Klassenbucheinträge abgleich und poll

2026-08-25 09:31:41 +02:00
parent 87a7badb44
commit 7fa8a93c82
14 changed files with 584 additions and 9 deletions
@@ -0,0 +1,53 @@
+using System.Globalization;
+
+namespace LehrerApp.WebUntis;
+
+public static class WebUntisClassRegisterEventReportParser
+{
+    public static IReadOnlyList<UntisClassRegisterEventReportEntry> Parse(string content)
+    {
+        var rows = TabSeparatedTextReader.ParseRows(content, '\t');
+        if (rows.Count == 0) return [];
+
+        var headers = rows[0]
+            .Select((header, index) => (index == 0 ? header.TrimStart('\uFEFF') : header).Trim())
+            .ToArray();
+        var result = new List<UntisClassRegisterEventReportEntry>();
+
+        foreach (var row in rows.Skip(1))
+        {
+            if (row.All(string.IsNullOrWhiteSpace)) continue;
+
+            var values = new Dictionary<string, string?>(StringComparer.Ordinal);
+            for (var index = 0; index < headers.Length; index++)
+                values[headers[index]] = index < row.Count ? row[index].Trim() : null;
+
+            result.Add(new UntisClassRegisterEventReportEntry(
+                Get(values, "Klasse")?.Trim() ?? "",
+                GermanShortDate(Get(values, "Datum")) ?? throw new InvalidDataException(
+                    "Ungültiges Datum in Spalte \"Datum\"."),
+                Optional(Get(values, "Fach")),
+                Get(values, "Name")?.Trim() ?? "",
+                Optional(Get(values, "Benutzer")),
+                Optional(Get(values, "Eintragskategorie")),
+                Optional(Get(values, "Kategoriegruppe")),
+                Optional(Get(values, "Text"))));
+        }
+
+        return result;
+    }
+
+    private static string? Get(IReadOnlyDictionary<string, string?> values, string key) =>
+        values.TryGetValue(key, out var value) ? value : null;
+
+    private static string? Optional(string? value) =>
+        string.IsNullOrWhiteSpace(value) ? null : value.Trim();
+
+    private static int? GermanShortDate(string? value)
+    {
+        if (!DateOnly.TryParseExact(value?.Trim(), "dd.MM.yy", CultureInfo.InvariantCulture,
+                DateTimeStyles.None, out var date))
+            return null;
+        return date.Year * 10_000 + date.Month * 100 + date.Day;
+    }
+}