aggragation for pagination and filters

server/controllers/GPS.InstalledDevice.js

@@ -188,53 +188,102 @@ module.exports.getAllForAdmin = async (req, res) => {
     const rows = parseInt(req.query.rows) || 10
     const skip = (page - 1) * rows
 
-    // Build status filter
-    const filter = {}
+    const match = {}
+
     if (filterType !== 'all') {
-      let statusValue
-      if (filterType === 'rej') statusValue = 2
-      else if (filterType === 'accept') statusValue = 1
-      else if (filterType === 'pend') statusValue = 0
-      
-      if (statusValue !== undefined) {
-        filter.status = statusValue
+      const map = { pend: 0, accept: 1, rej: 2 }
+      if (map[filterType] !== undefined) {
+        match.status = map[filterType]
       }
     }
 
-    // Fetch data with status filter (search will be done after populate)
-    let data = await InstalledDevice.find(filter)
-      .sort({ created_at: -1 })
-      .populate('deviceId')
-      .populate('userId', 'shopName national_code first_name last_name mobile_number city_name province_name')
-
-    // Filter by IMEI and deviceId.model if search is provided (needs to be done after populate)
     if (search) {
-      const searchLower = search.toLowerCase()
-      data = data.filter(item => {
-        const imeiMatch = item.IMEI && item.IMEI.toLowerCase().includes(searchLower)
-        const modelMatch = item.deviceId && item.deviceId.model && item.deviceId.model.toLowerCase().includes(searchLower)
-        return imeiMatch || modelMatch
-      })
+      match.$or = [
+        { IMEI: { $regex: search, $options: 'i' } }
+      ]
     }
 
-    // Calculate pagination
-    const totalDocuments = data.length
+    const pipeline = [
+      { $match: match },
+
+      {
+        $lookup: {
+          from: 'devices',
+          localField: 'deviceId',
+          foreignField: '_id',
+          as: 'deviceId'
+        }
+      },
+      { $unwind: { path: '$deviceId', preserveNullAndEmptyArrays: true } },
+
+      ...(search
+        ? [{
+            $match: {
+              $or: [
+                { 'deviceId.model': { $regex: search, $options: 'i' } },
+                { IMEI: { $regex: search, $options: 'i' } }
+              ]
+            }
+          }]
+        : []),
+
+      {
+        $lookup: {
+          from: 'usergps',
+          let: { userIdStr: '$userId' },
+          pipeline: [
+            {
+              $match: {
+                $expr: {
+                  $and: [
+                    { $ne: ['$$userIdStr', null] },
+                    { $ne: ['$$userIdStr', ''] },
+                    {
+                      $eq: [
+                        '$_id',
+                        {
+                          $convert: {
+                            input: '$$userIdStr',
+                            to: 'objectId',
+                            onError: null,
+                            onNull: null
+                          }
+                        }
+                      ]
+                    }
+                  ]
+                }
+              }
+            }
+          ],
+          as: 'userId'
+        }
+      },
+      { $unwind: { path: '$userId', preserveNullAndEmptyArrays: true } },
+
+      { $sort: { created_at: -1 } },
+
+      {
+        $facet: {
+          data: [{ $skip: skip }, { $limit: rows }],
+          totalCount: [{ $count: 'count' }]
+        }
+      }
+    ]
+
+    const result = await InstalledDevice.aggregate(pipeline)
+
+    const data = result[0].data
+    const totalDocuments = result[0].totalCount[0]?.count || 0
     const totalPages = Math.ceil(totalDocuments / rows)
 
-    // Apply pagination
-    const paginatedData = data.slice(skip, skip + rows)
-
-    res.status(200).json({ 
-      data: paginatedData, 
-      totalDocuments, 
-      totalPages 
-    })
+    res.status(200).json({ data, totalDocuments, totalPages })
   } catch (error) {
-    console.error('Error:', error.message)
     res.status(500).json({ message: 'Server Error', error: error.message })
   }
 }
 
+
 module.exports.updateInstalled = [
   [
     param('id').notEmpty().isMongoId().withMessage('لطفا ایدی را وارد یا تصحیح کنید'),