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New DB based GuestBook

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This commit is contained in:
Kilian Hofmann 2024-06-14 13:48:24 +02:00
parent 15d3507b04
commit 70da3e66fd
14 changed files with 403 additions and 2 deletions
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7
phpCourse.code-workspace
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@ -3,5 +3,10 @@
{
"path": "."
}
]
],
"settings": {
"cSpell.words": [
"benutzer"
]
}
}

2
tasks/functions/index.php
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@ -3,7 +3,7 @@
<head>
<?php include_once "../../base/meta.php" ?>
<title>Counter</title>
<title>Functions</title>
</head>
<body>

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tasks/functions2/index.php Normal file
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<!DOCTYPE html>
<html lang="en">
<head>
<?php include_once "../../base/meta.php" ?>
<title>Functions 2</title>
</head>
<body>
<?php
include_once "../../base/settings.php";
include_once "../../base/headers.php";
Headers::html();
include_once "../../base/database.php";
$db = DB::openConnection();
function getFirmenAnzahl($land, $db)
{
$query = "SELECT COUNT(*) AS Anzahl FROM Lieferanten WHERE Land = :LAND";
$stmt = $db->prepare($query);
$stmt->bindValue(":LAND", $land);
$stmt->execute();
return $stmt->fetch(PDO::FETCH_COLUMN);
}
function getArtikelname($artikelnr, $db)
{
$query = "SELECT Artikelname FROM Artikel WHERE ArtikelNr = :NR";
$stmt = $db->prepare($query);
$stmt->bindValue(":NR", $artikelnr);
$stmt->execute();
return $stmt->fetch(PDO::FETCH_COLUMN);
}
function getArtikelAnzahl($firma, $db)
{
$query = "SELECT COUNT(*) FROM Artikel AS A, Lieferanten AS L WHERE A.LieferantenNr = L.LieferantenNr AND L.Firma = :FIRMA";
$stmt = $db->prepare($query);
$stmt->bindValue(":FIRMA", $firma);
$stmt->execute();
return $stmt->fetch(PDO::FETCH_COLUMN);
}
function updPercArticle($firma, $perc, $db)
{
$query = "
UPDATE
Artikel AS A, Lieferanten AS L
SET
A.Einzelpreis = A.Einzelpreis * :PERC
WHERE
A.LieferantenNr = L.LieferantenNr AND
L.Firma = :FIRMA";
$stmt = $db->prepare($query);
$stmt->bindValue(":FIRMA", $firma);
$stmt->bindValue(":PERC", 1 + $perc / 100);
$stmt->execute();
}
$anz_de = getFirmenAnzahl("Deutschland", $db);
$anz_fr = getFirmenAnzahl("Frankreich", $db);
$name = getArtikelname(1, $db);
$anz_exotic = getArtikelAnzahl("Exotic Liquids", $db);
echo "<p>Es sind $anz_de Firmen in Deutschland ansässig.</p>";
echo "<p>Es sind $anz_fr Firmen in Frankreich ansässig.</p>";
echo "<p>$name hat Art.Nr. 1</p>";
echo "<p>Exotic Liquids liefert $anz_exotic Artikel</p>";
echo "<p>Before price hike</p>";
$query = "SELECT A.Einzelpreis FROM Artikel AS A, Lieferanten AS L WHERE A.LieferantenNr = L.LieferantenNr AND L.Firma = 'Tokyo Traders'";
$stmt = $db->prepare($query);
$stmt->execute();
echo "<pre>";
var_dump($stmt->fetchAll());
echo "</pre>";
updPercArticle("Tokyo Traders", 10, $db);
echo "<p>After price hike</p>";
$query = "SELECT A.Einzelpreis FROM Artikel AS A, Lieferanten AS L WHERE A.LieferantenNr = L.LieferantenNr AND L.Firma = 'Tokyo Traders'";
$stmt = $db->prepare($query);
$stmt->execute();
echo "<pre>";
var_dump($stmt->fetchAll());
echo "</pre>";
DB::closeConnection($db);
?>
</body>
</html>

45
tasks/guestBookDB/actions/comment.php Normal file
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<?php
include_once "../../../base/settings.php";
include_once "../../../base/headers.php";
session_start();
$_SESSION["error"] = [];
if (!isset($_POST["title"])) {
array_push($_SESSION["error"], "Title was not among the data sent.");
}
if (!isset($_POST["name"])) {
array_push($_SESSION["error"], "Name was not among the data sent.");
}
if (!isset($_POST["comment"])) {
array_push($_SESSION["error"], "Comment was not among the data sent.");
}
$title = trim($_POST["title"]);
$name = trim($_POST["name"]);
$comment = substr(trim($_POST["comment"]), 0, 250);
$time = time();
if ($title === "") {
array_push($_SESSION["error"], "The title was empty.");
}
if ($name === "") {
array_push($_SESSION["error"], "The name was empty.");
}
if ($comment === "") {
array_push($_SESSION["error"], "The comment was empty.");
}
if (count($_SESSION["error"]) > 0) {
Headers::redirect(".");
return;
}
$string = file_get_contents("../data/data.json") ?? "[]";
$json = json_decode($string);
array_push($json, ["time" => $time, "title" => $title, "name" => $name, "comment" => $comment]);
file_put_contents("../data/data.json", json_encode($json));
Headers::redirect("../");

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tasks/guestBookDB/components/.htaccess Normal file
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Order deny,allow
Deny from all
Allow from 127.0.0.1

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tasks/guestBookDB/components/comment.php Normal file
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<div class="col">
<div class="card h-100 shadow-sm">
<div class="card-header">
<h6 class="card-subtitle mb-2 text-muted"><?= htmlspecialchars($comment["name"]) ?></h6>
</div>
<div class="card-body">
<p class="card-text"><?= nl2br(htmlspecialchars($comment["comment"])) ?></p>
</div>
<div class="card-footer">
<small class="text-muted">
<?= $comment["time"] ?>
</small>
</div>
</div>
</div>

7
tasks/guestBookDB/components/error.php Normal file
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<div class="alert alert-danger alert-dismissible fade show mt-3 mb-0">
<svg class="bi flex-shrink-0 me-2" width="24" height="24">
<use xlink:href="#exclamation-triangle-fill" />
</svg>
<?= $error ?>
<button type="button" class="btn-close" data-bs-dismiss="alert"></button>
</div>

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tasks/guestBookDB/components/newComment.php Normal file
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<form action="" method="post" class="needs-validation row g-3 m-0 position-relative" novalidate>
<h1 class="text-danger position-absolute construction">Under Construction</h1>
<fieldset disabled class="mt-0 opacity-50">
<div class="col m-0 g-3">
<h4 class="mb-3">Leave a Comment!</h4>
<div class="mb-3">
<input class="form-control" type="text" name="title" required placeholder="A catching title" />
<div class="invalid-feedback">
Please enter a title.
</div>
</div>
<div class="mb-3">
<input class="form-control" type="text" name="name" required placeholder="Your name" />
<div class="invalid-feedback">
Please enter a name.
</div>
</div>
<div class="mb-1">
<textarea class="form-control" id="comment" name="comment" maxlength="250" required placeholder="Comment here"></textarea>
<div class="invalid-feedback">
Please enter text.
</div>
</div>
<div class="progress mb-2">
<div class="progress-bar" id="comment-count" style="width: 0;"></div>
</div>
<button type="submit" class="btn btn-primary mb-3">Comment</button>
</div>
</fieldset>
</form>

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tasks/guestBookDB/components/pagination.php Normal file
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<nav>
<ul class="pagination justify-content-center">
<li class="page-item">
<a class="page-link <?php if ($page === 0) echo "disabled" ?>" href="?p=<?= $page > 0 ? $page - 1 : 0 ?>">
<span aria-hidden="true">&laquo;</span>
</a>
</li>
<?php for ($i = 0; $i <= $maxPage; $i++) { ?>
<li class="page-item <?php if ($page === $i) echo "active" ?>">
<a class="page-link" href="?p=<?= $i ?>"><?= $i + 1 ?></a>
</li>
<?php } ?>
<li class="page-item">
<a class="page-link <?php if ($page === $maxPage) echo "disabled" ?>" href="?p=<?= $page < $maxPage ? $page + 1 : $maxPage ?>">
<span aria-hidden="true">&raquo;</span>
</a>
</li>
</ul>
</nav>

18
tasks/guestBookDB/css/styles.css Normal file
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.opacity-50 {
opacity: 50%
}
.construction {
z-index: 10;
rotate: -10deg;
width: fit-content;
height: fit-content;
left: 0;
right: 0;
margin-left: auto;
margin-right: auto;
top: 0;
bottom: 0;
margin-top: auto;
margin-bottom: auto;
}

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tasks/guestBookDB/index.php Normal file
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<!DOCTYPE html>
<html lang="en">
<head>
<?php include_once "../../base/meta.php" ?>
<title>Guest Book DB</title>
<script src="./js/formValidation.js"></script>
<script src="./js/textarea.js"></script>
<link href="./css/styles.css" rel="stylesheet" />
</head>
<body>
<?php
// HTML
include_once "../../base/icons.php";
// PHP
include_once "../../base/settings.php";
include_once "../../base/headers.php";
Headers::html();
include_once "../../base/database.php";
include_once "./queries.php";
session_name("PHP_SESSION_guestBook");
session_start();
$errors = $_SESSION["error"] ?? [];
$_SESSION["error"] = [];
if (isset($_GET["p"]) && !is_numeric($_GET["p"])) {
Headers::redirect(".");
return;
}
$page = isset($_GET["p"]) ? intval($_GET["p"]) : 0;
$db = DB::openConnection();
$stmt = $db->prepare($countQuery);
$stmt->execute();
$maxPage = intdiv($stmt->fetch(PDO::FETCH_COLUMN), 9);
if ($page > $maxPage) {
Headers::redirect("./?p=$maxPage");
return;
}
$stmt = $db->prepare($dataQuery . $page * 9);
$stmt->execute();
$data = $stmt->fetchAll();
DB::closeConnection($db);
?>
<div class="container-fluid p-0">
<nav class="navbar navbar-expand-lg navbar-light bg-light">
<div class="container-fluid">
<a class="navbar-brand" href="#">Guest Book</a>
</div>
</nav>
<div class="row m-0">
<div class="col">
<?php foreach ($errors as $error) {
include "./components/error.php";
} ?>
</div>
</div>
<div class="row row-cols-1 row-cols-lg-3 g-3 m-0 mb-3">
<?php foreach ($data as $comment) {
include "./components/comment.php";
} ?>
</div>
<?php include "./components/pagination.php" ?>
<hr />
<?php include "./components/newComment.php" ?>
</div>
</body>
</html>

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tasks/guestBookDB/js/formValidation.js Normal file
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"use strict";
document.addEventListener("DOMContentLoaded", () => {
const handler = (event) => {
if (!event.target.checkValidity()) {
event.preventDefault();
event.stopPropagation();
}
event.target.classList.add("was-validated");
};
const addValidation = () => {
const forms = document.querySelectorAll(".needs-validation");
Array.from(forms).forEach((form) => {
form.addEventListener("submit", handler, false);
});
};
addValidation();
});

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tasks/guestBookDB/js/textarea.js Normal file
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"use strict";
document.addEventListener("DOMContentLoaded", () => {
const handlerCounter = (event) => {
const comment = event.target;
const length = comment.value.length;
const maxLength = comment.maxLength;
const counter = document.getElementById("comment-count");
if (length >= 50) {
counter.innerText = `${length}/${maxLength}`;
} else {
counter.innerText = "";
}
counter.style.width = `${(length / maxLength) * 100}%`;
if (length === maxLength) {
counter.classList.remove("bg-warning");
counter.classList.add("bg-danger");
} else if (length > maxLength - 50) {
counter.classList.remove("bg-danger");
counter.classList.add("bg-warning");
} else {
counter.classList.remove("bg-warning");
counter.classList.remove("bg-danger");
}
};
const addValidation = () => {
const comment = document.getElementById("comment");
comment.addEventListener("input", handlerCounter);
};
addValidation();
});

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tasks/guestBookDB/queries.php Normal file
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<?php
$dataQuery = "
SELECT
B.beitrag AS comment,
DATE_FORMAT(B.zeitstempel, '%d.%m.%y %H:%i') AS time,
U.benutzer AS name
FROM
egb_gaestebuch AS B,
egb_benutzer AS U
WHERE
B.benutzer_id = U.id
ORDER BY
B.zeitstempel DESC
LIMIT 9
OFFSET ";
$countQuery = "
SELECT
COUNT(*)
FROM
egb_gaestebuch";