feat: complete deployment codebase for BackOne DPI dashboard with dynamic telemetry, rebranding, database size tracking, and modular design

backend/routes/dashboard/helpers.js

@@ -0,0 +1,67 @@
+const { CustomDeviceLabel, Flow } = require('../../models/Schemas');
+
+function getTimeFilter(req) {
+  const range = req.query.timeRange || '1d';
+  if (range === 'all') return null;
+  const now = new Date();
+  const ms = {
+    '5m':  5    * 60000,
+    '30m': 30   * 60000,
+    '1h':  60   * 60000,
+    '1d':  24   * 3600000,
+    '7d':  7    * 24 * 3600000,
+  };
+  const delta = ms[range] ?? ms['1d'];
+  return { $gte: new Date(now.getTime() - delta) };
+}
+
+function getBaseFilter(req, timeFilter = null) {
+  const filter = {};
+  if (timeFilter) filter.timestamp = timeFilter;
+  if (req.user?.site_uuid)  filter.site_uuid  = req.user.site_uuid;
+  if (req.user?.role === 'AGENT_VIEWER' && req.user?.agent_uuid) {
+    filter.agent_uuid = req.user.agent_uuid;
+  } else if (req.query?.agent_uuid) {
+    filter.agent_uuid = req.query.agent_uuid;
+  }
+  return filter;
+}
+
+async function getCustomLabelsMap() {
+  try {
+    const list = await CustomDeviceLabel.find().lean();
+    const map = {};
+    list.forEach(c => {
+      map[c.mac_address] = c.device_label;
+    });
+    return map;
+  } catch (err) {
+    console.error('[getCustomLabelsMap] failed:', err.message);
+    return {};
+  }
+}
+
+async function topFlowField(fieldName, req, limit = 20) {
+  const timeFilter = getTimeFilter(req);
+  const matchBase  = getBaseFilter(req, timeFilter);
+
+  return Flow.aggregate([
+    { $match: { ...matchBase, [fieldName]: { $ne: null, $ne: '' } } },
+    { $group: {
+        _id:      `$${fieldName}`,
+        download: { $sum: '$download' },
+        upload:   { $sum: '$upload' },
+        count:    { $sum: 1 },
+    }},
+    { $project: { label: '$_id', download: 1, upload: 1, count: 1, _id: 0 } },
+    { $sort: { download: -1 } },
+    { $limit: limit },
+  ]);
+}
+
+module.exports = {
+  getTimeFilter,
+  getBaseFilter,
+  getCustomLabelsMap,
+  topFlowField
+};