Identity API: getAuthToken request queues (token cache prelude)

chrome/browser/extensions/api/identity/identity_api.h

 // Copyright (c) 2012 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_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_
 
+#include <map>
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
+#include "chrome/browser/extensions/api/identity/identity_mint_queue.h"
 #include "chrome/browser/extensions/api/identity/identity_signin_flow.h"
 #include "chrome/browser/extensions/api/identity/web_auth_flow.h"
 #include "chrome/browser/extensions/api/profile_keyed_api_factory.h"
 #include "chrome/browser/extensions/extension_function.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/signin/signin_global_error.h"
 #include "google_apis/gaia/oauth2_mint_token_flow.h"
 
 class GetAuthTokenFunctionTest;
 class MockGetAuthTokenFunction;
 class GoogleServiceAuthError;
 class Profile;
 
 namespace extensions {
 
 namespace identity_constants {
 extern const char kInvalidClientId[];
 extern const char kInvalidScopes[];
 extern const char kAuthFailure[];
 extern const char kNoGrant[];
 extern const char kUserRejected[];
 extern const char kUserNotSignedIn[];
 extern const char kInteractionRequired[];
 extern const char kInvalidRedirect[];
 }  // namespace identity_constants
 
+// identity.getAuthToken fetches an OAuth 2 function for the
+// caller. The request has three sub-flows: non-interactive,
+// interactive, and sign-in.
+//
+// In the non-interactive flow, getAuthToken requests a token from
+// GAIA. GAIA may respond with a token, an error, or "consent
+// required". In the consent required cases, getAuthToken proceeds to
+// the second, interactive phase.
+//
+// The interactive flow presents a scope approval dialog to the
+// user. If the user approves the request, a grant will be recorded on
+// the server, and an access token will be returned to the caller.
+//
+// In some cases we need to display a sign-in dialog. Normally the
+// profile will be signed in already, but if it turns out we need a
+// new login token, there is a sign-in flow. If that flow completes
+// successfully, getAuthToken proceeds to the non-interactive flow.
 class IdentityGetAuthTokenFunction : public AsyncExtensionFunction,
+                                     public ExtensionInstallPrompt::Delegate,
+                                     public IdentityMintRequestQueue::Request,
                                      public OAuth2MintTokenFlow::Delegate,
-                                     public ExtensionInstallPrompt::Delegate,
                                      public IdentitySigninFlow::Delegate {
  public:
   DECLARE_EXTENSION_FUNCTION("experimental.identity.getAuthToken",
                              EXPERIMENTAL_IDENTITY_GETAUTHTOKEN)
 
   IdentityGetAuthTokenFunction();
 
  protected:
   virtual ~IdentityGetAuthTokenFunction();
 
  private:
   friend class GetAuthTokenFunctionTest;
   friend class MockGetAuthTokenFunction;
 
   // ExtensionFunction:
   virtual bool RunImpl() OVERRIDE;
 
+  // Helpers to report async function results to the caller.
+  void CompleteFunctionWithResult(const std::string& access_token);
+  void CompleteFunctionWithError(const std::string& error);
+
+  // Initiate/complete the sub-flows.
+  void StartSigninFlow();
+  void StartMintTokenFlow(IdentityMintRequestQueue::MintType type);
+  void CompleteMintTokenFlow();
+
+  // IdentityMintRequestQueue::Request implementation:
+  virtual void StartMintToken(IdentityMintRequestQueue::MintType type) OVERRIDE;
+
   // OAuth2MintTokenFlow::Delegate implementation:
   virtual void OnMintTokenSuccess(const std::string& access_token) OVERRIDE;
   virtual void OnMintTokenFailure(
       const GoogleServiceAuthError& error) OVERRIDE;
   virtual void OnIssueAdviceSuccess(
       const IssueAdviceInfo& issue_advice) OVERRIDE;
 
   // IdentitySigninFlow::Delegate implementation:
   virtual void SigninSuccess(const std::string& token) OVERRIDE;
   virtual void SigninFailed() OVERRIDE;
 
   // ExtensionInstallPrompt::Delegate implementation:
   virtual void InstallUIProceed() OVERRIDE;
   virtual void InstallUIAbort(bool user_initiated) OVERRIDE;
 
-  // Starts a MintTokenFlow with the given mode.
-  void StartFlow(OAuth2MintTokenFlow::Mode mode);
+  // Starts a mint token request to GAIA.
+  void StartGaiaRequest(OAuth2MintTokenFlow::Mode mode);
 
+  // Methods for invoking UI. Overridable for testing.
   virtual void ShowLoginPopup();
   virtual void ShowOAuthApprovalDialog(const IssueAdviceInfo& issue_advice);
   // Caller owns the returned instance.
   virtual OAuth2MintTokenFlow* CreateMintTokenFlow(
       OAuth2MintTokenFlow::Mode mode);
 
   // Checks if there is a master login token to mint tokens for the extension.
   virtual bool HasLoginToken() const;
 
   bool should_prompt_for_scopes_;
+  IdentityMintRequestQueue::MintType mint_token_flow_type_;
   scoped_ptr<OAuth2MintTokenFlow> mint_token_flow_;
   std::string refresh_token_;
   bool should_prompt_for_signin_;
 
   // When launched in interactive mode, and if there is no existing grant,
   // a permissions prompt will be popped up to the user.
+  IssueAdviceInfo issue_advice_;
   scoped_ptr<ExtensionInstallPrompt> install_ui_;
   scoped_ptr<IdentitySigninFlow> signin_flow_;
 };
 
 class IdentityLaunchWebAuthFlowFunction : public AsyncExtensionFunction,
                                           public WebAuthFlow::Delegate {
  public:
   DECLARE_EXTENSION_FUNCTION("experimental.identity.launchWebAuthFlow",
                              EXPERIMENTAL_IDENTITY_LAUNCHWEBAUTHFLOW)
 
@@ skipping 22 matching lines @@
 };
 
 class IdentityAPI : public ProfileKeyedAPI,
                     public SigninGlobalError::AuthStatusProvider,
                     public content::NotificationObserver {
  public:
   explicit IdentityAPI(Profile* profile);
   virtual ~IdentityAPI();
   void Initialize();
 
+  // Request serialization queue for getAuthToken.
+  IdentityMintRequestQueue* mint_queue();
+
   void ReportAuthError(const GoogleServiceAuthError& error);
 
   // ProfileKeyedAPI implementation.
   virtual void Shutdown() OVERRIDE;
   static ProfileKeyedAPIFactory<IdentityAPI>* GetFactoryInstance();
 
   // AuthStatusProvider implementation.
   virtual GoogleServiceAuthError GetAuthStatus() const OVERRIDE;
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
  private:
   friend class ProfileKeyedAPIFactory<IdentityAPI>;
 
   // ProfileKeyedAPI implementation.
   static const char* service_name() {
     return "IdentityAPI";
   }
   static const bool kServiceIsNULLWhileTesting = true;
 
   Profile* profile_;
   SigninManager* signin_manager_;
   GoogleServiceAuthError error_;
   // Used to listen to notifications from the TokenService.
   content::NotificationRegistrar registrar_;
+  IdentityMintRequestQueue mint_queue_;
 };
 
 template <>
 void ProfileKeyedAPIFactory<IdentityAPI>::DeclareFactoryDependencies();
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_IDENTITY_IDENTITY_API_H_