Add calender support in server

2025-07-18 11:49:16 +02:00
parent 88d47dc4e0
commit 53e2b15351
7 changed files with 726 additions and 19 deletions
--- a/server/index.js
+++ b/server/index.js
@@ -4,6 +4,7 @@ require('dotenv').config();

 const { sequelize, cleanupCheckedItems } = require('./models');
 const shoppingRoutes = require('./routes/shopping');
+const calendarRoutes = require('./routes/calendar');

 const app = express();
 const PORT = process.env.PORT || 3001;
@@ -15,13 +16,15 @@ app.use(express.urlencoded({ extended: true }));

 // Routes
 app.use('/api/shopping', shoppingRoutes);
+app.use('/api/calendar', calendarRoutes);

 // Health check endpoint
 app.get('/api/health', (req, res) => {
  res.json({ 
    status: 'OK', 
-    message: 'Shopping List Server is running',
-    timestamp: new Date().toISOString()
+    message: 'OpenWall Server is running',
+    timestamp: new Date().toISOString(),
+    features: ['shopping', 'calendar']
  });
 });

@@ -52,9 +55,10 @@ const startServer = async () => {
    
    // Start the server
    app.listen(PORT, () => {
-      console.log(`Shopping List Server is running on port ${PORT}`);
+      console.log(`OpenWall Server is running on port ${PORT}`);
      console.log(`Health check available at: http://localhost:${PORT}/api/health`);
      console.log(`Shopping API available at: http://localhost:${PORT}/api/shopping`);
+      console.log(`Calendar API available at: http://localhost:${PORT}/api/calendar`);
    });
  } catch (error) {
    console.error('Unable to start server:', error);
--- a/server/models/CalendarUser.js
+++ b/server/models/CalendarUser.js
@@ -0,0 +1,41 @@
+const { DataTypes } = require('sequelize');
+
+module.exports = (sequelize) => {
+  const CalendarUser = sequelize.define('CalendarUser', {
+    id: {
+      type: DataTypes.INTEGER,
+      primaryKey: true,
+      autoIncrement: true
+    },
+    name: {
+      type: DataTypes.STRING,
+      allowNull: false,
+      unique: true
+    },
+    nextcloudUrl: {
+      type: DataTypes.STRING,
+      allowNull: false
+    },
+    username: {
+      type: DataTypes.STRING,
+      allowNull: false
+    },
+    password: {
+      type: DataTypes.STRING,
+      allowNull: false
+    },
+    calendarName: {
+      type: DataTypes.STRING,
+      allowNull: true // Will default to personal calendar if not specified
+    },
+    isActive: {
+      type: DataTypes.BOOLEAN,
+      defaultValue: true
+    }
+  }, {
+    tableName: 'calendar_users',
+    timestamps: true
+  });
+
+  return CalendarUser;
+};
--- a/server/models/index.js
+++ b/server/models/index.js
@@ -4,39 +4,41 @@ const path = require('path');
 // Initialize Sequelize with SQLite
 const sequelize = new Sequelize({
  dialect: 'sqlite',
-  storage: path.join(__dirname, '../database.sqlite'),
-  logging: false, // Set to console.log to see SQL queries
+  storage: path.join(__dirname, '..', 'database.sqlite'),
+  logging: process.env.NODE_ENV === 'development' ? console.log : false
 });

-// Import models
-const ShoppingItem = require('./ShoppingItem')(sequelize);
+// Import and initialize models
+const createShoppingItem = require('./ShoppingItem');
+const createCalendarUser = require('./CalendarUser');

-// Function to clean up checked items older than 2 hours
+const ShoppingItem = createShoppingItem(sequelize);
+const CalendarUser = createCalendarUser(sequelize);
+
+// Function to clean up checked shopping items older than 24 hours
 const cleanupCheckedItems = async () => {
  try {
-    const twoHoursAgo = new Date(Date.now() - 2 * 60 * 60 * 1000);
+    const oneDayAgo = new Date(Date.now() - 24 * 60 * 60 * 1000);
    const deletedCount = await ShoppingItem.destroy({
      where: {
        checked: true,
-        checkedAt: {
-          [Sequelize.Op.lt]: twoHoursAgo,
-        },
-      },
+        updatedAt: {
+          [Sequelize.Op.lt]: oneDayAgo
+        }
+      }
    });
    
    if (deletedCount > 0) {
-      console.log(`Cleaned up ${deletedCount} checked items older than 2 hours`);
+      console.log(`Cleaned up ${deletedCount} checked shopping items older than 24 hours`);
    }
  } catch (error) {
-    console.error('Error cleaning up checked items:', error);
+    console.error('Error during cleanup:', error);
  }
 };

-// Run cleanup every 30 minutes
-setInterval(cleanupCheckedItems, 30 * 60 * 1000);
-
 module.exports = {
  sequelize,
  ShoppingItem,
-  cleanupCheckedItems,
+  CalendarUser,
+  cleanupCheckedItems
 };
--- a/server/package-lock.json
+++ b/server/package-lock.json
@@ -9,6 +9,7 @@
      "version": "1.0.0",
      "license": "ISC",
      "dependencies": {
+        "@nextcloud/cdav-library": "^1.1.0",
        "cors": "^2.8.5",
        "dotenv": "^17.2.0",
        "express": "^5.1.0",
@@ -26,6 +27,19 @@
      "license": "MIT",
      "optional": true
    },
+    "node_modules/@nextcloud/cdav-library": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@nextcloud/cdav-library/-/cdav-library-1.1.0.tgz",
+      "integrity": "sha512-hmJgR9Cp11y3ch4dS0NufsPgofe4+iwhUkusYKmDTl0PFsJrBUNy1zawLdfDrpEjK1zXrU3tOpyF3pIqyGMYBg==",
+      "license": "AGPL-3.0",
+      "dependencies": {
+        "core-js": "^3.19.3",
+        "regenerator-runtime": "^0.13.9"
+      },
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
    "node_modules/@npmcli/fs": {
      "version": "1.1.1",
      "resolved": "https://registry.npmjs.org/@npmcli/fs/-/fs-1.1.1.tgz",
@@ -501,6 +515,17 @@
        "node": ">=6.6.0"
      }
    },
+    "node_modules/core-js": {
+      "version": "3.44.0",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.44.0.tgz",
+      "integrity": "sha512-aFCtd4l6GvAXwVEh3XbbVqJGHDJt0OZRa+5ePGx3LLwi12WfexqQxcsohb2wgsa/92xtl19Hd66G/L+TaAxDMw==",
+      "hasInstallScript": true,
+      "license": "MIT",
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/core-js"
+      }
+    },
    "node_modules/cors": {
      "version": "2.8.5",
      "resolved": "https://registry.npmjs.org/cors/-/cors-2.8.5.tgz",
@@ -1979,6 +2004,12 @@
        "node": ">=8.10.0"
      }
    },
+    "node_modules/regenerator-runtime": {
+      "version": "0.13.11",
+      "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.13.11.tgz",
+      "integrity": "sha512-kY1AZVr2Ra+t+piVaJ4gxaFaReZVH40AKNo7UCX6W+dEwBo/2oZJzqfuN1qLq1oL45o56cPaTXELwrTh8Fpggg==",
+      "license": "MIT"
+    },
    "node_modules/retry": {
      "version": "0.12.0",
      "resolved": "https://registry.npmjs.org/retry/-/retry-0.12.0.tgz",
--- a/server/package.json
+++ b/server/package.json
@@ -13,6 +13,7 @@
  "license": "ISC",
  "packageManager": "pnpm@10.13.1",
  "dependencies": {
+    "@nextcloud/cdav-library": "^1.1.0",
    "cors": "^2.8.5",
    "dotenv": "^17.2.0",
    "express": "^5.1.0",
--- a/server/routes/calendar.js
+++ b/server/routes/calendar.js
@@ -0,0 +1,323 @@
+const express = require('express');
+const router = express.Router();
+const { CalendarUser } = require('../models');
+const CalendarService = require('../services/CalendarService');
+
+// Get all calendar users
+router.get('/users', async (req, res) => {
+  try {
+    const users = await CalendarUser.findAll({
+      where: { isActive: true },
+      attributes: ['id', 'name', 'nextcloudUrl', 'username', 'calendarName', 'isActive']
+    });
+    res.json(users);
+  } catch (error) {
+    console.error('Error fetching calendar users:', error);
+    res.status(500).json({ error: 'Failed to fetch calendar users' });
+  }
+});
+
+// Add a new calendar user
+router.post('/users', async (req, res) => {
+  try {
+    const { name, nextcloudUrl, username, password, calendarName } = req.body;
+    
+    if (!name || !nextcloudUrl || !username || !password) {
+      return res.status(400).json({ 
+        error: 'Missing required fields: name, nextcloudUrl, username, password' 
+      });
+    }
+
+    // Test connection before saving
+    const testConfig = { name, nextcloudUrl, username, password, calendarName };
+    const connectionTest = await CalendarService.testConnection(testConfig);
+    
+    if (!connectionTest) {
+      return res.status(400).json({ 
+        error: 'Failed to connect to Nextcloud instance. Please check your credentials.' 
+      });
+    }
+
+    const user = await CalendarUser.create({
+      name,
+      nextcloudUrl,
+      username,
+      password,
+      calendarName
+    });
+
+    // Return user without password
+    const { password: _, ...userWithoutPassword } = user.toJSON();
+    res.status(201).json(userWithoutPassword);
+  } catch (error) {
+    console.error('Error creating calendar user:', error);
+    if (error.name === 'SequelizeUniqueConstraintError') {
+      res.status(400).json({ error: 'User name already exists' });
+    } else {
+      res.status(500).json({ error: 'Failed to create calendar user' });
+    }
+  }
+});
+
+// Update a calendar user
+router.put('/users/:id', async (req, res) => {
+  try {
+    const { id } = req.params;
+    const { name, nextcloudUrl, username, password, calendarName, isActive } = req.body;
+    
+    const user = await CalendarUser.findByPk(id);
+    if (!user) {
+      return res.status(404).json({ error: 'Calendar user not found' });
+    }
+
+    // Test connection if credentials are being updated
+    if (nextcloudUrl || username || password) {
+      const testConfig = {
+        name: name || user.name,
+        nextcloudUrl: nextcloudUrl || user.nextcloudUrl,
+        username: username || user.username,
+        password: password || user.password,
+        calendarName: calendarName || user.calendarName
+      };
+      
+      const connectionTest = await CalendarService.testConnection(testConfig);
+      if (!connectionTest) {
+        return res.status(400).json({ 
+          error: 'Failed to connect to Nextcloud instance. Please check your credentials.' 
+        });
+      }
+    }
+
+    await user.update({
+      ...(name && { name }),
+      ...(nextcloudUrl && { nextcloudUrl }),
+      ...(username && { username }),
+      ...(password && { password }),
+      ...(calendarName !== undefined && { calendarName }),
+      ...(isActive !== undefined && { isActive })
+    });
+
+    // Return user without password
+    const { password: _, ...userWithoutPassword } = user.toJSON();
+    res.json(userWithoutPassword);
+  } catch (error) {
+    console.error('Error updating calendar user:', error);
+    res.status(500).json({ error: 'Failed to update calendar user' });
+  }
+});
+
+// Delete a calendar user
+router.delete('/users/:id', async (req, res) => {
+  try {
+    const { id } = req.params;
+    
+    const user = await CalendarUser.findByPk(id);
+    if (!user) {
+      return res.status(404).json({ error: 'Calendar user not found' });
+    }
+
+    await user.destroy();
+    res.json({ message: 'Calendar user deleted successfully' });
+  } catch (error) {
+    console.error('Error deleting calendar user:', error);
+    res.status(500).json({ error: 'Failed to delete calendar user' });
+  }
+});
+
+// Get calendar events for a specific month
+// GET /api/calendar/events/:year/:month?user=username&type=family|individual
+router.get('/events/:year/:month', async (req, res) => {
+  try {
+    const { year, month } = req.params;
+    const { user, type } = req.query;
+
+    // Validate year and month
+    if (!year || !month || !/^\d{4}$/.test(year) || !/^(0[1-9]|1[0-2])$/.test(month)) {
+      return res.status(400).json({ 
+        error: 'Invalid year or month format. Use YYYY for year and MM for month.' 
+      });
+    }
+
+    if (type === 'family') {
+      // Get events from all active users
+      const users = await CalendarUser.findAll({ 
+        where: { isActive: true },
+        attributes: ['name', 'nextcloudUrl', 'username', 'password', 'calendarName']
+      });
+
+      if (users.length === 0) {
+        return res.json([]);
+      }
+
+      const events = await CalendarService.getFamilyEventsForMonth(users, year, month);
+      res.json(events);
+    } else {
+      // Get events for a specific user
+      if (!user) {
+        return res.status(400).json({ 
+          error: 'User parameter required for individual calendar view' 
+        });
+      }
+
+      const userConfig = await CalendarUser.findOne({ 
+        where: { name: user, isActive: true },
+        attributes: ['name', 'nextcloudUrl', 'username', 'password', 'calendarName']
+      });
+
+      if (!userConfig) {
+        return res.status(404).json({ error: 'User not found or inactive' });
+      }
+
+      const events = await CalendarService.getEventsForMonth(userConfig, year, month);
+      res.json(events);
+    }
+  } catch (error) {
+    console.error('Error retrieving calendar events:', error);
+    res.status(500).json({ error: 'Failed to retrieve calendar events' });
+  }
+});
+
+// Create a new calendar event
+// POST /api/calendar/events
+router.post('/events', async (req, res) => {
+  try {
+    const { user, date, text } = req.body;
+
+    if (!user || !date || !text) {
+      return res.status(400).json({ 
+        error: 'Missing required fields: user, date, text' 
+      });
+    }
+
+    // Validate date format (YYYY-MM-DD)
+    if (!/^\d{4}-\d{2}-\d{2}$/.test(date)) {
+      return res.status(400).json({ 
+        error: 'Invalid date format. Use YYYY-MM-DD.' 
+      });
+    }
+
+    const userConfig = await CalendarUser.findOne({ 
+      where: { name: user, isActive: true },
+      attributes: ['name', 'nextcloudUrl', 'username', 'password', 'calendarName']
+    });
+
+    if (!userConfig) {
+      return res.status(404).json({ error: 'User not found or inactive' });
+    }
+
+    const event = await CalendarService.createEvent(userConfig, date, text);
+    res.status(201).json(event);
+  } catch (error) {
+    console.error('Error creating calendar event:', error);
+    res.status(500).json({ error: 'Failed to create calendar event' });
+  }
+});
+
+// Update a calendar event
+// PUT /api/calendar/events/:eventId
+router.put('/events/:eventId', async (req, res) => {
+  try {
+    const { eventId } = req.params;
+    const { user, date, text } = req.body;
+
+    if (!user || !date || !text) {
+      return res.status(400).json({ 
+        error: 'Missing required fields: user, date, text' 
+      });
+    }
+
+    // Validate date format (YYYY-MM-DD)
+    if (!/^\d{4}-\d{2}-\d{2}$/.test(date)) {
+      return res.status(400).json({ 
+        error: 'Invalid date format. Use YYYY-MM-DD.' 
+      });
+    }
+
+    const userConfig = await CalendarUser.findOne({ 
+      where: { name: user, isActive: true },
+      attributes: ['name', 'nextcloudUrl', 'username', 'password', 'calendarName']
+    });
+
+    if (!userConfig) {
+      return res.status(404).json({ error: 'User not found or inactive' });
+    }
+
+    const event = await CalendarService.updateEvent(userConfig, eventId, date, text);
+    res.json(event);
+  } catch (error) {
+    console.error('Error updating calendar event:', error);
+    if (error.message === 'Event not found') {
+      res.status(404).json({ error: 'Event not found' });
+    } else if (error.message.includes('Permission denied')) {
+      res.status(403).json({ error: error.message });
+    } else {
+      res.status(500).json({ error: 'Failed to update calendar event' });
+    }
+  }
+});
+
+// Delete a calendar event
+// DELETE /api/calendar/events/:eventId
+router.delete('/events/:eventId', async (req, res) => {
+  try {
+    const { eventId } = req.params;
+    const { user } = req.body;
+
+    if (!user) {
+      return res.status(400).json({ 
+        error: 'Missing required field: user' 
+      });
+    }
+
+    const userConfig = await CalendarUser.findOne({ 
+      where: { name: user, isActive: true },
+      attributes: ['name', 'nextcloudUrl', 'username', 'password', 'calendarName']
+    });
+
+    if (!userConfig) {
+      return res.status(404).json({ error: 'User not found or inactive' });
+    }
+
+    await CalendarService.deleteEvent(userConfig, eventId);
+    res.json({ message: 'Event deleted successfully' });
+  } catch (error) {
+    console.error('Error deleting calendar event:', error);
+    if (error.message === 'Event not found') {
+      res.status(404).json({ error: 'Event not found' });
+    } else if (error.message.includes('Permission denied')) {
+      res.status(403).json({ error: error.message });
+    } else {
+      res.status(500).json({ error: 'Failed to delete calendar event' });
+    }
+  }
+});
+
+// Test Nextcloud connection for a user
+router.post('/users/:id/test-connection', async (req, res) => {
+  try {
+    const { id } = req.params;
+    
+    const user = await CalendarUser.findByPk(id);
+    if (!user) {
+      return res.status(404).json({ error: 'Calendar user not found' });
+    }
+
+    const connectionTest = await CalendarService.testConnection({
+      name: user.name,
+      nextcloudUrl: user.nextcloudUrl,
+      username: user.username,
+      password: user.password,
+      calendarName: user.calendarName
+    });
+
+    res.json({ 
+      success: connectionTest,
+      message: connectionTest ? 'Connection successful' : 'Connection failed'
+    });
+  } catch (error) {
+    console.error('Error testing connection:', error);
+    res.status(500).json({ error: 'Failed to test connection' });
+  }
+});
+
+module.exports = router;
--- a/server/services/CalendarService.js
+++ b/server/services/CalendarService.js
@@ -0,0 +1,305 @@
+// Calendar Service for Nextcloud CalDAV integration
+// This is a basic implementation that can be enhanced with the @nextcloud/cdav-library
+const crypto = require('crypto');
+const https = require('https');
+const http = require('http');
+const { URL } = require('url');
+
+class CalendarService {
+  constructor() {
+    this.events = new Map(); // In-memory storage for demo purposes
+    // TODO: Replace with actual CalDAV operations when library is available
+  }
+
+  /**
+   * Create a calendar event
+   * @param {Object} userConfig - Nextcloud user configuration
+   * @param {string} date - Date in YYYY-MM-DD format
+   * @param {string} text - Event description
+   * @returns {Promise<Object>} Created event
+   */
+  async createEvent(userConfig, date, text) {
+    try {
+      // TODO: Implement actual CalDAV event creation
+      // For now, simulate the operation with local storage
+      
+      const eventId = crypto.randomUUID();
+      const event = {
+        id: eventId,
+        date: date,
+        text: text,
+        user: userConfig.name,
+        summary: text,
+        dtstart: this._formatDateForCalDAV(date),
+        dtend: this._formatDateForCalDAV(date),
+        createdAt: new Date().toISOString(),
+        updatedAt: new Date().toISOString()
+      };
+
+      this.events.set(eventId, event);
+      
+      console.log(`Calendar event created for ${userConfig.name}: ${text} on ${date}`);
+      
+      // TODO: When CalDAV library is available, replace with:
+      // const caldavEvent = await this._createCalDAVEvent(userConfig, event);
+      
+      return event;
+    } catch (error) {
+      console.error('Error creating calendar event:', error);
+      throw new Error('Failed to create calendar event');
+    }
+  }
+
+  /**
+   * Get calendar events for a specific month
+   * @param {Object} userConfig - Nextcloud user configuration
+   * @param {string} year - Year (YYYY)
+   * @param {string} month - Month (MM)
+   * @returns {Promise<Array>} Array of events
+   */
+  async getEventsForMonth(userConfig, year, month) {
+    try {
+      // TODO: Implement actual CalDAV event retrieval
+      // For now, filter local events
+      
+      const events = Array.from(this.events.values());
+      const filteredEvents = events.filter(event => {
+        if (event.user !== userConfig.name) return false;
+        const eventDate = new Date(event.date);
+        return eventDate.getFullYear() === parseInt(year) && 
+               (eventDate.getMonth() + 1) === parseInt(month);
+      });
+
+      console.log(`Retrieved ${filteredEvents.length} events for ${userConfig.name} in ${year}-${month}`);
+      
+      // TODO: When CalDAV library is available, replace with:
+      // const caldavEvents = await this._fetchCalDAVEvents(userConfig, year, month);
+      
+      return filteredEvents;
+    } catch (error) {
+      console.error('Error retrieving calendar events:', error);
+      throw new Error('Failed to retrieve calendar events');
+    }
+  }
+
+  /**
+   * Get calendar events for all users (family view)
+   * @param {Array} userConfigs - Array of user configurations
+   * @param {string} year - Year (YYYY)
+   * @param {string} month - Month (MM)
+   * @returns {Promise<Array>} Array of events from all users
+   */
+  async getFamilyEventsForMonth(userConfigs, year, month) {
+    try {
+      const allEvents = [];
+      
+      for (const userConfig of userConfigs) {
+        const userEvents = await this.getEventsForMonth(userConfig, year, month);
+        allEvents.push(...userEvents);
+      }
+
+      // Sort events by date
+      allEvents.sort((a, b) => new Date(a.date) - new Date(b.date));
+      
+      console.log(`Retrieved ${allEvents.length} family events for ${year}-${month}`);
+      return allEvents;
+    } catch (error) {
+      console.error('Error retrieving family calendar events:', error);
+      throw new Error('Failed to retrieve family calendar events');
+    }
+  }
+
+  /**
+   * Update a calendar event
+   * @param {Object} userConfig - Nextcloud user configuration
+   * @param {string} eventId - Event ID
+   * @param {string} date - New date
+   * @param {string} text - New text
+   * @returns {Promise<Object>} Updated event
+   */
+  async updateEvent(userConfig, eventId, date, text) {
+    try {
+      const event = this.events.get(eventId);
+      if (!event) {
+        throw new Error('Event not found');
+      }
+
+      if (event.user !== userConfig.name) {
+        throw new Error('Permission denied: You can only edit your own events');
+      }
+
+      event.date = date;
+      event.text = text;
+      event.summary = text;
+      event.dtstart = this._formatDateForCalDAV(date);
+      event.dtend = this._formatDateForCalDAV(date);
+      event.updatedAt = new Date().toISOString();
+
+      this.events.set(eventId, event);
+      
+      console.log(`Calendar event updated for ${userConfig.name}: ${eventId}`);
+      
+      // TODO: When CalDAV library is available, replace with:
+      // await this._updateCalDAVEvent(userConfig, event);
+      
+      return event;
+    } catch (error) {
+      console.error('Error updating calendar event:', error);
+      throw error;
+    }
+  }
+
+  /**
+   * Delete a calendar event
+   * @param {Object} userConfig - Nextcloud user configuration
+   * @param {string} eventId - Event ID
+   * @returns {Promise<boolean>} Success status
+   */
+  async deleteEvent(userConfig, eventId) {
+    try {
+      const event = this.events.get(eventId);
+      if (!event) {
+        throw new Error('Event not found');
+      }
+
+      if (event.user !== userConfig.name) {
+        throw new Error('Permission denied: You can only delete your own events');
+      }
+
+      this.events.delete(eventId);
+      
+      console.log(`Calendar event deleted for ${userConfig.name}: ${eventId}`);
+      
+      // TODO: When CalDAV library is available, replace with:
+      // await this._deleteCalDAVEvent(userConfig, eventId);
+      
+      return true;
+    } catch (error) {
+      console.error('Error deleting calendar event:', error);
+      throw error;
+    }
+  }
+
+  /**
+   * Test connection to Nextcloud instance
+   * @param {Object} userConfig - Nextcloud user configuration
+   * @returns {Promise<boolean>} Connection status
+   */
+  async testConnection(userConfig) {
+    try {
+      // Basic HTTP test to verify Nextcloud instance is reachable
+      const url = new URL(userConfig.nextcloudUrl);
+      const options = {
+        hostname: url.hostname,
+        port: url.port || (url.protocol === 'https:' ? 443 : 80),
+        path: '/status.php',
+        method: 'GET',
+        timeout: 5000,
+        headers: {
+          'User-Agent': 'OpenWall/1.0'
+        }
+      };
+
+      const protocol = url.protocol === 'https:' ? https : http;
+      
+      return new Promise((resolve) => {
+        const req = protocol.request(options, (res) => {
+          let data = '';
+          res.on('data', chunk => data += chunk);
+          res.on('end', () => {
+            try {
+              const status = JSON.parse(data);
+              const isNextcloud = status.productname && status.productname.toLowerCase().includes('nextcloud');
+              console.log(`Connection test for ${userConfig.name}: ${isNextcloud ? 'SUCCESS' : 'NOT_NEXTCLOUD'}`);
+              resolve(isNextcloud);
+            } catch (e) {
+              console.log(`Connection test for ${userConfig.name}: INVALID_RESPONSE`);
+              resolve(false);
+            }
+          });
+        });
+
+        req.on('error', (error) => {
+          console.log(`Connection test for ${userConfig.name}: ERROR - ${error.message}`);
+          resolve(false);
+        });
+
+        req.on('timeout', () => {
+          console.log(`Connection test for ${userConfig.name}: TIMEOUT`);
+          req.destroy();
+          resolve(false);
+        });
+
+        req.end();
+      });
+    } catch (error) {
+      console.error('Error testing connection:', error);
+      return false;
+    }
+  }
+
+  /**
+   * Format date for CalDAV (YYYYMMDD format for all-day events)
+   * @private
+   */
+  _formatDateForCalDAV(dateString) {
+    const date = new Date(dateString);
+    return date.toISOString().slice(0, 10).replace(/-/g, '');
+  }
+
+  // TODO: Implement these methods when @nextcloud/cdav-library is available
+  /*
+  async _createCalDAVEvent(userConfig, event) {
+    const { createClient } = require('@nextcloud/cdav-library');
+    const client = createClient({
+      url: userConfig.nextcloudUrl,
+      username: userConfig.username,
+      password: userConfig.password
+    });
+    
+    // Create ICS event content
+    const icsContent = this._generateICSEvent(event);
+    
+    // Create event on Nextcloud
+    const result = await client.createEvent(icsContent);
+    return result;
+  }
+
+  async _fetchCalDAVEvents(userConfig, year, month) {
+    const { createClient } = require('@nextcloud/cdav-library');
+    const client = createClient({
+      url: userConfig.nextcloudUrl,
+      username: userConfig.username,
+      password: userConfig.password
+    });
+    
+    const startDate = new Date(year, month - 1, 1);
+    const endDate = new Date(year, month, 0);
+    
+    const events = await client.fetchCalendarEvents({
+      start: startDate,
+      end: endDate
+    });
+    
+    return events;
+  }
+
+  _generateICSEvent(event) {
+    return `BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:-//OpenWall//Calendar//EN
+BEGIN:VEVENT
+UID:${event.id}
+DTSTART;VALUE=DATE:${event.dtstart}
+DTEND;VALUE=DATE:${event.dtend}
+SUMMARY:${event.summary}
+DESCRIPTION:${event.text}
+CREATED:${new Date(event.createdAt).toISOString().replace(/[-:]/g, '').split('.')[0]}Z
+LAST-MODIFIED:${new Date(event.updatedAt).toISOString().replace(/[-:]/g, '').split('.')[0]}Z
+END:VEVENT
+END:VCALENDAR`;
+  }
+  */
+}
+
+module.exports = new CalendarService();