%# BEGIN BPS TAGGED BLOCK {{{
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%# This software is Copyright (c) 1996-2014 Best Practical Solutions, LLC
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%# General Public License for more details.
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%# END BPS TAGGED BLOCK }}}
%# The SelectionBox Widget
%# 
%# SYNOPSIS
%#
%# include javascript:
%# <& /Widgets/SelectionBox:header &>
%#
%# <%init>:
%# my $sel = $m->comp ('/Widgets/SelectionBox:new',
%#		  Action => me.html',
%#		  Name => 'my-selection',
%#		  Available => \@items,
%#                # you can do things with @{$sel->{Current}} in the 
%#                # OnSubmit callback
%#		  OnSubmit => sub { my $sel = shift; },
%#		  Selected => \@selected);
%#
%# $m->comp ('/Widgets/SelectionBox:process', %ARGS, self => $sel)
%#
%# where @items is an arrayref, each element is [value, label],
%# and @selected is an arrayref of selected values from @items.
%#
%# and in html:
%# <& /Widgets/SelectionBox:show, self => $sel &>
%#
%# if the SelectionBox is created with AutoSave option, OnSubmit will be called
%# on every button clicked in non-js mode.
<%method header>
% unless ($nojs) {
<script type="text/javascript" src="<%RT->Config->Get('WebPath')%>/NoAuth/js/class.js"></script>
<script type="text/javascript" src="<%RT->Config->Get('WebPath')%>/NoAuth/js/list.js"></script>
% }
<%ARGS>
$nojs => 0
</%ARGS>
</%method>

<%method new>
<%init>
$ARGS{_item_map} = {map {$_->[0] => $_->[1]} @{$ARGS{Available}}};
return \%ARGS;
</%init>
</%method>

<%method process>
<%init>
unless ($ARGS{$self->{Name}.'-Submit'}) {
    # init
    $self->{Current} = $self->{Selected};
    $self->{Selected} = [];
    return;
}

$self->{Selected} = $ARGS{$self->{Name}.'-Selected'};
if ($self->{Selected} && !ref($self->{Selected})) {
    $self->{Selected} = [$self->{Selected}];
}

if ($ARGS{fromjs}) {
    $self->{Current} = $self->{Selected};
}
else {
    my $current = $self->{Current} = $ARGS{$self->{Name}.'-Current'};
    if ($current && !ref ($current)) {
        $current = [$current];
    }

    unless ($self->{ReadOnly}) {
        ++$self->{Modified};
        if ($ARGS{add}) {
            my $choosed = $ARGS{$self->{Name}.'-Available'};
            for my $add (ref($choosed) ? @$choosed : $choosed) {
                next if grep { $_ eq $add } @$current;
                push @$current, $add;
            }
        }

        if ($ARGS{remove}) {
            my $choosed = $ARGS{$self->{Name}.'-Selected'};
            for my $del (ref($choosed) ? @$choosed : $choosed) {
                @$current = map { $_ eq $del ? () : $_ } @$current;
            }
        }

        if ($ARGS{moveup} or $ARGS{movedown}) {
            my $offset = $ARGS{moveup} ? 1 : 0;
            my $choosed = $ARGS{$self->{Name}.'-Selected'};
            $choosed = [$choosed] unless ref ($choosed);
            my $canmove = 0; # not in the cornor
            for my $i ($ARGS{moveup} ? 0..$#{$current} : reverse 0..$#{$current}) {
                if (grep {$_ eq $current->[$i]} @$choosed) {
                if ($canmove) {
                    splice (@$current, $i-$offset, 2,
                        @{$current}[$i+1-$offset,$i-$offset]);
                }
                }
                else {
                ++$canmove;
                }
            }
        }

        if ($ARGS{clear}) {
            $current = [];
        }

        $self->{Current} = $current;
    }
}

@{$self->{Current}} = grep { exists $self->{_item_map}{$_} } @{$self->{Current}};

if ($self->{AutoSave} or $ARGS{$self->{Name}.'-Save'}) {
    $self->{OnSubmit}->($self);
    delete $self->{Modified};
}

</%init>
<%ARGS>
$self => undef
</%ARGS>

</%method>

<%method current>
% for (@{$self->{Current}}) {
<input type="hidden" class="hidden" name="<% $self->{Name} %>-Current" value="<%$_%>" />
% }
<%INIT>
</%INIT>
<%ARGS>
$self => undef
</%ARGS>

</%method>

<%method show>
<form method="post" action="<%$self->{Action}%>" name="SelectionBox-<% $name %>" id="SelectionBox-<% $name %>"
% unless ($nojs) {
onsubmit="list_<% $name %>.selectAll();"
% }
>
<input type="hidden" class="hidden" name="<% $self->{Name} %>-Submit" value="1" />
<& SelectionBox:current, self => $self &>
<input type="hidden" class="hidden" name="fromjs" value="0" />
<&|/l&>Available</&>:
<br />
<select name="<%$name%>-Available" id="<%$name%>-Available" size="<%$size%>" multiple="multiple">
% for (@{$self->{Available}}) {
<option value="<% $_->[0] %>"><% $_->[1] %></option>
% }
</select>

% unless ($self->{ReadOnly}) {
<input name="add" type="submit" class="button" value=" &rarr; " />
% }

<select name="<%$name%>-Selected" id="<%$name%>-Selected" size="<%$size%>" multiple="multiple">
% for (@{$self->{Current}}) {
<option value="<% $_ %>"
% if (exists $selected{$_}) {
selected="selected"
% }
><% $self->{_item_map}{$_} ||'' %></option>
% }
</select>
% unless ($self->{'ReadOnly'}) {
% unless ($ARGS{'NoArrows'}) {
 <input name="moveup" type="submit" class="button" value=" &uarr; " />
 <input name="movedown" type="submit" class="button" value=" &darr; " />
% }
 <input name="remove" type="submit" class="button" value="<&|/l&>Delete</&>" />
% if ($ARGS{'Clear'}) {
 <input name="clear" type="submit" class="button" value="<&|/l&>Clear</&>" />
% }
% if ( $ARGS{'ShowUpdate'} ) {
 <input name="update" type="submit" class="button" value="<&|/l&>Update</&>" />
% }
% }

% my $caption = "";
% unless ($self->{'AutoSave'}) {
% if ($self->{Modified}) {
% $caption = loc('Selections modified. Please save your changes');
% }
<& /Elements/Submit, Caption => loc($caption), Label => loc('Save'), Name => $name.'-Save' &>
% }
</form>

% unless ($nojs) {
<script type="text/javascript">
//<![CDATA[
var list_<%$name%> = new list(document.getElementById("SelectionBox-<% $name %>"), 0, "list_<%$name%>");
//]]>
</script>
% }
<%ARGS>
$self => undef
$size => 10
$nojs => 0
</%ARGS>
<%INIT>
my $name = $self->{Name};
my %selected = map {$_ => 1} @{$self->{Selected}};
</%INIT>

</%method>
