init 1.0.0

2026-06-19 00:42:00 +02:00
commit 5ca960746b
67 changed files with 3261 additions and 0 deletions
@@ -0,0 +1,22 @@
+namespace LehrerApp.Core.Services;
+
+public class SchoolYearService
+{
+    public string CurrentSchoolYear()
+    {
+        var now = DateTime.Today;
+        return FormatSchoolYear(now.Month >= 8 ? now.Year : now.Year - 1);
+    }
+    public string FormatSchoolYear(int startYear) =>
+        $"{startYear}/{(startYear + 1) % 100:D2}";
+    public DateOnly SchoolYearStart(string sy) =>
+        new(int.Parse(sy.Split('/')[0]), 8, 1);
+    public DateOnly SchoolYearEnd(string sy) =>
+        new(int.Parse(sy.Split('/')[0]) + 1, 7, 31);
+    public List<string> RecentSchoolYears(int count = 5)
+    {
+        var now = DateTime.Today;
+        var cur = now.Month >= 8 ? now.Year : now.Year - 1;
+        return Enumerable.Range(0, count).Select(i => FormatSchoolYear(cur - i)).ToList();
+    }
+}