fileSystemProvider: First cut at implementing fileSystemProvider API

chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.cc

Index: chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.cc
diff --git a/chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.cc b/chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0d9fc0dd5d06f3c22357c0fa5b50f9d9bbd1d1e1
--- /dev/null
+++ b/chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.cc
@@ -0,0 +1,63 @@
+// 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.
+
+#include "chrome/browser/chromeos/extensions/file_system_provider/file_system_provider_api.h"
+
+#include "chrome/common/extensions/api/file_system_provider.h"
+
+namespace extensions {
+
+namespace {
+
+// Error names from
+// http://www.w3.org/TR/file-system-api/#errors-and-exceptions
+const char kSecurityErrorName[] = "SecurityError";
+
+// Error messages.
+const char kEmptyNameErrorMessage[] = "Empty display name is not allowed";
+
+// Creates a dictionary, which looks like a DOMError. The returned dictionary
+// will be converted to a real DOMError object in
+// file_system_provier_custom_bindings.js.
+base::DictionaryValue* CreateError(const std::string& name,
+                                   const std::string& message) {
+  base::DictionaryValue* error = new base::DictionaryValue();
+  error->SetString("name", name);
+  error->SetString("message", message);
+  return error;
+}
+
+}  // namespace
+
+bool FileSystemProviderMountFunction::RunImpl() {
+  using extensions::api::file_system_provider::Mount::Params;
+  const scoped_ptr<Params> params(Params::Create(*args_));
+  EXTENSION_FUNCTION_VALIDATE(params);
+
+  // It's an error if the display name is empty.
+  if (params->display_name.empty()) {
+    const std::string file_system_id = "";
+
+    base::ListValue* result = new base::ListValue();
+    result->Append(new base::StringValue(file_system_id));
+    result->Append(CreateError(kSecurityErrorName,
+                               kEmptyNameErrorMessage));
+    SetResult(result);
+    SendResponse(true);
+    return true;
+  }
+
+  // TODO(satorux): Implement the real logic.
+  const std::string file_system_id = params->display_name;
+
+  base::ListValue* result = new base::ListValue();
+  result->Append(new base::StringValue(file_system_id));
+  // Don't append an error on success.
+
+  SetResult(result);
+  SendResponse(true);
+  return true;
+}
+
+}  // namespace extensions