Antwortmöglichkeit

php/model/DatabaseCommentManager.php

@@ -16,6 +16,8 @@ class DatabaseCommentManager implements CommentManagerDAO
     /**
      * Erstellt die Kommentartabelle,
      * falls diese noch nicht existiert.
+     *
+     * Zusätzlich wird geprüft, ob die Spalte parent_comment_id existiert.
      */
     public function __construct()
     {
@@ -26,12 +28,27 @@ class DatabaseCommentManager implements CommentManagerDAO
                 CREATE TABLE IF NOT EXISTS comments (
                     id INTEGER PRIMARY KEY AUTOINCREMENT,
                     article_id INTEGER NOT NULL,
+                    parent_comment_id INTEGER NULL,
                     author TEXT NOT NULL,
                     content TEXT NOT NULL,
                     created TIMESTAMP DEFAULT CURRENT_TIMESTAMP
                 );
             ");
 
+            $columns = $db->query("PRAGMA table_info(comments);")->fetchAll(PDO::FETCH_ASSOC);
+            $hasParentColumn = false;
+
+            foreach ($columns as $column) {
+                if ($column["name"] === "parent_comment_id") {
+                    $hasParentColumn = true;
+                    break;
+                }
+            }
+
+            if (!$hasParentColumn) {
+                $db->exec("ALTER TABLE comments ADD COLUMN parent_comment_id INTEGER NULL;");
+            }
+
             unset($db);
 
         } catch (PDOException $e) {
@@ -78,19 +95,20 @@ class DatabaseCommentManager implements CommentManagerDAO
     }
 
     /**
-     * Speichert einen neuen Kommentar
-     * zu einem Beitrag.
+     * Speichert einen neuen Kommentar oder eine Antwort.
      *
      * @param int $articleId ID des Beitrags
      * @param string $author Autor des Kommentars
      * @param string $content Inhalt des Kommentars
+     * @param int|null $parentCommentId ID des Eltern-Kommentars oder null
      *
      * @return void
      */
     public function addComment(
         $articleId,
         $author,
-        $content
+        $content,
+        $parentCommentId = null
     ) {
         try {
             $db = $this->getConnection();
@@ -98,11 +116,13 @@ class DatabaseCommentManager implements CommentManagerDAO
             $sql = "
                 INSERT INTO comments (
                     article_id,
+                    parent_comment_id,
                     author,
                     content
                 )
                 VALUES (
                     :articleId,
+                    :parentCommentId,
                     :author,
                     :content
                 )
@@ -112,6 +132,7 @@ class DatabaseCommentManager implements CommentManagerDAO
 
             $command->execute([
                 ":articleId" => $articleId,
+                ":parentCommentId" => $parentCommentId,
                 ":author" => $author,
                 ":content" => $content
             ]);
@@ -140,7 +161,7 @@ class DatabaseCommentManager implements CommentManagerDAO
                 SELECT *
                 FROM comments
                 WHERE article_id = :articleId
-                ORDER BY created DESC
+                ORDER BY created ASC
             ";
 
             $command = $db->prepare($sql);
@@ -152,10 +173,12 @@ class DatabaseCommentManager implements CommentManagerDAO
             $comments = [];
 
             while ($row = $command->fetch(PDO::FETCH_ASSOC)) {
-
                 $comments[] = new Comment(
-                    $row["id"],
-                    $row["article_id"],
+                    intval($row["id"]),
+                    intval($row["article_id"]),
+                    isset($row["parent_comment_id"]) && $row["parent_comment_id"] !== null
+                        ? intval($row["parent_comment_id"])
+                        : null,
                     $row["author"],
                     $row["content"],
                     $row["created"]
@@ -170,4 +193,4 @@ class DatabaseCommentManager implements CommentManagerDAO
             );
         }
     }
-}
+}