soderlind/read-offline

<?php

class Read_Offline_Widget extends WP_Widget {

    var $localizationDomain = "read-offline";

    private static $instance;

    public static function get_instance() {

        if ( self::$instance ) {
            return self::$instance;
        }

        self::$instance = new self();
        return self::$instance;
    }

    function __construct() {
        parent::__construct(
            'read_offline_widget', // Base ID
            'Read Offline', // Name
            array( 'description' => __( 'Adds a download link for the current post and page. Configurable in Settings->Read Offline', $this->localizationDomain ), ) // Args
        );
    }
    function widget($args, $instance) {
        global $post;

        if (!is_single() && !is_page()) return;

        extract($args, EXTR_SKIP);
        echo $before_widget;


        $title = empty($instance['title']) ? ' ' : apply_filters('widget_title', $instance['title']);
        $text = empty($instance['text']) ? ' ' : apply_filters('widget_text', $instance['text']);

        $icononly = ($instance['icononly'] == 'yes');

        $text = str_ireplace('%title%', $post->post_title,$text);
        if ( !empty( $title ) ) {
            echo $before_title . $title . $after_title;
        }
        echo '<div class="readoffline-widget">';
            $options = get_option('ps_read_offline_options');
            $formats = array_uintersect(
                array(
                    'pdf' => 'PDF'
                    ,'epub' => 'ePub'
                    ,'mobi' => 'mobi'
                )
                , $options['ps_read_offline_option_format']
                , "strcasecmp"
            );
            echo  $text, '<br/>';

            if ($icononly === true) {
                foreach ($formats as $type => $document_type) {
                    printf ('<div><a class="%s" href="%s" title="%s %s.%s"></a></div>',
                        $type,$this->ps_read_offline_url($post->ID,$post->post_name,$type),
                        __('Download ',$this->localizationDomain),$post->post_name,$type
                    );
                }
            } else {
                echo "<ul>";
                foreach ($formats as $type => $document_type) {
                    printf ('<li><a class="%s" href="%s" title="%s %s.%s">%s%s</a></li>',
                        $type,$this->ps_read_offline_url($post->ID,$post->post_name,$type),
                        __('Download ',$this->localizationDomain),$post->post_name,$type,
                        __('Download ',$this->localizationDomain),$document_type
                    );
                }
                echo "</ul>";
            }
        echo '</div>';

        echo $after_widget;
    }


    function ps_read_offline_url($id,$name,$format) {
        $rules = $GLOBALS['wp_rewrite']->wp_rewrite_rules();
        if ( isset($rules)) {
            return sprintf("%s/read-offline/%s/%s.%s",home_url(),$id,$name,$format);
        } else {
            return sprintf("%s/index.php?read_offline_id=%s&read_offline_name=%s&&read_offline_format=%s",home_url(),$id,$name,$format);
        }
    }

    function ps_read_offline_ga_tacking($dotracking,$type,$name) {
        if (in_array('yes',$dotracking)) {
            return sprintf("onclick=\"if (typeof _gaq !== 'undefined' && _gaq !== null) {_gaq.push(['_trackEvent', 'read-offline','%s','%s']);}return true;\"",$type,$name);
        } else {
            return "";
        }
    }


    function update($new_instance, $old_instance) {
        $instance = $old_instance;
        $instance['title'] = strip_tags($new_instance['title']);
        $instance['text'] = strip_tags($new_instance['text']);
        $instance['icononly'] = $new_instance['icononly'];

        return $instance;
    }

    function form($instance) {
        $instance = wp_parse_args( (array) $instance, array( 'title' => '', 'text' => '', 'icononly' => 'no'  ));
        $title = strip_tags($instance['title']);
        $text = strip_tags($instance['text']);
        $icononly = $instance['icononly'];
        printf('<p><label for="%s">%s <input class="widefat" id="%s" name="%s" type="text" value="%s" /></label></p>',$this->get_field_id('title'),__('Title:',$this->localizationDomain),$this->get_field_id('title'),$this->get_field_name('title'),esc_attr($title));
        printf('<p><label for="%s">%s <textarea class="widefat" id="%s" name="%s" >%s</textarea></label></p>',$this->get_field_id('text'),__('Text:',$this->localizationDomain),$this->get_field_id('text'),$this->get_field_name('text'),esc_attr($text));
        printf('
            <p>Icons only?:
                <input class="radio" type="radio" %s id="%s_yes" name="%s" value="yes"/> <label for="%s_yes">%s</label>
                <input class="radio" type="radio" %s id="%s_no" name="%s" value="no"/> <label for="%s_no">%s</label>
            </p>',
                checked( $instance['icononly'], 'yes', false),$this->get_field_id( 'icononly' ),$this->get_field_name( 'icononly' ),$this->get_field_id( 'icononly' ),__('Yes'),
                checked( $instance['icononly'], 'no', false), $this->get_field_id( 'icononly' ),$this->get_field_name( 'icononly' ),$this->get_field_id( 'icononly' ),__('No')
        );
    }
} // end class