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// Copyright 2014 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 "extensions/common/permissions/media_galleries_permission.h"
#include <stddef.h>
#include <set>
#include <string>
#include "base/logging.h"
#include "base/strings/utf_string_conversions.h"
#include "extensions/common/permissions/permissions_info.h"
#include "grit/extensions_strings.h"
#include "ui/base/l10n/l10n_util.h"
namespace extensions {
namespace {
// copyTo permission requires delete permission as a prerequisite.
// delete permission requires read permission as a prerequisite.
bool IsValidPermissionSet(bool has_read, bool has_copy_to, bool has_delete,
std::string* error) {
if (has_copy_to) {
if (has_read && has_delete)
return true;
if (error)
*error = "copyTo permission requires read and delete permissions";
return false;
}
if (has_delete) {
if (has_read)
return true;
if (error)
*error = "delete permission requires read permission";
return false;
}
return true;
}
// Adds the permissions from the |data_set| to |ids|.
void AddPermissionsToLists(
const std::set<MediaGalleriesPermissionData>& data_set,
PermissionIDSet* ids) {
// TODO(sashab): Once GetMessages() is deprecated, move this logic back into
// GetPermissions().
bool has_all_auto_detected = false;
bool has_read = false;
bool has_copy_to = false;
bool has_delete = false;
for (std::set<MediaGalleriesPermissionData>::const_iterator it =
data_set.begin();
it != data_set.end(); ++it) {
if (it->permission() ==
MediaGalleriesPermission::kAllAutoDetectedPermission)
has_all_auto_detected = true;
else if (it->permission() == MediaGalleriesPermission::kReadPermission)
has_read = true;
else if (it->permission() == MediaGalleriesPermission::kCopyToPermission)
has_copy_to = true;
else if (it->permission() == MediaGalleriesPermission::kDeletePermission)
has_delete = true;
}
if (!IsValidPermissionSet(has_read, has_copy_to, has_delete, NULL)) {
NOTREACHED();
return;
}
// If |has_all_auto_detected| is false, then Chrome will prompt the user at
// runtime when the extension call the getMediaGalleries API.
if (!has_all_auto_detected)
return;
// No access permission case.
if (!has_read)
return;
// Separate PermissionMessage IDs for read, copyTo, and delete. Otherwise an
// extension can silently gain new access capabilities.
ids->insert(APIPermission::kMediaGalleriesAllGalleriesRead);
// For copyTo and delete, the proper combined permission message will be
// derived in ChromePermissionMessageProvider::GetWarningMessages(), such
// that the user get 1 entry for all media galleries access permissions,
// rather than several separate entries.
if (has_copy_to)
ids->insert(APIPermission::kMediaGalleriesAllGalleriesCopyTo);
if (has_delete)
ids->insert(APIPermission::kMediaGalleriesAllGalleriesDelete);
}
} // namespace
const char MediaGalleriesPermission::kAllAutoDetectedPermission[] =
"allAutoDetected";
const char MediaGalleriesPermission::kScanPermission[] = "scan";
const char MediaGalleriesPermission::kReadPermission[] = "read";
const char MediaGalleriesPermission::kCopyToPermission[] = "copyTo";
const char MediaGalleriesPermission::kDeletePermission[] = "delete";
MediaGalleriesPermission::MediaGalleriesPermission(
const APIPermissionInfo* info)
: SetDisjunctionPermission<MediaGalleriesPermissionData,
MediaGalleriesPermission>(info) {
}
MediaGalleriesPermission::~MediaGalleriesPermission() {
}
bool MediaGalleriesPermission::FromValue(
const base::Value* value,
std::string* error,
std::vector<std::string>* unhandled_permissions) {
size_t unhandled_permissions_count = 0;
if (unhandled_permissions)
unhandled_permissions_count = unhandled_permissions->size();
bool parsed_ok =
SetDisjunctionPermission<MediaGalleriesPermissionData,
MediaGalleriesPermission>::FromValue(
value, error, unhandled_permissions);
if (unhandled_permissions) {
for (size_t i = unhandled_permissions_count;
i < unhandled_permissions->size();
i++) {
(*unhandled_permissions)[i] =
"{\"mediaGalleries\": [" + (*unhandled_permissions)[i] + "]}";
}
}
if (!parsed_ok)
return false;
bool has_read = false;
bool has_copy_to = false;
bool has_delete = false;
for (std::set<MediaGalleriesPermissionData>::const_iterator it =
data_set_.begin(); it != data_set_.end(); ++it) {
if (it->permission() == kAllAutoDetectedPermission ||
it->permission() == kScanPermission) {
continue;
}
if (it->permission() == kReadPermission) {
has_read = true;
continue;
}
if (it->permission() == kCopyToPermission) {
has_copy_to = true;
continue;
}
if (it->permission() == kDeletePermission) {
has_delete = true;
continue;
}
// No other permissions, so reaching this means
// MediaGalleriesPermissionData is probably out of sync in some way.
// Fail so developers notice this.
NOTREACHED();
return false;
}
return IsValidPermissionSet(has_read, has_copy_to, has_delete, error);
}
PermissionIDSet MediaGalleriesPermission::GetPermissions() const {
PermissionIDSet result;
AddPermissionsToLists(data_set_, &result);
return result;
}
} // namespace extensions
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