webprogrammierung/php/controller/createArticle-controller.php

<?php
if (session_status() === PHP_SESSION_NONE) {
    session_start();
}
require_once '../model/LocalArticleManager.php';
require_once '../model/ArticleManager.php';
require_once '../validator/article-validator.php';

    if ($_SERVER["REQUEST_METHOD"] === "POST") {
        $_SESSION["old_title"]    = $_POST["title"] ?? '';
        $_SESSION["old_content"]  = $_POST["content"] ?? '';
        $_SESSION["old_category"] = $_POST["category"] ?? '';
        $_SESSION["old_tags"]     = $_POST["tags"] ?? '';

        if(!isset($_POST["title"]) ||!isset($_POST["content"]) || !isset($_POST["category"])){
            $_SESSION["message"] = "missing_parameters";
            header("location: ../../index.php?pfad=createArticle");
            exit();
        } else {
            $title = $_POST["title"];
            $content = $_POST["content"];
            $author = $_SESSION["user_email"];
            $category = $_POST["category"];
            $tags = $_POST['tags'] ?? '';

            // -------------------------------- Validierung der Daten: -------------------------
            if (!articleAuthorValidator($author)) {
                $_SESSION["message"] = "author_not_valid";
                header("location: ../../index.php?pfad=createArticle");
                exit();
            }

            if (!articleTitleValidator($title)) {
                $_SESSION["message"] = "invalid_title";
                header("location: ../../index.php?pfad=createArticle");
                exit();
            }

            if (!articleContentValidator($content)) {
                $_SESSION["message"] = "invalid_content";
                header("location: ../../index.php?pfad=createArticle");
                exit();
            }

            if (!articleCategoryValidator($category)) {
                $_SESSION["message"] = "invalid_category";
                header("location: ../../index.php?pfad=createArticle");
                exit();
            }

            if (!articleTagValidator($tags)) {
                $_SESSION["message"] = "invalid_tags";
                header("location: ../../index.php?pfad=createArticle");
                exit();
            } else {
                $cleanedTags = [];
                $rawTags = explode(',', $tags);
                foreach ($rawTags as $rawTag) {
                    // Leerzeichen am Anfang/Ende des einzelnen Tags entfernen:
                    $tag = trim($rawTag);
                    $cleanedTags[] = $tag;
                }
                // Duplikate entfernen:
                $cleanedTags = array_unique($cleanedTags);
                $cleanedTags = implode(',', $cleanedTags);
            }

            // ----------------- Base64-Bilder verarbeiten und auf Server speichern -----------------
            $blocks = json_decode($content, true);
            $uploadDir = __DIR__ . '/../../uploads/';

            if (!file_exists($uploadDir)) {
                mkdir($uploadDir, 0755, true);
            }

            foreach ($blocks as &$block) {
                // Base64-Format-Prüfung:
                if ($block['type'] === 'image' && str_starts_with($block['value'], 'data:image/')) {

                    // Base64-String zerlegen:
                    log_alert("Bild erkannt, verarbeite...");
                    $parts = explode(',', $block['value']);
                    $metadata = $parts[0];
                    $base64Data = $parts[1];

                    // Dateiendung ermitteln
                    preg_match('/data:image\/(?<extension>.*?);/', $metadata, $matches);
                    $extension = $matches['extension'] ?? 'jpg';
                    if ($extension === 'jpeg') { $extension = 'jpg'; }

                    // Eindeutigen Dateinamen generieren
                    $fileName = 'img_' . uniqid() . '.' . $extension;
                    $filePath = $uploadDir . $fileName;

                    // Datei im /uploads speichern:
                    if (file_put_contents($filePath, base64_decode($base64Data)) !== false) {
                        // temporären Base64-String durch den echten Pfad ersetzen
                        $block['value'] = 'uploads/' . $fileName;
                    } else {
                        $_SESSION["message"] = "image_upload_error";
                        header("location: ../../index.php?pfad=createArticle");
                        exit();
                    }
                }
            }
            unset($block);

            // Aktualisiertes Array wieder in JSON konvertieren
            $finalContent = json_encode($blocks, JSON_UNESCAPED_UNICODE);

            // ----------------- Übertragung der validierten Daten in ArticleManager: ---------------------------
            try {
                $articleManager = ArticleManager::getInstance();
                $articleManager->addArticle($title, $finalContent, $author, $category, $cleanedTags);

                // Formulardaten nach erfolgreichem Erstellen aus der Session löschen
                unset($_SESSION["old_title"], $_SESSION["old_content"], $_SESSION["old_category"], $_SESSION["old_tags"]);

            } catch (Exception $e){
                $_SESSION["message"] = "internal_error";
                header("location: ../../index.php?pfad=createArticle");
                exit();
            }

            $_SESSION["message"] = "new_article";
            // Weiterleitung zur Homepage
            header("location: ../../index.php");
            exit();
        }
    }
?>