Kapitel 7 abgeschlossen.

2026-08-16 00:29:01 +02:00
parent da8d2bb1da
commit f9e398b225
47 changed files with 2636 additions and 107 deletions
@@ -0,0 +1,108 @@
+using LehrerApp.Core.Interfaces;
+using LehrerApp.Core.Models;
+
+namespace LehrerApp.Core.Services;
+
+public sealed record GroupRolloverRequest(
+    string Name,
+    string TargetSchoolYear,
+    int GradeLevel,
+    IReadOnlyCollection<Guid> MembershipIds,
+    bool CopyGradingScheme,
+    bool ArchiveSource);
+
+/// <summary>Erzeugt eine fachlich saubere Folgegruppe ohne Leistungs- oder Planungsdaten.</summary>
+public sealed class GroupRolloverService(
+    IGroupRepository groups,
+    IGroupMembershipRepository memberships,
+    IGradingSchemeRepository gradingSchemes,
+    SchoolYearService schoolYears)
+{
+    public LearningGroup RollOver(LearningGroup source, GroupRolloverRequest request)
+    {
+        var targetSchoolYear = request.TargetSchoolYear.Trim();
+        var targetStart = schoolYears.SchoolYearStart(targetSchoolYear);
+        if (targetSchoolYear != schoolYears.FormatSchoolYear(targetStart.Year))
+            throw new InvalidOperationException("Das Zielschuljahr muss das Format JJJJ/JJ haben, z.B. 2027/28.");
+        var sourceStart = schoolYears.SchoolYearStart(source.SchoolYear);
+        if (targetStart <= sourceStart)
+            throw new InvalidOperationException("Das Zielschuljahr muss nach dem bisherigen Schuljahr liegen.");
+        if (request.GradeLevel is < 1 or > 13)
+            throw new InvalidOperationException("Die Klassenstufe muss zwischen 1 und 13 liegen.");
+        if (string.IsNullOrWhiteSpace(request.Name))
+            throw new InvalidOperationException("Bitte einen Gruppennamen angeben.");
+
+        var duplicate = groups.GetBySchoolYear(targetSchoolYear, includeInactive: true)
+            .Any(g => g.Name.Equals(request.Name.Trim(), StringComparison.OrdinalIgnoreCase)
+                      && g.SubjectId == source.SubjectId && g.Type == source.Type);
+        if (duplicate)
+            throw new InvalidOperationException(
+                "Im Zielschuljahr existiert bereits eine gleichnamige Gruppe mit demselben Fach und Typ.");
+
+        var sourceMemberships = memberships.GetByGroup(source.Id)
+            .ToDictionary(m => m.Id);
+        var selected = request.MembershipIds.Distinct()
+            .Select(id => sourceMemberships.GetValueOrDefault(id)
+                ?? throw new InvalidOperationException("Eine ausgewählte Mitgliedschaft gehört nicht mehr zur Ausgangsgruppe."))
+            .ToList();
+        if (selected.Count == 0)
+            throw new InvalidOperationException("Bitte mindestens einen Schüler auswählen.");
+
+        var target = new LearningGroup
+        {
+            Name = request.Name.Trim(),
+            Type = source.Type,
+            SubjectId = source.SubjectId,
+            SchoolYear = targetSchoolYear,
+            GradeLevel = request.GradeLevel,
+            GradingSystem = source.GradingSystem,
+            HoursPerWeek = source.HoursPerWeek,
+            IsActive = true,
+            IsOwnClass = source.IsOwnClass,
+            IsDifferentiated = source.IsDifferentiated,
+        };
+
+        var sourceWasActive = source.IsActive;
+        try
+        {
+            groups.Save(target);
+            foreach (var membership in selected)
+            {
+                memberships.Save(new GroupMembership
+                {
+                    StudentId = membership.StudentId,
+                    GroupId = target.Id,
+                    AddedOn = DateOnly.FromDateTime(DateTime.Today),
+                    Period = MembershipPeriod.FullYear,
+                    JoinedAt = targetStart,
+                    LeftAt = null,
+                    Niveau = membership.Niveau,
+                });
+            }
+
+            if (request.CopyGradingScheme && gradingSchemes.GetByGroup(source.Id) is { } scheme)
+            {
+                gradingSchemes.Save(new GradingScheme
+                {
+                    GroupId = target.Id,
+                    ExamsPercent = scheme.ExamsPercent,
+                    ParticipationPercent = scheme.ParticipationPercent,
+                    OtherPercent = scheme.OtherPercent,
+                });
+            }
+
+            if (request.ArchiveSource && source.IsActive)
+            {
+                source.IsActive = false;
+                groups.Save(source);
+            }
+            return target;
+        }
+        catch
+        {
+            source.IsActive = sourceWasActive;
+            groups.Delete(target.Id);
+            throw;
+        }
+    }
+}