm:w-auto px-5 py-2.5 text-center dark:bg-blue-600 dark:hover:bg-blue-700 dark:focus:ring-blue-800">Submit
					</button>
				</form>
			</div>
		</section>
	)
}

• Pagina /insert arata acum astfel:

• Trimitem totul in repository-ul remote git.

Acum ca avem o aplicatie functionala, o putem lansa pe internet folosing un serviciu in cloud!