Merge pull request 'Add option to make comments invisible (not having to delete them). This is for moderation purposes.' (#3) from development into main

Reviewed-on: #3

includes/chat_reading_model.inc.php

@@ -3,7 +3,7 @@
 declare(strict_types=1);
 
 function retrieve_chat_history(object $pdo){
-    $query = "SELECT username, content, date_sent FROM comments;";
+    $query = "SELECT username, content, date_sent FROM comments WHERE visible=true;";
 
     $stmt = $pdo->prepare($query);
     $stmt->execute();

includes/comments_db.sql

@@ -2,6 +2,7 @@ CREATE TABLE comments (
 	id INT(11) NOT NULL AUTO_INCREMENT,
     username VARCHAR(255) NOT NULL,
     content TEXT NOT NULL,
+    visible BOOLEAN DEFAULT 1,
     date_sent DATETIME DEFAULT CURRENT_TIME,
     users_id INT(11) NOT NULL,
     PRIMARY KEY (id),