Dynamische Daten in Seitentemplates eingefügt

webseite/classes/SubjectData.php

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+<?php
+require_once("Util.php");
+require_once("TopicData.php");
+
+class SubjectData
+{
+    public string $id;
+    public string $displayName;
+    public string $description;
+    public string $color;
+    public string $buttonText;
+    public string $icon;
+    public array $topics;
+
+    public static function getAll() : array
+    {
+        $result = array();
+
+        $subjectDirectory = "config/subjects";
+        $subjectNames = scandir($subjectDirectory);
+        foreach ($subjectNames as $subjectName) {
+            if ($subjectName == "." || $subjectName == "..") {
+                continue;
+            }
+
+            $subjectData = SubjectData::fromName($subjectName);
+            if(!isset($subjectData)) {
+                continue;
+            }
+
+            $result[] = $subjectData;
+        }
+
+        return $result;
+    }
+
+    public static function fromName($subjectName) : SubjectData|null
+    {
+        $result = new SubjectData();
+
+        $subjectName = Util::removeIllegalCharacters($subjectName);
+
+        $subjectDirectory = "config/subjects/$subjectName";
+        $filename = "$subjectDirectory/properties.json";
+        $data = Util::parseJsonFromFile($filename);
+
+        $result->id = $subjectName;
+
+        if(isset($data->displayName)) {
+            $result->displayName = $data->displayName;
+        } else {
+            return null;
+        }
+
+        if(isset($data->description)) {
+            $result->description = $data->description;
+        } else {
+            return null;
+        }
+
+        if(isset($data->color)) {
+            $result->color = $data->color;
+        } else {
+            return null;
+        }
+
+        if(isset($data->buttonText)) {
+            $result->buttonText = $data->buttonText;
+        } else {
+            return null;
+        }
+
+        if(isset($data->icon)) {
+            $result->icon = $data->icon;
+        } else {
+            return null;
+        }
+
+        $result->topics = TopicData::getAll($subjectName);
+
+        return $result;
+    }
+}

webseite/classes/TopicData.php

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+<?php
+require_once("Util.php");
+
+class TopicData
+{
+    public string $id;
+    public string $subjectId;
+    public string $displayName;
+    public string $icon;
+    public string $description;
+    public array $relatedTopics;
+    public array $files;
+    public string $article;
+
+    public static function getAll($subjectName) : array
+    {
+        $result = array();
+
+        $topicDirectory = "config/subjects/$subjectName/topics";
+        $topicNames = scandir($topicDirectory);
+        foreach ($topicNames as $topicName) {
+            if ($topicName == "." || $topicName == "..") {
+                continue;
+            }
+            $topicData = TopicData::fromName($subjectName, $topicName);
+            if(!isset($topicData)) {
+                continue;
+            }
+
+            $result[] = $topicData;
+        }
+
+        return $result;
+    }
+
+    public static function fromName($subjectName, $topicName): TopicData|null
+    {
+        $result = new TopicData();
+
+        $subjectName = Util::removeIllegalCharacters($subjectName);
+        $topicName = Util::removeIllegalCharacters($topicName);
+
+        $topicDirectory = "config/subjects/$subjectName/topics";
+        $filename = "$topicDirectory/$topicName/properties.json";
+        $data = Util::parseJsonFromFile($filename);
+
+        $result->id = $topicName;
+        $result->subjectId = $subjectName;
+
+        if(isset($data->displayName)) {
+            $result->displayName = $data->displayName;
+        } else {
+            return null;
+        }
+
+        if(isset($data->icon)) {
+            $result->icon = $data->icon;
+        } else {
+            return null;
+        }
+
+        if(isset($data->description)) {
+            $result->description = $data->description;
+        } else {
+            return null;
+        }
+
+        if(isset($data->relatedTopics)) {
+            $result->relatedTopics = $data->relatedTopics;
+        } else {
+            $result->relatedTopics = array();
+        }
+        if(isset($data->files)) {
+            $result->files = $data->files;
+        } else {
+            $result->files = array();
+        }
+
+        if(isset($data->article)) {
+            $result->article = $data->article;
+        } else {
+            return null;
+        }
+
+        return $result;
+    }
+
+}

webseite/classes/Util.php

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+<?php
+
+class Util
+{
+    static function removeIllegalCharacters($string): string
+    {
+        return preg_replace("/[^a-zA-Z0-9_-]/", "", $string);
+    }
+
+    static function parseJsonFromFile($filename): mixed
+    {
+        $file = fopen($filename, "r") or die("Unable to open file!");
+        $fileContent = fread($file, filesize($filename));
+        fclose($file);
+
+        return json_decode($fileContent);
+    }
+}