#use wml::std::tags
#use wml::debian::common_tags

<bind-gettext-domain domain="date" />

<perl>
use Time::Local;

@dow = (
# List of weekday names (used in modification dates)
                '<gettext domain="date">Sun</gettext>',
                '<gettext domain="date">Mon</gettext>',
                '<gettext domain="date">Tue</gettext>',
                '<gettext domain="date">Wed</gettext>',
                '<gettext domain="date">Thu</gettext>',
                '<gettext domain="date">Fri</gettext>',
                '<gettext domain="date">Sat</gettext>'
);

@moy = (
# List of month names (used in modification dates, and may be used in news 
# listings)
                '<gettext domain="date">Jan</gettext>',
                '<gettext domain="date">Feb</gettext>',
                '<gettext domain="date">Mar</gettext>',
                '<gettext domain="date">Apr</gettext>',
                '<gettext domain="date">May</gettext>',
                '<gettext domain="date">Jun</gettext>',
                '<gettext domain="date">Jul</gettext>',
                '<gettext domain="date">Aug</gettext>',
                '<gettext domain="date">Sep</gettext>',
                '<gettext domain="date">Oct</gettext>',
                '<gettext domain="date">Nov</gettext>',
                '<gettext domain="date">Dec</gettext>'
);

@longmoy = (
# List of long month names (may be used in "spoken" dates and date ranges).
                '<gettext domain="date">January</gettext>',
                '<gettext domain="date">February</gettext>',
                '<gettext domain="date">March</gettext>',
                '<gettext domain="date">April</gettext>',
# The <void> tag is to distinguish short and long forms of May.
# Do not put it in msgstr.
                '<gettext domain="date"><void id="fullname" />May</gettext>',
                '<gettext domain="date">June</gettext>',
                '<gettext domain="date">July</gettext>',
                '<gettext domain="date">August</gettext>',
                '<gettext domain="date">September</gettext>',
                '<gettext domain="date">October</gettext>',
                '<gettext domain="date">November</gettext>',
                '<gettext domain="date">December</gettext>'
);

# $dateform: Date format (sprintf) for modification dates.
# Available variables are: $mday = day-of-month, $monnr = month number,
# $mon = month string (from @moy), $year = year number.
# Percent signs are escaped because they are special during pass 2,
# replace all % by [%]
$dateform = '<gettext domain="date">q{[%]s, [%]s [%]2d [%]02d:[%]02d:[%]02d [%]s [%]04d}, $wday, $mon, $mday, $hour, $min, $sec, q{UTC}, 1900+$year</gettext>';
$dateform =~ s/\[%\]/%/g;

# $newsdateform: Date format (sprintf) for news items.
# Available variables are: $mday = day-of-month, $mon = month number,
# $mon_str = month string (from @moy), $year = year number.
# Percent signs are escaped because they are special during pass 2,
# replace all % by [%]
$newsdateform = '<gettext domain="date">q{[%]02d [%]s [%]04d}, $mday, $mon_str, $year</gettext>';
$newsdateform =~ s/\[%\]/%/g;

# $spokendateform: Date format (sprintf) for "spoken" dates
# (such as the current release date).
# Any special cases (such as the st/nd/rd/th suffixes in English) are
# handled in the spokendate subroutine below.
# Available variables are: $mday = day-of-month, $mon = month number,
# $mon_str = month string (from @longmoy), $year = year number.
# Percent signs are escaped because they are special during pass 2,
# replace all % by [%]
$spokendateform = '<gettext domain="date">q{[%]02d [%]s [%]d}, $mday, $mon_str, $year</gettext>';
$spokendateform =~ s/\[%\]/%/g;

# $spokendateform_noyear: Date format (sprintf) for "spoken" dates
# (such as the current release date), without the year.
# Any special cases (such as the st/nd/rd/th suffixes in English) are
# handled in the spokendate subroutine below.
# Available variables are: $mday = day-of-month, $mon = month number,
# $mon_str = month string (from @longmoy).
# Percent signs are escaped because they are special during pass 2,
# replace all % by [%]
$spokendateform_noyear = '<gettext domain="date">q{[%]d [%]s}, $mday, $mon_str</gettext>';
$spokendateform_noyear =~ s/\[%\]/%/g;

# $spokendateform_noday: Date format (sprintf) for "spoken" dates
# (such a conference event), without the day.
# Available variables are: $mon = month number,
# $mon_str = month string (from @longmoy), $year = year number.
# Percent signs are escaped because they are special during pass 2,
# replace all % by [%]
$spokendateform_noday = '<gettext domain="date">q{[%]s [%]s}, $mon_str, $year</gettext>';
$spokendateform_noday =~ s/\[%\]/%/g;

# $rangeform_samemonth: Date format (sprintf) for date ranges
# (used mainly for events pages), for ranges within the same month.
# Any special cases (such as the st/nd/rd/th suffixes in English) are
# handled in the spokendate subroutine below.
# Available variables are: $sday = start day-of-month, $eday = end
# day-of-month, $smon = month number, $smon_str = month string (from @longmoy)
# Percent signs are escaped because they are special during pass 2,
# replace all % by [%]
$rangeform_samemonth = '<gettext domain="date">q{[%]d-[%]d [%]s}, $sday, $eday, $smon_str</gettext>';
$rangeform_samemonth =~ s/\[%\]/%/g;

# $rangeform_severalmonths: Date format (sprintf) for date ranges
# (used mainly for events pages), for ranges spanning the end of a month.
# Any special cases (such as the st/nd/rd/th suffixes in English) are
# handled in the spokendate subroutine below.
# Available variables are: $sday = start day-of-month, $eday, end
# day-of-month, $smon = start month number, $emon = end month number,
# $smon_str = start month string (from @longmoy), $emon_str = end month string
# Percent signs are escaped because they are special during pass 2,
# replace all % by [%]
$rangeform_severalmonths = '<gettext domain="date">q{[%]d [%]s-[%]d [%]s}, $sday, $smon_str, $eday, $emon_str</gettext>';
$rangeform_severalmonths =~ s/\[%\]/%/g;

# This function creates a last *built* time stamp for a web page.
sub webwml_built_time {
	my ($sec, $min, $hour, $mday, $monnr, $year, $wday, $yday, $isdst, $mon);
	($sec, $min, $hour, $mday, $monnr, $year, $wday, $yday, $isdst) = gmtime();
	$wday = $dow[$wday];
	$mon = $moy[$monnr];
	return eval("sprintf($dateform)");
}

# This function creates a last *modified* time stamp for the source of a web page.
sub webwml_modified_time {
	my ($time, $sec, $min, $hour, $mday, $monnr, $year, $wday, $yday, $isdst, $mon);
	# The last modification time of inputfile in ISO dd-mm-yyyy hh:mm:ss format.
	$WML_SRC_ISOTIME =~ /(\d+)-(..)-(\d+) (..):(..):(..)/;
	if ($1 <= 31) { # for WML 1.x
	    $time = timelocal($6, $5, $4, $1, $2-1, $3);
	} else { # for WML 2.x
	    $time = timelocal($6, $5, $4, $3, $2-1, $1);
	}
	# $lday=$1; $lmon=$2; $lyear=$3; $lhr=$4; $lmin=$5; $lsec=$6;
	# if ($lyear > 19000) { $lyear = 1900+($lyear-19000); }
	# $time = timelocal($lsec, $lmin, $lhr, $lday, $lmon-1, $lyear);
	($sec, $min, $hour, $mday, $monnr, $year, $wday, $yday, $isdst) = gmtime($time);
	$wday = $dow[$wday];
	$mon = $moy[$monnr];
	return eval("sprintf($dateform)");
}

# creates a timestamp in "W3C Date and Time Format"
# see http://www.w3.org/TR/NOTE-datetime
sub rdf_ctime {
	$WML_GEN_ISOTIME =~ /(\d+)-(..)-(\d+) (..):(..):(..)/;
	if ($1 <= 31) { # for WML 1.x
		$time = timelocal($6, $5, $4, $1, $2-1, $3);
	} else { # for WML 2.x
		$time = timelocal($6, $5, $4, $3, $2-1, $1);
	}
	my ($sec, $min, $hour, $mday, $monnr, $year, $wday, $yday, $isdst) = gmtime($time);
	$year += 1900;
	$monnr += 1;
	return sprintf( "%04d-%02d-%02dT%02d:%02d:%02d+00:00", $year, $monnr, $mday, $hour, $min, $sec );
}

# This function creates a terse date string for use in news articles.
# Input: A date in ISO format (YYYY-MM-DD).
sub newsdate {
	my ($year, $mon, $mday) = split /-/, $_[0];
	# Make sure the date is in the YYYY-MM-DD format
	return $_[0] unless $mday;
	return $_[0] if ($year < 1900);

	# Expand month number to string
	$mon_str = $moy[$mon - 1];

	# Return translated date
	return eval("sprintf($newsdateform)");
}

# Utility function for spokendate and daterange: Return the correct order
# suffix for a date in English (i.e 24 => "th").
sub englishsuffix {
	my $mday = shift;

	return 'st' if $mday % 10 == 1 && $mday != 11;
	return 'nd' if $mday % 10 == 2 && $mday != 12;
	return 'rd' if $mday % 10 == 3 && $mday != 13;
	return 'th';
}

# Utility function for spokendate and daterange: Contract "de " followed by
# a vowel into "d'" for Catalan
sub contractcatalan {
	my $str = shift;
	$str =~ s/\bde ([aáàeéèiïíoóòuúü])/d'$1/g;
	return $str;
}

# Utility function for spokendate and daterange: Return "^er""
# suffix for the first date of month in French.
sub frenchsuffix {
        my $mday = shift;

        return '<sup>er</sup>' if $mday == 1;
}


# This function creates a "spoken" date string for use in text, for example
# the date of the previous release.
# Input: A date in ISO format (YYYY-MM-DD). 
sub spokendate {
	my ($year, $mon, $mday) = split /-/, $_[0];
	my $appday;
	# Make sure the date is in the YYYY-MM-DD format
	return $_[0] unless $mon;
	return $_[0] if ($year < 1900);

	# Expand month string
	$mon_str = $longmoy[$mon - 1];

	return eval("sprintf($spokendateform_noday)") unless $mday;

	# Return translated date
	if ($CUR_ISO_LANG eq "en")
	{
		# Special handling of English: suffix the date with "st", "nd", "rd"
		# or "th", according to the numeric date.

		return sprintf("%s %d%s, %d", $mon_str, $mday, &englishsuffix($mday), $year);
	}
	elsif ($CUR_ISO_LANG eq "ca")
	{
		# Special handling of Catalan: "de " followed by a vowel should be
		# contracted to "d'" in the spoken date form

		my $date = sprintf("%d de %s de %d", $mday, $mon_str, $year);
		return &contractcatalan($date);
	}
	# Add any other special cases here as elsif cases
	else
	{
		# Return translated date,
		return eval("sprintf($spokendateform)");
	}
}

# This function creates a "spoken" date string for use in text, without the
# year.
# Input: A date in ISO format (YYYY-MM-DD).
sub spokendate_noyear {
	my (undef, $mon, $mday) = split /-/, $_[0];
	my $appday;

	# Expand month string
	$mon_str = $longmoy[$mon - 1];

	# Return translated date
	if ($CUR_ISO_LANG eq "en")
	{
		# Special handling of English: suffix the date with "st", "nd", "rd"
		# or "th", according to the numeric date.

		return sprintf("%s %d%s", $mon_str, $mday, &englishsuffix($mday));
	}
	elsif ($CUR_ISO_LANG eq "ca")
	{
		# Special handling of Catalan: "de " followed by a vowel should be
		# contracted to "d'" in the spoken date form

		my $date = sprintf("%d de %s", $mday, $mon_str);
		return &contractcatalan($date);
        }
	# Add any other special cases here as elsif cases
	else
	{
		# Return translated date,
		return eval("sprintf($spokendateform_noyear)");
	}
}

# This function creates a string describing a date range for use in text,
# mainly used in the events pages. There are three string forms: One for
# one-day ranges, one for ranges inside one month, and one for ranges
# covering two months. The year(s) are not used by this function.
# Input: Two dates in ISO format (YYYY-MM-DD).
sub daterange {
	my (undef, $smon, $sday) = split /-/, $_[0]; # Start date
	my (undef, $emon, $eday) = split /-/, $_[1]; # End date

	my $samemonth = $smon == $emon;

	if ($samemonth && $sday == $eday)
	{
		return spokendate_noyear($_[0]); # Single day
	}

	# Expand month strings
	$smon_str = $longmoy[$smon - 1];
	$emon_str = $longmoy[$emon - 1];

	# Return translated date range
	if ($CUR_ISO_LANG eq "en")
	{
		# Special handling of English: suffix the date with "st", "nd", "rd"
		# or "th", according to the numeric date.

		return sprintf("%s %d%s - %d%s", $smon_str,
		               $sday, &englishsuffix($sday),
		               $eday, &englishsuffix($eday))
			if $samemonth;

		return sprintf("%s %d%s - %s %d%s", $smon_str,
		               $sday, &englishsuffix($sday), $emon_str,
		               $eday, &englishsuffix($eday))
	}
	elsif ($CUR_ISO_LANG eq "ca")
	{
		# Special handling of Catalan: "de " followed by a vowel should be
		# contracted to "d'" in the spoken date form

		my $str;
		$str = sprintf("%d-%d de %s", $sday, $eday, $smon_str)
			if $samemonth;
		$str = sprintf("%d de %s-%d de %s", $sday, $smon_str, $eday, $emon_str)
			if !$samemonth;

		return &contractcatalan($str);
	}
	# Add any other special cases here as elsif cases
	else
	{
		# Return translated range,
		return $samemonth ?
			eval("sprintf($rangeform_samemonth)") :
			eval("sprintf($rangeform_severalmonths)");
	}
}
</perl>