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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "google_apis/common/time_util.h"
#include <string>
#include <string_view>
#include <vector>
#include "base/i18n/time_formatting.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/time/time.h"
namespace google_apis {
namespace util {
namespace {
constexpr char kNullTimeString[] = "null";
// Sugar for calling the base:: method with the handling we always desire.
std::vector<std::string_view> SplitStringPiece(std::string_view input,
std::string_view separators) {
return base::SplitStringPiece(input, separators, base::KEEP_WHITESPACE,
base::SPLIT_WANT_NONEMPTY);
}
} // namespace
bool GetTimeFromString(std::string_view raw_value, base::Time* parsed_time) {
// Split the input into "date" and "time" parts.
std::string_view date;
std::string_view time;
{
std::vector<std::string_view> parts = SplitStringPiece(raw_value, "T");
if (parts.size() != 2) {
return false;
}
date = parts[0];
time = parts[1];
}
// Parse timezone suffix, if available.
bool has_timezone = false;
base::TimeDelta timezone_offset;
{
if (time.back() == 'Z') {
// Timezone is 'Z' (UTC).
has_timezone = true;
time.remove_suffix(1);
} else {
bool ahead = true;
std::vector<std::string_view> parts = SplitStringPiece(time, "+");
if (parts.size() != 2) {
ahead = false;
parts = SplitStringPiece(time, "-");
}
if (parts.size() == 2) {
// Timezone is "+/-hh:mm".
std::vector<std::string_view> tz_parts =
SplitStringPiece(parts[1], ":");
int hour = 0, minute = 0;
if (tz_parts.empty() || !base::StringToInt(tz_parts[0], &hour) ||
(tz_parts.size() > 1 && !base::StringToInt(tz_parts[1], &minute))) {
return false;
}
has_timezone = true;
time = parts[0];
timezone_offset =
(base::Hours(hour) + base::Minutes(minute)) * (ahead ? +1 : -1);
}
}
}
// Parse the date.
base::Time::Exploded exploded = {0};
{
std::vector<std::string_view> parts = SplitStringPiece(date, "-");
if (parts.size() != 3 || !base::StringToInt(parts[0], &exploded.year) ||
!base::StringToInt(parts[1], &exploded.month) ||
!base::StringToInt(parts[2], &exploded.day_of_month)) {
return false;
}
}
// Parse the time.
{
std::vector<std::string_view> parts = SplitStringPiece(time, ":");
if (parts.size() != 3 || !base::StringToInt(parts[0], &exploded.hour) ||
!base::StringToInt(parts[1], &exploded.minute)) {
return false;
}
std::vector<std::string_view> seconds_parts =
SplitStringPiece(parts[2], ".");
if (seconds_parts.size() >= 3 ||
!base::StringToInt(seconds_parts[0], &exploded.second) ||
// Only accept milliseconds (3 digits).
(seconds_parts.size() > 1 && seconds_parts[1].length() == 3 &&
!base::StringToInt(seconds_parts[1], &exploded.millisecond))) {
return false;
}
}
// Convert back to a `base::Time`.
if (!exploded.HasValidValues() ||
!(has_timezone ? base::Time::FromUTCExploded(exploded, parsed_time)
: base::Time::FromLocalExploded(exploded, parsed_time))) {
return false;
}
*parsed_time -= timezone_offset;
return true;
}
bool GetDateOnlyFromString(std::string_view raw_value,
base::Time* parsed_time) {
// Parse the date part.
base::Time::Exploded exploded = {0};
{
std::vector<std::string_view> parts = SplitStringPiece(raw_value, "-");
if (parts.size() != 3 || !base::StringToInt(parts[0], &exploded.year) ||
!base::StringToInt(parts[1], &exploded.month) ||
!base::StringToInt(parts[2], &exploded.day_of_month)) {
return false;
}
}
// Convert back to a `base::Time`.
base::Time time;
if (!base::Time::FromUTCExploded(exploded, &time)) {
return false;
}
// Zero the time part.
*parsed_time = time.UTCMidnight();
return true;
}
std::string FormatTimeAsString(const base::Time& time) {
return time.is_null() ? std::string(kNullTimeString)
: base::TimeFormatAsIso8601(time);
}
std::string FormatTimeAsStringLocaltime(const base::Time& time) {
return time.is_null() ? std::string(kNullTimeString)
: base::UnlocalizedTimeFormatWithPattern(
time, "yyyy-MM-dd'T'HH:mm:ss.SSS");
}
} // namespace util
} // namespace google_apis
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