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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 "chrome/browser/policy/policy_path_parser.h"
#include "base/bind.h"
#include "base/files/file_path.h"
namespace {
void TrimQuotes(base::FilePath::StringType* path) {
if (path->length() > 1 &&
(((*path)[0] == FILE_PATH_LITERAL('"') &&
(*path)[path->length() - 1] == FILE_PATH_LITERAL('"')) ||
((*path)[0] == FILE_PATH_LITERAL('\'') &&
(*path)[path->length() - 1] == FILE_PATH_LITERAL('\'')))) {
// Strip first and last char which should be matching quotes now.
*path = path->substr(1, path->length() - 2);
}
}
} // namespace
namespace policy {
namespace path_parser {
namespace internal {
VariableNameAndValueCallback::VariableNameAndValueCallback(
const base::FilePath::CharType* name,
const internal::GetValueCallback value_callback)
: name(name), value_callback(value_callback) {}
VariableNameAndValueCallback::~VariableNameAndValueCallback() {}
} // namespace internal
// This function performs a lazy call to the GetValueCallback, that is the
// callback is invoked only if the variable is found in the path. This is done
// to reduce the overhead during initialization.
void ReplaceVariableInPathWithValue(
const base::FilePath::StringType& variable,
const policy::path_parser::internal::GetValueCallback& value_callback,
base::FilePath::StringType* path) {
size_t position = path->find(variable);
base::FilePath::StringType value;
if (position != base::FilePath::StringType::npos &&
value_callback.Run(&value))
path->replace(position, variable.length(), value);
}
// Replaces all variable occurrences in the policy string with the respective
// system settings values.
base::FilePath::StringType ExpandPathVariables(
const base::FilePath::StringType& untranslated_string) {
base::FilePath::StringType result(untranslated_string);
if (result.length() == 0)
return result;
// Sanitize quotes in case of any around the whole string.
TrimQuotes(&result);
for (int i = 0; i < internal::kNoOfVariables; ++i) {
ReplaceVariableInPathWithValue(
base::FilePath::StringType(
internal::kVariableNameAndValueCallbacks[i].name),
internal::kVariableNameAndValueCallbacks[i].value_callback,
&result);
}
return result;
}
} // namespace path_parser
} // namespace policy
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