implement quick_fix for talawa_good_doc and enforce tab before None of params block

lib/locator.dart

@@ -78,7 +78,7 @@ final imagePicker = locator<ImagePicker>();
 /// This function registers the widgets/objects in "GetIt".
 ///
 /// **params**:
-///  None
+///   None
 ///
 /// **returns**:
 ///   None

lib/main.dart

@@ -73,7 +73,7 @@ late FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin;
 /// First function to initialize the application, invoked automatically.
 ///
 /// **params**:
-/// None
+///   None
 ///
 /// **returns**:
 /// * `Future<void>`: resolves if the application was successfully initialized.
@@ -201,7 +201,7 @@ class _MyAppState extends State<MyApp> {
   /// It allows to manage and interact with the application’s home screen quick actions.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   ///   None
@@ -333,7 +333,7 @@ class DemoViewModel extends BaseModel {
 /// Set up firebase instance, enbables messaging,listens to icoming messages.
 ///
 /// **params**:
-/// None
+///   None
 ///
 /// **returns**:
 /// * `Future<void>`: promise that will be fulfilled Firebase is setted up.

lib/models/post/post_model.dart

@@ -78,7 +78,7 @@ class Post {
   /// this is to get duration of post.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   /// * `String`: date is returned in ago form.
@@ -117,7 +117,7 @@ class LikedBy {
   /// Convert dart object to json.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   /// * `Map<String, dynamic>`: json is returned.
@@ -151,7 +151,7 @@ class Comments {
   /// Convert dart object to json.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   /// * `Map<String, dynamic>`: json is returned.

lib/services/event_service.dart

@@ -51,7 +51,7 @@ class EventService {
   /// This function is used to set stream subscription for an organization.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   ///   None
@@ -65,7 +65,7 @@ class EventService {
   /// This function is used to fetch all the events of an organization.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   /// * `Future<void>`: void
@@ -184,7 +184,7 @@ class EventService {
   /// This function is used to cancel the stream subscription of an organization.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   ///   None

lib/utils/post_queries.dart

@@ -43,7 +43,7 @@ class PostQueries {
   /// Add Like to a post.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   /// * `String`: The query related to addingLike
@@ -61,7 +61,7 @@ class PostQueries {
   /// Remove Like from a post.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   /// * `String`: The query related to removingLike
@@ -82,7 +82,7 @@ class PostQueries {
   /// Upload a post to database.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   /// * `String`: The query related to uploadingPost.

lib/view_model/after_auth_view_models/add_post_view_models/add_post_view_model.dart

@@ -72,7 +72,7 @@ class AddPostViewModel extends BaseModel {
   /// This function is usedto do initialisation of stuff in the view model.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   ///   None
@@ -110,7 +110,7 @@ class AddPostViewModel extends BaseModel {
   /// This function uploads the post finally, and navigate the success message or error message in Snack Bar.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   /// * `Future<void>`: Uploading post by contacting queries
@@ -146,7 +146,7 @@ class AddPostViewModel extends BaseModel {
   /// This function removes the image selected.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   ///   None

lib/view_model/after_auth_view_models/event_view_models/create_event_view_model.dart

@@ -116,7 +116,7 @@ class CreateEventViewModel extends BaseModel {
   /// Function To Initialize.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   ///   None
@@ -134,7 +134,7 @@ class CreateEventViewModel extends BaseModel {
   /// for creating an event and passes the required variables for the event.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   /// * `Future<void>`: Asynchronous function for creating event
@@ -224,7 +224,7 @@ class CreateEventViewModel extends BaseModel {
   /// This function remove the selected image.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   ///   None
@@ -236,7 +236,7 @@ class CreateEventViewModel extends BaseModel {
   /// This function fetch all the users in the current organization and return `List`.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   /// * `Future<List<User>>`: Current Organization Users List
@@ -258,7 +258,7 @@ class CreateEventViewModel extends BaseModel {
   /// This function build the user list.
   ///
   /// **params**:
-  /// None
+  ///   None
   ///
   /// **returns**:
   ///   None

talawa_lint/lib/helpers.dart

@@ -2,6 +2,7 @@ import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/syntactic_entity.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/element/element.dart';
+import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/error/listener.dart';
 import 'package:custom_lint_builder/custom_lint_builder.dart';
 
@@ -138,3 +139,27 @@ bool isMethod(ClassMember m) => m is MethodDeclaration;
 bool isPrivate(Token? name) =>
     // ignore: avoid_bool_literals_in_conditional_expressions
     name != null ? Identifier.isPrivateName(name.lexeme) : false;
+
+class TalawaLintHelpers {
+  static bool isVoid(Declaration node) {
+    return ((node is FunctionDeclaration)
+            ? node.returnType?.type!.isVoid
+            : (node as MethodDeclaration).returnType?.type!.isVoid) ??
+        true;
+  }
+
+  static bool isImplicitReturn(Declaration node) {
+    return ((node is FunctionDeclaration)
+            ? node.declaredElement?.hasImplicitReturnType
+            : (node as MethodDeclaration)
+                .declaredElement
+                ?.hasImplicitReturnType) ??
+        false;
+  }
+
+  static DartType? returnType(Declaration node) {
+    return (node is FunctionDeclaration)
+        ? node.returnType?.type
+        : (node as MethodDeclaration).returnType?.type;
+  }
+}

talawa_lint/lib/talawa_api_doc/talawa_api_doc.dart

@@ -0,0 +1,78 @@
+import 'package:analyzer/error/listener.dart';
+import 'package:custom_lint_builder/custom_lint_builder.dart';
+import 'package:talawa_lint/talawa_api_doc/talawa_api_doc_fixer.dart';
+import 'package:talawa_lint/talawa_api_doc/talawa_api_doc_visitor.dart';
+
+class TalawaApiDocLintRule extends DartLintRule {
+  const TalawaApiDocLintRule() : super(code: _code);
+
+  /// Metadata about the warning that will show-up in the IDE.
+  /// This is used for `// ignore: code` and enabling/disabling the lint
+  static const _code = LintCode(
+    name: 'talawa_api_doc',
+    problemMessage: 'No documentation found for this field.',
+    correctionMessage: "Add a valid documentation describing usecase.",
+    url: "https://docs.talawa.io/docs/developers/talawa/talawa-lint/",
+  );
+
+  @override
+  void run(
+    CustomLintResolver resolver,
+    ErrorReporter reporter,
+    CustomLintContext context,
+  ) {
+    final visitor = TalawaApiDocVisitor(
+      this,
+      context,
+      reporter,
+    );
+
+    context.registry.addClassDeclaration(
+      (node) => node.visitChildren(visitor),
+    );
+    context.registry.addClassTypeAlias(
+      (node) => node.visitChildren(visitor),
+    );
+    context.registry.addCompilationUnit(
+      (node) => node.visitChildren(visitor),
+    );
+    context.registry.addConstructorDeclaration(
+      (node) => node.visitChildren(visitor),
+    );
+    context.registry.addEnumConstantDeclaration(
+      (node) => node.visitChildren(visitor),
+    );
+    context.registry.addEnumDeclaration(
+      (node) => node.visitChildren(visitor),
+    );
+    context.registry.addExtensionDeclaration(
+      (node) => node.visitChildren(visitor),
+    );
+    context.registry.addFieldDeclaration(
+      (node) => node.visitChildren(visitor),
+    );
+    context.registry.addFunctionDeclaration(
+      (node) => visitor.check(node),
+    );
+    context.registry.addFunctionTypeAlias(
+      (node) => node.visitChildren(visitor),
+    );
+    context.registry.addGenericTypeAlias(
+      (node) => node.visitChildren(visitor),
+    );
+    context.registry.addMixinDeclaration(
+      (node) => node.visitChildren(visitor),
+    );
+    context.registry.addVariableDeclaration(
+      (node) => node.visitChildren(visitor),
+    );
+    context.registry.addTopLevelVariableDeclaration(
+      (node) => node.visitChildren(visitor),
+    );
+  }
+
+  @override
+  List<Fix> getFixes() => [
+        TalawaAPIDocFixer(),
+      ];
+}