Add RealPanWalletClient for handling card unmasking requests.

components/autofill/core/browser/wallet/real_pan_wallet_client.cc

Index: components/autofill/core/browser/wallet/real_pan_wallet_client.cc
diff --git a/components/autofill/core/browser/wallet/real_pan_wallet_client.cc b/components/autofill/core/browser/wallet/real_pan_wallet_client.cc
new file mode 100644
index 0000000000000000000000000000000000000000..ab6367457dfd78ad6ecdce9394a6ed4bfed84c00
--- /dev/null
+++ b/components/autofill/core/browser/wallet/real_pan_wallet_client.cc
@@ -0,0 +1,122 @@
+// Copyright 2015 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.
+
+#include "components/autofill/core/browser/wallet/real_pan_wallet_client.h"
+
+#include "base/bind.h"
+#include "base/json/json_reader.h"
+#include "base/json/json_writer.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/strings/stringprintf.h"
+#include "base/values.h"
+#include "net/base/escape.h"
+#include "net/http/http_status_code.h"
+#include "net/url_request/url_fetcher.h"
+#include "net/url_request/url_request_context_getter.h"
+
+namespace autofill {
+namespace wallet {
+
+namespace {
+
+const char kUnmaskCardRequestFormat[] =
+    "request_content_type=application/json&request=%s&cvc=%s";
+
+// TODO(estade): use a sandbox server on dev builds?
+const char kUnmaskCardRequestUrl[] =
+    "https://wallet.google.com/payments/apis-secure/creditcardservice"
+    "/GetRealPan?s7e=cvc";
+
+}  // namespace
+
+RealPanWalletClient::RealPanWalletClient(
+    net::URLRequestContextGetter* context_getter,
+    Delegate* delegate)
+    : context_getter_(context_getter),
+      delegate_(delegate),
+      weak_ptr_factory_(this) {
+  DCHECK(delegate);
+}
+
+RealPanWalletClient::~RealPanWalletClient() {
+}
+
+void RealPanWalletClient::UnmaskCard(const CreditCard& card,
+                                     const std::string& cvc) {
+  request_.reset(net::URLFetcher::Create(
+      0, GURL(kUnmaskCardRequestUrl), net::URLFetcher::POST, this));
+  request_->SetRequestContext(context_getter_.get());
+
+  base::DictionaryValue request_dict;
+  request_dict.SetString("encrypted_cvc", "__param:cvc");
+  // TODO(estade): get the token from |card|.
+  request_dict.SetString("credit_card_token", "deadbeefee");
+  std::string json_request;
+  base::JSONWriter::Write(&request_dict, &json_request);
+  std::string post_body = base::StringPrintf(kUnmaskCardRequestFormat,
+      net::EscapeUrlEncodedData(json_request, true).c_str(),
+      net::EscapeUrlEncodedData(cvc, true).c_str());
+  request_->SetUploadData("application/x-www-form-urlencoded", post_body);
+
+  request_->AddExtraRequestHeader(
+      "Authorization: " + delegate_->GetOAuth2Token());
+  request_->Start();
+}
+
+void RealPanWalletClient::CancelRequest() {
+  request_.reset();
+}
+
+void RealPanWalletClient::OnURLFetchComplete(const net::URLFetcher* source) {
+  DCHECK_EQ(source, request_.get());
+
+  // |request_|, which is aliased to |source|, might continue to be used in this
+  // |method, but should be freed once control leaves the method.
+  scoped_ptr<net::URLFetcher> scoped_request(request_.Pass());
+  scoped_ptr<base::DictionaryValue> response_dict;
+  int response_code = source->GetResponseCode();
+
+  switch (response_code) {
+    // Valid response.
+    case net::HTTP_OK: {
+      std::string data;
+      source->GetResponseAsString(&data);
+      scoped_ptr<base::Value> message_value(base::JSONReader::Read(data));
+      if (message_value.get() &&
+          message_value->IsType(base::Value::TYPE_DICTIONARY)) {
+        response_dict.reset(
+            static_cast<base::DictionaryValue*>(message_value.release()));
+      } else {
+        NOTIMPLEMENTED();
+      }
+      break;
+    }
+
+    // HTTP_BAD_REQUEST means the arguments are invalid. No point retrying.
+    case net::HTTP_BAD_REQUEST: {
+      NOTIMPLEMENTED();
+      break;
+    }
+
+    // Response contains an error to show the user.
+    case net::HTTP_FORBIDDEN:
+    case net::HTTP_INTERNAL_SERVER_ERROR: {
+      NOTIMPLEMENTED();
+      break;
+    }
+
+    // Handle anything else as a generic error.
+    default:
+      NOTIMPLEMENTED();
+      break;
+  }
+
+  std::string real_pan;
+  if (response_dict)
+    response_dict->GetString("pan", &real_pan);
+  delegate_->OnDidGetRealPan(real_pan);
+}
+
+}  // namespace wallet
+}  // namespace autofill