<?php
/*
Plugin Name: Display widgets
Plugin URI: http://strategy11.com/display-widgets/
Description: Adds checkboxes to each widget to show or hide on site pages.
Author: Strategy11
Author URI: http://strategy11.com
Version: 1.24
*/

load_plugin_textdomain( 'display-widgets', false, dirname( plugin_basename( __FILE__ ) ) . '/languages/' );

add_filter('widget_display_callback', 'show_dw_widget');
add_action('in_widget_form', 'dw_show_hide_widget_options', 10, 3);
add_filter('widget_update_callback', 'dw_update_widget_options', 10, 3);

function show_dw_widget($instance){
    global $wp_query;
    $post_id = $wp_query->get_queried_object_id();
    $post_id = dw_get_lang_id($post_id, 'page');
    
    if(defined('ICL_LANGUAGE_CODE'))
        $show = isset($instance['lang-'. ICL_LANGUAGE_CODE]) ? ($instance['lang-'. ICL_LANGUAGE_CODE]) : false;

    if (is_home()){
        $show = isset($instance['page-home']) ? ($instance['page-home']) : false;
    }else if (is_front_page()){
        $show = isset($instance['page-front']) ? ($instance['page-front']) : false;
    }else if (is_category()){
        $show = isset($instance['cat-'. get_query_var('cat')]) ? ($instance['cat-'. get_query_var('cat')]) : false;
    }else if(is_tax()){
        $term = get_queried_object();
        $show = isset($instance['tax-'. $term->taxonomy]) ? ($instance['tax-'. $term->taxonomy]) : false;
        unset($term);
    }else if (is_archive()){
        $show = isset($instance['page-archive']) ? ($instance['page-archive']) : false;
        if (!$show) {
            if(function_exists('get_post_type')){
                $type = get_post_type();
                $show = isset($instance['type-'. $type.'-archive']) ? ($instance['type-'. $type.'-archive']) : false;
            }
        }

    }else if (is_single()){
        if(function_exists('get_post_type')){
            $type = get_post_type();
            if($type != 'page' and $type != 'post')
                $show = isset($instance['type-'. $type]) ? ($instance['type-'. $type]) : false;
        }
        
        if(!isset($show))
            $show = isset($instance['page-single']) ? ($instance['page-single']) : false;
            
        if (!$show){
            $cats = get_the_category();
            foreach($cats as $cat){ 
                if ($show) continue;
                $cat_id = dw_get_lang_id($cat->cat_ID, 'category');
                if (isset($instance['cat-'. $cat_id]))
                    $show = $instance['cat-'. $cat_id];
            } 
        }
    }else if (is_404()){ 
        $show = isset($instance['page-404']) ? ($instance['page-404']) : false;
    }else if (is_search()){
        $show = isset($instance['page-search']) ? ($instance['page-search']) : false;
    }else if($post_id){
        $show = isset($instance['page-'. $post_id]) ? ($instance['page-'. $post_id]) : false;
    }
        
    if ($post_id and !$show and isset($instance['other_ids']) and !empty($instance['other_ids'])){
        $other_ids = explode(',', $instance['other_ids']);
        foreach($other_ids as $other_id){
            if($post_id == (int)$other_id)
                $show = true;
        }
    }
    
    if(!isset($show))
        $show = false;
        
    $instance['dw_include'] = isset($instance['dw_include']) ? $instance['dw_include'] : (isset($instance['include']) ? $instance['include'] : 0);
    $instance['dw_logout'] = isset($instance['dw_logout']) ? $instance['dw_logout'] : (isset($instance['logout']) ? $instance['logout'] : 0);
    $instance['dw_login'] = isset($instance['dw_login']) ? $instance['dw_login'] : (isset($instance['login']) ? $instance['login'] : 0);

    if (($instance['dw_include'] and $show == false) or ($instance['dw_include'] == 0 and $show)){
        return false;
    }else{
        global $user_ID;
        if( (isset($instance['dw_logout']) and $instance['dw_logout'] and $user_ID) or 
            (isset($instance['dw_login']) and $instance['dw_login'] and !$user_ID))
            return false;
            
    }

	return $instance;
}

function dw_show_hide_widget_options($widget, $return, $instance){
    dw_register_globals();
    
    global $dw_pages, $dw_cats, $dw_taxes, $dw_cposts, $dw_checked, $dw_loaded, $dw_langs;

    $wp_page_types = array(
        'front' => __('Front', 'display-widgets'), 
        'home' => __('Blog', 'display-widgets'),
        'archive' => __('Archives', 'display-widgets'),
        'single' => __('Single Post', 'display-widgets'),
        '404' => '404', 'search' => __('Search', 'display-widgets')
    );
            
    $instance['dw_include'] = isset($instance['dw_include']) ? $instance['dw_include'] : (isset($instance['include']) ? $instance['include'] : 0);
    $instance['dw_logout'] = isset($instance['dw_logout']) ? $instance['dw_logout'] : (isset($instance['logout']) ? $instance['logout'] : 0);
    $instance['dw_login'] = isset($instance['dw_login']) ? $instance['dw_login'] : (isset($instance['login']) ? $instance['login'] : 0);
    $instance['other_ids'] = isset($instance['other_ids']) ? $instance['other_ids'] : '';
?>   
     <p>
    	<label for="<?php echo $widget->get_field_id('dw_include'); ?>"><?php _e('Show/Hide Widget', 'display-widgets') ?></label>
    	<select name="<?php echo $widget->get_field_name('dw_include'); ?>" id="<?php echo $widget->get_field_id('dw_include'); ?>" class="widefat">
            <option value="0"><?php _e('Hide on checked', 'display-widgets') ?></option> 
            <option value="1" <?php echo selected( $instance['dw_include'], 1 ) ?>><?php _e('Show on checked', 'display-widgets') ?></option>
        </select>
    </p>    

<div style="height:150px; overflow:auto; border:1px solid #dfdfdf;">
    <p><input class="checkbox" type="checkbox" <?php checked($instance['dw_logout'], true) ?> id="<?php echo $widget->get_field_id('dw_logout'); ?>" name="<?php echo $widget->get_field_name('dw_logout'); ?>" value="1" />
    <label for="<?php echo $widget->get_field_id('dw_logout'); ?>"><?php _e('Show only for Logged-out users', 'display-widgets') ?></label></p>
    <p><input class="checkbox" type="checkbox" <?php checked($instance['dw_login'], true) ?> id="<?php echo $widget->get_field_id('dw_login'); ?>" name="<?php echo $widget->get_field_name('dw_login'); ?>" value="1" />
    <label for="<?php echo $widget->get_field_id('dw_login'); ?>"><?php _e('Show only for Logged-in users', 'display-widgets') ?></label></p>
    
    <h4 onclick="dw_toggle(jQuery(this))" style="cursor:pointer;"><?php _e('Miscellaneous', 'display-widgets') ?> +/-</h4>
    <div class="dw_collapse">
    <?php foreach ($wp_page_types as $key => $label){ 
        $instance['page-'. $key] = isset($instance['page-'. $key]) ? $instance['page-'. $key] : false;
    ?>
        <p><input class="checkbox" type="checkbox" <?php checked($instance['page-'. $key], true) ?> id="<?php echo $widget->get_field_id('page-'. $key); ?>" name="<?php echo $widget->get_field_name('page-'. $key); ?>" />
        <label for="<?php echo $widget->get_field_id('page-'. $key); ?>"><?php echo $label .' '. __('Page', 'display-widgets') ?></label></p>
    <?php } ?>
    </div>
    
    <h4 onclick="dw_toggle(jQuery(this))" style="cursor:pointer;"><?php _e('Pages', 'display-widgets') ?> +/-</h4>
    <div class="dw_collapse">
    <?php foreach ($dw_pages as $page){ 
        $instance['page-'. $page->ID] = isset($instance['page-'. $page->ID]) ? $instance['page-'. $page->ID] : false;   
    ?>
        <p><input class="checkbox" type="checkbox" <?php checked($instance['page-'. $page->ID], true) ?> id="<?php echo $widget->get_field_id('page-'. $page->ID); ?>" name="<?php echo $widget->get_field_name('page-'. $page->ID); ?>" />
        <label for="<?php echo $widget->get_field_id('page-'. $page->ID); ?>"><?php echo $page->post_title ?></label></p>
    <?php	}  ?>
    </div>
    
    <?php if(isset($dw_cposts) and !empty($dw_cposts)){ ?>
    <h4 onclick="dw_toggle(jQuery(this))" style="cursor:pointer;"><?php _e('Custom Post Types', 'display-widgets') ?> +/-</h4>
    <div class="dw_collapse">
    <?php foreach ($dw_cposts as $post_key => $custom_post){ 
        $instance['type-'. $post_key] = isset($instance['type-'. $post_key]) ? $instance['type-'. $post_key] : false;
    ?>
        <p><input class="checkbox" type="checkbox" <?php checked($instance['type-'. $post_key], true) ?> id="<?php echo $widget->get_field_id('type-'. $post_key); ?>" name="<?php echo $widget->get_field_name('type-'. $post_key); ?>" />
        <label for="<?php echo $widget->get_field_id('type-'. $post_key); ?>"><?php echo stripslashes($custom_post->labels->name) ?></label></p>
    <?php } ?>
    </div>
    <?php } ?>

    <?php if(isset($dw_cposts) and !empty($dw_cposts)){ ?>
    <h4 onclick="dw_toggle(jQuery(this))" style="cursor:pointer;"><?php _e('Custom Post Type Archives', 'display-widgets') ?> +/-</h4>
    <div class="dw_collapse">
    <?php foreach ($dw_cposts as $post_key => $custom_post){ 
        $instance['type-'. $post_key.'-archive'] = isset($instance['type-'. $post_key.'-archive']) ? $instance['type-'. $post_key.'-archive'] : false;
    ?>
        <p><input class="checkbox" type="checkbox" <?php checked($instance['type-'. $post_key.'-archive'], true) ?> id="<?php echo $widget->get_field_id('type-'. $post_key.'-archive'); ?>" name="<?php echo $widget->get_field_name('type-'. $post_key.'-archive'); ?>" />
        <label for="<?php echo $widget->get_field_id('type-'. $post_key.'-archive'); ?>"><?php echo stripslashes($custom_post->labels->name) ?> Archive</label></p>
    <?php } ?>
    </div>
    <?php } ?>
    
    <h4 onclick="dw_toggle(jQuery(this))" style="cursor:pointer;"><?php _e('Categories', 'display-widgets') ?> +/-</h4>
    <div class="dw_collapse">
    <?php foreach ($dw_cats as $cat){ 
        $instance['cat-'. $cat->cat_ID] = isset($instance['cat-'. $cat->cat_ID]) ? $instance['cat-'. $cat->cat_ID] : false;   
    ?>
        <p><input class="checkbox" type="checkbox" <?php checked($instance['cat-'. $cat->cat_ID], true) ?> id="<?php echo $widget->get_field_id('cat-'. $cat->cat_ID); ?>" name="<?php echo $widget->get_field_name('cat-'. $cat->cat_ID); ?>" />
        <label for="<?php echo $widget->get_field_id('cat-'. $cat->cat_ID); ?>"><?php echo $cat->cat_name ?></label></p>
    <?php
        unset($cat);
        } 
    ?>
    </div>
    
    <?php if(!empty($dw_taxes)){ ?>
    <h4 onclick="dw_toggle(jQuery(this))" style="cursor:pointer;"><?php _e('Taxonomies', 'display-widgets') ?> +/-</h4>
    <div class="dw_collapse">
    <?php foreach ($dw_taxes as $tax){ 
        $instance['tax-'. $tax] = isset($instance['tax-'. $tax]) ? $instance['tax-'. $tax] : false;   
    ?>
        <p><input class="checkbox" type="checkbox" <?php checked($instance['tax-'. $tax], true) ?> id="<?php echo $widget->get_field_id('tax-'. $tax); ?>" name="<?php echo $widget->get_field_name('tax-'. $tax); ?>" />
        <label for="<?php echo $widget->get_field_id('tax-'. $tax); ?>"><?php echo str_replace(array('_','-'), ' ', ucfirst($tax)) ?></label></p>
    <?php
        unset($tax);
        } 
    ?>
    </div>
    <?php } ?>
    
    <?php if(isset($dw_langs) and !empty($dw_langs)){ ?>
    <h4 onclick="dw_toggle(jQuery(this))" style="cursor:pointer;"><?php _e('Languages', 'display-widgets') ?> +/-</h4>
    <div class="dw_collapse">
    <?php foreach($dw_langs as $lang){
		$key = $lang['language_code'];
     	$instance['lang-'. $key] = isset($instance['lang-'. $key]) ? $instance['lang-'. $key] : false;
    ?>
        <p><input class="checkbox" type="checkbox" <?php checked($instance['lang-'. $key], true) ?> id="<?php echo $widget->get_field_id('lang-'. $key); ?>" name="<?php echo $widget->get_field_name('lang-'. $key); ?>" />
        <label for="<?php echo $widget->get_field_id('lang-'. $key); ?>"><?php echo $lang['native_name'] ?></label></p>
       
    <?php 
        unset($lang);
        unset($key);
        } 
    ?>
    </div>
    <?php } ?>
    
    <p><label for="<?php echo $widget->get_field_id('other_ids'); ?>"><?php _e('Comma Separated list of IDs of posts not listed above', 'display-widgets') ?>:</label>
    <input type="text" value="<?php echo $instance['other_ids'] ?>" name="<?php echo $widget->get_field_name('other_ids'); ?>" id="<?php echo $widget->get_field_id('other_ids'); ?>" />
    </p>
    </div>
<?php if(!$dw_loaded){ ?>
<script type="text/javascript">function dw_toggle($this){$this.next('.dw_collapse').toggle();}</script>
<?php
        $dw_loaded = true;
    }
}

function dw_update_widget_options($instance, $new_instance, $old_instance){
    dw_register_globals();
    
    global $dw_pages, $dw_cats, $dw_taxes, $dw_cposts, $dw_checked, $dw_langs;
    
    if($dw_pages){
        foreach ($dw_pages as $page){
            if(isset($new_instance['page-'. $page->ID]))
                $instance['page-'. $page->ID] = 1;
            else if(isset($instance['page-'. $page->ID]))
                unset($instance['page-'. $page->ID]);
            unset($page);
        }
    }
    
    foreach ($dw_cats as $cat){
        if(isset($new_instance['cat-'. $cat->cat_ID]))
            $instance['cat-'. $cat->cat_ID] = 1;
        else if(isset($instance['cat-'. $cat->cat_ID]))
            unset($instance['cat-'. $cat->cat_ID]);
        unset($cat);
    }
    
    if($dw_cposts){
        foreach ($dw_cposts as $post_key => $custom_post){
            if(isset($new_instance['type-'. $post_key]))
                $instance['type-'. $post_key] = 1;
            else if(isset($instance['type-'. $post_key]))
                unset($instance['type-'. $post_key]);

            if(isset($new_instance['type-'. $post_key.'-archive']))
                $instance['type-'. $post_key.'-archive'] = 1;
            else if(isset($instance['type-'. $post_key.'-archive']))
                unset($instance['type-'. $post_key.'-archive']);

            unset($custom_post);
        }
    }
    
    if($dw_taxes){
        foreach ($dw_taxes as $tax){
            if(isset($new_instance['tax-'. $tax]))
                $instance['tax-'. $tax] = 1;
            else if(isset($instance['tax-'. $tax]))
                unset($instance['tax-'. $tax]);
            unset($tax);
        }
    }
    
    if($dw_langs){
        foreach($dw_langs as $lang){
            if(isset($new_instance['lang-'. $lang['language_code'] ]))
                $instance['lang-'. $lang['language_code']] = 1;
            else if(isset($instance['lang-'. $lang['language_code']]))
                unset($instance['lang-'. $lang['language_code']]);
            unset($lang);
        }    
    }
         
    $instance['dw_include'] = $new_instance['dw_include'] ? 1 : 0;
    if(isset($new_instance['dw_logout']))
        $instance['dw_logout'] =  $new_instance['dw_logout'];
    if(isset($new_instance['dw_login']))
        $instance['dw_login'] = $new_instance['dw_login'];
    $instance['other_ids'] = $new_instance['other_ids'] ? $new_instance['other_ids'] : '';
    
    foreach(array('front', 'home', 'archive', 'single', '404', 'search') as $page){
        if(isset($new_instance['page-'. $page]))
            $instance['page-'. $page] = 1;
        else if(isset($instance['page-'. $page]))
            unset($instance['page-'. $page]);
    }

    return $instance;
}

function dw_register_globals(){
    global $dw_pages, $dw_cats, $dw_taxes, $dw_cposts, $dw_checked, $dw_langs;
    
    if(!$dw_checked){
        if(!$dw_pages)
            $dw_pages = get_posts( array(
                'post_type' => 'page', 'post_status' => 'publish', 
                'numberposts' => -1, 'orderby' => 'title', 'order' => 'ASC'
            ));
        
        if(!$dw_cats)
            $dw_cats = get_categories(array('hide_empty' => false));    
            
        if(!$dw_cposts and function_exists('get_post_types')){
            $dw_cposts = get_post_types(array(), 'object');
            foreach(array('revision','post','page','attachment','nav_menu_item') as $unset)
                unset($dw_cposts[$unset]);
                
            $dw_taxes = array();
            
            foreach($dw_cposts as $c => $type){
                $post_taxes = get_object_taxonomies($c);
                foreach($post_taxes as $post_tax)
                    $dw_taxes[] = $post_tax;
            }
        }
        
        if(!$dw_langs and function_exists('icl_get_languages'))
            $dw_langs = icl_get_languages('skip_missing=0&orderby=code');

        $dw_checked = true;
    }

}

/* WPML support */
function dw_get_lang_id($id, $type='page'){
    global $dw_wpml_support;
    
    if(!$dw_wpml_support)
        $dw_wpml_support = (function_exists('icl_object_id')) ? 'true' : 'false';
    
    if($dw_wpml_support == 'true')
        $id = icl_object_id($id, $type, true);
    
    return $id;
}

//TODO: Add text field that accepts full urls that will be checked under 'else'