add

server/internal/db/exam_status.go

@@ -0,0 +1,63 @@
+package db
+
+import (
+	"time"
+
+	"server/internal/models"
+
+	"gorm.io/gorm"
+)
+
+// ExamDisplayStatus trạng thái hiển thị (tính từ DB status + thời gian).
+func ExamDisplayStatus(room models.ExamRoom, now time.Time) string {
+	switch room.Status {
+	case models.ExamStatusCancelled:
+		return models.ExamStatusCancelled
+	case models.ExamStatusEnded:
+		return models.ExamStatusEnded
+	case models.ExamStatusDraft:
+		return models.ExamStatusDraft
+	case models.ExamStatusReady:
+		if now.After(room.EndTime) {
+			return models.ExamStatusEnded
+		}
+		if !now.Before(room.StartTime) {
+			return "active"
+		}
+		return models.ExamStatusReady
+	default:
+		return models.ExamStatusDraft
+	}
+}
+
+func ExamRoomEditable(room models.ExamRoom) bool {
+	return room.Status == models.ExamStatusDraft
+}
+
+// ExamRoomPrepEditable — chỉnh gói đề, sinh viên trước khi thi bắt đầu.
+func ExamRoomPrepEditable(room models.ExamRoom, now time.Time) bool {
+	if room.Status == models.ExamStatusDraft {
+		return true
+	}
+	return room.Status == models.ExamStatusReady && now.Before(room.StartTime)
+}
+
+func ExamRoomCanUnpublish(room models.ExamRoom, now time.Time) bool {
+	return room.Status == models.ExamStatusReady && now.Before(room.StartTime)
+}
+
+func ExamRoomIsLive(room models.ExamRoom, now time.Time) bool {
+	return ExamDisplayStatus(room, now) == "active"
+}
+
+func ExamRoomCanCancel(room models.ExamRoom, now time.Time) bool {
+	return ExamRoomIsLive(room, now)
+}
+
+// ProcessExamRoomLifecycle đánh dấu phòng ready đã quá giờ kết thúc.
+func ProcessExamRoomLifecycle(db *gorm.DB) {
+	now := time.Now()
+	_ = db.Model(&models.ExamRoom{}).
+		Where("status = ? AND end_time < ?", models.ExamStatusReady, now).
+		Update("status", models.ExamStatusEnded).Error
+}