Added measurements, and devices statsh

Added stats endpoints

database/contract/contract.go

@@ -241,3 +241,61 @@ func GetContractByID(contractID uint) (models.Contract, int, error) {
 
 	return contract, http.StatusOK, nil
 }
+
+func CountContractsByMultipleStatusesAndTotal(companyID uint, startTime, endTime time.Time) (int64, int64, int64, map[string]map[string]int64, error) {
+    var activeCount, executedCount, totalCount int64
+    monthlyCounts := make(map[string]map[string]int64)
+
+    var contract models.Contract
+
+    // Iterate through each month within the specified date range
+    for dt := startTime; dt.Before(endTime); dt = dt.AddDate(0, 1, 0) {
+        monthEnd := dt.AddDate(0, 1, 0)
+        if monthEnd.After(endTime) {
+            monthEnd = endTime
+        }
+
+        // Initialize monthlyCounts for the current month
+        monthKey := dt.Format("2006-01")
+        monthlyCounts[monthKey] = map[string]int64{"active": 0, "executed": 0, "total": 0}
+
+        // Query for 'active' contracts for the current month
+        var active int64
+        err := shared.GetDb().Model(&contract).
+            Where("status = ? AND (buyer_id = ? OR seller_id = ?) AND start_time >= ? AND end_time <= ?", "active", companyID, companyID, dt, monthEnd).
+            Count(&active).Error
+        if err != nil {
+            return 0, 0, 0, nil, err
+        }
+
+        // Query for 'executed' contracts for the current month
+        var executed int64
+        err = shared.GetDb().Model(&contract).
+            Where("status = ? AND (buyer_id = ? OR seller_id = ?) AND start_time >= ? AND end_time <= ?", "executed", companyID, companyID, dt, monthEnd).
+            Count(&executed).Error
+        if err != nil {
+            return 0, 0, 0, nil, err
+        }
+
+        // Query for total contracts for the current month
+        var total int64
+        err = shared.GetDb().Model(&contract).
+            Where("(buyer_id = ? OR seller_id = ?) AND start_time >= ? AND end_time <= ?", companyID, companyID, dt, monthEnd).
+            Count(&total).Error
+        if err != nil {
+            return 0, 0, 0, nil, err
+        }
+
+        // Update the counts for the current month
+        monthlyCounts[monthKey]["active"] = active
+        monthlyCounts[monthKey]["executed"] = executed
+        monthlyCounts[monthKey]["total"] = total
+
+        // Update the total counts
+        activeCount += active
+        executedCount += executed
+        totalCount += total
+    }
+
+    return activeCount, executedCount, totalCount, monthlyCounts, nil
+}