教室预约

2026-07-26 20:11:56 +08:00
parent b0679a253d
commit 9f534c22f4
14 changed files with 7436 additions and 31 deletions
@@ -0,0 +1,102 @@
+using Jiaowu.Api.Domain.Academic;
+using Jiaowu.Api.Infrastructure.Persistence;
+using Microsoft.EntityFrameworkCore;
+
+namespace Jiaowu.Api.Infrastructure.Timetables;
+
+public sealed class ClassroomReservationAvailabilityService(AppDbContext db)
+{
+    public async Task<HashSet<Guid>> GetOccupiedClassroomIdsAsync(
+        AcademicTerm term,
+        DateOnly reservationDate,
+        int startPeriod,
+        int periodCount,
+        Guid? excludedReservationId,
+        CancellationToken cancellationToken)
+    {
+        var occupiedIds = new HashSet<Guid>();
+        var (week, dayOfWeek) = ResolveTeachingWeek(term, reservationDate);
+
+        var scheduleEntries = await db.ScheduleEntries.AsNoTracking()
+            .Where(entry =>
+                entry.ClassroomId.HasValue &&
+                entry.SchedulePlan!.AcademicTermId == term.Id &&
+                entry.SchedulePlan.Status == SchedulePlanStatus.Published &&
+                entry.DayOfWeek == dayOfWeek &&
+                entry.StartWeek <= week &&
+                entry.EndWeek >= week &&
+                entry.StartPeriod < startPeriod + periodCount &&
+                startPeriod < entry.StartPeriod + entry.PeriodCount)
+            .Select(entry => new
+            {
+                entry.ClassroomId,
+                entry.WeekPattern,
+                entry.StartPeriod,
+                entry.PeriodCount
+            })
+            .ToListAsync(cancellationToken);
+        foreach (var entry in scheduleEntries.Where(entry =>
+                     FreeClassroomRules.MatchesWeek(entry.WeekPattern, week) &&
+                     FreeClassroomRules.PeriodsOverlap(
+                         startPeriod,
+                         periodCount,
+                         entry.StartPeriod,
+                         entry.PeriodCount)))
+        {
+            occupiedIds.Add(entry.ClassroomId!.Value);
+        }
+
+        var examRoomIds = await db.ExamSessions.AsNoTracking()
+            .Where(session =>
+                session.ClassroomId.HasValue &&
+                session.ExamPlan!.AcademicTermId == term.Id &&
+                session.ExamPlan.Status == ExamPlanStatus.Published &&
+                session.ExamDate == reservationDate &&
+                session.StartPeriod < startPeriod + periodCount &&
+                startPeriod < session.StartPeriod + session.PeriodCount)
+            .Select(session => session.ClassroomId!.Value)
+            .ToListAsync(cancellationToken);
+        occupiedIds.UnionWith(examRoomIds);
+
+        var makeupExamRoomIds = await db.MakeupExamSessions.AsNoTracking()
+            .Where(session =>
+                session.ClassroomId.HasValue &&
+                session.MakeupExamPlan!.AcademicTermId == term.Id &&
+                session.MakeupExamPlan.Status == MakeupExamPlanStatus.Published &&
+                session.ExamDate == reservationDate &&
+                session.StartPeriod < startPeriod + periodCount &&
+                startPeriod < session.StartPeriod + session.PeriodCount)
+            .Select(session => session.ClassroomId!.Value)
+            .ToListAsync(cancellationToken);
+        occupiedIds.UnionWith(makeupExamRoomIds);
+
+        var reservationQuery = db.ClassroomReservations.AsNoTracking()
+            .Where(reservation =>
+                reservation.AcademicTermId == term.Id &&
+                reservation.Status == ClassroomReservationStatus.Approved &&
+                reservation.ReservationDate == reservationDate &&
+                reservation.StartPeriod < startPeriod + periodCount &&
+                startPeriod <
+                    reservation.StartPeriod + reservation.PeriodCount);
+        if (excludedReservationId.HasValue)
+            reservationQuery = reservationQuery.Where(reservation =>
+                reservation.Id != excludedReservationId.Value);
+        var reservationRoomIds = await reservationQuery
+            .Select(reservation => reservation.ClassroomId)
+            .ToListAsync(cancellationToken);
+        occupiedIds.UnionWith(reservationRoomIds);
+        return occupiedIds;
+    }
+
+    public static (int Week, int DayOfWeek) ResolveTeachingWeek(
+        AcademicTerm term,
+        DateOnly date)
+    {
+        var termStartDay = (int)term.StartDate.DayOfWeek;
+        var daysSinceMonday = (termStartDay + 6) % 7;
+        var firstWeekMonday = term.StartDate.AddDays(-daysSinceMonday);
+        var week = (date.DayNumber - firstWeekMonday.DayNumber) / 7 + 1;
+        var dayOfWeek = ((int)date.DayOfWeek + 6) % 7 + 1;
+        return (week, dayOfWeek);
+    }
+}