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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/web_applications/isolated_web_apps/isolated_web_app_version.h"
#include <string_view>
#include <vector>
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/types/expected.h"
#include "base/version.h"
namespace web_app {
// This parser validates that the given version matches `<version core>` in the
// Semantic Versioning specification: https://semver.org.
base::expected<base::Version, IwaVersionParseError> ParseIwaVersion(
std::string_view version_string) {
std::vector<uint32_t> components;
std::vector<std::string_view> component_strings = base::SplitStringPiece(
version_string, ".", base::KEEP_WHITESPACE, base::SPLIT_WANT_ALL);
if (component_strings.empty()) {
return base::unexpected(IwaVersionParseError::kNoComponents);
}
for (const auto& component_string : component_strings) {
if (component_string.empty()) {
return base::unexpected(IwaVersionParseError::kEmptyComponent);
}
// Disallow leading 0s, but allow a single 0.
if (component_string.size() > 1 && component_string[0] == '0') {
return base::unexpected(IwaVersionParseError::kLeadingZero);
}
// Check that the component only consists of digits.
if (!std::ranges::all_of(component_string, &base::IsAsciiDigit<char>)) {
return base::unexpected(IwaVersionParseError::kNonDigit);
}
unsigned int number;
if (!base::StringToUint(component_string, &number)) {
return base::unexpected(IwaVersionParseError::kCannotConvertToNumber);
}
// StringToUint returns unsigned int but Version fields are uint32_t.
static_assert(sizeof(uint32_t) == sizeof(unsigned int),
"uint32_t must be same as unsigned int");
components.push_back(number);
}
return base::Version(std::move(components));
}
std::string IwaVersionParseErrorToString(IwaVersionParseError error) {
switch (error) {
case IwaVersionParseError::kNoComponents:
return "A version must consist of at least one number";
case IwaVersionParseError::kEmptyComponent:
return "A version component may not be empty";
case IwaVersionParseError::kNonDigit:
return "A version component may only contain digits";
case IwaVersionParseError::kLeadingZero:
return "A version component may not have leading zeros";
case IwaVersionParseError::kCannotConvertToNumber:
return "A version component could not be converted into a number";
}
}
} // namespace web_app
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