Add archive service for automatic ZIP creation

backend/src/services/archiveService.js

@@ -0,0 +1,73 @@
+const archiver = require('archiver');
+const fs = require('fs').promises;
+const path = require('path');
+const { db } = require('../database/db');
+const logger = require('../utils/logger');
+
+const ACTIVE_PATH = path.join(__dirname, '../../../storage/events/active');
+const ARCHIVE_PATH = path.join(__dirname, '../../../storage/events/archived');
+
+async function archiveEvent(event) {
+  try {
+    const eventPath = path.join(ACTIVE_PATH, event.slug);
+    const archiveName = `${event.slug}.zip`;
+    const archivePath = path.join(ARCHIVE_PATH, archiveName);
+    
+    // Ensure archive directory exists
+    await fs.mkdir(ARCHIVE_PATH, { recursive: true });
+    
+    // Create archive
+    const output = require('fs').createWriteStream(archivePath);
+    const archive = archiver('zip', {
+      zlib: { level: 9 } // Maximum compression
+    });
+    
+    archive.on('error', (err) => {
+      throw err;
+    });
+    
+    output.on('close', async () => {
+      logger.info(`Archive created: ${archiveName} (${archive.pointer()} bytes)`);
+      
+      // Update database
+      await db('events').where('id', event.id).update({
+        is_archived: true,
+        archive_path: path.relative(path.join(__dirname, '../../../storage'), archivePath),
+        archived_at: new Date()
+      });
+      
+      // Delete original files
+      await fs.rm(eventPath, { recursive: true });
+      
+      // Delete thumbnails
+      const photos = await db('photos').where('event_id', event.id);
+      for (const photo of photos) {
+        if (photo.thumbnail_path) {
+          const thumbPath = path.join(__dirname, '../../../storage', photo.thumbnail_path);
+          await fs.unlink(thumbPath).catch(() => {}); // Ignore if already deleted
+        }
+      }
+      
+      // Queue completion email
+      await db('email_queue').insert({
+        event_id: event.id,
+        recipient_email: event.admin_email,
+        email_type: 'archive_complete',
+        email_data: JSON.stringify({
+          event_name: event.event_name,
+          archive_size: archive.pointer()
+        })
+      });
+    });
+    
+    archive.pipe(output);
+    archive.directory(eventPath, false);
+    await archive.finalize();
+    
+  } catch (error) {
+    logger.error(`Error archiving event ${event.slug}:`, error);
+    throw error;
+  }
+}
+
+module.exports = { archiveEvent };