// 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.

#include "chrome/browser/google_apis/drive_api_url_generator.h"

#include "base/stringprintf.h"
#include "base/strings/string_number_conversions.h"
#include "net/base/escape.h"
#include "net/base/url_util.h"

namespace google_apis {

namespace {

// Hard coded URLs for communication with a google drive server.
const char kDriveV2AboutUrl[] = "/drive/v2/about";
const char kDriveV2ApplistUrl[] = "/drive/v2/apps";
const char kDriveV2ChangelistUrl[] = "/drive/v2/changes";
const char kDriveV2FilelistUrl[] = "/drive/v2/files";
const char kDriveV2FileUrlPrefix[] = "/drive/v2/files/";
const char kDriveV2ChildrenUrlFormat[] = "/drive/v2/files/%s/children";
const char kDriveV2ChildrenUrlForRemovalFormat[] =
    "/drive/v2/files/%s/children/%s";
const char kDriveV2FileTrashUrlFormat[] = "/drive/v2/files/%s/trash";

}  // namespace

DriveApiUrlGenerator::DriveApiUrlGenerator(const GURL& base_url)
    : base_url_(base_url) {
  // Do nothing.
}

DriveApiUrlGenerator::~DriveApiUrlGenerator() {
  // Do nothing.
}

const char DriveApiUrlGenerator::kBaseUrlForProduction[] =
    "https://www.googleapis.com";

GURL DriveApiUrlGenerator::GetAboutUrl() const {
  return base_url_.Resolve(kDriveV2AboutUrl);
}

GURL DriveApiUrlGenerator::GetApplistUrl() const {
  return base_url_.Resolve(kDriveV2ApplistUrl);
}

GURL DriveApiUrlGenerator::GetChangelistUrl(
    const GURL& override_url, int64 start_changestamp) const {
  // Use override_url if not empty,
  // otherwise use the default url (kDriveV2Changelisturl based on base_url_).
  const GURL& url = override_url.is_empty() ?
      base_url_.Resolve(kDriveV2ChangelistUrl) :
      override_url;
  return start_changestamp ?
      net::AppendOrReplaceQueryParameter(
          url, "startChangeId", base::Int64ToString(start_changestamp)) :
      url;
}

GURL DriveApiUrlGenerator::GetFilelistUrl(
    const GURL& override_url, const std::string& search_string) const {
  // Use override_url if not empty,
  // otherwise use the default url (kDriveV2FilelistUrl based on base_url_).
  const GURL& url = override_url.is_empty() ?
      base_url_.Resolve(kDriveV2FilelistUrl) :
      override_url;
  return search_string.empty() ?
      url :
      net::AppendOrReplaceQueryParameter(url, "q", search_string);
}

GURL DriveApiUrlGenerator::GetFileUrl(const std::string& file_id) const {
  return base_url_.Resolve(kDriveV2FileUrlPrefix + net::EscapePath(file_id));
}

GURL DriveApiUrlGenerator::GetFileTrashUrl(const std::string& file_id) const {
  return base_url_.Resolve(
      base::StringPrintf(kDriveV2FileTrashUrlFormat,
                         net::EscapePath(file_id).c_str()));
}

GURL DriveApiUrlGenerator::GetChildrenUrl(
    const std::string& resource_id) const {
  return base_url_.Resolve(
      base::StringPrintf(kDriveV2ChildrenUrlFormat,
                         net::EscapePath(resource_id).c_str()));
}

GURL DriveApiUrlGenerator::GetChildrenUrlForRemoval(
    const std::string& folder_id, const std::string& child_id) const {
  return base_url_.Resolve(
      base::StringPrintf(kDriveV2ChildrenUrlForRemovalFormat,
                         net::EscapePath(folder_id).c_str(),
                         net::EscapePath(child_id).c_str()));
}

}  // namespace google_apis