fix(lints): prefer_typing_uninitialized_variables rule

analysis_options.yaml

@@ -16,21 +16,10 @@ linter:
 
     avoid_redundant_argument_values: false
 
-    # Unnecessary use of this in constructors should not be done
-    unnecessary_this: false
-
-    leading_newlines_in_multiline_strings: false
-
-    type_annotate_public_apis: false
-
-    directives_ordering: false
-
     avoid_function_literals_in_foreach_calls: false
 
     join_return_with_assignment: false
 
     non_constant_identifier_names:  false
 
     constant_identifier_names: false
-
-    prefer_typing_uninitialized_variables: false

lib/services/ib_engine_service.dart

@@ -53,7 +53,7 @@ class IbEngineServiceImpl implements IbEngineService {
     bool ignoreIndex = false,
   }) async {
     /// Fetch response from API for the given id
-    var _apiResponse;
+    List<Map<String, dynamic>> _apiResponse;
     try {
       _apiResponse = await _ibApi.fetchApiPage(id: id);
     } catch (_) {
@@ -138,7 +138,7 @@ class IbEngineServiceImpl implements IbEngineService {
       return _ibChapters;
     }
 
-    var _chapters;
+    List<IbChapter> _chapters;
     try {
       _chapters = await _fetchPagesInDir(ignoreIndex: true);
     } on Failure catch (e) {

lib/ui/views/groups/add_assignment_view.dart

@@ -207,7 +207,7 @@ class _AddAssignmentViewState extends State<AddAssignmentView> {
       _dialogService.showCustomProgressDialog(title: 'Adding..');
 
       // [ISSUE] [html_editor] Throws error in Tests
-      var _descriptionEditorText;
+      String _descriptionEditorText;
       try {
         _descriptionEditorText =
             await _descriptionEditor.currentState.getText();

lib/ui/views/groups/update_assignment_view.dart

@@ -186,7 +186,7 @@ class _UpdateAssignmentViewState extends State<UpdateAssignmentView> {
       _dialogService.showCustomProgressDialog(title: 'Updating..');
 
       // [ISSUE] [html_editor] Throws error in Tests
-      var _descriptionEditorText;
+      String _descriptionEditorText;
       try {
         _descriptionEditorText =
             await _descriptionEditor.currentState.getText();

lib/ui/views/ib/syntaxes/ib_liquid_syntax.dart

@@ -8,7 +8,7 @@ class IbLiquidSyntax extends md.BlockSyntax {
   md.Node parse(md.BlockParser parser) {
     var match = pattern.firstMatch(parser.current);
     var tags = match[1].split(' ');
-    var node;
+    md.Element node;
 
     // Liquid include tags
     if (tags[0] == 'include') {

lib/utils/app_exceptions.dart

@@ -1,6 +1,7 @@
 class AppException implements Exception {
-  final _message;
-  final _prefix;
+  final String _message;
+
+  final String _prefix;
 
   AppException([this._message, this._prefix]);