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hpr-tools/Community_News/reserve_cnews

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#!/usr/bin/env perl
#===============================================================================
#
# FILE: reserve_cnews
#
# USAGE: ./reserve_cnews [-from[=DATE]] [-count=COUNT] [-[no]dry-run]
# [-[no]silent] [-config=FILE] [-help] [-debug=N]
#
# DESCRIPTION: Reserve a series of slots from a given date for the Community
# News shows by computing the dates for the reservations and
# then working out the show numbers from there.
#
# OPTIONS: ---
# REQUIREMENTS: ---
# BUGS: ---
# NOTES: ---
# AUTHOR: Dave Morriss (djm), Dave.Morriss@gmail.com
# VERSION: 0.0.14
# CREATED: 2014-04-29 22:16:00
# REVISION: 2023-04-10 16:05:36
#
#===============================================================================
use 5.010;
use strict;
use warnings;
use utf8;
use Getopt::Long;
use Pod::Usage;
use Config::General;
use Date::Parse;
use Date::Calc qw{:all};
use DBI;
use Data::Dumper;
#
# Version number (manually incremented)
#
our $VERSION = '0.0.14';
#
# Script name
#
( my $PROG = $0 ) =~ s|.*/||mx;
( my $DIR = $0 ) =~ s|/?[^/]*$||mx;
$DIR = '.' unless $DIR;
#-------------------------------------------------------------------------------
# Declarations
#-------------------------------------------------------------------------------
#
# Constants and other declarations
#
my $basedir = "$ENV{HOME}/HPR/Community_News";
my $configfile = "$basedir/.hpr_db.cfg";
my $hostname = 'HPR Volunteers';
my $seriesname = 'HPR Community News';
my $tags = 'Community News';
my $titlefmt = 'HPR Community News for %s %d';
my $summaryfmt = 'HPR Volunteers talk about shows released and comments '
. 'posted in %s %d';
my ( $dbh, $sth1, $sth2, $sth3, $h1, $h2, $rv );
my (@startdate, @rdate, @lastmonth, $show,
$hostid, $series, $title, $summary
);
#
# Enable Unicode mode
#
binmode STDOUT, ":encoding(UTF-8)";
binmode STDERR, ":encoding(UTF-8)";
#-------------------------------------------------------------------------------
# Options and arguments
#-------------------------------------------------------------------------------
my $DEFDEBUG = 0;
my $DEF_COUNT = 12;
#
# Process options
#
my %options;
Options( \%options );
#
# Default help
#
pod2usage( -msg => "$PROG version $VERSION\n", -exitval => 1 )
if ( $options{'help'} );
#
# Collect options
#
my $DEBUG = ( $options{'debug'} ? $options{'debug'} : $DEFDEBUG );
my $cfgfile
= ( defined( $options{config} ) ? $options{config} : $configfile );
my $dry_run = ( defined( $options{'dry-run'} ) ? $options{'dry-run'} : 0 );
my $silent = ( defined( $options{silent} ) ? $options{silent} : 0 );
my $count = ( defined( $options{count} ) ? $options{count} : $DEF_COUNT );
my $from = $options{from};
_debug( $DEBUG >= 1, 'Host name: ' . $hostname );
_debug( $DEBUG >= 1, 'Series name: ' . $seriesname );
_debug( $DEBUG >= 1, 'Tags: ' . $tags );
#-------------------------------------------------------------------------------
# Configuration file - load data
#-------------------------------------------------------------------------------
my $conf = new Config::General(
-ConfigFile => $cfgfile,
-InterPolateVars => 1,
-ExtendedAccess => 1
);
my %config = $conf->getall();
#-------------------------------------------------------------------------------
# Connect to the database
#-------------------------------------------------------------------------------
my $dbhost = $config{database}->{host} // '127.0.0.1';
my $dbport = $config{database}->{port} // 3306;
my $dbname = $config{database}->{name};
my $dbuser = $config{database}->{user};
my $dbpwd = $config{database}->{password};
$dbh = DBI->connect( "dbi:mysql:host=$dbhost;port=$dbport;database=$dbname",
$dbuser, $dbpwd, { AutoCommit => 1 } )
or die $DBI::errstr;
#
# Enable client-side UTF8
#
$dbh->{mysql_enable_utf8} = 1;
#-------------------------------------------------------------------------------
# Find the latest show for reference purposes
#-------------------------------------------------------------------------------
$sth1 = $dbh->prepare(
# q{SELECT id, date FROM eps
# WHERE DATEDIFF(date,CURDATE()) <= 0 AND DATEDIFF(date,CURDATE()) >= -2
# ORDER BY date DESC LIMIT 1}
q{SELECT id, date FROM eps
WHERE DATEDIFF(date,CURDATE()) BETWEEN -2 AND 0
ORDER BY date DESC LIMIT 1}
);
$sth1->execute;
if ( $dbh->err ) {
warn $dbh->errstr;
}
$h1 = $sth1->fetchrow_hashref;
my $ref_date = $h1->{date};
my $ref_show = $h1->{id};
#-------------------------------------------------------------------------------
# Find the required hostid
#-------------------------------------------------------------------------------
$sth1 = $dbh->prepare(q{SELECT hostid FROM hosts WHERE host = ?});
$sth1->execute($hostname);
if ( $dbh->err ) {
warn $dbh->errstr;
}
unless ( $h1 = $sth1->fetchrow_hashref ) {
warn "Unable to find host '$hostname' - cannot continue\n";
exit 1;
}
$hostid = $h1->{hostid};
#-------------------------------------------------------------------------------
# Find the required series
#-------------------------------------------------------------------------------
$sth1 = $dbh->prepare(q{SELECT id FROM miniseries WHERE name = ?});
$sth1->execute($seriesname);
if ( $dbh->err ) {
warn $dbh->errstr;
}
unless ( $h1 = $sth1->fetchrow_hashref ) {
warn "Unable to find series '$seriesname' - cannot continue\n";
exit 1;
}
$series = $h1->{id};
_debug( $DEBUG >= 2, 'Reference date: ' . $ref_date );
_debug( $DEBUG >= 2, 'Reference show: ' . $ref_show );
_debug( $DEBUG >= 2, 'Host id: ' . $hostid );
_debug( $DEBUG >= 2, 'Series id: ' . $series );
#-------------------------------------------------------------------------------
# The start date comes from the -from=DATE option, the database or is defaulted
#-------------------------------------------------------------------------------
#
# Use the date provided or the default
#
if ( ! defined( $from ) ) {
#
# Compute the first of the current month
#
_debug($DEBUG >= 3, "From date: Default");
@startdate = ( ( Today() )[ 0 .. 1 ], 1 );
}
elsif ( $from =~ /^$/ ) {
_debug($DEBUG >= 3, "From date: Database");
@startdate = get_next_date( $dbh, $series );
}
else {
#
# Parse the date, convert to start of month
#
_debug($DEBUG >= 3, "From date: Explicit");
@startdate = convert_date( $from, 0 );
}
_debug($DEBUG >= 3,"Start date: " . ISO8601_Date(@startdate));
#-------------------------------------------------------------------------------
# Set up for date manipulation
#-------------------------------------------------------------------------------
my @cdate = @startdate;
my $monday = 1; # Day of week number 1-7, Monday-Sunday
print "Start date: ", ISO8601_Date(@startdate), "\n" unless ($silent);
#
# The reference show, taken from the database
#
my @ref_date = split( /-/, $ref_date );
print "Reference show: hpr$ref_show on ", ISO8601_Date(@ref_date), "\n\n"
unless ($silent);
#
# Prepare some SQL (Note stopgap fix for the INSERT statement associated with $sth3)
#
$sth1 = $dbh->prepare(q{SELECT id FROM eps where id = ?});
$sth2 = $dbh->prepare(q{SELECT id, date FROM eps where title = ?});
$sth3 = $dbh->prepare(
q{
INSERT INTO eps (id,date,hostid,title,summary,series,tags,
duration,notes,downloads)
VALUES(?,?,?,?,?,?,?,0,'',0)
}
);
#
# Compute a series of dates from the start date
#
for my $i ( 1 .. $count ) {
#
# Determine the next first Monday of the month and the show number that
# goes with it
#
@rdate = make_date( \@cdate, $monday, 1, 0 );
$show = $ref_show + Delta_Business_Days( @ref_date, @rdate );
_debug($DEBUG >= 3,"Date: " . ISO8601_Date(@rdate) . " Show: $show");
#
# Make the text strings for this month
#
@lastmonth = Add_Delta_YM( @rdate, 0, -1 );
$title
= sprintf( $titlefmt, Month_to_Text( $lastmonth[1] ), $lastmonth[0] );
$summary
= sprintf( $summaryfmt, Month_to_Text( $lastmonth[1] ),
$lastmonth[0] );
_debug($DEBUG >= 3,"Title: $title");
_debug($DEBUG >= 3,"Summary: $summary");
#
# Do we already have a show with this title?
#
$rv = $sth2->execute($title);
if ( $dbh->err ) {
warn $dbh->errstr;
}
if ( $rv > 0 ) {
$h2 = $sth2->fetchrow_hashref;
unless ($silent) {
printf
"Skipping; an episode already exists with title '%s' (hpr%s, %s)\n",
$title, $h2->{id}, $h2->{date};
}
@cdate = Add_Delta_YM( @cdate, 0, 1 );
next;
}
#
# Is this show number taken?
#
$rv = $sth1->execute($show);
if ( $dbh->err ) {
warn $dbh->errstr;
}
if ( $rv > 0 ) {
#
# Find a free slot
#
print "Slot $show for '$title' is allocated. " unless ($silent);
until ( $rv == 0 && ( Day_of_Week(@rdate) < 6 ) ) {
$show++ if ( Day_of_Week(@rdate) < 6 );
@rdate = Add_Delta_Days( @rdate, 1 );
$rv = $sth1->execute($show);
if ( $dbh->err ) {
warn $dbh->errstr;
}
}
print "Next free slot is $show\n" unless ($silent);
}
#
# Reserve the slot or pretend to
#
unless ($dry_run) {
$rv = $sth3->execute( $show, ISO8601_Date(@rdate), $hostid,
$title, $summary, $series, $tags );
if ( $dbh->err ) {
warn $dbh->errstr;
}
if ( $rv > 0 ) {
printf "Reserved show hpr%d on %s for '%s'\n",
$show, ISO8601_Date(@rdate), $title
unless ($silent);
}
else {
print "Error reserving slot for '$title'\n" unless ($silent);
}
}
else {
printf "Show hpr%d on %s for '%s' not reserved - dry run\n",
$show, ISO8601_Date(@rdate), $title
unless ($silent);
}
@cdate = Add_Delta_YM( @cdate, 0, 1 );
}
for my $sth ( $sth1, $sth2, $sth3 ) {
$sth->finish;
}
$dbh->disconnect;
exit;
#=== FUNCTION ================================================================
# NAME: convert_date
# PURPOSE: Convert a textual date (ideally YYYY-MM-DD) to a Date::Calc
# date for the start of the given month.
# PARAMETERS: $textdate date in text form
# $force Boolean defining whether to skip validating
# the date
# RETURNS: The start of the month in the textual date in Date::Calc
# format
# DESCRIPTION: Parses the date string and makes a Date::Calc date from the
# result where the day part is 1. Optionally checks that the
# date isn't in the past, though $force = 1 ignores this check.
# THROWS: No exceptions
# COMMENTS: Requires Date::Calc and Date::Parse
# Note the validation 'die' has a non-generic message
# SEE ALSO: N/A
#===============================================================================
sub convert_date {
my ( $textdate, $force ) = @_;
my ( @today, @parsed, @startdate );
#
# Reference date
#
@today = Today();
#
# Parse and perform rudimentary validation on the $textdate date. Function
# 'strptime' returns "($ss,$mm,$hh,$day,$month,$year,$zone,$century)".
#
# The Date::Calc date $startdate[0] gets the returned year or the current
# year if no year was parsed, $startdate[1] gets the parsed month or the
# current month if no month was parsed, and $startdate[2] gets a day of 1.
#
@parsed = strptime($textdate);
die "Unable to parse date '$textdate'\n" unless @parsed;
@startdate = (
( defined( $parsed[5] ) ? $parsed[5] + 1900 : $today[0] ), # year
( defined( $parsed[4] ) ? $parsed[4] + 1 : $today[1] ), 1
);
#
# Unless we've overridden the check there should be a positive or zero
# difference in days between the target date and today's date to prevent
# going backwards in time.
#
unless ($force) {
unless ( Delta_Days( @today[ 0, 1 ], 1, @startdate ) ge 0 ) {
warn "Invalid date $textdate (in the past)\n";
die "Use -force to create a back-dated calendar\n";
}
}
return @startdate;
}
#=== FUNCTION ================================================================
# NAME: get_next_date
# PURPOSE: Find the next unused date from the database
# PARAMETERS: $dbh Database handle
# $series The id of the Community News series (from
# a previous query)
# RETURNS: The start of the month of the next free date in Date::Calc
# format
# DESCRIPTION: Finds the latest reservation in the database. Uses the date
# associated with this reservation, converts to Date::Calc
# format, adds a month to it and ensures it's the first Monday
# of that month (in case a non-standard reservation had been
# made)
# THROWS: No exceptions
# COMMENTS: TODO: do we need the show number of the latest reservation?
# SEE ALSO: N/A
#===============================================================================
sub get_next_date {
my ( $dbh, $series ) = @_;
my ( $sth, $h );
my ( $id, $lastdate, @startdate );
#
# Find the last reservation in the database
#
$sth = $dbh->prepare( q{
SELECT id, date
FROM eps WHERE series = ?
ORDER BY id DESC LIMIT 1;
}
);
$sth->execute($series);
if ( $dbh->err ) {
warn $dbh->errstr;
}
#
# Get the values returned
#
$h = $sth->fetchrow_hashref;
$id = $h->{id};
$lastdate = $h->{date};
#
# Convert the date to Date::Calc format, increment by a month and ensure
# it's the first Monday of the month (in case the last reservation is not
# on the right day for some reason - such as the day being reserved by
# some other mechanism)
#
@startdate = convert_date( $lastdate, 0 );
@startdate = Add_Delta_YM( @startdate, 0, 1 );
@startdate = make_date( \@startdate, 1, 1, 0 );
return @startdate;
}
#=== FUNCTION ================================================================
# NAME: make_date
# PURPOSE: Make the event date for recurrence
# PARAMETERS: $refdate
# An arrayref to the reference date array (usually
# today's date)
# $dow Day of week for the event date (1-7, 1=Monday)
# $n The nth day of the week in the given month required
# for the event date ($dow=1, $n=1 means first Monday)
# $offset Number of days to offset the computed date
# RETURNS: The resulting date as a list for Date::Calc
# DESCRIPTION: We want to compute a simple date with an offset, such as
# "the Saturday before the first Monday of the month". We do
# this by computing a pre-offset date (first Monday of month)
# then apply the offset (Saturday before).
# THROWS: No exceptions
# COMMENTS: TODO Needs more testing to be considered truly universal
# SEE ALSO:
#===============================================================================
sub make_date {
my ( $refdate, $dow, $n, $offset ) = @_;
#
# Compute the required date: the "$n"th day of week "$dow" in the year and
# month in @$refdate. This could be a date in the past.
#
my @date = Nth_Weekday_of_Month_Year( @$refdate[ 0, 1 ], $dow, $n );
#
# If the computed date plus the offset is before the base date advance
# a month
#
if ( Day_of_Year(@date) + $offset < Day_of_Year(@$refdate) ) {
#
# Add a month and recompute
#
@date = Add_Delta_YM( @date, 0, 1 );
@date = Nth_Weekday_of_Month_Year( @date[ 0, 1 ], $dow, $n );
}
#
# Apply the day offset
#
@date = Add_Delta_Days( @date, $offset ) if $offset;
#
# Return a list
#
return (@date);
}
#=== FUNCTION ================================================================
# NAME: Delta_Business_Days
# PURPOSE: Computes the number of weekdays between two dates
# PARAMETERS: @date1 - first date in Date::Calc format
# @date2 - second date in Date::Calc format
# RETURNS: The business day offset
# DESCRIPTION: This is a direct copy of the routine of the same name on the
# Date::Calc manpage.
# THROWS: No exceptions
# COMMENTS: Lifted from the manpage for Date::Calc
# SEE ALSO: N/A
#===============================================================================
sub Delta_Business_Days {
my (@date1) = (@_)[ 0, 1, 2 ];
my (@date2) = (@_)[ 3, 4, 5 ];
my ( $minus, $result, $dow1, $dow2, $diff, $temp );
$minus = 0;
$result = Delta_Days( @date1, @date2 );
if ( $result != 0 ) {
if ( $result < 0 ) {
$minus = 1;
$result = -$result;
$dow1 = Day_of_Week(@date2);
$dow2 = Day_of_Week(@date1);
}
else {
$dow1 = Day_of_Week(@date1);
$dow2 = Day_of_Week(@date2);
}
$diff = $dow2 - $dow1;
$temp = $result;
if ( $diff != 0 ) {
if ( $diff < 0 ) {
$diff += 7;
}
$temp -= $diff;
$dow1 += $diff;
if ( $dow1 > 6 ) {
$result--;
if ( $dow1 > 7 ) {
$result--;
}
}
}
if ( $temp != 0 ) {
$temp /= 7;
$result -= ( $temp << 1 );
}
}
if ($minus) { return -$result; }
else { return $result; }
}
#=== FUNCTION ================================================================
# NAME: ISO8601_Date
# PURPOSE: Format a Date::Calc date in ISO8601 format
# PARAMETERS: @date - a date in the Date::Calc format
# RETURNS: Text string containing a YYYY-MM-DD date
# DESCRIPTION: Just a convenience to allow a simple call like
# $str = ISO8601_Date(@date)
# THROWS: No exceptions
# COMMENTS: None
# SEE ALSO: N/A
#===============================================================================
sub ISO8601_Date {
my (@date) = (@_)[ 0, 1, 2 ];
if ( check_date(@date) ) {
return sprintf( "%04d-%02d-%02d", @date );
}
else {
return "*Invalid Date*";
}
}
#=== FUNCTION ================================================================
# NAME: _debug
# PURPOSE: Prints debug reports
# PARAMETERS: $active Boolean: 1 for print, 0 for no print
# $message Message to print
# RETURNS: Nothing
# DESCRIPTION: Outputs a message if $active is true. It removes any trailing
# newline and then adds one in the 'print' to the caller doesn't
# have to bother. Prepends the message with 'D> ' to show it's
# a debug message.
# THROWS: No exceptions
# COMMENTS: None
# SEE ALSO: N/A
#===============================================================================
sub _debug {
my ( $active, $message ) = @_;
chomp($message);
print "D> $message\n" if $active;
}
#=== FUNCTION ================================================================
# NAME: Options
# PURPOSE: Processes command-line options
# PARAMETERS: $optref Hash reference to hold the options
# RETURNS: Undef
# DESCRIPTION:
# THROWS: no exceptions
# COMMENTS: none
# SEE ALSO: n/a
#===============================================================================
sub Options {
my ($optref) = @_;
my @options = (
"help", "debug=i", "config=s", "from:s",
"count=i", "dry-run!", "silent!",
);
if ( !GetOptions( $optref, @options ) ) {
pod2usage( -msg => "$PROG version $VERSION\n", -exitval => 1 );
}
return;
}
__END__
#%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
# Application Documentation
#%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
#{{{
=head1 NAME
reserve_cnews - reserve Community News shows in the HPR database
=head1 VERSION
This documentation refers to B<reserve_cnews> version 0.0.14
=head1 USAGE
./reserve_cnews [-help] [-from[=DATE]] [-count=COUNT]
[-[no]dry-run] [-[no]silent] [-config=FILE] [-debug=N]
Examples:
./reserve_cnews -help
./reserve_cnews
./reserve_cnews -from=1-June-2014 -dry-run
./reserve_cnews -from=15-Aug-2015 -count=6
./reserve_cnews -from=2015-12-06 -count=1 -silent
./reserve_cnews -from -count=1
./reserve_cnews -from -count=2 -debug=4
./reserve_cnews -config=.hpr_livedb.cfg -from=1-March-2019 -dry-run
=head1 OPTIONS
=over 8
=item B<-help>
Prints a brief help message describing the usage of the program, and then exits.
=item B<-from=DATE> or B<-from>
This option defines the starting date from which reservations are to be
created. The program ignores the day part, though it must be provided, and
replaces it with the first day of the month.
The date format should be B<DD-Mon-YYYY> (e.g. 12-Jun-2014), B<DD-MM-YYYY>
(e.g. 12-06-2014) or B<YYYY-MM-DD> (e.g. 2014-06-12).
If this option is omitted the current date is used.
If the B<DATE> part is omitted the script will search the database for the
reservation with the latest date and will use it as the starting point to
generate B<-count=COUNT> (or the default 12) reservations.
=item B<-count=COUNT>
This option defines the number of slots to reserve.
If this option is omitted then 12 slots are reserved.
=item B<-[no]dry-run>
This option in the form B<-dry-run> causes the program omit the step of adding
reservations to the database. In the form B<-nodry-run> or if omitted, the
program will perform the update(s).
=item B<-[no]silent>
This option in the form B<-silent> causes the program omit the reporting of
what it has done. In the form B<-nosilent> or if omitted, the program will
report what it is doing.
=item B<-config=FILE>
This option defines a configuration file other than the default
I<.hpr_db.cfg>. The file must be formatted as described below in the section
I<CONFIGURATION AND ENVIRONMENT>.
=item B<-debug=N>
Sets the level of debugging. The default is 0: no debugging.
Values are:
=over 4
=item 1
Produces details of some of the built-in values used.
=item 2
Produces any output defined for lower levels as well as details of the values
taken from the database for use when reserving the show(s).
=item 3
Produces any output defined for lower levels as well as:
=over 4
=item .
Details of how the `-from` date is being interpreted: default, computed from
the database or explicit. The actual date being used is reported.
=item .
Details of all dates chosen and their associated sho numbers using the
algorithm "first Monday of the month".
=item .
The show title chosen for each reservation is displayed as well as the summary.
=back
=back
=back
=head1 DESCRIPTION
Hacker Public Radio produces a Community News show every month. The show is
recorded on the Saturday before the first Monday of the month, and should be
released as soon as possible afterwards.
This program reserves future slots in the database for upcoming shows. It
computes the date of the first Monday of all of the months in the requested
sequence then determines which show number matches that date. It writes rows
into the I<reservations> table containing the episode number, the host
identifier ('HPR Admins') and the reason for the reservation.
It is possible that an HPR host has already requested the slot that this
program determines it should reserve. When this happens the program increments
the episode number and checks again, and repeats this process until a free
slot is discovered.
It is also possible that a reservation has previously been made in the
I<reservations> table. When this case occurs the program ignores this
particular reservation.
=head1 DIAGNOSTICS
=over 8
=item B<Invalid date ...>
The date element of the B<-from=DATE> option is not valid. See the description
of this option for details of what formats are acceptable.
=item B<Various database messages>
The program can generate warning messages from the database.
=item B<Unable to find host '...' - cannot continue>
The script needs to find the id number relating to the host that will be used
for Community News episodes. It does this by looking in the hosts table for
the name "HPR Volunteers". If this cannot be found, perhaps because it has
been changed, then the script cannot continue. The remedy is to change the
variable $hostname to match the new name.
=item B<Unable to find series '...' - cannot continue>
The script needs to find the id number relating to the series that will be
used for Community News episodes. It does this by looking in the miniseries
table for the name "HPR Community News". If this cannot be found, perhaps
because it has been changed, then the script cannot continue. The remedy is to
change the variable $seriesname to match the new name.
=back
=head1 CONFIGURATION AND ENVIRONMENT
The program obtains the credentials it requires for connecting to the HPR
database by loading them from a configuration file. The file is called
B<.hpr_db.cfg> and should contain the following data:
<database>
host = 127.0.0.1
port = PORT
name = DBNAME
user = USER
password = PASSWORD
</database>
=head1 DEPENDENCIES
Config::General
Data::Dumper
Date::Calc
Date::Parse
DBI
Getopt::Long
Pod::Usage
=head1 BUGS AND LIMITATIONS
There are no known bugs in this module.
Please report problems to Dave Morriss (Dave.Morriss@gmail.com)
Patches are welcome.
=head1 AUTHOR
Dave Morriss (Dave.Morriss@gmail.com)
=head1 LICENCE AND COPYRIGHT
Copyright (c) 2014 - 2023 Dave Morriss (Dave.Morriss@gmail.com). All
rights reserved.
This module is free software; you can redistribute it and/or
modify it under the same terms as Perl itself. See perldoc perlartistic.
=cut
#}}}
# [zo to open fold, zc to close]
# vim: syntax=perl:ts=8:sw=4:et:ai:tw=78:fo=tcrqn21:fdm=marker
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