Allow to disable notifications

migrations/000008.php

@@ -0,0 +1,11 @@
+<?php
+// This migration adds a "activated" column to the subscriptions table and sets all values to true.
+
+/** @noinspection PhpUndefinedVariableInspection */
+$columnQuery = $db->query("SELECT * FROM pragma_table_info('subscriptions') WHERE name='inactive'");
+$columnRequired = $columnQuery->fetchArray(SQLITE3_ASSOC) === false;
+
+if ($columnRequired) {
+    $db->exec('ALTER TABLE subscriptions ADD COLUMN inactive BOOLEAN DEFAULT false');
+    $db->exec('UPDATE subscriptions SET inactive = false');
+}