Add chat page and chat server

inventory-server/chat/routes.js

@@ -0,0 +1,87 @@
+const express = require('express');
+const router = express.Router();
+
+// Get all active users for the "view as" dropdown
+router.get('/users', async (req, res) => {
+  try {
+    const result = await global.pool.query(`
+      SELECT id, username, name, type, active
+      FROM users 
+      WHERE active = true AND type = 'user'
+      ORDER BY name ASC
+    `);
+    
+    res.json({
+      status: 'success',
+      users: result.rows
+    });
+  } catch (error) {
+    console.error('Error fetching users:', error);
+    res.status(500).json({ 
+      status: 'error',
+      error: 'Failed to fetch users',
+      details: error.message
+    });
+  }
+});
+
+// Get rooms for a specific user
+router.get('/users/:userId/rooms', async (req, res) => {
+  const { userId } = req.params;
+  
+  try {
+    // Get rooms where the user is a member
+    const result = await global.pool.query(`
+      SELECT DISTINCT r.id, r.name, r.fname, r.t as type, r.msgs, r.lm as last_message_date
+      FROM room r, subscription s
+      WHERE s.rid = r.mongo_id 
+      AND s.u->>'_id' = (SELECT mongo_id FROM users WHERE id = $1)
+      AND r.archived IS NOT TRUE
+      ORDER BY r.lm DESC NULLS LAST
+      LIMIT 50
+    `, [userId]);
+    
+    res.json({
+      status: 'success',
+      rooms: result.rows
+    });
+  } catch (error) {
+    console.error('Error fetching user rooms:', error);
+    res.status(500).json({ 
+      status: 'error',
+      error: 'Failed to fetch user rooms',
+      details: error.message
+    });
+  }
+});
+
+// Get messages for a specific room
+router.get('/rooms/:roomId/messages', async (req, res) => {
+  const { roomId } = req.params;
+  const { limit = 50, offset = 0 } = req.query;
+  
+  try {
+    const result = await global.pool.query(`
+      SELECT m.id, m.msg, m.ts, m.u, m._updatedat
+      FROM message m
+      JOIN room r ON m.rid = r.mongo_id
+      WHERE r.id = $1
+      ORDER BY m.ts DESC
+      LIMIT $2 OFFSET $3
+    `, [roomId, limit, offset]);
+    
+    res.json({
+      status: 'success',
+      messages: result.rows
+    });
+  } catch (error) {
+    console.error('Error fetching messages:', error);
+    res.status(500).json({ 
+      status: 'error',
+      error: 'Failed to fetch messages',
+      details: error.message
+    });
+  }
+});
+
+module.exports = router;