DataBaseArticleManager + Methoden

search-Methode muss noch implementiert werden...

.idea/dataSources/315cb5c9-2b0f-435b-b602-59823b160908/storage_v2/_src_/schema/main.uQUzAA.meta

@@ -0,0 +1,2 @@
+#n:main
+!<md> [0, 0, null, null, -2147483648, -2147483648]

.idea/dataSources/a0abcd0a-1d6f-40e4-88be-f442bcb431ba/storage_v2/_src_/schema/main.uQUzAA.meta

@@ -0,0 +1,2 @@
+#n:main
+!<md> [0, 0, null, null, -2147483648, -2147483648]

.idea/dataSources/data_sources_history.xml

@@ -0,0 +1,42 @@
+<DataSourcesHistory>
+  <DataSourceFromHistory isRemovedFromProject="true">
+    <data-source source="LOCAL" name="articles" uuid="a0abcd0a-1d6f-40e4-88be-f442bcb431ba">
+      <database-info product="SQLite" version="3.51.1" jdbc-version="4.2" driver-name="SQLite JDBC" driver-version="3.51.1.0" dbms="SQLITE" exact-version="3.51.1" exact-driver-version="3.51">
+        <identifier-quote-string>&quot;</identifier-quote-string>
+      </database-info>
+      <case-sensitivity plain-identifiers="mixed" quoted-identifiers="mixed" />
+      <driver-ref>sqlite.xerial</driver-ref>
+      <synchronize>true</synchronize>
+      <jdbc-driver>org.sqlite.JDBC</jdbc-driver>
+      <jdbc-url>jdbc:sqlite:$PROJECT_DIR$/db/articles</jdbc-url>
+      <secret-storage>master_key</secret-storage>
+      <auth-provider>no-auth</auth-provider>
+      <schema-mapping>
+        <introspection-scope>
+          <node kind="schema" qname="@" />
+        </introspection-scope>
+      </schema-mapping>
+      <working-dir>$ProjectFileDir$</working-dir>
+    </data-source>
+  </DataSourceFromHistory>
+  <DataSourceFromHistory isRemovedFromProject="false">
+    <data-source source="LOCAL" name="articles" uuid="315cb5c9-2b0f-435b-b602-59823b160908">
+      <database-info product="SQLite" version="3.51.1" jdbc-version="4.2" driver-name="SQLite JDBC" driver-version="3.51.1.0" dbms="SQLITE" exact-version="3.51.1" exact-driver-version="3.51">
+        <identifier-quote-string>&quot;</identifier-quote-string>
+      </database-info>
+      <case-sensitivity plain-identifiers="mixed" quoted-identifiers="mixed" />
+      <driver-ref>sqlite.xerial</driver-ref>
+      <synchronize>true</synchronize>
+      <jdbc-driver>org.sqlite.JDBC</jdbc-driver>
+      <jdbc-url>jdbc:sqlite:$PROJECT_DIR$/db/articles</jdbc-url>
+      <secret-storage>master_key</secret-storage>
+      <auth-provider>no-auth</auth-provider>
+      <schema-mapping>
+        <introspection-scope>
+          <node kind="schema" qname="@" />
+        </introspection-scope>
+      </schema-mapping>
+      <working-dir>$ProjectFileDir$</working-dir>
+    </data-source>
+  </DataSourceFromHistory>
+</DataSourcesHistory>

php/model/ArticleManagerDAO.php

@@ -20,8 +20,7 @@ interface ArticleManagerDAO
      * @param $category string Kategorie des Beitrages
      * @param $tags string optionale Schlagworte für eine bessere Suche
      *
-     * Mögliche Exceptions:
+     * @throws InternalServerErrorException
-     * TODO: Exceptions implementieren.
      */
     public function addArticle($title, $content, $author, $category, $tags);
 
@@ -37,16 +36,17 @@ interface ArticleManagerDAO
      * @throws InternalServerErrorException
      * @throws NotFoundException
      * @throws UnauthorizedAccessException
-     * /
      */
     public function updateArticle($id, $article, $author);
 
     /**
      * Löscht einen Beitrag aus übergebener ID.
+     * TODO: sollte auch die Autorisierung prüfen...
      * @param $id
      * @return void
-     *
+     * @throws InternalServerErrorException
-     * TODO: Exceptions implementieren.
+     * @throws NotFoundException
+     * @throws UnauthorizedAccessException
      */
     public function deleteArticle($id);
 
@@ -55,16 +55,14 @@ interface ArticleManagerDAO
      * $id ID des Beitrags
      *
      * @return Article
-     * Mögliche Exceptions:
+     * @throws InternalServerErrorException
-     * TODO: Exceptions implementieren.
      */
     public function getArticle($id);
 
     /**
      * Alle Beiträge aufrufen.
      *
-     * Mögliche Exceptions:
+     * @throws InternalServerErrorException
-     * TODO: Exceptions implementieren.
      */
     public function getAllArticles();
 
@@ -72,7 +70,7 @@ interface ArticleManagerDAO
      * Gibt alle Beiträge eines Nutzer mit einer gegebenen ID aus.
      * @param $author
      * @return Article[]
-     * TODO: Exceptions implementieren.
+     * @throws InternalServerErrorException
      */
     public function getArticlesByAuthor($author);
 
@@ -89,6 +87,7 @@ interface ArticleManagerDAO
      * Gibt alle Beiträge einer gegebenen Kategorie aus.
      * @param $category
      * @return mixed
+     * @throws InternalServerErrorException
      */
     public function getArticlesByCategory($category);
 

php/model/DatabaseArticleManager.php

@@ -0,0 +1,306 @@
+<?php
+require_once 'ArticleManagerDAO.php';
+require_once 'Article.php';
+/**
+ * Klasse: Eine SQLLite3 Lösung des ArticleManagerDAO.
+ *
+ * @author Niklas Ortmann
+ */
+class DatabaseArticleManager implements ArticleManagerDAO {
+
+    private static $instance = null;
+
+    /**
+     * Konstruktor
+     *
+     * Erstellt die Datenbankverbindung und die Tabelle articles.
+     * @throws InternalServerErrorException
+     */
+    public function __construct()
+    {
+        if (!file_exists("../../db/articles.db")) {
+            try {
+                $user = 'root';
+                $pw = null;
+                $dsn = 'sqlite: ../../db/articles.db';
+                $db = new PDO($dsn, $user, $pw);
+
+                $db->exec("
+                    CREATE TABLE articles (
+                        id INTEGER PRIMARY KEY AUTOINCREMENT,
+                        title TEXT,
+                        content TEXT,
+                        author TEXT,
+                        category TEXT,
+                        tags TEXT,
+                        created TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+                    );");
+                unset($db);
+            } catch (PDOException $e) {
+                throw new InternalServerErrorException($e->getMessage());
+            }
+        }
+    }
+
+    /**
+     * Baut die Verbindung zur Datenbank auf.
+     * @throws InternalServerErrorException
+     */
+    private function getConnection()
+    {
+        try {
+            $user = 'root';
+            $pw = null;
+            $dsn = 'sqlite: ../../db/gaestebuch.db';
+            return new PDO($dsn, $user, $pw);
+        } catch (PDOException $e) {
+            throw new InternalServerErrorException($e->getMessage());
+        }
+    }
+
+    /**
+     * Gibt die DatabaseArticleManager-Instanz zurück.
+     * @return DatabaseArticleManager
+     */
+    public static function getInstance()
+    {
+        if (self::$instance == null) {
+            self::$instance = new DatabaseArticleManager();
+        }
+        return self::$instance;
+    }
+
+    public function addArticle($title, $content, $author, $category, $tags)
+    {
+        try {
+            $db = $this->getConnection();
+
+            $sql = "INSERT INTO articles (title, content, author, category, tags) 
+                    VALUES (:title, :content, :author, :category, :tags);";
+
+            $command = $db->prepare($sql);
+            if (!$command) {
+                throw new InternalServerErrorException("internal_error");
+            }
+
+            // Verknüpft die übergebenen Parameter exakt mit den SQL-Platzhaltern
+            $success = $command->execute([
+                ":title"    => $title,
+                ":content"  => $content,
+                ":author"   => $author,
+                ":category" => $category,
+                ":tags"     => $tags
+            ]);
+
+            if (!$success) {
+                throw new InternalServerErrorException("internal_error");
+            }
+
+            return intval($db->lastInsertId());
+
+        } catch (PDOException $e) {
+            throw new InternalServerErrorException($e->getMessage());
+        }
+    }
+
+    public function updateArticle($id, $article, $author)
+    {
+        if (empty($article)) {
+            throw new InternalServerErrorException("internal_error");
+        }
+
+        // Berechtigungsprüfung analog zur lokalen Implementierung:
+        if ($article->getAuthor() !== $author) {
+            throw new UnauthorizedAccessException("unauthorized_access");
+        }
+
+        try {
+            $db = $this->getConnection();
+
+            $sql = "UPDATE articles 
+                    SET title = :title, content = :content, author = :author, category = :category, tags = :tags 
+                    WHERE id = :id;";
+
+            $command = $db->prepare($sql);
+            if (!$command) {
+                throw new InternalServerErrorException("internal_error");
+            }
+
+            $success = $command->execute([
+                ":id"       => $id,
+                ":title"    => $article->getTitle(),
+                ":content"  => $article->getContent(),
+                ":author"   => $author,
+                ":category" => $article->getCategory(),
+                ":tags"     => $article->getTags()
+            ]);
+
+            // rowCount() prüft, ob eine Zeile mit dieser ID existierte und geändert werden konnte
+            if (!$success || $command->rowCount() === 0) {
+                // Falls die ID nicht existiert, prüfen wir, ob sie überhaupt da ist
+                if (!$this->getArticle($id)) {
+                    throw new NotFoundException("missing_id");
+                }
+            }
+        } catch (PDOException $e) {
+            throw new InternalServerErrorException("internal_error");
+        }
+    }
+
+    public function deleteArticle($id)
+    {
+        // TODO: Sollte auch die Autorisierung prüfen...
+        try {
+            $db = $this->getConnection();
+            $sql = "DELETE FROM articles WHERE id = :id;";
+
+            $command = $db->prepare($sql);
+            if (!$command) {
+                throw new InternalServerErrorException("internal_error");
+            }
+
+            if (!$command->execute([":id" => $id])) {
+                throw new InternalServerErrorException("internal_error");
+            }
+        } catch (PDOException $exc) {
+            throw new InternalServerErrorException("internal_error");
+        }
+    }
+
+    public function getArticle($id)
+    {
+        try {
+            $db = $this->getConnection();
+            $sql = "SELECT * FROM articles WHERE id = :id;";
+
+            $command = $db->prepare($sql);
+            if (!$command) {
+                throw new InternalServerErrorException("internal_error");
+            }
+
+            $command->execute([":id" => $id]);
+            $row = $command->fetch(PDO::FETCH_ASSOC);
+
+            if ($row) {
+                return new Article(
+                    intval($row['id']),
+                    $row['title'],
+                    $row['content'],
+                    $row['author'],
+                    $row['category'],
+                    $row['tags'],
+                    $row['created']
+                );
+            }
+
+            return null;
+        } catch (PDOException $e) {
+            throw new InternalServerErrorException("internal_error");
+        }
+    }
+
+    public function getAllArticles()
+    {
+        try {
+            $db = $this->getConnection();
+            $sql = "SELECT * FROM articles;";
+
+            $command = $db->query($sql);
+            if (!$command) {
+                throw new InternalServerErrorException("internal_error");
+            }
+
+            $rows = $command->fetchAll(PDO::FETCH_ASSOC);
+            $articles = [];
+
+            foreach ($rows as $row) {
+                $articles[] = new Article(
+                    intval($row['id']),
+                    $row['title'],
+                    $row['content'],
+                    $row['author'],
+                    $row['category'],
+                    $row['tags'],
+                    $row['created']
+                );
+            }
+
+            return $articles;
+        } catch (PDOException $e) {
+            throw new InternalServerErrorException("internal_error");
+        }
+    }
+
+    public function getArticlesByAuthor($author)
+    {
+        try {
+            $db = $this->getConnection();
+            $sql = "SELECT * FROM articles WHERE author = :author;";
+
+            $command = $db->prepare($sql);
+            if (!$command) {
+                throw new InternalServerErrorException("internal_error");
+            }
+
+            $command->execute([":author" => $author]);
+            $rows = $command->fetchAll(PDO::FETCH_ASSOC);
+            $filteredArticles = [];
+
+            foreach ($rows as $row) {
+                $filteredArticles[] = new Article(
+                    intval($row['id']),
+                    $row['title'],
+                    $row['content'],
+                    $row['author'],
+                    $row['category'],
+                    $row['tags'],
+                    $row['created']
+                );
+            }
+
+            return $filteredArticles;
+        } catch (PDOException $e) {
+            throw new InternalServerErrorException("internal_error");
+        }
+    }
+
+    public function getArticlesByCategory($category)
+    {
+        try {
+            $db = $this->getConnection();
+            $sql = "SELECT * FROM articles WHERE category = :category;";
+
+            $command = $db->prepare($sql);
+            if (!$command) {
+                throw new InternalServerErrorException("internal_error");
+            }
+
+            $command->execute([":category" => $category]);
+            $rows = $command->fetchAll(PDO::FETCH_ASSOC);
+            $filteredArticles = [];
+
+            foreach ($rows as $row) {
+                $filteredArticles[] = new Article(
+                    intval($row['id']),
+                    $row['title'],
+                    $row['content'],
+                    $row['author'],
+                    $row['category'],
+                    $row['tags'],
+                    $row['created']
+                );
+            }
+
+            return $filteredArticles;
+        } catch (PDOException $exc) {
+            throw new InternalServerErrorException("internal_error");
+        }
+    }
+
+    public function search(string $keyword): array
+    {
+        // TODO: implement search()
+        return [];
+    }
+
+}

php/model/LocalArticleManager.php

@@ -104,6 +104,7 @@ class LocalArticleManager implements ArticleManagerDAO {
 
     public function deleteArticle($id)
     {
+        // TODO: Sollte auch die Autorisierung prüfen...
         $articles = $this->getAllArticles();
         $articleFound = false;