Some suggested improvements

.gitignore

@@ -29,47 +29,3 @@
 .pub-cache/
 .pub/
 build/
-
-# Android related
-**/android/**/gradle-wrapper.jar
-**/android/.gradle
-**/android/captures/
-**/android/gradlew
-**/android/gradlew.bat
-**/android/local.properties
-**/android/**/GeneratedPluginRegistrant.java
-
-# iOS/XCode related
-**/ios/**/*.mode1v3
-**/ios/**/*.mode2v3
-**/ios/**/*.moved-aside
-**/ios/**/*.pbxuser
-**/ios/**/*.perspectivev3
-**/ios/**/*sync/
-**/ios/**/.sconsign.dblite
-**/ios/**/.tags*
-**/ios/**/.vagrant/
-**/ios/**/DerivedData/
-**/ios/**/Icon?
-**/ios/**/Pods/
-**/ios/**/.symlinks/
-**/ios/**/profile
-**/ios/**/xcuserdata
-**/ios/.generated/
-**/ios/Flutter/App.framework
-**/ios/Flutter/Flutter.framework
-**/ios/Flutter/Flutter.podspec
-**/ios/Flutter/Generated.xcconfig
-**/ios/Flutter/app.flx
-**/ios/Flutter/app.zip
-**/ios/Flutter/flutter_assets/
-**/ios/Flutter/flutter_export_environment.sh
-**/ios/ServiceDefinitions.json
-**/ios/Runner/GeneratedPluginRegistrant.*
-
-# Exceptions to above rules.
-!**/ios/**/default.mode1v3
-!**/ios/**/default.mode2v3
-!**/ios/**/default.pbxuser
-!**/ios/**/default.perspectivev3
-!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages

README.md

@@ -1,6 +1,6 @@
 # auth0
 
-Flutter package for authentication using Auth0 API.Contains basic set of methods like passwordRealm, getUser, logout etc.
+Dart package for authentication using Auth0 API.Contains basic set of methods like passwordRealm, getUser, logout etc.
 
 ## Usage
 
@@ -12,14 +12,13 @@ Auth0Client(clientId, baseUrl,
 ## Available methods
 
 
-`updateToken` - Updates current access token for Auth0 connection  
-`authorizeUrl` - Builds the full authorize endpoint url in the Authorization Server (AS) with given parameters.  
-`passwordRealm` - Performs Auth with user credentials using the Password Realm Grant  
-`refreshToken` - Obtains new tokens using the Refresh Token obtained during Auth (requesting offline_access scope)  
-`getUserInfo` - Returns user information using an access token  
-`resetPassword` - Requests an email with instructions to change password of a user  
-`logout` - Makes logout API call  
-`createUser` - Performs creating user with specified values  
-`revoke` - Revokes an issued refresh token  
+`updateToken` - Updates current access token for Auth0 connection
+`authorizeUrl` - Builds the full authorize endpoint url in the Authorization Server (AS) with given parameters.
+`passwordRealm` - Performs Auth with user credentials using the Password Realm Grant
+`refreshToken` - Obtains new tokens using the Refresh Token obtained during Auth (requesting offline_access scope)
+`getUserInfo` - Returns user information using an access token
+`resetPassword` - Requests an email with instructions to change password of a user
+`logout` - Makes logout API call
+`createUser` - Performs creating user with specified values
+`revoke` - Revokes an issued refresh token
 `exchange` - Exchanges a code obtained via /authorize (w/PKCE) for the user's tokens
-

lib/data/auth0_client.dart

@@ -3,28 +3,33 @@ part of auth0;
 class Auth0Client {
   final DioWrapper dioWrapper = DioWrapper();
   final String clientId;
-  final String url;
+  final String clientSecret;
+  final String domain;
 
   int connectTimeout;
   int sendTimeout;
   int receiveTimeout;
 
-  Auth0Client(this.clientId, this.url,
-      {String accessToken,
-      this.connectTimeout,
-      this.sendTimeout,
-      this.receiveTimeout}) {
+  Auth0Client({
+    this.clientId,
+    this.clientSecret,
+    this.domain,
+    String accessToken,
+    this.connectTimeout,
+    this.sendTimeout,
+    this.receiveTimeout,
+  }) {
     assert(clientId != null);
-    assert(url != null);
+    assert(domain != null);
 
     dioWrapper.configure(
-        url, connectTimeout, sendTimeout, receiveTimeout, accessToken);
+        'https://$domain', connectTimeout, sendTimeout, receiveTimeout, accessToken);
   }
 
   /// Updates current access token for Auth0 connection
   void updateToken(String newAccessToken) {
     dioWrapper.configure(
-        url, connectTimeout, sendTimeout, receiveTimeout, newAccessToken);
+        'https://$domain', connectTimeout, sendTimeout, receiveTimeout, newAccessToken);
   }
 
   /// Builds the full authorize endpoint url in the Authorization Server (AS) with given parameters.
@@ -52,6 +57,31 @@ class Auth0Client {
     );
   }
 
+  /// Performs Auth with user credentials using the Password Realm Grant
+  /// [params] to send realm parameters
+  /// @param [String] params.username user's username or email
+  /// @param [String] params.password user's password
+  /// @param [String] params.realm name of the Realm where to Auth (or connection name)
+  /// @param [String] - [params.audience] identifier of Resource Server (RS) to be included as audience (aud claim) of the issued access token
+  /// @param [String] - [params.scope] scopes requested for the issued tokens. e.g. openid profile
+  /// @returns a [Future] with [Auth0User]
+  /// [ref link]: https://auth0.com/docs/api-auth/grant/password#realm-support
+  Future<Auth0User> passwordGrant(Map<String, String> params) async {
+    assert(params['username'] != null && params['password'] != null);
+
+    var payload = {
+      ...params,
+        'client_id': this.clientId,
+        'client_secret': this.clientSecret,
+        'grant_type': params['realm'] != null
+            ? 'http://auth0.com/oauth/grant-type/password-realm'
+            : 'password'
+      };
+
+    Response res = await dioWrapper.post('/oauth/token', body: payload);
+    return Auth0User.fromMap(res.data as Map);
+  }
+
   /// Performs Auth with user credentials using the Password Realm Grant
   /// [params] to send realm parameters
   /// @param [String] params.username user's username or email

lib/data/network/dio_wrapper.dart

@@ -65,7 +65,6 @@ class DioWrapper {
   /// take [url], concrete route
   Future<Response> post(String url, {Map headers, body, encoding}) async =>
       await dio.post(url, data: body).then((response) {
-        print(response);
         return response;
       }).catchError((error) {
         handleError(error, _decoder);

lib/domain/user_info.dart

@@ -8,13 +8,13 @@ class Auth0User {
   DateTime expiresDate;
   String tokenType;
 
-  Auth0User.fromMap(Map<dynamic, dynamic> snapshot)
+  Auth0User.fromMap(Map snapshot)
       : accessToken = snapshot['access_token'],
         refreshToken = snapshot['refresh_token'],
         idToken = snapshot['id_token'],
         scope = snapshot['scope'],
         expiresDate =
-            DateTime.now().add(Duration(seconds: snapshot['expires_in'] = 0)),
+            DateTime.now().add(Duration(seconds: snapshot['expires_in'] ?? 0)),
         tokenType = snapshot['token_type'];
 
   Map<String, dynamic> toJson() {
@@ -23,7 +23,7 @@ class Auth0User {
       'refresh_token': refreshToken,
       'id_token': idToken,
       'scope': scope,
-      'expires_in': expiresDate,
+      'expires_in': expiresDate.difference(DateTime.now()).inSeconds,
       'token_type': tokenType
     };
   }

pubspec.lock

@@ -1,34 +1,6 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
-  archive:
-    dependency: transitive
-    description:
-      name: archive
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.11"
-  args:
-    dependency: transitive
-    description:
-      name: args
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.5.2"
-  async:
-    dependency: transitive
-    description:
-      name: async
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.4.0"
-  boolean_selector:
-    dependency: transitive
-    description:
-      name: boolean_selector
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.5"
   charcode:
     dependency: transitive
     description:
@@ -43,58 +15,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.14.11"
-  convert:
-    dependency: transitive
-    description:
-      name: convert
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.1"
-  crypto:
-    dependency: transitive
-    description:
-      name: crypto
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.3"
   dio:
     dependency: "direct main"
     description:
       name: dio
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.0.9"
-  flutter:
-    dependency: "direct main"
-    description: flutter
-    source: sdk
-    version: "0.0.0"
-  flutter_test:
-    dependency: "direct dev"
-    description: flutter
-    source: sdk
-    version: "0.0.0"
   http_parser:
     dependency: transitive
     description:
       name: http_parser
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.1.3"
-  image:
-    dependency: transitive
-    description:
-      name: image
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.4"
-  matcher:
-    dependency: transitive
-    description:
-      name: matcher
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.12.6"
   meta:
     dependency: transitive
     description:
@@ -109,53 +43,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.6.4"
-  pedantic:
-    dependency: transitive
-    description:
-      name: pedantic
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.8.0+1"
-  petitparser:
-    dependency: transitive
-    description:
-      name: petitparser
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.4.0"
-  quiver:
-    dependency: transitive
-    description:
-      name: quiver
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.5"
-  sky_engine:
-    dependency: transitive
-    description: flutter
-    source: sdk
-    version: "0.0.99"
   source_span:
     dependency: transitive
     description:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.5.5"
-  stack_trace:
-    dependency: transitive
-    description:
-      name: stack_trace
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.9.3"
-  stream_channel:
-    dependency: transitive
-    description:
-      name: stream_channel
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.0"
   string_scanner:
     dependency: transitive
     description:
@@ -170,33 +64,12 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.0"
-  test_api:
-    dependency: transitive
-    description:
-      name: test_api
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.11"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.6"
-  vector_math:
-    dependency: transitive
-    description:
-      name: vector_math
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.8"
-  xml:
-    dependency: transitive
-    description:
-      name: xml
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "3.5.0"
 sdks:
-  dart: ">2.4.0 <3.0.0"
+  dart: ">=2.8.0 <3.0.0"