Move API flows for cloud print into common class CloudPrintBaseApiFlow

chrome/browser/local_discovery/cloud_print_base_api_flow.h

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_LOCAL_DISCOVERY_CLOUD_PRINT_BASE_API_FLOW_H_
+#define CHROME_BROWSER_LOCAL_DISCOVERY_CLOUD_PRINT_BASE_API_FLOW_H_
+
+#include <string>
+
+#include "chrome/browser/local_discovery/privet_constants.h"
+#include "chrome/browser/local_discovery/privet_http.h"
+#include "google_apis/gaia/oauth2_token_service.h"
+#include "net/url_request/url_fetcher.h"
+#include "net/url_request/url_fetcher_delegate.h"
+#include "net/url_request/url_request_context_getter.h"
+
+namespace local_discovery {
+
+// API call flow for communicating with cloud print.
+class CloudPrintBaseApiFlow : public net::URLFetcherDelegate,
+                              public OAuth2TokenService::Consumer {
+ public:
+  // TODO(noamsml): Better error model for this class.
+  enum Status {
+    SUCCESS,
+    ERROR_TOKEN,
+    ERROR_NETWORK,
+    ERROR_HTTP_CODE,
+    ERROR_FROM_SERVER,
+    ERROR_MALFORMED_RESPONSE
+  };
+
+  class Delegate {
+   public:
+    virtual ~Delegate() {}
+
+    virtual void OnCloudPrintAPIFlowError(CloudPrintBaseApiFlow* flow,
+                                          Status status) = 0;
+    virtual void OnCloudPrintAPIFlowComplete(
+        CloudPrintBaseApiFlow* flow,
+        const base::DictionaryValue* value) = 0;
+  };
+
+  // Create an OAuth2-based confirmation.
+  CloudPrintBaseApiFlow(net::URLRequestContextGetter* request_context,
+                        OAuth2TokenService* token_service_,
+                        const GURL& automated_claim_url,
+                        Delegate* delegate);
+
+  // Create a cookie-based confirmation.
+  CloudPrintBaseApiFlow(net::URLRequestContextGetter* request_context,
+                        int  user_index,
+                        const std::string& xsrf_token,
+                        const GURL& automated_claim_url,
+                        Delegate* delegate);
+
+  // Create a cookie-based confirmation with no XSRF token (for requests that
+  // don't need an XSRF token).
+  CloudPrintBaseApiFlow(net::URLRequestContextGetter* request_context,
+                        int  user_index,
+                        const GURL& automated_claim_url,
+                        Delegate* delegate);
+
+
+  virtual ~CloudPrintBaseApiFlow();
+
+  void Start();
+
+
+  // net::URLFetcherDelegate implementation:
+  virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
+
+  // OAuth2TokenService::Consumer implementation:
+  virtual void OnGetTokenSuccess(const OAuth2TokenService::Request* request,
+                                 const std::string& access_token,
+                                 const base::Time& expiration_time) OVERRIDE;
+  virtual void OnGetTokenFailure(const OAuth2TokenService::Request* request,
+                                 const GoogleServiceAuthError& error) OVERRIDE;
+
+ private:
+  bool UseOAuth2() { return token_service_ != NULL; }
+
+  void CreateRequest(const GURL& url);
+
+  scoped_ptr<net::URLFetcher> url_fetcher_;
+  scoped_ptr<OAuth2TokenService::Request> oauth_request_;
+  scoped_refptr<net::URLRequestContextGetter> request_context_;
+  OAuth2TokenService* token_service_;
+  int user_index_;
+  std::string xsrf_token_;
+  GURL url_;
+  Delegate* delegate_;
+};
+
+}  // namespace local_discovery
+
+#endif  // CHROME_BROWSER_LOCAL_DISCOVERY_CLOUD_PRINT_BASE_API_FLOW_H_