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<?php
/**
 * Class CtfWidget
 *
 * Creates a text widget with the custom-twitter-feeds shortcode inside
 */

class CtfWidget extends WP_Widget
{
    function __construct() {
        parent::__construct(
            'custom-twitter-feeds-widget',
            __( 'Custom Twitter Feeds', 'custom-twitter-feeds' ),
            array( 'description' => __( 'Display your Twitter feed', 'custom-twitter-feeds' ), )
        );
    }

public function widget( $args, $instance ) {

$title = isset( $instance['title'] ) ? apply_filters( 'widget_title', $instance['title'], $instance, $this->id_base ) : '';
        $content = isset( $instance['content'] ) ? strip_tags( $instance['content'] ) : '[custom-twitter-feeds]';

echo $args['before_widget'];

if ( ! empty( $title ) ) {
            echo $args['before_title'] . esc_html( $title ) . $args['after_title'];
        }

echo do_shortcode( $content );

echo $args['after_widget'];
    }

public function form( $instance ) {

$title = isset( $instance['title'] ) ? $instance['title'] : '';
        $content = isset ( $instance['content'] ) ? strip_tags( $instance['content'] ) : '[custom-twitter-feeds]';
        ?>
        <p>
            <label for="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>"><?php _e( 'Title:' ); ?></label>
            <input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'title' ) ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>" />
        </p>
        <textarea class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'content' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'content' ) ); ?>" rows="16"><?php echo strip_tags( $content ); ?></textarea>
        <?php
    }

public function update( $new_instance, $old_instance ) {
        $instance = array();
        $instance['title'] = ( ! empty( $new_instance['title'] ) ) ? strip_tags( $new_instance['title'] ) : '';
        $instance['content'] = ( ! empty( $new_instance['content'] ) ) ? strip_tags( $new_instance['content'] ) : '';

return $instance;
    }
}

// register and load the widget
function ctf_load_widget() {
    register_widget( 'CtfWidget' );
}
add_action( 'widgets_init', 'ctf_load_widget' );

// allow shortcode in widgets
add_filter( 'widget_text', 'do_shortcode' );