dart - allow setting an accessToken for oauth

modules/swagger-codegen/src/main/resources/dart/api_client.mustache

@@ -14,15 +14,16 @@ class ApiClient {
 
   Map<String, String> _defaultHeaderMap = {};
   Map<String, Authentication> _authentications = {};
+  String accessToken;
 
   final _RegList = new RegExp(r'^List<(.*)>$');
   final _RegMap = new RegExp(r'^Map<String,(.*)>$');
 
-  ApiClient({this.basePath: "{{{basePath}}}"}) {
+  ApiClient({this.basePath: "{{{basePath}}}", this.accessToken}) {
     // Setup authentications (key: authentication name, value: authentication).{{#authMethods}}{{#isBasic}}
     _authentications['{{name}}'] = new HttpBasicAuth();{{/isBasic}}{{#isApiKey}}
     _authentications['{{name}}'] = new ApiKeyAuth({{#isKeyInHeader}}"header"{{/isKeyInHeader}}{{^isKeyInHeader}}"query"{{/isKeyInHeader}}, "{{keyParamName}}");{{/isApiKey}}{{#isOAuth}}
-    _authentications['{{name}}'] = new OAuth();{{/isOAuth}}{{/authMethods}}
+    _authentications['{{name}}'] = new OAuth(accessToken: this.accessToken);{{/isOAuth}}{{/authMethods}}
   }
 
   void addDefaultHeader(String key, String value) {
@@ -153,4 +154,13 @@ class ApiClient {
       auth.applyToParams(queryParams, headerParams);
     });
   }
+
+  void setAccessToken(String accessToken) {
+    this.accessToken = accessToken;
+    _authentications.forEach((key, auth) {
+      if (auth is OAuth) {
+        auth.setAccessToken(accessToken);
+      }
+    });
+  }
 }

modules/swagger-codegen/src/main/resources/dart/auth/oauth.mustache

@@ -1,9 +1,19 @@
 part of {{pubName}}.api;
 
 class OAuth implements Authentication {
+  String accessToken;
+
+  OAuth({this.accessToken}) {
+  }
 
   @override
   void applyToParams(List<QueryParam> queryParams, Map<String, String> headerParams) {
-    // TODO: support oauth
+    if (accessToken != null) {
+      headerParams["Authorization"] = "Bearer " + accessToken;
+    }
+  }
+
+  void setAccessToken(String accessToken) {
+    this.accessToken = accessToken;
   }
 }