Add f7push webhook for support replies and ticket deep links.

OCS endpoint for support.f7cloud.ru, notification notifier, and ?ticket= URL opening in the client UI.

lib/Service/ConfigService.php

@@ -0,0 +1,42 @@
+<?php
+
+declare(strict_types=1);
+
+namespace OCA\F7Support\Service;
+
+use OCP\IConfig;
+
+class ConfigService {
+	public const APP_ID = 'f7support';
+
+	public function __construct(
+		private IConfig $config,
+	) {
+	}
+
+	public function isPushEnabled(): bool {
+		return $this->config->getAppValue(self::APP_ID, 'push_enabled', 'yes') === 'yes';
+	}
+
+	public function getPushWebhookSecret(): string {
+		return trim($this->config->getAppValue(self::APP_ID, 'push_webhook_secret', ''));
+	}
+
+	public function verifyPushWebhookSecret(?string $provided): bool {
+		if ($provided === null || $provided === '') {
+			return false;
+		}
+
+		$own = $this->getPushWebhookSecret();
+		if ($own !== '' && hash_equals($own, $provided)) {
+			return true;
+		}
+
+		$f7pushSecret = trim($this->config->getAppValue('f7push', 'api_secret', ''));
+		if ($f7pushSecret !== '' && hash_equals($f7pushSecret, $provided)) {
+			return true;
+		}
+
+		return false;
+	}
+}