Integrating Online Wallet into Chrome.

chrome/browser/autofill/wallet/wallet_client.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_AUTOFILL_WALLET_WALLET_CLIENT_H_
+#define CHROME_BROWSER_AUTOFILL_WALLET_WALLET_CLIENT_H_
+
+#include <string>
+#include <vector>
+
+#include "base/memory/ref_counted.h"
+#include "net/url_request/url_fetcher_delegate.h"
+
+class GURL;
+
+namespace net {
+class URLRequestContextGetter;
+class URLFetcher;
+}
+
+namespace wallet {
+
+class Address;
+class Cart;
+class FullWallet;
+class WalletItems;
+
+// WalletClient is responsible for making calls to the Online Wallet backend on
+// the user's behalf.
+class WalletClient : public net::URLFetcherDelegate {
+ public:
+  // WalletClientObserver is to be implemented any classes making calls with
+  // WalletClient. The appropriate callback method will be called on
+  // WalletClientObserver with the response from the Online Wallet backend.
+  class WalletClientObserver {
+   public:
+    // Called when an AcceptLegalDocuments request finishes successfully.
+    virtual void OnAcceptLegalDocuments() = 0;
+
+    // Called when an EncryptOtp request finishes successfully.
+    virtual void OnEncryptOtp(const std::string& encrypted_otp,
+                              const std::string& session_material) = 0;
+
+    // Called when a GetFullWallet request finishes successfully. Caller owns
+    // the input pointer.
+    virtual void OnGetFullWallet(FullWallet* full_wallet) = 0;
+
+    // Called when a GetWalletItems request finishes successfully. Caller owns
+    // the input pointer.
+    virtual void OnGetWalletItems(WalletItems* wallet_items) = 0;
+
+    // Called when a SendExtendedAutofillStatus request finishes successfully.
+    virtual void OnSendExtendedAutofillStatus() = 0;
+
+    // TODO(ahutter): This is going to need more arguments, probably an error
+    // code and a message for the user.
+    // Called when a request fails due to an Online Wallet error.
+    virtual void OnWalletError() = 0;
+
+    // Called when a request fails due to a network error or if the response was
+    // invalid.
+    virtual void OnNetworkError(int response_code) = 0;
+
+   protected:
+    virtual ~WalletClientObserver() {}
+  };
+  explicit WalletClient(net::URLRequestContextGetter* context_getter);
+  virtual ~WalletClient();
+
+  // GetWalletItems retrieves the user's online wallet. The WalletItems
+  // returned may require additional action such as presenting legal documents
+  // to the user to be accepted.
+  void GetWalletItems(WalletClientObserver* observer);
+
+  // The GetWalletItems call to the Online Wallet backend may require the user
+  // to accept various legal documents before a FullWallet can be generated.
+  // The |document_ids| and |google_transaction_id| are provided in the response
+  // to the GetWalletItems call.
+  void AcceptLegalDocuments(const std::vector<std::string>& document_ids,
+                            const std::string& google_transaction_id,
+                            WalletClientObserver* observer);
+
+  // Before calling GetFullWallet, the client must encrypt a one time pad,
+  // |otp|, of crytographically secure random bytes. These bytes must be
+  // generated using crypto/random.h.
+  void EncryptOtp(const void* otp,
+                  size_t length,
+                  WalletClientObserver* observer);
+
+  // GetFullWallet retrieves the a FullWallet for the user. |instrument_id| and
+  // |adddress_id| should have been selected by the user in some UI,
+  // |merchant_domain| should come from the BrowserContext, the |cart|
+  // information will have been provided by the browser, |google_transaction_id|
+  // is the same one that GetWalletItems returns, and |encrypted_otp| and
+  // |session_material| are the results of the EncryptOtp call.
+  void GetFullWallet(const std::string& instrument_id,
+                     const std::string& address_id,
+                     const std::string& merchant_domain,
+                     const Cart& cart,
+                     const std::string& google_transaction_id,
+                     const std::string& encrypted_otp,
+                     const std::string& session_material,
+                     WalletClientObserver* observer);
+
+  // SendExtendedAutofillStatus is used for tracking the success of
+  // WalletClient. |success| is a flag for success, |merchant_domain| is the
+  // domain where the purchase occured, if the purchase was not successful
+  // |reason| is populated, and |google_transaction_id| is the same as the one
+  // provided by GetWalletItems.
+  void SendExtendedAutofillStatus(bool success,
+                                  const std::string& merchant_domain,
+                                  const std::string& reason,
+                                  const std::string& google_transaction_id,
+                                  WalletClientObserver* observer);
+
+ private:
+  // TODO(ahutter): Implement this.
+  std::string GetRiskParams() { return ""; }
+
+  enum RequestType {
+    NO_PENDING_REQUEST,
+    ACCEPT_LEGAL_DOCUMENTS,
+    ENCRYPT_OTP,
+    GET_FULL_WALLET,
+    GET_WALLET_ITEMS,
+    SEND_STATUS,
+  };
+
+  void MakeWalletRequest(const GURL& url,
+                         const std::string& post_body,
+                         WalletClient::WalletClientObserver* observer,
+                         const std::string& content_type);
+  virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
+
+  // The context for the request. Ensures the gdToken cookie is set as a header
+  // in the requests to Online Wallet if it is present.
+  scoped_refptr<net::URLRequestContextGetter> context_getter_;
+  // Observer class that has its various On* methods called based on the results
+  // of a request to Online Wallet.
+  WalletClientObserver* observer_;
+  // The current request object.
+  scoped_ptr<net::URLFetcher> request_;
+  // The type of the current request. Must be NO_PENDING_REQUEST for a request
+  // to be initiated as only one request may be running at a given time.
+  RequestType request_type_;
+  DISALLOW_COPY_AND_ASSIGN(WalletClient);
+};
+
+}  // namespace wallet
+
+#endif  // CHROME_BROWSER_AUTOFILL_WALLET_WALLET_CLIENT_H_
+