kreta_client: evict cache when not using forceCache

firka/lib/helpers/api/client/kreta_client.dart

@@ -166,7 +166,11 @@ class KretaClient {
   ApiResponse<Student>? studentCache;
 
   Future<ApiResponse<Student>> getStudent({bool forceCache = true}) async {
-    if (forceCache && studentCache != null) return studentCache!;
+    if (!forceCache) {
+      studentCache = null;
+    } else if (studentCache != null) {
+      return studentCache!;
+    }
     var (resp, status, ex, cached) = await _cachingGet(CacheId.getStudent,
         KretaEndpoints.getStudentUrl(model.iss!), forceCache, 0);
 
@@ -191,7 +195,11 @@ class KretaClient {
 
   Future<ApiResponse<List<ClassGroup>>> getClassGroups(
       {bool forceCache = true}) async {
-    if (forceCache && classGroupCache != null) return classGroupCache!;
+    if (!forceCache) {
+      classGroupCache = null;
+    } else {
+      if (classGroupCache != null) return classGroupCache!;
+    }
     var (resp, status, ex, cached) = await _cachingGet(CacheId.getClassGroup,
         KretaEndpoints.getClassGroups(model.iss!), forceCache, 0);
 
@@ -219,7 +227,11 @@ class KretaClient {
 
   Future<ApiResponse<List<NoticeBoardItem>>> getNoticeBoard(
       {bool forceCache = true}) async {
-    if (forceCache && noticeBoardCache != null) return noticeBoardCache!;
+    if (!forceCache) {
+      noticeBoardCache = null;
+    } else if (noticeBoardCache != null) {
+      return noticeBoardCache!;
+    }
     var (resp, status, ex, cached) = await _cachingGet(CacheId.getNoticeBoard,
         KretaEndpoints.getNoticeBoard(model.iss!), forceCache, 0);
 
@@ -274,7 +286,9 @@ class KretaClient {
   ApiResponse<List<Grade>>? gradeCache;
 
   Future<ApiResponse<List<Grade>>> getGrades({bool forceCache = true}) async {
-    if (forceCache && gradeCache != null) {
+    if (!forceCache) {
+      gradeCache = null;
+    } else if (gradeCache != null) {
       return gradeCache!;
     }
     var (resp, status, ex, cached) = await _cachingGet(
@@ -577,7 +591,11 @@ class KretaClient {
 
   Future<ApiResponse<List<Omission>>> getOmissions(
       {bool forceCache = true}) async {
-    if (omissionsCache != null) return omissionsCache!;
+    if (!forceCache) {
+      omissionsCache = null;
+    } else {
+      if (omissionsCache != null) return omissionsCache!;
+    }
     var (resp, status, ex, cached) = await _cachingGet(CacheId.getOmissions,
         KretaEndpoints.getOmissions(model.iss!), forceCache, 0);
 

firka/lib/ui/phone/pages/home/home_timetable_mo.dart

@@ -46,9 +46,6 @@ class _HomeTimetableMonthlyScreen extends State<HomeTimetableMonthlyScreen> {
   _HomeTimetableMonthlyScreen();
 
   Future<void> initForMonth(DateTime now, {bool forceCache = true}) async {
-    if (!forceCache) {
-      widget.data.client.evictMemCache();
-    }
     final monthStart = DateTime.utc(now.year, now.month, 1);
     final monthEnd =
         DateTime.utc(now.year, now.month + 1).subtract(Duration(days: 1));