Kommentare bearbeiten
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@@ -0,0 +1,92 @@
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<?php
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if (session_status() === PHP_SESSION_NONE) {
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session_start();
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}
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require_once "php/model/CommentManager.php";
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if ($_SERVER["REQUEST_METHOD"] !== "POST") {
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header("Location: index.php");
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exit();
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}
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if (!isset($_SESSION["user_email"])) {
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header("Location: index.php?pfad=login");
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exit();
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}
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$commentId = filter_input(
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INPUT_POST,
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"comment_id",
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FILTER_VALIDATE_INT
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);
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$articleId = filter_input(
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INPUT_POST,
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"article_id",
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FILTER_VALIDATE_INT
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);
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$content = trim($_POST["content"] ?? "");
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/*
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* Ohne gültige Beitrags-ID kann nicht sicher
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* zum ursprünglichen Beitrag zurückgeleitet werden.
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*/
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if (!$articleId) {
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header("Location: index.php");
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exit();
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}
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/*
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* Kommentar-ID und Inhalt werden geprüft.
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*/
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if (!$commentId || $content === "") {
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$_SESSION["comment_message"] =
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"Der Kommentar darf nicht leer sein.";
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$_SESSION["comment_message_type"] = "error";
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header(
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"Location: index.php?pfad=showArticle&id="
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. urlencode((string) $articleId)
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. "#comments"
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);
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exit();
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}
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try {
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$commentManager = CommentManager::getInstance();
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$updated = $commentManager->updateComment(
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$commentId,
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$_SESSION["user_email"],
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$content
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);
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if ($updated) {
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$_SESSION["comment_message"] =
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"Der Kommentar wurde erfolgreich bearbeitet.";
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$_SESSION["comment_message_type"] = "success";
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} else {
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$_SESSION["comment_message"] =
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"Der Kommentar konnte nicht bearbeitet werden.";
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$_SESSION["comment_message_type"] = "error";
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}
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} catch (Throwable $e) {
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$_SESSION["comment_message"] =
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"Beim Bearbeiten des Kommentars ist ein Fehler aufgetreten.";
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$_SESSION["comment_message_type"] = "error";
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}
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header(
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"Location: index.php?pfad=showArticle&id="
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. urlencode((string) $articleId)
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. "#comments"
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);
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exit();
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@@ -72,4 +72,19 @@ interface CommentManagerDAO
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* @return void
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*/
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public function deleteCommentsByAuthor(string $author): void;
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/**
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* Bearbeitet einen Kommentar des angemeldeten Nutzers.
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*
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* Nur der Autor des Kommentars darf den Inhalt ändern.
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*
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* @param int $commentId ID des Kommentars
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* @param string $author E-Mail-Adresse des Autors
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* @param string $content Neuer Kommentarinhalt
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* @return bool true, wenn der Kommentar bearbeitet wurde
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*/
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public function updateComment(
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int $commentId,
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string $author,
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string $content
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): bool;
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}
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@@ -223,6 +223,44 @@ class DatabaseCommentManager implements CommentManagerDAO
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return $comments;
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}
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/**
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* Bearbeitet einen eigenen Kommentar.
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*
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* Der Kommentar wird nur geändert, wenn er dem
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* angemeldeten Nutzer gehört.
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*
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* @param int $commentId ID des Kommentars
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* @param string $author E-Mail-Adresse des Autors
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* @param string $content Neuer Kommentarinhalt
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* @return bool true, wenn der Kommentar bearbeitet wurde
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*/
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public function updateComment(
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int $commentId,
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string $author,
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string $content
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): bool {
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try {
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$db = $this->getConnection();
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$command = $db->prepare("
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UPDATE comments
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SET content = :content
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WHERE id = :commentId
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AND author = :author
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");
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$command->execute([
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":content" => $content,
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":commentId" => $commentId,
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":author" => $author
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]);
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return $command->rowCount() > 0;
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} catch (PDOException $e) {
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throw new RuntimeException("internal_error");
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}
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}
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/**
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* Löscht einen eigenen Kommentar.
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*
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