changed everything from filcnaplo to refilc finally

refilc/lib/utils/reverse_search.dart

@@ -0,0 +1,44 @@
+import 'dart:developer';
+
+import 'package:refilc_kreta_api/models/absence.dart';
+import 'package:refilc_kreta_api/models/lesson.dart';
+import 'package:refilc_kreta_api/models/week.dart';
+import 'package:refilc_kreta_api/providers/timetable_provider.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:provider/provider.dart';
+
+class ReverseSearch {
+  static Future<Lesson?> getLessonByAbsence(
+      Absence absence, BuildContext context) async {
+    final timetableProvider =
+        Provider.of<TimetableProvider>(context, listen: false);
+
+    List<Lesson> lessons = [];
+    final week = Week.fromDate(absence.date);
+    try {
+      await timetableProvider.fetch(week: week);
+    } catch (e) {
+      log("[ERROR] getLessonByAbsence: $e");
+    }
+    lessons = timetableProvider.getWeek(week) ?? [];
+
+    // Find absence lesson in timetable
+    Lesson lesson = lessons.firstWhere(
+      (l) =>
+          _sameDate(l.date, absence.date) &&
+          l.subject.id == absence.subject.id &&
+          l.lessonIndex == absence.lessonIndex.toString(),
+      orElse: () => Lesson.fromJson({'isEmpty': true}),
+    );
+
+    if (lesson.isEmpty) {
+      return null;
+    } else {
+      return lesson;
+    }
+  }
+
+  // difference.inDays is not reliable
+  static bool _sameDate(DateTime a, DateTime b) =>
+      (a.year == b.year && a.month == b.month && a.day == b.day);
+}