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// 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 "google_apis/drive/time_util.h"
#include <string>
#include <vector>
#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 {
const char kNullTimeString[] = "null";
bool ParseTimezone(const base::StringPiece& timezone,
bool ahead,
int* out_offset_to_utc_in_minutes) {
DCHECK(out_offset_to_utc_in_minutes);
std::vector<base::StringPiece> parts = base::SplitStringPiece(
timezone, ":", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
int hour = 0;
if (parts.empty() || !base::StringToInt(parts[0], &hour))
return false;
int minute = 0;
if (parts.size() > 1 && !base::StringToInt(parts[1], &minute))
return false;
*out_offset_to_utc_in_minutes = (hour * 60 + minute) * (ahead ? +1 : -1);
return true;
}
} // namespace
bool GetTimeFromString(const base::StringPiece& raw_value,
base::Time* parsed_time) {
base::StringPiece date;
base::StringPiece time_and_tz;
base::StringPiece time;
base::Time::Exploded exploded = {0};
bool has_timezone = false;
int offset_to_utc_in_minutes = 0;
// Splits the string into "date" part and "time" part.
{
std::vector<base::StringPiece> parts = base::SplitStringPiece(
raw_value, "T", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
if (parts.size() != 2)
return false;
date = parts[0];
time_and_tz = parts[1];
}
// Parses timezone suffix on the time part if available.
{
std::vector<base::StringPiece> parts;
if (time_and_tz[time_and_tz.size() - 1] == 'Z') {
// Timezone is 'Z' (UTC)
has_timezone = true;
offset_to_utc_in_minutes = 0;
time = time_and_tz;
time.remove_suffix(1);
} else {
parts = base::SplitStringPiece(
time_and_tz, "+", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
if (parts.size() == 2) {
// Timezone is "+hh:mm" format
if (!ParseTimezone(parts[1], true, &offset_to_utc_in_minutes))
return false;
has_timezone = true;
time = parts[0];
} else {
parts = base::SplitStringPiece(
time_and_tz, "-", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
if (parts.size() == 2) {
// Timezone is "-hh:mm" format
if (!ParseTimezone(parts[1], false, &offset_to_utc_in_minutes))
return false;
has_timezone = true;
time = parts[0];
} else {
// No timezone (uses local timezone)
time = time_and_tz;
}
}
}
}
// Parses the date part.
{
std::vector<base::StringPiece> parts = base::SplitStringPiece(
date, "-", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
if (parts.size() != 3)
return false;
if (!base::StringToInt(parts[0], &exploded.year) ||
!base::StringToInt(parts[1], &exploded.month) ||
!base::StringToInt(parts[2], &exploded.day_of_month)) {
return false;
}
}
// Parses the time part.
{
std::vector<base::StringPiece> parts = base::SplitStringPiece(
time, ":", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
if (parts.size() != 3)
return false;
if (!base::StringToInt(parts[0], &exploded.hour) ||
!base::StringToInt(parts[1], &exploded.minute)) {
return false;
}
std::vector<base::StringPiece> seconds_parts = base::SplitStringPiece(
parts[2], ".", base::KEEP_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
if (seconds_parts.size() >= 3)
return false;
if (!base::StringToInt(seconds_parts[0], &exploded.second))
return false;
// Only accept milli-seconds (3-digits).
if (seconds_parts.size() > 1 &&
seconds_parts[1].length() == 3 &&
!base::StringToInt(seconds_parts[1], &exploded.millisecond)) {
return false;
}
}
exploded.day_of_week = 0;
if (!exploded.HasValidValues())
return false;
if (has_timezone) {
*parsed_time = base::Time::FromUTCExploded(exploded);
if (offset_to_utc_in_minutes != 0)
*parsed_time -= base::TimeDelta::FromMinutes(offset_to_utc_in_minutes);
} else {
*parsed_time = base::Time::FromLocalExploded(exploded);
}
return true;
}
std::string FormatTimeAsString(const base::Time& time) {
if (time.is_null())
return kNullTimeString;
base::Time::Exploded exploded;
time.UTCExplode(&exploded);
return base::StringPrintf(
"%04d-%02d-%02dT%02d:%02d:%02d.%03dZ",
exploded.year, exploded.month, exploded.day_of_month,
exploded.hour, exploded.minute, exploded.second, exploded.millisecond);
}
std::string FormatTimeAsStringLocaltime(const base::Time& time) {
if (time.is_null())
return kNullTimeString;
base::Time::Exploded exploded;
time.LocalExplode(&exploded);
return base::StringPrintf(
"%04d-%02d-%02dT%02d:%02d:%02d.%03d",
exploded.year, exploded.month, exploded.day_of_month,
exploded.hour, exploded.minute, exploded.second, exploded.millisecond);
}
} // namespace util
} // namespace google_apis
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