#!/usr/bin/perl
package IkiWiki::Plugin::cutpaste;

use warnings;
use strict;
use IkiWiki 3.00;

my %savedtext;

sub import {
	hook(type => "getsetup", id => "cutpaste", call => \&getsetup);
	hook(type => "preprocess", id => "cut", call => \&preprocess_cut, scan => 1);
	hook(type => "preprocess", id => "copy", call => \&preprocess_copy, scan => 1);
	hook(type => "preprocess", id => "paste", call => \&preprocess_paste);
}

sub getsetup () {
	return
		plugin => {
			safe => 1,
			rebuild => undef,
		},
}

sub preprocess_cut (@) {
	my %params=@_;

	foreach my $param (qw{id text}) {
		if (! exists $params{$param}) {
			error sprintf(gettext('%s parameter is required'), $param);
		}
	}

	$savedtext{$params{page}} = {} if not exists $savedtext{$params{"page"}};
	$savedtext{$params{page}}->{$params{id}} = $params{text};

	return "" if defined wantarray;
}

sub preprocess_copy (@) {
	my %params=@_;

	foreach my $param (qw{id text}) {
		if (! exists $params{$param}) {
			error sprintf(gettext('%s parameter is required'), $param);
		}
	}

	$savedtext{$params{page}} = {} if not exists $savedtext{$params{"page"}};
	$savedtext{$params{page}}->{$params{id}} = $params{text};

	return IkiWiki::preprocess($params{page}, $params{destpage}, 
		IkiWiki::filter($params{page}, $params{destpage}, $params{text})) if defined wantarray;
}

sub preprocess_paste (@) {
	my %params=@_;

	foreach my $param (qw{id}) {
		if (! exists $params{$param}) {
			error sprintf(gettext('%s parameter is required'), $param);
		}
	}

	if (! exists $savedtext{$params{page}}) {
		error gettext('no text was copied in this page');
	}
	if (! exists $savedtext{$params{page}}->{$params{id}}) {
		error sprintf(gettext('no text was copied in this page with id %s'), $params{id});
	}

	return IkiWiki::preprocess($params{page}, $params{destpage}, 
		IkiWiki::filter($params{page}, $params{destpage}, $savedtext{$params{page}}->{$params{id}}));
}

1;