/** Sets the date and time using an ISO8601-formatted string
*
* @param str :: ISO8601 format string: "yyyy-mm-ddThh:mm:ss[Z+-]tz:tz"
*/
void DateAndTime::set_from_ISO8601_string(const std::string str)
{
//Make a copy
std::string time = str;
//Default of no timezone offset
bool positive_offset = true;
time_duration tz_offset = boost::posix_time::seconds(0);
//Replace "T" with a space
size_t n = time.find('T');
if (n != std::string::npos)
{
//Take out the T, for later
time[n] = ' ';
//Adjust for time zones. Fun!
//Look for the time zone marker
size_t n2;
n2 = time.find('Z', n);
if (n2 != std::string::npos)
{
//Found a Z. Remove it, and no timezone fix
time = time.substr(0, n2);
}
else
{
//Look for a + or - indicating time zone offset
size_t n_plus,n_minus,n5;
n_plus = time.find('+', n);
n_minus = time.find('-', n);
if ((n_plus != std::string::npos) || (n_minus != std::string::npos))
{
//Either a - or a + was found
if (n_plus != std::string::npos)
{
positive_offset = true;
n5 = n_plus;
}
else
{
positive_offset = false;
n5 = n_minus;
}
//Now, parse the offset time
std::string offset_str = time.substr(n5+1, time.size()-n5-1);
//Take out the offset from time string
time = time.substr(0, n5);
//Separate into minutes and hours
size_t n6;
std::string hours_str("0"), minutes_str("0");
n6 = offset_str.find(':');
if ((n6 != std::string::npos))
{
//Yes, minutes offset are specified
minutes_str = offset_str.substr(n6+1, offset_str.size()-n6-1);
hours_str = offset_str.substr(0, n6);
}
else
//Just hours
hours_str = offset_str;
//Convert to a time_duration
tz_offset = boost::posix_time::hours( boost::lexical_cast<long>(hours_str)) +
boost::posix_time::minutes( boost::lexical_cast<long>(minutes_str));
}
}
}
//The boost conversion will convert the string, then we subtract the time zone offset
if (positive_offset)
//The timezone is + so we need to subtract the hours
this->set_from_ptime( boost::posix_time::time_from_string(time) - tz_offset );
else
//The timezone is - so we need to ADD the hours
this->set_from_ptime( boost::posix_time::time_from_string(time) + tz_offset );
}
/** Sets the date and time using an ISO8601-formatted string
*
* @param str :: ISO8601 format string: "yyyy-mm-ddThh:mm:ss[Z+-]tz:tz"
* @param displayLogs :: flag to indiciate if the logs should be displayed
*/
void DateAndTime::setFromISO8601(const std::string &str, bool displayLogs) {
// Make a copy
std::string time = str;
// Some ARGUS files have an invalid date with a space instead of zero.
// To enable such files to be loaded we correct the date and issue a warning
// (ticket #4017).
std::string date = time.substr(
0, 10); // just take the date not the time or any date-time separator
const size_t nSpace = date.find(' ');
if (nSpace != std::string::npos) {
if (displayLogs) {
g_log.warning() << "Invalid ISO8601 date " << time;
}
time[nSpace] = '0'; // replace space with 0
// Do again in case of second space
date[nSpace] = '0';
const size_t nSecondSpace = date.find(' ');
if (nSecondSpace != std::string::npos)
time[nSecondSpace] = '0';
if (displayLogs) {
g_log.warning() << " corrected to " << time << '\n';
}
}
// Default of no timezone offset
bool positive_offset = true;
time_duration tz_offset = boost::posix_time::seconds(0);
// Replace "T" with a space
const size_t nCharT = time.find('T');
if (nCharT != std::string::npos) {
// Take out the T, for later
time[nCharT] = ' ';
// Adjust for time zones. Fun!
// Look for the time zone marker
const size_t nCharZ = time.find('Z', nCharT);
if (nCharZ != std::string::npos) {
// Found a Z. Remove it, and no timezone fix
time = time.substr(0, nCharZ);
} else {
// Look for a + or - indicating time zone offset
size_t n_plus, n_minus;
n_plus = time.find('+', nCharT);
n_minus = time.find('-', nCharT);
if ((n_plus != std::string::npos) || (n_minus != std::string::npos)) {
size_t nPlusMinus;
// Either a - or a + was found
if (n_plus != std::string::npos) {
positive_offset = true;
nPlusMinus = n_plus;
} else {
positive_offset = false;
nPlusMinus = n_minus;
}
// Now, parse the offset time
std::string offset_str =
time.substr(nPlusMinus + 1, time.size() - nPlusMinus - 1);
// Take out the offset from time string
time = time.substr(0, nPlusMinus);
// Separate into minutes and hours
std::string hours_str("0"), minutes_str("0");
const size_t nColon = offset_str.find(':');
if ((nColon != std::string::npos)) {
// Yes, minutes offset are specified
minutes_str =
offset_str.substr(nColon + 1, offset_str.size() - nColon - 1);
hours_str = offset_str.substr(0, nColon);
} else
// Just hours
hours_str = offset_str;
// Convert to a time_duration
tz_offset =
boost::posix_time::hours(boost::lexical_cast<long>(hours_str)) +
boost::posix_time::minutes(boost::lexical_cast<long>(minutes_str));
}
}
}
// The boost conversion will convert the string, then we subtract the time
// zone offset
// Different versions of boost accept slightly different things. Earlier
// versions
// seem to accept only a date as valid, whereas later versions do not. We want
// the
// string to always denote the full timestamp so we check for a colon and if
// it is not present then throw an exception.
if (time.find(':') == std::string::npos)
throw std::invalid_argument("Error interpreting string '" + str +
"' as a date/time.");
try {
if (positive_offset)
// The timezone is + so we need to subtract the hours
this->set_from_ptime(boost::posix_time::time_from_string(time) -
tz_offset);
else
// The timezone is - so we need to ADD the hours
this->set_from_ptime(boost::posix_time::time_from_string(time) +
tz_offset);
} catch (std::exception &) {
// Re-throw a more helpful error message
throw std::invalid_argument("Error interpreting string '" + str +
"' as a date/time.");
}
}