Initial commit: teaching institution management API.

Express/MongoDB backend with JWT auth, RBAC, S3 uploads, notifications, and scheduled jobs.
2026-08-09 04:18:08 +02:00
commit f04c797be6
107 changed files with 9190 additions and 0 deletions
@@ -0,0 +1,123 @@
+// /components/dashboard/dashboardService.js
+'use strict';
+
+const User = require('../users/userModel');
+const Professor = require('../professors/professorModel');
+const Course = require('../courses/courseModel');
+const Session = require('../sessions/sessionModel');
+
+/**
+ * Returns aggregated statistics for the admin dashboard
+ */
+const getAdminStats = async () => {
+  const [
+    totalUsers,
+    activeUsers,
+    totalProfessors,
+    activeProfessors,
+    totalCourses,
+    totalSessions,
+    recentSessions
+  ] = await Promise.all([
+    User.countDocuments({}),
+    User.countDocuments({ isActive: true }),
+    Professor.countDocuments({}),
+    Professor.countDocuments({ isActive: true }),
+    Course.countDocuments({}),
+    Session.countDocuments({}),
+    Session.find({})
+      .sort({ day: -1 })
+      .limit(8)
+      .populate('course', 'title type')
+      .populate('class', 'name')
+      .populate('professor', 'name surname')
+      .lean()
+  ]);
+
+  // Daily enrollment trend (last 14 days via User.createdAt)
+  const daysBack = 13;
+  const rangeStart = new Date();
+  rangeStart.setHours(0, 0, 0, 0);
+  rangeStart.setDate(rangeStart.getDate() - daysBack);
+
+  const dailyUsersRaw = await User.aggregate([
+    { $match: { createdAt: { $gte: rangeStart } } },
+    {
+      $group: {
+        _id: {
+          year: { $year: '$createdAt' },
+          month: { $month: '$createdAt' },
+          day: { $dayOfMonth: '$createdAt' }
+        },
+        count: { $sum: 1 }
+      }
+    },
+    { $sort: { '_id.year': 1, '_id.month': 1, '_id.day': 1 } }
+  ]);
+
+  // Fill every day in the range so the chart stays continuous
+  const dailyUsers = [];
+  for (let i = 0; i <= daysBack; i += 1) {
+    const date = new Date(rangeStart);
+    date.setDate(rangeStart.getDate() + i);
+    const year = date.getFullYear();
+    const month = date.getMonth() + 1;
+    const day = date.getDate();
+    const match = dailyUsersRaw.find(
+      (item) => item._id.year === year && item._id.month === month && item._id.day === day
+    );
+    dailyUsers.push({
+      _id: { year, month, day },
+      date: date.toISOString(),
+      count: match ? match.count : 0
+    });
+  }
+
+  // Daily sessions trend (same window)
+  const dailySessionsRaw = await Session.aggregate([
+    { $match: { createdAt: { $gte: rangeStart } } },
+    {
+      $group: {
+        _id: {
+          year: { $year: '$createdAt' },
+          month: { $month: '$createdAt' },
+          day: { $dayOfMonth: '$createdAt' }
+        },
+        count: { $sum: 1 }
+      }
+    },
+    { $sort: { '_id.year': 1, '_id.month': 1, '_id.day': 1 } }
+  ]);
+
+  const dailySessions = dailyUsers.map((day) => {
+    const match = dailySessionsRaw.find(
+      (item) =>
+        item._id.year === day._id.year &&
+        item._id.month === day._id.month &&
+        item._id.day === day._id.day
+    );
+    return {
+      _id: day._id,
+      date: day.date,
+      count: match ? match.count : 0
+    };
+  });
+
+  return {
+    totals: {
+      users: totalUsers,
+      activeUsers,
+      professors: totalProfessors,
+      activeProfessors,
+      courses: totalCourses,
+      sessions: totalSessions
+    },
+    recentSessions,
+    charts: {
+      dailyUsers,
+      dailySessions
+    }
+  };
+};
+
+module.exports = { getAdminStats };