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131 lines
2.6 KiB
131 lines
2.6 KiB
package App::WRT::Date;
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use strict;
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use warnings;
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use base qw(Exporter);
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our @EXPORT_OK = qw(iso_date rfc_3339_date get_date get_mtime month_name);
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use POSIX qw(strftime);
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=head1 NAME
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App::WRT::Date - a small collection of date utility functions
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=head2 FUNCTIONS
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=over
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=item rfc_3339_date($time)
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Return an RFC 3339 date string for the given epoch time.
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L<https://www.ietf.org/rfc/rfc3339.txt>
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=cut
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sub rfc_3339_date {
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my ($time) = @_;
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my $time_str = strftime('%Y-%m-%dT%H:%M:%S%z', localtime($time));
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# HACK: Add a : to the last 4 digits, because apparently this isn't supported
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# by POSIX strftime().
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$time_str =~ s/(\d{2})(\d{2})$/$1:$2/x;
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return $time_str;
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}
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=item iso_date($time)
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Return an ISO 8601 date string for the given epoch time.
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=cut
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sub iso_date {
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my ($time) = @_;
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return strftime("%Y-%m-%dT%H:%M:%SZ", localtime($time));
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}
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=item get_mtime(@filenames)
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Return one or more mtimes for a given list of files.
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=cut
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sub get_mtime {
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my (@filenames) = @_;
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my @mtimes;
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for my $filename (@filenames) {
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#my( $dev, $ino, $mode, $nlink, $uid, $gid, $rdev, $size,
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# $atime, $mtime, $ctime, $blksize, $blocks )
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# = stat( $filename );
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push @mtimes, (stat $filename)[9];
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}
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# return a list if we've got more than one, a scalar
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# otherwise. is this evil? or even necessary?
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if (@mtimes > 1) {
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return @mtimes;
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} else {
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return $mtimes[0];
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}
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}
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=item month_name($number)
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Turn numeric months into English names.
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=cut
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{
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# "Null" is here so that $month_name[1] corresponds to January, etc.
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my @months = qw(Null January February March April May June
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July August September October November December);
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sub month_name {
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my ($number) = @_;
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return $months[$number];
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}
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}
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=item get_date('key', 'other_key', ...)
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Return current date values for the given key. Valid keys are sec, min, hour,
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mday (day of month), mon, year, wday (day of week), yday (day of year), and
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isdst (is daylight savings).
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Remember that year is given in years after 1900.
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=cut
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# Below replaces:
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# my ($sec, $min, $hour, $mday, $mon,
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# $year, $wday, $yday, $isdst) = localtime(time);
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{
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my %name_map = (
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sec => 0, min => 1, hour => 2, mday => 3,
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mon => 4, year => 5, wday => 6, yday => 5,
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isdst => 6,
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);
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sub get_date {
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my (@names) = @_;
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my (@indices) = @name_map{@names};
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my (@values) = (localtime time)[@indices];
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if (wantarray()) {
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# my ($foo, $bar) = get_date('foo', 'bar');
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return @values;
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} else {
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# this is probably useless unless you're getting just one value
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return join '', @values;
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}
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}
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}
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=back
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=cut
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1;
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