v2.4.2 patch3

.gitea/workflows/publish.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Set up .NET
         uses: https://github.com/actions/setup-dotnet@v4
         with:
-          dotnet-version: "10.0.302"
+          dotnet-version: "10.0.400"
 
       - name: Set up Node.js
         uses: https://github.com/actions/setup-node@v4
@@ -46,6 +46,11 @@ jobs:
           npm ci
           npm run build
 
+      - name: Install Chinese PDF font for backend tests
+        run: |
+          sudo apt-get update
+          sudo apt-get install --yes fonts-noto-cjk
+
       - name: Run backend tests
         run: dotnet test Jiaowu.slnx --configuration Release
 

src/Jiaowu.Api/Controllers/ExperimentsController.cs

@@ -503,12 +503,32 @@ public sealed class ExperimentsController(
                 x.CourseId != first.CourseId))
             return ValidationProblem("批量设置仅支持同一学期、同一课程的教学任务。");
 
+        if (request.ArrangementMode == ExperimentArrangementMode.SelfScheduled &&
+            request.ProjectCount is < 1 or > 100)
+            return ValidationProblem("自行安排一次可生成 1 至 100 个实验项目。");
+
         var code = request.Code.Trim();
+        var names = NormalizeBatchProjectNames(request.Names);
+        var definitionCount = request.ArrangementMode == ExperimentArrangementMode.SelfScheduled
+            ? request.ProjectCount
+            : 1;
+        if (request.ArrangementMode == ExperimentArrangementMode.SelfScheduled &&
+            names is not null && names.Count != definitionCount)
+            return ValidationProblem($"已填写 {names.Count} 个项目名称，请将生成项目数设为相同数量。");
+        if (request.ArrangementMode == ExperimentArrangementMode.SelfScheduled &&
+            taskIds.Count * definitionCount > 1000)
+            return ValidationProblem("本次最多生成 1000 个自行安排实验项目，请缩小教学任务或项目数量。");
+
+        var projectCodes = Enumerable.Range(1, definitionCount)
+            .Select(index => ProjectCode(code, index, definitionCount))
+            .ToList();
+        if (projectCodes.Any(item => item.Length > 40))
+            return ValidationProblem("项目编码前缀过长，无法追加顺序号。");
         if (request.ArrangementMode == ExperimentArrangementMode.SelfScheduled)
         {
             var conflictingTaskNumbers = await db.ExperimentProjects.AsNoTracking()
                 .WhereIn(taskIds, x => x.TeachingTaskId)
-                .Where(x => x.Code == code)
+                .Where(x => projectCodes.Contains(x.Code))
                 .Select(x => x.TeachingTask!.TaskNumber)
                 .OrderBy(x => x)
                 .ToListAsync(cancellationToken);
@@ -565,7 +585,7 @@ public sealed class ExperimentsController(
                 return ConflictProblem("所选实验课中已存在相同实验项目编码和周次，不能重复生成。");
         }
 
-        var projects = new List<ExperimentProject>(tasks.Count);
+        var projects = new List<ExperimentProject>(tasks.Count * definitionCount);
         foreach (var task in tasks)
         {
             var item = request.ForTeachingTask(task.Id);
@@ -594,12 +614,14 @@ public sealed class ExperimentsController(
                         continue;
                     }
                 }
+                for (var definitionIndex = 1; definitionIndex <= definitionCount; definitionIndex++)
+                {
                     projects.Add(new ExperimentProject
                     {
                         TeachingTaskId = task.Id,
                         ScheduleEntryId = occurrence.Entry?.Id,
                         ScheduleWeek = occurrence.Week,
-                    Code = code,
+                        Code = ProjectCode(code, definitionIndex, definitionCount),
                         Name = request.Name.Trim(),
                         ArrangementMode = request.ArrangementMode,
                         Description = Normalize(request.Description),
@@ -611,26 +633,38 @@ public sealed class ExperimentsController(
                     });
                 }
             }
+        }
 
-        var names = NormalizeBatchProjectNames(request.Names);
         if (request.GenerateSequentialNames)
         {
             if (names is not null)
                 return ValidationProblem("自动生成顺序号时无需填写逐行项目名称。");
-            var width = Math.Max(2, projects.Count.ToString().Length);
+            var width = Math.Max(2, (request.ArrangementMode == ExperimentArrangementMode.SelfScheduled
+                ? definitionCount
+                : projects.Count).ToString().Length);
             if (request.Name.Trim().Length + width + 1 > 120)
                 return ValidationProblem("项目名称前缀过长，无法追加顺序号。");
             for (var index = 0; index < projects.Count; index++)
-                projects[index].Name = $"{request.Name.Trim()} {(index + 1).ToString($"D{width}")}";
+            {
+                var number = request.ArrangementMode == ExperimentArrangementMode.SelfScheduled
+                    ? index % definitionCount + 1
+                    : index + 1;
+                projects[index].Name = $"{request.Name.Trim()} {number.ToString($"D{width}")}";
+            }
         }
         else if (names is not null)
         {
             if (names.Any(name => string.IsNullOrWhiteSpace(name) || name.Length > 120))
                 return ValidationProblem("每个实验项目名称均不能为空，且不能超过 120 个字符。");
-            if (names.Count != projects.Count)
+            var expectedNameCount = request.ArrangementMode == ExperimentArrangementMode.SelfScheduled
+                ? definitionCount
+                : projects.Count;
+            if (names.Count != expectedNameCount)
                 return ValidationProblem($"已填写 {names.Count} 个项目名称，但本次将生成 {projects.Count} 个实验项目；请确保每行对应一个项目。");
             for (var index = 0; index < projects.Count; index++)
-                projects[index].Name = names[index];
+                projects[index].Name = names[request.ArrangementMode == ExperimentArrangementMode.SelfScheduled
+                    ? index % definitionCount
+                    : index];
         }
 
         db.ExperimentProjects.AddRange(projects);
@@ -1174,6 +1208,106 @@ public sealed class ExperimentsController(
             .ToListAsync(cancellationToken));
     }
 
+    [HttpGet("sessions/{id:guid}/eligible-students")]
+    [Authorize(Roles = Managers)]
+    public async Task<ActionResult> GetProxyBookingStudents(
+        Guid id,
+        string? keyword,
+        CancellationToken cancellationToken)
+    {
+        var session = await LoadManagedSessionAsync(id, cancellationToken);
+        if (session is null) return NotFound();
+        if (!CanManageSession(session)) return Forbid();
+        if (session.ExperimentProject!.ArrangementMode != ExperimentArrangementMode.SelfScheduled)
+            return ConflictProblem("集中安排实验无需代选场次。");
+
+        var bookedStudentIds = await db.ExperimentBookings.AsNoTracking()
+            .Where(x => x.ExperimentProjectId == session.ExperimentProjectId &&
+                        x.Status == ExperimentBookingStatus.Booked)
+            .Select(x => x.StudentId)
+            .ToListAsync(cancellationToken);
+        var normalizedKeyword = string.IsNullOrWhiteSpace(keyword) ? null : keyword.Trim();
+        var roster = await TeachingTaskRosterQuery.LoadForTasksAsync(
+            db, [session.ExperimentProject.TeachingTaskId], cancellationToken);
+        return Ok(roster
+            .Where(x => !bookedStudentIds.Contains(x.StudentId))
+            .Where(x => normalizedKeyword is null ||
+                        x.StudentNumber.Contains(normalizedKeyword) ||
+                        x.Name.Contains(normalizedKeyword) ||
+                        x.ClassName.Contains(normalizedKeyword))
+            .OrderBy(x => x.StudentNumber)
+            .Take(100)
+            .Select(x => new { x.StudentId, x.StudentNumber, x.Name, x.ClassName }));
+    }
+
+    [HttpPost("sessions/{id:guid}/proxy-bookings")]
+    [Authorize(Roles = Managers)]
+    public async Task<ActionResult> CreateProxyBooking(
+        Guid id,
+        ProxyExperimentBookingRequest request,
+        CancellationToken cancellationToken)
+    {
+        return await db.ExecuteInRetriableTransactionAsync<ActionResult>(
+            async transaction =>
+            {
+                db.ChangeTracker.Clear();
+                var session = await LoadManagedSessionAsync(id, cancellationToken);
+                if (session is null) return NotFound();
+                if (!CanManageSession(session)) return Forbid();
+                if (session.Status != ExperimentSessionStatus.Scheduled ||
+                    session.ExperimentProject!.Status != ExperimentProjectStatus.Published ||
+                    session.ExperimentProject.ArrangementMode != ExperimentArrangementMode.SelfScheduled)
+                    return ConflictProblem("只能为已发布的自行安排实验场次代选学生。");
+
+                var student = await db.Students.FirstOrDefaultAsync(x =>
+                    x.Id == request.StudentId && x.Status == StudentStatus.Active,
+                    cancellationToken);
+                if (student is null) return ValidationProblem("学生不存在或不在学。");
+                if (!await TeachingTaskRosterQuery.TaskIdsForStudent(db, student.Id)
+                        .ContainsAsync(session.ExperimentProject.TeachingTaskId, cancellationToken))
+                    return ValidationProblem("该学生不在本实验项目的教学任务名单内。");
+
+                var existing = await db.ExperimentBookings.FirstOrDefaultAsync(x =>
+                    x.ExperimentProjectId == session.ExperimentProjectId && x.StudentId == student.Id,
+                    cancellationToken);
+                if (existing?.Status == ExperimentBookingStatus.Booked)
+                    return existing.ExperimentSessionId == session.Id
+                        ? NoContent()
+                        : ConflictProblem("该学生已预约本实验项目的其他场次。");
+
+                var scheduleProblem = await StudentConflictAsync(student.Id, session, cancellationToken);
+                if (scheduleProblem is not null) return ConflictProblem(scheduleProblem);
+                var reservedCount = await db.ExperimentBookings.CountAsync(x =>
+                    x.ExperimentSessionId == session.Id && x.Status == ExperimentBookingStatus.Booked,
+                    cancellationToken);
+                if (reservedCount >= session.Capacity)
+                    return ConflictProblem("该实验场次名额已满，请选择其他时间。");
+
+                if (existing is null)
+                {
+                    db.ExperimentBookings.Add(new ExperimentBooking
+                    {
+                        ExperimentProjectId = session.ExperimentProjectId,
+                        ExperimentSessionId = session.Id,
+                        StudentId = student.Id
+                    });
+                }
+                else
+                {
+                    existing.ExperimentSessionId = session.Id;
+                    existing.Status = ExperimentBookingStatus.Booked;
+                    existing.BookedAt = DateTime.UtcNow;
+                    existing.CancelledAt = null;
+                }
+                session.ReservedCount = reservedCount + 1;
+                await db.SaveChangesAsync(cancellationToken);
+                await transaction.CommitAsync(cancellationToken);
+                return NoContent();
+            },
+            cancellationToken,
+            IsolationLevel.Serializable);
+    }
+
     [HttpPost("sessions/{id:guid}/book")]
     [Authorize(Roles = SystemRoles.Student)]
     public async Task<ActionResult> Book(
@@ -1370,9 +1504,7 @@ public sealed class ExperimentsController(
             .FirstOrDefaultAsync(x =>
                 x.Id == request.ClassroomId && x.IsEnabled,
                 cancellationToken);
-        if (classroom is null) return "实验教室不存在或已停用。";
-        if (!TeachingVenueNatureRules.SupportsExperiment(classroom.TeachingVenueNature))
-            return "所选场地未标注实验教学性质。";
+        if (classroom is null) return "实验场地不存在或已停用。";
         if (request.Capacity > classroom.Capacity)
             return $"场次容量不能超过教室容量 {classroom.Capacity} 人。";
         if (project.ArrangementMode ==
@@ -1572,6 +1704,24 @@ public sealed class ExperimentsController(
             taskIds.Contains(x.TeachingTaskId));
     }
 
+    private Task<ExperimentSession?> LoadManagedSessionAsync(
+        Guid id,
+        CancellationToken cancellationToken) =>
+        db.ExperimentSessions
+            .Include(x => x.ExperimentProject)
+            .ThenInclude(x => x!.TeachingTask)
+            .ThenInclude(x => x!.AcademicTerm)
+            .Include(x => x.ExperimentProject)
+            .ThenInclude(x => x!.TeachingTask)
+            .ThenInclude(x => x!.Course)
+            .Include(x => x.ExperimentProject)
+            .ThenInclude(x => x!.TeachingTask)
+            .ThenInclude(x => x!.Teachers)
+            .ThenInclude(x => x.Teacher)
+            .Include(x => x.Instructors)
+            .ThenInclude(x => x.Teacher)
+            .FirstOrDefaultAsync(x => x.Id == id, cancellationToken);
+
     private bool CanManageSession(ExperimentSession session)
     {
         var scope = currentUserDataScope.Current;
@@ -1737,6 +1887,11 @@ public sealed class ExperimentsController(
         return names.Select(name => name.Trim()).ToList();
     }
 
+    private static string ProjectCode(string prefix, int index, int count) =>
+        count == 1
+            ? prefix
+            : $"{prefix}-{index.ToString($"D{Math.Max(2, count.ToString().Length)}")}";
+
     private ActionResult ConflictProblem(string detail) =>
         Conflict(new ProblemDetails
         {
@@ -1776,7 +1931,8 @@ public sealed record ExperimentProjectBatchRequest(
     IReadOnlyList<string>? Names = null,
     bool GenerateSequentialNames = false,
     DateTime? SelectionStartsAt = null,
-    DateTime? SelectionEndsAt = null)
+    DateTime? SelectionEndsAt = null,
+    [Range(1, 100)] int ProjectCount = 1)
 {
     public ExperimentProjectRequest ForTeachingTask(Guid teachingTaskId) =>
         new(
@@ -1809,6 +1965,8 @@ public sealed record ExperimentSessionRequest(
     [MaxLength(500)] string? Notes,
     [Required, MinLength(1)] IReadOnlyList<Guid>? InstructorTeacherIds = null);
 
+public sealed record ProxyExperimentBookingRequest(Guid StudentId);
+
 public sealed record ExperimentSessionBatchRequest(
     [Required] IReadOnlyList<ExperimentSessionBatchItem> Items);
 

src/Jiaowu.Api/Controllers/GradesController.cs

@@ -994,6 +994,100 @@ public sealed class GradesController(
         return Ok(new { Student = student, Records = records });
     }
 
+    /// <summary>
+    /// Returns the student's all-term academic metrics and the corresponding
+    /// rankings within their current administrative class, major and college.
+    /// Only formally published course grades participate in this calculation.
+    /// </summary>
+    [HttpGet("student/academic-overview")]
+    [Authorize(Roles = SystemRoles.Student)]
+    public async Task<ActionResult> GetStudentAcademicOverview(
+        CancellationToken cancellationToken)
+    {
+        var userId = currentUserDataScope.Current.UserId;
+        var student = await db.Students.AsNoTracking()
+            .Where(x => x.UserId == userId)
+            .Select(x => new StudentAcademicScope(
+                x.Id,
+                x.AdministrativeClassId,
+                x.AdministrativeClass!.MajorId,
+                x.AdministrativeClass.Major!.CollegeId))
+            .FirstOrDefaultAsync(cancellationToken);
+        if (student is null)
+            return ConflictProblem("当前账号未关联有效学生档案。");
+
+        var overview = await (cache ?? NoOpAppCache.Instance).GetOrCreateAsync(
+            AppCacheKeys.StudentAcademicOverview(student.Id),
+            token => BuildStudentAcademicOverviewAsync(student, token),
+            AppCacheProfile.Analytics,
+            [AppCacheTags.StudentAcademicStatistics],
+            cancellationToken);
+        return Ok(overview);
+    }
+
+    private async Task<StudentAcademicOverviewResponse> BuildStudentAcademicOverviewAsync(
+        StudentAcademicScope student,
+        CancellationToken cancellationToken)
+    {
+        var summary = await db.StudentAcademicStatistics.AsNoTracking()
+            .FirstOrDefaultAsync(x => x.StudentId == student.Id, cancellationToken);
+        var students = await db.StudentAcademicStatistics.AsNoTracking()
+            .Select(x => new StudentAcademicAggregate(
+                x.StudentId,
+                x.Student!.AdministrativeClassId,
+                x.Student.AdministrativeClass!.MajorId,
+                x.Student.AdministrativeClass.Major!.CollegeId,
+                x.CourseCount,
+                x.Gpa,
+                x.WeightedAverageScore,
+                x.AverageScore))
+            .ToListAsync(cancellationToken);
+        var current = summary is null
+            ? StudentAcademicAggregate.Empty(
+                student.Id,
+                student.AdministrativeClassId,
+                student.MajorId,
+                student.CollegeId)
+            : new StudentAcademicAggregate(
+                student.Id,
+                student.AdministrativeClassId,
+                student.MajorId,
+                student.CollegeId,
+                summary.CourseCount,
+                summary.Gpa,
+                summary.WeightedAverageScore,
+                summary.AverageScore);
+        var termTrend = await db.StudentAcademicTermStatistics.AsNoTracking()
+            .Where(x => x.StudentId == student.Id)
+            .OrderBy(x => x.AcademicTerm!.StartDate)
+            .Select(x => new StudentTermAcademicTrend(
+                x.AcademicTermId,
+                x.AcademicTerm!.Name,
+                x.CourseCount,
+                x.Gpa,
+                x.WeightedAverageScore,
+                x.AverageScore))
+            .ToListAsync(cancellationToken);
+
+        return new StudentAcademicOverviewResponse(
+            summary is null,
+            current.CourseCount,
+            summary?.CalculatedAt,
+            termTrend,
+            new StudentAcademicMetrics(
+                AcademicMetric.Create(current.Gpa, students, x => x.Gpa, current),
+                AcademicMetric.Create(
+                    current.WeightedAverageScore,
+                    students,
+                    x => x.WeightedAverageScore,
+                    current),
+                AcademicMetric.Create(
+                    current.AverageScore,
+                    students,
+                    x => x.AverageScore,
+                    current)));
+    }
+
     [HttpGet("sheets/{id:guid}/statistics")]
     [Authorize(Roles = StatisticsUsers)]
     public async Task<ActionResult> GetCourseStatistics(
@@ -1280,3 +1374,75 @@ public sealed record ImportExperimentScoresRequest(Guid GradeItemId);
 
 public sealed record GradeReviewRequest(
     [MaxLength(500)] string? Comment);
+
+internal sealed record StudentAcademicScope(
+    Guid Id,
+    Guid AdministrativeClassId,
+    Guid MajorId,
+    Guid CollegeId);
+
+internal sealed record StudentAcademicOverviewResponse(
+    bool IsRefreshing,
+    int CourseCount,
+    DateTime? CalculatedAt,
+    IReadOnlyCollection<StudentTermAcademicTrend> TermTrend,
+    StudentAcademicMetrics Metrics);
+
+internal sealed record StudentAcademicMetrics(
+    AcademicMetric Gpa,
+    AcademicMetric WeightedAverageScore,
+    AcademicMetric AverageScore);
+
+internal sealed record StudentAcademicAggregate(
+    Guid StudentId,
+    Guid ClassId,
+    Guid MajorId,
+    Guid CollegeId,
+    int CourseCount,
+    decimal? Gpa,
+    decimal? WeightedAverageScore,
+    decimal? AverageScore)
+{
+    public static StudentAcademicAggregate Empty(
+        Guid studentId,
+        Guid classId,
+        Guid majorId,
+        Guid collegeId) => new(studentId, classId, majorId, collegeId, 0, null, null, null);
+}
+
+internal sealed record AcademicMetric(
+    decimal? Value,
+    AcademicRank ClassRank,
+    AcademicRank MajorRank,
+    AcademicRank CollegeRank)
+{
+    public static AcademicMetric Create(
+        decimal? value,
+        IReadOnlyCollection<StudentAcademicAggregate> students,
+        Func<StudentAcademicAggregate, decimal?> selector,
+        StudentAcademicAggregate current) => new(
+            value.HasValue ? Math.Round(value.Value, 2, MidpointRounding.AwayFromZero) : null,
+            Rank(value, students.Where(x => x.ClassId == current.ClassId), selector),
+            Rank(value, students.Where(x => x.MajorId == current.MajorId), selector),
+            Rank(value, students.Where(x => x.CollegeId == current.CollegeId), selector));
+
+    private static AcademicRank Rank(
+        decimal? value,
+        IEnumerable<StudentAcademicAggregate> peers,
+        Func<StudentAcademicAggregate, decimal?> selector)
+    {
+        var values = peers.Select(selector).Where(x => x.HasValue).Select(x => x!.Value).ToList();
+        if (!value.HasValue) return new AcademicRank(null, values.Count);
+        return new AcademicRank(values.Count(x => x > value.Value) + 1, values.Count);
+    }
+}
+
+internal sealed record AcademicRank(int? Rank, int PeerCount);
+
+internal sealed record StudentTermAcademicTrend(
+    Guid AcademicTermId,
+    string TermName,
+    int CourseCount,
+    decimal? Gpa,
+    decimal? WeightedAverageScore,
+    decimal? AverageScore);