Extract helper_functions.dart into a separate helper_functions pa…

…ckage (#1194)

The package `sharezone_widgets` used the `isNullOrEmpty()` /
`isNotNullOrEmpty()` method from the `sharezone_common` package.
However, the `sharezone_common` package has a lot of Firebase
dependencies. With extracting the `helper_functions.dart` into a
`helper_functions` package, I removed all Firebase dependencies from
`sharezone_widgets` 👍

app/lib/account/change_data_bloc.dart

@@ -14,7 +14,7 @@ import 'package:firebase_auth/firebase_auth.dart';
 import 'package:rxdart/rxdart.dart';
 import 'package:sharezone/util/api/user_api.dart';
 import 'package:sharezone_common/api_errors.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_utils/internet_access.dart';
 
 class ChangeDataBloc extends BlocBase with AuthentificationValidators {

app/lib/activation_code/src/bloc/enter_activation_code_bloc.dart

@@ -15,7 +15,7 @@ import 'package:flutter/material.dart';
 import 'package:key_value_store/key_value_store.dart';
 import 'package:rxdart/rxdart.dart';
 import 'package:sharezone/sharezone_plus/subscription_service/subscription_flag.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 
 import '../models/enter_activation_code_result.dart';
 import 'enter_activation_code_activator.dart';

app/lib/auth/email_and_password_link_bloc.dart

@@ -17,7 +17,7 @@ import 'package:rxdart/rxdart.dart';
 import 'package:sharezone/account/account_page_bloc.dart';
 import 'package:sharezone/account/profile/user_edit/user_edit_bloc.dart';
 import 'package:sharezone_common/api_errors.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 
 // * Using a shortcut getter method on the class to create simpler and friendlier API for the class to provide access of a particular function on StreamController

app/lib/auth/reset_pw_page.dart

@@ -14,7 +14,7 @@ import 'package:firebase_auth/firebase_auth.dart';
 import 'package:flutter/material.dart';
 import 'package:rxdart/rxdart.dart';
 import 'package:rxdart/subjects.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 
 import 'email_and_password_link_page.dart';

app/lib/blackboard/blackboard_card.dart

@@ -15,7 +15,7 @@ import 'package:sharezone/blackboard/blocs/blackboard_card_bloc.dart';
 import 'package:sharezone/blackboard/details/blackboard_details.dart';
 import 'package:sharezone/main/application_bloc.dart';
 import 'package:sharezone/util/launch_link.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 
 import 'blackboard_view.dart';

app/lib/blackboard/blackboard_item.dart

@@ -7,7 +7,7 @@
 // SPDX-License-Identifier: EUPL-1.2
 
 import 'package:cloud_firestore/cloud_firestore.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:sharezone_common/firebase_helper.dart';
 
 class BlackboardItem {
   final String id;

app/lib/blackboard/blocs/blackboard_dialog_bloc.dart

@@ -17,7 +17,7 @@ import 'package:sharezone/markdown/markdown_analytics.dart';
 import 'package:sharezone/util/api.dart';
 import 'package:sharezone_common/api_errors.dart';
 import 'package:sharezone_common/blackboard_validators.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_common/validators.dart';
 
 class BlackboardDialogBloc extends BlocBase with BlackboardValidators {

app/lib/calendrical_events/bloc/calendrical_events_page_cache.dart

@@ -8,7 +8,7 @@
 
 import 'package:key_value_store/key_value_store.dart';
 import 'package:sharezone/calendrical_events/models/calendrical_events_layout.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 
 class CalendricalEventsPageCache {
   final KeyValueStore keyValueStore;

app/lib/changelog/change_database_model.dart

@@ -8,7 +8,7 @@
 
 import 'package:cloud_firestore/cloud_firestore.dart';
 import 'package:sharezone/changelog/change.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:sharezone_common/firebase_helper.dart';
 
 class ChangeDatabaseModel {
   final String id;

app/lib/comments/comment_data_models.dart

@@ -8,7 +8,7 @@
 
 import 'package:cloud_firestore/cloud_firestore.dart';
 import 'package:sharezone/comments/comment.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:sharezone_common/firebase_helper.dart';
 
 class CommentDataModel {
   final String? id;

app/lib/comments/comments_analytics.dart

@@ -7,7 +7,7 @@
 // SPDX-License-Identifier: EUPL-1.2
 
 import 'package:analytics/analytics.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 
 import 'comments_gateway.dart';
 

app/lib/comments/widgets/user_comment_field.dart

@@ -10,7 +10,7 @@ import 'package:bloc_provider/bloc_provider.dart';
 import 'package:flutter/material.dart';
 import 'package:sharezone/auth/login_button.dart';
 import 'package:sharezone/comments/comments_bloc.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 
 class UserCommentField extends StatefulWidget {

app/lib/dashboard/dashboard_page.dart

@@ -49,7 +49,7 @@ import 'package:sharezone/widgets/animated_stream_list.dart';
 import 'package:sharezone/homework/shared/homework_card.dart';
 import 'package:sharezone/widgets/matching_type_of_user_builder.dart';
 import 'package:sharezone/widgets/material/modal_bottom_sheet_big_icon_button.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:platform_check/platform_check.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 import 'package:user/user.dart';

app/lib/dashboard/widgets/blackboard_card_dashboard.dart

@@ -12,7 +12,7 @@ import 'package:sharezone/blackboard/blackboard_card.dart';
 import 'package:sharezone/blackboard/blackboard_view.dart';
 import 'package:sharezone/blackboard/blocs/blackboard_card_bloc.dart';
 import 'package:sharezone/main/application_bloc.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 
 /// Diese BlackboardCard wird nun auf der Dashboard-Seite verwendet

app/lib/dynamic_links/einkommender_link.dart

@@ -7,7 +7,7 @@
 // SPDX-License-Identifier: EUPL-1.2
 
 import 'package:dynamic_links/dynamic_links.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 
 enum EinkommensZeitpunkt { appstart, laufzeit, unbekannt }
 

app/lib/feedback/src/models/user_feedback.dart

@@ -7,7 +7,7 @@
 // SPDX-License-Identifier: EUPL-1.2
 
 import 'package:cloud_firestore/cloud_firestore.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 
 class UserFeedback {
   final double? rating;

app/lib/filesharing/logic/select_cloud_file_action.dart

@@ -17,7 +17,7 @@ import 'package:sharezone/filesharing/widgets/download_unknown_file_type_dialog_
 import 'package:sharezone/filesharing/widgets/move_file_page.dart';
 import 'package:sharezone/report/page/report_page.dart';
 import 'package:sharezone/report/report_item.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:platform_check/platform_check.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 

app/lib/groups/group_join/models/group_join_result.dart

@@ -9,7 +9,7 @@
 import 'package:group_domain_models/group_domain_models.dart';
 import 'package:sharezone/groups/group_join/models/group_info_with_selection_state.dart';
 import 'package:sharezone/groups/group_join/models/group_join_exception.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:sharezone_common/firebase_helper.dart';
 
 abstract class GroupJoinResult {}
 

app/lib/groups/group_join/widgets/group_join_text_field.dart

@@ -13,7 +13,7 @@ import 'package:group_domain_models/group_domain_models.dart';
 import 'package:qr_code_scanner/qr_code_scanner.dart';
 import 'package:sharezone/main/application_bloc.dart';
 import 'package:sharezone/groups/group_join/bloc/group_join_bloc.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:platform_check/platform_check.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 

app/lib/groups/src/pages/course/course_details/course_member_options.dart

@@ -16,7 +16,7 @@ import 'package:group_domain_models/group_domain_models.dart';
 import 'package:sharezone/groups/src/pages/course/course_details/course_details_bloc.dart';
 import 'package:sharezone/groups/src/widgets/member_list.dart';
 import 'package:sharezone/main/application_bloc.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 
 Future<void> showCourseMemberOptionsSheet({
   required BuildContext context,

app/lib/groups/src/pages/course/course_details/write_permission_options.dart

@@ -8,7 +8,7 @@
 
 import 'package:flutter/material.dart';
 import 'package:group_domain_models/group_domain_models.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 
 import 'course_settings.dart';

app/lib/groups/src/pages/course/course_edit/course_edit_bloc.dart

@@ -14,7 +14,7 @@ import 'package:rxdart/rxdart.dart';
 import 'package:sharezone/util/api/course_gateway.dart';
 import 'package:sharezone_common/api_errors.dart';
 import 'package:sharezone_common/course_validators.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 
 class CourseEditPageBloc extends BlocBase with CourseValidators {
   final _subjectSubject = BehaviorSubject<String>();

app/lib/groups/src/pages/course/create/src/analytics/events/course_create_event.dart

@@ -7,7 +7,7 @@
 // SPDX-License-Identifier: EUPL-1.2
 
 import 'package:analytics/analytics.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 
 const groupPage = "group-page";
 const schoolClassPage = "school-class-page";

app/lib/groups/src/pages/course/create/src/bloc/course_create_bloc.dart

@@ -15,7 +15,7 @@ import 'package:sharezone/groups/src/pages/course/create/src/models/course_templ
 import 'package:sharezone/util/string_utils.dart';
 import 'package:sharezone_common/api_errors.dart';
 import 'package:sharezone_common/course_validators.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_common/validators.dart';
 
 import '../gateway/course_create_gateway.dart';

app/lib/groups/src/pages/school_class/create_course/school_class_create_course_bloc.dart

@@ -18,7 +18,7 @@ import 'package:sharezone/util/api.dart';
 import 'package:sharezone/util/string_utils.dart';
 import 'package:sharezone_common/api_errors.dart';
 import 'package:sharezone_common/course_validators.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_common/validators.dart';
 
 class SchoolClassCourseCreateBloc extends BlocBase with CourseValidators {

app/lib/groups/src/pages/school_class/school_class_details.dart

@@ -25,7 +25,7 @@ import 'package:sharezone/groups/src/widgets/sharecode_text.dart';
 import 'package:sharezone/report/report_icon.dart';
 import 'package:sharezone/report/report_item.dart';
 import 'package:sharezone/widgets/avatar_card.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 
 import 'school_class_details/school_class_course_list.dart';

app/lib/groups/src/pages/school_class/school_class_details/school_class_member_option.dart

@@ -17,7 +17,7 @@ import 'package:sharezone/groups/group_permission.dart';
 import 'package:sharezone/groups/src/pages/school_class/my_school_class_bloc.dart';
 import 'package:sharezone/groups/src/widgets/member_list.dart';
 import 'package:sharezone/main/application_bloc.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 
 Future<void> showSchoolClassMemberOptionsSheet({
   required BuildContext context,

app/lib/groups/src/widgets/group_share.dart

@@ -13,7 +13,7 @@ import 'package:group_domain_models/group_domain_models.dart';
 import 'package:share/share.dart';
 import 'package:sharezone/onboarding/group_onboarding/logic/group_onboarding_bloc.dart';
 import 'package:sharezone/onboarding/group_onboarding/logic/signed_up_bloc.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:platform_check/platform_check.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 

app/lib/groups/src/widgets/sharecode_text.dart

@@ -8,7 +8,7 @@
 
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:platform_check/platform_check.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 

app/lib/homework/shared/homework_list_section.dart

@@ -8,7 +8,7 @@
 
 import 'package:flutter/material.dart';
 import 'package:sharezone/homework/shared/animated_staggered_scroll_view.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 
 /// A List of homeworks with a leading title.
 ///

app/lib/markdown/markdown_analytics.dart

@@ -8,7 +8,7 @@
 
 import 'package:analytics/analytics.dart';
 import 'package:bloc_base/bloc_base.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 
 class MarkdownAnalytics extends BlocBase {
   final Analytics _analytics;

app/lib/navigation/drawer/tiles/drawer_tile.dart

@@ -11,7 +11,7 @@ import 'package:build_context/build_context.dart';
 import 'package:flutter/material.dart';
 import 'package:sharezone/navigation/logic/navigation_bloc.dart';
 import 'package:sharezone/navigation/models/navigation_item.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 
 import '../drawer_controller.dart';

app/lib/onboarding/group_onboarding/analytics/group_onboarding_analytics.dart

@@ -7,7 +7,7 @@
 // SPDX-License-Identifier: EUPL-1.2
 
 import 'package:analytics/analytics.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 
 class GroupOnboardingAnalytics {
   final Analytics _analytics;

app/lib/onboarding/group_onboarding/pages/create_schoolclass.dart

@@ -19,7 +19,7 @@ import 'package:sharezone/onboarding/group_onboarding/logic/group_onboarding_blo
 import 'package:sharezone/onboarding/group_onboarding/pages/create_courses.dart';
 import 'package:sharezone/onboarding/group_onboarding/pages/group_onboarding_page_template.dart';
 import 'package:sharezone/onboarding/sign_up/sign_up_page.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 import 'package:user/user.dart';
 

app/lib/onboarding/group_onboarding/pages/group_onboarding_page_template.dart

@@ -11,7 +11,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_staggered_animations/flutter_staggered_animations.dart';
 import 'package:sharezone/onboarding/group_onboarding/logic/group_onboarding_bloc.dart';
 import 'package:sharezone/onboarding/group_onboarding/widgets/title.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 
 class GroupOnboardingPageTemplate extends StatelessWidget {

app/lib/report/page/report_page_bloc.dart

@@ -11,7 +11,7 @@ import 'package:rxdart/rxdart.dart';
 import 'package:sharezone/report/report_factory.dart';
 import 'package:sharezone/report/report_item.dart' as ui;
 import 'package:sharezone_common/api_errors.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 
 import '../report.dart';
 import '../report_gateway.dart';

app/lib/settings/src/subpages/about/widgets/team.dart

@@ -7,7 +7,7 @@
 // SPDX-License-Identifier: EUPL-1.2
 
 import 'package:flutter/material.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 import 'about_section.dart';
 import 'social_media_button.dart';

app/lib/settings/src/subpages/my_profile/my_profile_page.dart

@@ -29,7 +29,7 @@ import 'package:sharezone/settings/src/subpages/my_profile/change_state.dart';
 import 'package:sharezone/settings/src/subpages/my_profile/my_profile_bloc.dart';
 import 'package:sharezone/widgets/material/list_tile_with_description.dart';
 import 'package:sharezone_common/api_errors.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 import 'package:streaming_shared_preferences/streaming_shared_preferences.dart';
 import 'package:url_launcher_extended/url_launcher_extended.dart';

app/lib/submissions/homework_create_submission_page.dart

@@ -14,7 +14,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_staggered_animations/flutter_staggered_animations.dart';
 import 'package:sharezone/filesharing/dialog/attach_file.dart';
 import 'package:sharezone/filesharing/widgets/cloud_file_icon.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:platform_check/platform_check.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 

app/lib/timetable/src/edit_time.dart

@@ -11,7 +11,7 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart' hide TimePickerEntryMode;
 import 'package:interval_time_picker/interval_time_picker.dart';
 import 'package:sharezone/settings/src/subpages/timetable/time_picker_settings_cache.dart';
-import 'package:sharezone_common/helper_functions.dart';
+import 'package:helper_functions/helper_functions.dart';
 import 'package:platform_check/platform_check.dart';
 import 'package:sharezone_widgets/sharezone_widgets.dart';
 import 'package:time/time.dart';

app/pubspec.yaml

@@ -115,6 +115,8 @@ dependencies:
     path: ../lib/hausaufgabenheft_logik
   holidays:
     path: ../lib/holidays
+  helper_functions:
+    path: ../lib/helper_functions
   http: ^1.1.2
   # Used so that we can select a minute interval (only either XX:00 or XX:30)
   # for the homework reminder time picker.