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<?php

class Taxonomy_Drill_Down_Widget extends scbWidget {

protected $defaults = array(
'title' => '',
'mode' => 'lists',
'taxonomies' => array(),
);

static function init( $file ) {
parent::init( __CLASS__, $file, 'taxonomy-drill-down' );

if ( !class_exists( 'Mustache' ) )
require dirname(__FILE__) . '/mustache/Mustache.php';

add_action( 'load-widgets.php', array( __CLASS__, '_init' ) );
}

static function _init() {
add_action( 'admin_print_styles', array( __CLASS__, 'add_style' ), 11 );
add_action( 'admin_footer', array( __CLASS__, 'add_script' ), 11 );
}

function __construct() {
parent::__construct(
'taxonomy-drill-down',
__( 'Taxonomy Drill-Down', 'query-multiple-taxonomies' ),
array(
'description' => __( 'Display a drill-down navigation based on custom taxonomies', 'query-multiple-taxonomies' )
)
);
}

function add_style() {
?>
<style type="text/css">
.qmt-taxonomies {
margin: -.5em 0 0 .5em;
cursor: move;
}
</style>
<?php
}

function add_script() {
?>
<script type="text/javascript">
jQuery(function($){
$(document).delegate('.qmt-taxonomies', 'mouseenter', function(ev) {
$(this).sortable();
$(this).disableSelection();
});
});
</script>
<?php
}

function form( $instance ) {
if ( empty( $instance ) )
$instance = $this->defaults;

$data = array(
'title-input' => $this->input( array(
'name' => 'title',
'type' => 'text',
'desc' => __( 'Title:', 'query-multiple-taxonomies' ),
'extra' => array( 'class' => 'widefat' )
), $instance ),

'mode-input' => $this->input( array(
'type' => 'select',
'name' => 'mode',
'values' => array(
'lists' => __( 'lists', 'query-multiple-taxonomies' ),
'checkboxes' => __( 'checkboxes', 'query-multiple-taxonomies' ),
'dropdowns' => __( 'dropdowns', 'query-multiple-taxonomies' ),
),
'text' => false,
'desc' => __( 'Mode:', 'query-multiple-taxonomies' ),
'extra' => array( 'class' => 'widefat' )
), $instance ),

'taxonomies-label' => __( 'Taxonomies:', 'query-multiple-taxonomies' )
);

$selected_taxonomies = $instance['taxonomies'];

// Start with the selected taxonomies
$tax_list = $selected_taxonomies;

// Append the other taxonomies
foreach ( get_taxonomies() as $tax_name ) {
if ( !in_array( $tax_name, $selected_taxonomies ) )
$tax_list[] = $tax_name;
}

foreach ( $tax_list as $tax_name ) {
$tax_obj = self::test_tax( $tax_name );

if ( !$tax_obj )
continue;

$data['taxonomies'][] = array(
'title' => sprintf( _n( 'Post type: %s', 'Post types: %s', count( $tax_obj->object_type ), 'query-multiple-taxonomies' ), implode( ', ', $tax_obj->object_type ) ),
'input' => $this->input( array(
'type' => 'checkbox',
'name' => 'taxonomies[]',
'value' => $tax_name,
'checked'=> in_array( $tax_name, $selected_taxonomies ),
'desc' => $tax_obj->label,
) )
);
}

$m = new Mustache;
echo $m->render( file_get_contents( dirname(__FILE__) . '/widget.html' ), $data );
}

function content( $instance ) {
extract( $instance );

$taxonomies = array_filter( $taxonomies, array( __CLASS__, 'test_tax' ) );

$query = qmt_get_query();
$common = array_intersect( $taxonomies, array_keys( $query ) );
$this->all_terms = empty( $common );

if ( empty( $taxonomies ) ) {
echo
html( 'p', __( 'No taxonomies selected!', 'query-multiple-taxonomies' ) );
} else {
echo call_user_func( array( __CLASS__, "generate_$mode" ), $taxonomies, array(
'reset-text' => __( 'Reset', 'query-multiple-taxonomies' ),
'reset-url' => QMT_URL::get(),
) );
}
}

private function get_terms( $tax ) {
if ( is_taxonomy_hierarchical( $tax ) || $this->all_terms )
return get_terms( $tax );
else
return QMT_Terms::get( $tax );
}

private function generate_lists( $taxonomies, $data ) {
$query = qmt_get_query();

foreach ( $taxonomies as $taxonomy ) {
$terms = $this->get_terms( $taxonomy );

if ( empty( $terms ) )
continue;

$walker = new QMT_List_Walker( $taxonomy, 'list' );

$data_tax = array(
'taxonomy' => $taxonomy,
'title' => get_taxonomy( $taxonomy )->label,
'term-list' => $walker->walk( $terms, 0 )
);

if ( isset( $query[$taxonomy] ) ) {
$data_tax['clear'] = array(
'url' => QMT_URL::for_tax( $taxonomy, '' ),
'title' => __( 'Remove selected terms in group', 'query-multiple-taxonomies' )
);
}

$data['taxonomy'][] = $data_tax;
}

return self::mustache_render( 'lists.html', $data );
}

private function generate_dropdowns( $taxonomies, $data ) {
$data = array_merge( $data, array(
'base-url' => QMT_URL::get_base(),
'submit-text' => __( 'Submit', 'query-multiple-taxonomies' ),
'any-text' => '&mdash; ' . __( 'any', 'query-multiple-taxonomies' ) . ' &mdash;',
) );

foreach ( $taxonomies as $taxonomy ) {
$terms = get_terms( $taxonomy );

if ( empty( $terms ) )
continue;

$walker = new qmt_dropdown_walker( $taxonomy, 'dropdown' );

$data['taxonomy'][] = array(
'name' => get_taxonomy( $taxonomy )->query_var,
'title' => get_taxonomy( $taxonomy )->label,
'term-list' => $walker->walk( $terms, 0 )
);
}

if ( empty( $data['taxonomy'] ) )
return '';

return self::mustache_render( 'dropdowns.html', $data );
}

private function generate_checkboxes( $taxonomies, $data ) {
$data = array_merge( $data, array(
'base-url' => QMT_URL::get_base(),
'submit-text' => __( 'Submit', 'query-multiple-taxonomies' ),
) );

foreach ( $taxonomies as $taxonomy ) {
$terms = $this->get_terms( $taxonomy );

if ( empty( $terms ) )
continue;

$walker = new QMT_Checkboxes_Walker( $taxonomy, 'checkbox' );

$data['taxonomy'][] = array(
'taxonomy' => $taxonomy,
'title' => get_taxonomy( $taxonomy )->label,
'term-list' => $walker->walk( $terms, 0 )
);
}

return self::mustache_render( 'checkboxes.html', $data );
}

static function test_tax( $tax_name ) {
$tax_obj = get_taxonomy( $tax_name );

if ( $tax_obj && $tax_obj->public && $tax_obj->query_var )
return $tax_obj;

return false;
}

static function mustache_render( $file, $data ) {
$template_path = locate_template( 'qmt-templates/' . $file );
if ( !$template_path )
$template_path = dirname(__FILE__) . '/templates/' . $file;

$m = new Mustache;
return $m->render( file_get_contents( $template_path ), $data );
}
}

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