feat: Add offline monitoring and default settings

- Add offline_timeout and notify_on_offline fields to servers table
- Create default_settings table for configurable defaults
- Create offline_alerts table for tracking offline events
- Add sendOfflineNotification/sendOnlineNotification methods
- Create check_offline.php CRON script for periodic checks
- Add admin page for default settings management
- Add offline settings to server edit form
- Apply default values when creating new servers

Usage: Add to CRON - * * * * * php /var/www/mon/public/check_offline.php

docker/migrations/009_add_offline_settings.sql

@@ -0,0 +1,40 @@
+-- 009_add_offline_settings.sql
+-- Добавляет настройки для уведомлений при offline и дефолтные параметры
+
+-- Поля для offline уведомлений в таблице servers
+ALTER TABLE servers ADD COLUMN offline_timeout INT DEFAULT 300 COMMENT 'Таймаут в секундах до считания сервера offline (0 = выключено)';
+ALTER TABLE servers ADD COLUMN notify_on_offline TINYINT(1) DEFAULT 1 COMMENT 'Уведомлять при offline';
+ALTER TABLE servers ADD COLUMN last_offline_alert_at TIMESTAMP NULL COMMENT 'Время последнего алерта offline (анти-спам)';
+
+-- Таблица дефолтных параметров
+CREATE TABLE IF NOT EXISTS default_settings (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    setting_key VARCHAR(100) UNIQUE NOT NULL,
+    setting_value TEXT,
+    description TEXT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+-- Вставляем дефолтные значения
+INSERT INTO default_settings (setting_key, setting_value, description) VALUES
+('offline_check_interval', '60', 'Интервал проверки offline в секундах'),
+('default_offline_timeout', '300', 'Дефолтный таймаут offline в секундах'),
+('default_warning_threshold', '70', 'Дефолтный warning threshold (%)'),
+('default_critical_threshold', '90', 'Дефолтный critical threshold (%)'),
+('default_duration', '0', 'Дефолтная длительность превышения порога в минутах')
+ON DUPLICATE KEY UPDATE description = VALUES(description);
+
+-- Таблица для алертов offline (отдельная от метрик)
+CREATE TABLE IF NOT EXISTS offline_alerts (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    server_id INT NOT NULL,
+    triggered_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    resolved TINYINT(1) DEFAULT 0,
+    resolved_at TIMESTAMP NULL,
+    notified_at TIMESTAMP NULL,
+    FOREIGN KEY (server_id) REFERENCES servers(id) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+-- Индекс для быстрого поиска активных offline алертов
+CREATE INDEX idx_offline_alerts_active ON offline_alerts (server_id, resolved);

public/check_offline.php

@@ -0,0 +1,73 @@
+<?php
+// public/check_offline.php
+// CRON скрипт для проверки offline серверов и отправки уведомлений
+// Запуск: */1 * * * * php /var/www/mon/public/check_offline.php
+
+date_default_timezone_set("Asia/Irkutsk");
+
+require_once __DIR__ . '/../vendor/autoload.php';
+
+use Config\DatabaseConfig;
+use App\Services\NotificationService;
+
+echo "[" . date('Y-m-d H:i:s') . "] Checking offline servers...\n";
+
+$pdo = DatabaseConfig::getInstance();
+$notificationService = new NotificationService();
+
+$stmt = $pdo->query("
+    SELECT 
+        s.id,
+        s.name,
+        s.offline_timeout,
+        s.notify_on_offline,
+        s.last_offline_alert_at,
+        s.last_metrics_at,
+        TIMESTAMPDIFF(SECOND, s.last_metrics_at, NOW()) as seconds_since_update,
+        (SELECT COUNT(*) FROM offline_alerts oa WHERE oa.server_id = s.id AND oa.resolved = 0) as active_offline_alerts
+    FROM servers s
+    WHERE s.offline_timeout > 0
+");
+
+$servers = $stmt->fetchAll();
+
+foreach ($servers as $server) {
+    $timeout = (int)$server['offline_timeout'];
+    $secondsSinceUpdate = (int)$server['seconds_since_update'];
+    $isOffline = $secondsSinceUpdate > $timeout;
+    $activeAlerts = (int)$server['active_offline_alerts'];
+
+    if ($isOffline) {
+        if ($activeAlerts === 0) {
+            $stmtInsert = $pdo->prepare("
+                INSERT INTO offline_alerts (server_id, triggered_at, resolved, notified_at)
+                VALUES (:server_id, NOW(), 0, NOW())
+            ");
+            $stmtInsert->execute([':server_id' => $server['id']]);
+
+            if ($server['notify_on_offline']) {
+                $notificationService->sendOfflineNotification($server['name'], $secondsSinceUpdate);
+                echo "[OFFLINE] Server '{$server['name']}' is offline (no metrics for {$secondsSinceUpdate}s)\n";
+            }
+
+            $stmtUpdate = $pdo->prepare("
+                UPDATE servers SET last_offline_alert_at = NOW() WHERE id = :id
+            ");
+            $stmtUpdate->execute([':id' => $server['id']]);
+        }
+    } else {
+        if ($activeAlerts > 0) {
+            $stmtResolve = $pdo->prepare("
+                UPDATE offline_alerts 
+                SET resolved = 1, resolved_at = NOW() 
+                WHERE server_id = :server_id AND resolved = 0
+            ");
+            $stmtResolve->execute([':server_id' => $server['id']]);
+
+            $notificationService->sendOnlineNotification($server['name']);
+            echo "[ONLINE] Server '{$server['name']}' is back online\n";
+        }
+    }
+}
+
+echo "[" . date('Y-m-d H:i:s') . "] Offline check completed. Processed {$stmt->rowCount()} servers.\n";

public/index.php

@@ -210,6 +210,8 @@ $adminGroup = $app->group('/admin', function ($group) use ($adminController) {
     $group->get('/notifications', [$adminController, 'notificationSettings']);
     $group->post("/notifications/save", [$adminController, "saveNotificationSettings"]);
     $group->get("/notifications/test", [$adminController, "testNotification"]);
+    $group->get('/defaults', [$adminController, 'defaultSettings']);
+    $group->post("/defaults/save", [$adminController, "saveDefaultSettings"]);
 })->add($csrfMiddleware)->add(AuthMiddleware::class);
 
 // API route for agents (public, no auth middleware, no csrf)

src/Controllers/AdminController.php

@@ -5,6 +5,7 @@ namespace App\Controllers;
 
 use App\Models\Model;
 use App\Services\NotificationService;
+use PDO;
 use Psr\Http\Message\ResponseInterface as Response;
 use Psr\Http\Message\ServerRequestInterface as Request;
 use Slim\Views\Twig;
@@ -267,4 +268,60 @@ class AdminController extends Model
 
         return $response->withHeader('Location', '/admin/notifications')->withStatus(302);
     }
+
+    // ==================== ДЕФОЛТНЫЕ ПАРАМЕТРЫ ====================
+
+    public function defaultSettings(Request $request, Response $response, $args)
+    {
+        if ($_SESSION['role'] !== 'admin') {
+            return $response->withHeader('Location', '/')->withStatus(302);
+        }
+
+        $stmt = $this->pdo->query("SELECT * FROM default_settings ORDER BY id");
+        $settings = $stmt->fetchAll(PDO::FETCH_KEY_PAIR);
+
+        return $this->twig->render($response, 'admin/defaults.twig', [
+            'title' => 'Дефолтные параметры',
+            'settings' => $settings
+        ]);
+    }
+
+    public function saveDefaultSettings(Request $request, Response $response, $args)
+    {
+        if ($_SESSION['role'] !== 'admin') {
+            return $response->withHeader('Location', '/')->withStatus(302);
+        }
+
+        $data = $request->getParsedBody();
+
+        $settingsToUpdate = [
+            'offline_check_interval' => (int)($data['offline_check_interval'] ?? 60),
+            'default_offline_timeout' => (int)($data['default_offline_timeout'] ?? 300),
+            'default_warning_threshold' => (float)($data['default_warning_threshold'] ?? 70),
+            'default_critical_threshold' => (float)($data['default_critical_threshold'] ?? 90),
+            'default_duration' => (int)($data['default_duration'] ?? 0),
+        ];
+
+        foreach ($settingsToUpdate as $key => $value) {
+            $stmt = $this->pdo->prepare("
+                INSERT INTO default_settings (setting_key, setting_value)
+                VALUES (:key, :value)
+                ON DUPLICATE KEY UPDATE setting_value = :value2
+            ");
+            $stmt->execute([':key' => $key, ':value' => $value, ':value2' => $value]);
+        }
+
+        $_SESSION['flash_message'] = 'Дефолтные параметры сохранены';
+        $_SESSION['flash_type'] = 'success';
+
+        return $response->withHeader('Location', '/admin/defaults')->withStatus(302);
+    }
+
+    public function getDefaultSetting($key, $default = null)
+    {
+        $stmt = $this->pdo->prepare("SELECT setting_value FROM default_settings WHERE setting_key = :key");
+        $stmt->execute([':key' => $key]);
+        $result = $stmt->fetch();
+        return $result ? $result['setting_value'] : $default;
+    }
 }

src/Controllers/ServerController.php

@@ -57,23 +57,33 @@ class ServerController extends Model
     {
         $params = $request->getParsedBody();
 
+        // Получаем дефолтные значения
+        $stmtDefault = $this->pdo->query("SELECT setting_key, setting_value FROM default_settings");
+        $defaults = [];
+        while ($row = $stmtDefault->fetch()) {
+            $defaults[$row['setting_key']] = $row['setting_value'];
+        }
+
+        $defaultOfflineTimeout = (int)($defaults['default_offline_timeout'] ?? 300);
+
         // Генерируем уникальный токен
-        $token = bin2hex(random_bytes(16)); // 32-символьный токен
+        $token = bin2hex(random_bytes(16));
         
         $this->pdo->beginTransaction();
         
         try {
-            // Сохраняем сервер
+            // Сохраняем сервер с дефолтными значениями
             $stmt = $this->pdo->prepare("
-                INSERT INTO servers (name, address, group_id, description) 
+                INSERT INTO servers (name, address, group_id, description, offline_timeout, notify_on_offline) 
-                VALUES (:name, :address, :group_id, :description)
+                VALUES (:name, :address, :group_id, :description, :offline_timeout, 1)
             ");
 
             $result = $stmt->execute([
                 ':name' => $params['name'],
                 ':address' => $params['address'] ?? '',
                 ':group_id' => $params['group_id'] ?? null,
-                ':description' => $params['description'] ?? ''
+                ':description' => $params['description'] ?? '',
+                ':offline_timeout' => $defaultOfflineTimeout
             ]);
 
             $serverId = $this->pdo->lastInsertId();
@@ -110,7 +120,6 @@ class ServerController extends Model
         } catch (\Exception $e) {
             $this->pdo->rollback();
             
-            // TODO: Обработка ошибки
             return $response->withHeader('Location', '/servers/create')->withStatus(302);
         }
     }
@@ -153,7 +162,12 @@ class ServerController extends Model
 
         $stmt = $this->pdo->prepare("
             UPDATE servers 
-            SET name = :name, address = :address, group_id = :group_id, description = :description 
+            SET name = :name, 
+                address = :address, 
+                group_id = :group_id, 
+                description = :description,
+                offline_timeout = :offline_timeout,
+                notify_on_offline = :notify_on_offline
             WHERE id = :id
         ");
 
@@ -162,13 +176,14 @@ class ServerController extends Model
             ':name' => $params['name'],
             ':address' => $params['address'] ?? '',
             ':group_id' => $params['group_id'] ?? null,
-            ':description' => $params['description'] ?? ''
+            ':description' => $params['description'] ?? '',
+            ':offline_timeout' => (int)($params['offline_timeout'] ?? 300),
+            ':notify_on_offline' => isset($params['notify_on_offline']) ? 1 : 0
         ]);
 
         if ($result) {
             return $response->withHeader('Location', '/servers')->withStatus(302);
         } else {
-            // TODO: Обработка ошибки
             return $response->withHeader('Location', '/servers/' . $id . '/edit')->withStatus(302);
         }
     }

src/Services/NotificationService.php

@@ -62,6 +62,36 @@ class NotificationService
         $this->sendNotification($subject, $message);
     }
 
+    /**
+     * Отправить уведомление о недоступности сервера (offline)
+     */
+    public function sendOfflineNotification($serverName, $secondsSinceUpdate)
+    {
+        $minutes = round($secondsSinceUpdate / 60);
+        $subject = "🛑 Сервер недоступен: {$serverName}";
+        $message = "🖥 Сервер: {$serverName}\n";
+        $message .= "📊 Статус: OFFLINE\n";
+        $message .= "⏱️ Последние метрики: {$minutes} мин. назад\n";
+        $message .= "🕒 Время: " . date('d.m.Y H:i:s') . "\n";
+        $message .= "🔔 Требуется проверка!";
+
+        $this->sendNotification($subject, $message);
+    }
+
+    /**
+     * Отправить уведомление о восстановлении сервера (online)
+     */
+    public function sendOnlineNotification($serverName)
+    {
+        $subject = "✅ Сервер восстановлен: {$serverName}";
+        $message = "🖥 Сервер: {$serverName}\n";
+        $message .= "📊 Статус: ONLINE\n";
+        $message .= "🕒 Время: " . date('d.m.Y H:i:s') . "\n";
+        $message .= "🟢 Метрики снова поступают";
+
+        $this->sendNotification($subject, $message);
+    }
+
     /**
      * Отправить уведомление о сервисе (остановка/запуск)
      */

templates/admin/defaults.twig

@@ -0,0 +1,137 @@
+{% extends "layout.twig" %}
+
+{% block content %}
+<div class="row mb-4">
+    <div class="col-12">
+        <h2><i class="fas fa-sliders-h"></i> Дефолтные параметры</h2>
+        <p class="text-muted">Эти параметры будут использоваться по умолчанию для новых серверов и метрик</p>
+    </div>
+</div>
+
+{% if session.flash_message is defined and session.flash_message %}
+<div class="alert alert-{{ session.flash_type == 'error' ? 'danger' : 'success' }} alert-dismissible fade show">
+    {{ session.flash_message|nl2br }}
+    <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
+</div>
+{% endif %}
+
+<form method="post" action="/admin/defaults/save">
+    <input type="hidden" name="csrf_name" value="{{ csrf_name }}">
+    <input type="hidden" name="csrf_value" value="{{ csrf_value }}">
+
+    <!-- Offline настройки -->
+    <div class="row mb-4">
+        <div class="col-md-6">
+            <div class="card h-100">
+                <div class="card-header bg-dark text-white">
+                    <h5 class="mb-0"><i class="fas fa-wifi"></i> Мониторинг недоступности (Offline)</h5>
+                </div>
+                <div class="card-body">
+                    <div class="mb-3">
+                        <label for="offline_check_interval" class="form-label">
+                            <i class="fas fa-clock"></i> Интервал проверки offline
+                        </label>
+                        <div class="input-group">
+                            <input type="number" class="form-control" id="offline_check_interval" name="offline_check_interval"
+                                   value="{{ settings.offline_check_interval|default(60) }}" min="30" max="3600">
+                            <span class="input-group-text">секунд</span>
+                        </div>
+                        <div class="form-text">CRON будет проверять серверы каждые N секунд (минимум 30)</div>
+                    </div>
+
+                    <div class="mb-3">
+                        <label for="default_offline_timeout" class="form-label">
+                            <i class="fas fa-hourglass-half"></i> Дефолтный таймаут offline
+                        </label>
+                        <div class="input-group">
+                            <input type="number" class="form-control" id="default_offline_timeout" name="default_offline_timeout"
+                                   value="{{ settings.default_offline_timeout|default(300) }}" min="60" max="86400">
+                            <span class="input-group-text">секунд</span>
+                        </div>
+                        <div class="form-text">Сервер считается offline если метрики не приходили N секунд (по умолчанию 300 = 5 мин)</div>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <div class="col-md-6">
+            <div class="card h-100">
+                <div class="card-header bg-warning text-dark">
+                    <h5 class="mb-0"><i class="fas fa-chart-line"></i> Дефолтные пороги метрик</h5>
+                </div>
+                <div class="card-body">
+                    <div class="mb-3">
+                        <label for="default_warning_threshold" class="form-label">
+                            <i class="fas fa-exclamation-triangle text-warning"></i> Warning threshold
+                        </label>
+                        <div class="input-group">
+                            <input type="number" class="form-control" id="default_warning_threshold" name="default_warning_threshold"
+                                   value="{{ settings.default_warning_threshold|default(70) }}" min="0" max="100" step="0.1">
+                            <span class="input-group-text">%</span>
+                        </div>
+                        <div class="form-text">При превышении этого значения будет Warning</div>
+                    </div>
+
+                    <div class="mb-3">
+                        <label for="default_critical_threshold" class="form-label">
+                            <i class="fas fa-radiation text-danger"></i> Critical threshold
+                        </label>
+                        <div class="input-group">
+                            <input type="number" class="form-control" id="default_critical_threshold" name="default_critical_threshold"
+                                   value="{{ settings.default_critical_threshold|default(90) }}" min="0" max="100" step="0.1">
+                            <span class="input-group-text">%</span>
+                        </div>
+                        <div class="form-text">При превышении этого значения будет Critical</div>
+                    </div>
+
+                    <div class="mb-3">
+                        <label for="default_duration" class="form-label">
+                            <i class="fas fa-hourglass-start"></i> Длительность превышения
+                        </label>
+                        <div class="input-group">
+                            <input type="number" class="form-control" id="default_duration" name="default_duration"
+                                   value="{{ settings.default_duration|default(0) }}" min="0" max="60">
+                            <span class="input-group-text">минут</span>
+                        </div>
+                        <div class="form-text">Алерт отправится только если порог превышен N минут (0 = сразу)</div>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <!-- Информация о CRON -->
+    <div class="row mb-4">
+        <div class="col-12">
+            <div class="card border-primary">
+                <div class="card-header bg-primary text-white">
+                    <h5 class="mb-0"><i class="fas fa-terminal"></i> Настройка CRON</h5>
+                </div>
+                <div class="card-body">
+                    <p>Для автоматической проверки offline серверов добавьте в CRON:</p>
+                    <div class="bg-dark text-white p-3 rounded mb-3">
+                        <code>* * * * * php {{ app_path|default('/var/www/mon/public') }}/check_offline.php</code>
+                    </div>
+                    <p class="mb-0">
+                        <i class="fas fa-info-circle text-info"></i>
+                        Это запустит проверку каждую минуту. Интервал в настройках определяет как часто проверяется каждый сервер.
+                    </p>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <!-- Кнопки -->
+    <div class="row mb-4">
+        <div class="col-12">
+            <button type="submit" class="btn btn-primary">
+                <i class="fas fa-save"></i> Сохранить настройки
+            </button>
+            <a href="/admin" class="btn btn-outline-secondary">
+                <i class="fas fa-arrow-left"></i> Назад в админку
+            </a>
+        </div>
+    </div>
+</form>
+
+{% endblock %}

templates/layout.twig

@@ -52,6 +52,8 @@
                             <ul class="dropdown-menu">
                                 <li><a class="dropdown-item" href="/admin/users"><i class="fas fa-users"></i> Пользователи</a></li>
                                 <li><a class="dropdown-item" href="/admin/notifications"><i class="fas fa-bell"></i> Уведомления</a></li>
+                                <li><hr class="dropdown-divider"></li>
+                                <li><a class="dropdown-item" href="/admin/defaults"><i class="fas fa-sliders-h"></i> Дефолтные параметры</a></li>
                             </ul>
                         </li>
                         {% endif %}

templates/servers/edit.twig

@@ -38,7 +38,43 @@
                         <textarea class="form-control" id="description" name="description" rows="3">{{ server.description|default('') }}</textarea>
                         <small class="form-text text-muted">Дополнительная информация о сервере</small>
                     </div>
-                    
+
+                    <hr>
+
+                    <h5 class="mb-3"><i class="fas fa-wifi"></i> Настройки мониторинга недоступности</h5>
+
+                    <div class="row">
+                        <div class="col-md-6">
+                            <div class="mb-3">
+                                <label for="offline_timeout" class="form-label">Таймаут offline</label>
+                                <div class="input-group">
+                                    <input type="number" class="form-control" id="offline_timeout" name="offline_timeout"
+                                           value="{{ server.offline_timeout|default(300) }}" min="0" max="86400">
+                                    <span class="input-group-text">секунд</span>
+                                </div>
+                                <small class="form-text text-muted">Сервер будет считаться offline если метрики не приходили N секунд (0 = выключено)</small>
+                            </div>
+                        </div>
+                        <div class="col-md-6">
+                            <div class="mb-3">
+                                <label class="form-label">Уведомления</label>
+                                <div class="form-check form-switch mt-2">
+                                    <input class="form-check-input" type="checkbox" name="notify_on_offline" id="notify_on_offline"
+                                           value="1" {% if server.notify_on_offline|default(1) %}checked{% endif %}>
+                                    <label class="form-check-label" for="notify_on_offline">
+                                        Уведомлять при offline
+                                    </label>
+                                </div>
+                            </div>
+                        </div>
+                    </div>
+
+                    {% if server.last_offline_alert_at %}
+                    <div class="alert alert-info small">
+                        <i class="fas fa-clock"></i> Последний offline алерт: {{ server.last_offline_alert_at|date('d.m.Y H:i:s') }}
+                    </div>
+                    {% endif %}
+
                     <div class="d-grid gap-2 d-md-flex justify-content-md-end">
                         <a href="/servers" class="btn btn-secondary me-md-2">
                             <i class="fas fa-arrow-left"></i> Назад