[fsp] Add requestUnmount() method together with the request manager.

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

 // 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 <string>
+
+#include "base/values.h"
 #include "chrome/browser/chromeos/file_system_provider/service.h"
 #include "chrome/common/extensions/api/file_system_provider.h"
+#include "chrome/common/extensions/api/file_system_provider_internal.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.";
-const char kRegisteringFailedErrorMessage[] =
-    "Registering the file system failed.";
+const char kMountFailedErrorMessage[] = "Mounting the file system failed.";
+const char kUnmountFailedErrorMessage[] = "Unmounting the file system failed.";
+const char kResponseFailedErrorMessage[] =
+    "Sending a response for the request failed.";
 
 // 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;
 }
 
+// Converts ProviderError to base::File::Error. This could be redundant, if it
+// was possible to create DOMError instances in Javascript easily.
+base::File::Error ProviderErrorToFileError(
+    api::file_system_provider::ProviderError error) {
+  switch (error) {
+    case api::file_system_provider::PROVIDER_ERROR_OK:
+      return base::File::FILE_OK;
+    case api::file_system_provider::PROVIDER_ERROR_IN_USE:
+      return base::File::FILE_ERROR_IN_USE;
+    case api::file_system_provider::PROVIDER_ERROR_EXISTS:
+      return base::File::FILE_ERROR_EXISTS;
+    case api::file_system_provider::PROVIDER_ERROR_NOT_FOUND:
+      return base::File::FILE_ERROR_NOT_FOUND;
+    case api::file_system_provider::PROVIDER_ERROR_ACCESS_DENIED:
+      return base::File::FILE_ERROR_ACCESS_DENIED;
+    case api::file_system_provider::PROVIDER_ERROR_TOO_MANY_OPENED:
+      return base::File::FILE_ERROR_TOO_MANY_OPENED;
+    case api::file_system_provider::PROVIDER_ERROR_NO_MEMORY:
+      return base::File::FILE_ERROR_NO_MEMORY;
+    case api::file_system_provider::PROVIDER_ERROR_NO_SPACE:
+      return base::File::FILE_ERROR_NO_SPACE;
+    case api::file_system_provider::PROVIDER_ERROR_NOT_A_DIRECTORY:
+      return base::File::FILE_ERROR_NOT_A_DIRECTORY;
+    case api::file_system_provider::PROVIDER_ERROR_INVALID_OPERATION:
+      return base::File::FILE_ERROR_INVALID_OPERATION;
+    case api::file_system_provider::PROVIDER_ERROR_SECURITY:
+      return base::File::FILE_ERROR_SECURITY;
+    case api::file_system_provider::PROVIDER_ERROR_ABORT:
+      return base::File::FILE_ERROR_ABORT;
+    case api::file_system_provider::PROVIDER_ERROR_NOT_A_FILE:
+      return base::File::FILE_ERROR_NOT_A_FILE;
+    case api::file_system_provider::PROVIDER_ERROR_NOT_EMPTY:
+      return base::File::FILE_ERROR_NOT_EMPTY;
+    case api::file_system_provider::PROVIDER_ERROR_INVALID_URL:
+      return base::File::FILE_ERROR_INVALID_URL;
+    case api::file_system_provider::PROVIDER_ERROR_IO:
+      return base::File::FILE_ERROR_IO;
+    default:
+      NOTREACHED();
+  }
+  return base::File::FILE_ERROR_FAILED;
+}
+
 }  // namespace
 
 bool FileSystemProviderMountFunction::RunImpl() {
-  using extensions::api::file_system_provider::Mount::Params;
+  using 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()) {
     base::ListValue* result = new base::ListValue();
     result->Append(new base::StringValue(""));
     result->Append(CreateError(kSecurityErrorName,
                                kEmptyNameErrorMessage));
     SetResult(result);
     return false;
   }
 
   chromeos::file_system_provider::Service* service =
       chromeos::file_system_provider::Service::Get(GetProfile());
   DCHECK(service);
 
   int file_system_id =
-      service->RegisterFileSystem(extension_id(), params->display_name);
+      service->MountFileSystem(extension_id(), params->display_name);
 
   // If the |file_system_id| is zero, then it means that registering the file
   // system failed.
   // TODO(mtomasz): Pass more detailed errors, rather than just a bool.
   if (!file_system_id) {
     base::ListValue* result = new base::ListValue();
     result->Append(new base::FundamentalValue(0));
-    result->Append(
-        CreateError(kSecurityErrorName, kRegisteringFailedErrorMessage));
+    result->Append(CreateError(kSecurityErrorName, kMountFailedErrorMessage));
     SetResult(result);
     return false;
   }
 
   base::ListValue* result = new base::ListValue();
   result->Append(new base::FundamentalValue(file_system_id));
   // Don't append an error on success.
 
   SetResult(result);
   SendResponse(true);
   return true;
 }
 
+bool FileSystemProviderUnmountFunction::RunImpl() {
+  using api::file_system_provider::Unmount::Params;
+  const scoped_ptr<Params> params(Params::Create(*args_));
+  EXTENSION_FUNCTION_VALIDATE(params);
+
+  chromeos::file_system_provider::Service* service =
+      chromeos::file_system_provider::Service::Get(GetProfile());
+  DCHECK(service);
+
+  if (!service->UnmountFileSystem(extension_id(), params->file_system_id)) {
+    // TODO(mtomasz): Pass more detailed errors, rather than just a bool.
+    base::ListValue* result = new base::ListValue();
+    result->Append(CreateError(kSecurityErrorName, kUnmountFailedErrorMessage));
+    SetResult(result);
+    return false;
+  }
+
+  base::ListValue* result = new base::ListValue();
+  SetResult(result);
+  SendResponse(true);
+  return true;
+}
+
+bool FileSystemProviderInternalUnmountRequestedSuccessFunction::RunImpl() {
+  using api::file_system_provider_internal::UnmountRequestedSuccess::Params;
+  const scoped_ptr<Params> params(Params::Create(*args_));
+  EXTENSION_FUNCTION_VALIDATE(params);
+
+  chromeos::file_system_provider::Service* service =
+      chromeos::file_system_provider::Service::Get(GetProfile());
+  DCHECK(service);
+
+  if (!service->FulfillRequest(extension_id(),
+                               params->file_system_id,
+                               params->request_id,
+                               scoped_ptr<base::DictionaryValue>(),
+                               false /* has_more */)) {
+    // TODO(mtomasz): Pass more detailed errors, rather than just a bool.
+    base::ListValue* result = new base::ListValue();
+    result->Append(
+        CreateError(kSecurityErrorName, kResponseFailedErrorMessage));
+    SetResult(result);
+    return false;
+  }
+
+  base::ListValue* result = new base::ListValue();
+  SetResult(result);
+  SendResponse(true);
+  return true;
+}
+
+bool FileSystemProviderInternalUnmountRequestedErrorFunction::RunImpl() {
+  using api::file_system_provider_internal::UnmountRequestedError::Params;
+  const scoped_ptr<Params> params(Params::Create(*args_));
+  EXTENSION_FUNCTION_VALIDATE(params);
+
+  chromeos::file_system_provider::Service* service =
+      chromeos::file_system_provider::Service::Get(GetProfile());
+  DCHECK(service);
+
+  // Currently it is not possible to refer to types/enums defined in a different
+  // IDL file. Therefore we need to convert DOMString to ProviderError, since
+  // UnmountRequestedErrorFunction() is defined in a different namespace than
+  // ProvidedError.
+  // TODO(mtomasz): Remove this trick, once IDL supports namespaces correctly.
+  const api::file_system_provider::ProviderError provider_error =
+      api::file_system_provider::ParseProviderError(params->error);
+
+  if (!service->RejectRequest(extension_id(),
+                              params->file_system_id,
+                              params->request_id,
+                              ProviderErrorToFileError(provider_error))) {
+    // TODO(mtomasz): Pass more detailed errors, rather than just a bool.
+    base::ListValue* result = new base::ListValue();
+    result->Append(
+        CreateError(kSecurityErrorName, kResponseFailedErrorMessage));
+    SetResult(result);
+    return false;
+  }
+
+  base::ListValue* result = new base::ListValue();
+  SetResult(result);
+  SendResponse(true);
+  return true;
+}
+
 }  // namespace extensions