<?php
/**
 * @widget_name: Carousel Widget
 * @description: This class handles posts as carousel
 * @package: dineshghimire
 * @subpackage: BlogMagazine
 * @author: Dinesh Ghimire
 * @author_uri: https://dinesh-ghimire.com.np
 * @since 1.0.0
 */
class BlogMagazine_Carousel_widget extends Dglib_Master_Widget{

	/**
     * Register widget with WordPress.
     */
    public function __construct() {

        $widget_ops = array(
            'classname' => 'blogmagazine_carousel',
            'description' => esc_html__( 'Displays posts from selected categories in carousel layouts.', 'blogmagazine' )
        );

        parent::__construct( 'blogmagazine_carousel', esc_html__( 'DG: Carousel', 'blogmagazine' ), $widget_ops );

    }

    /**
     * Helper function that holds widget fields
     * Array is used in update and form functions
     */
    public function widget_fields( $instance = array() ) {

        $blogmagazine_categories_lists = blogmagazine_categories_lists();
        
        $fields = array(
            'dg_widget_tab'       => array(
                'dg_widget_field_name'     => 'dg_widget_tab',
                'dg_widget_field_title'    => esc_html__( 'General', 'blogmagazine' ),
                'dg_widget_field_default'  => 'general',
                'dg_widget_field_type'     => 'tabgroup',
                'dg_widget_field_options'  => array(
                    'general'=>array(
                        'dg_widget_field_title'=>esc_html__('General', 'blogmagazine'),
                        'dg_widget_field_options'=> array(
                            'title' => array(
                                'dg_widget_field_name'         => 'title',
                                'dg_widget_field_title'        => esc_html__( 'Block title', 'blogmagazine' ),
                                'dg_widget_field_description'  => esc_html__( 'Enter your block title. (Optional - Leave blank to hide the title.)', 'blogmagazine' ),
                                'dg_widget_field_type'   => 'text'
                            ),
                            'title_target'    => array(
                                'dg_widget_field_name'     => 'title_target',
                                'dg_widget_field_wraper'   => 'title-target',
                                'dg_widget_field_title'    => esc_html__( 'Link Target', 'blogmagazine' ),
                                'dg_widget_field_default'  => '_self',
                                'dg_widget_field_type'     => 'select',
                                'dg_widget_field_options'  => dglib_link_target(),
                                'dg_widget_field_relation' => array(
                                    'exist' => array(
                                        'show_fields'   => array(
                                            'title-link', 
                                        ),
                                    ),
                                    'empty' => array(
                                        'hide_fields'   => array(
                                            'title-link', 
                                        ),
                                    ),
                                ),
                            ),
                            'title_link'    => array(
                                'dg_widget_field_name'     => 'title_link',
                                'dg_widget_field_wraper'   => 'title-link',
                                'dg_widget_field_title'    => esc_html__( 'Title link', 'blogmagazine' ),
                                'dg_widget_field_default'  => '',
                                'dg_widget_field_type'     => 'text',
                            ),
                            'terms_ids' => array(
                                'dg_widget_field_name'         => 'terms_ids',
                                'dg_widget_field_title'        => esc_html__( 'Block Categories', 'blogmagazine' ),
                                'dg_widget_field_type'   => 'multiselect',
                                'dg_widget_field_options' => $blogmagazine_categories_lists
                            ),
                            'thumbnail_size' => array(
                                'dg_widget_field_name'         => 'thumbnail_size',
                                'dg_widget_field_title'        => esc_html__( 
                                    'Image Size', 'blogmagazine' ),
                                'dg_widget_field_default'=> 'blogmagazine-thumb-800x600',
                                'dg_widget_field_type' => 'select',
                                'dg_widget_field_options'   => dglib_get_image_sizes(),
                            ),
                        )
                    ),
                    'layout' => array(
                        'dg_widget_field_title'=>esc_html__('Layout', 'blogmagazine'),
                        'dg_widget_field_options'=> array(
                            'block_layout' => array(
                                'dg_widget_field_name'         => 'block_layout',
                                'dg_widget_field_title'        => esc_html__( 'Carousel Layouts', 'blogmagazine' ),
                                'dg_widget_field_default'      => 'layout1',
                                'dg_widget_field_type'   => 'select',
                                'dg_widget_field_options' => array(
                                    'layout1' => esc_url( get_template_directory_uri() . '/assets/images/full-width1.png' )
                                )
                            ),
                        )
                    ),
                )
            )
        );
        
        $widget_fields_key = 'fields_'.$this->id_base;
        $widgets_fields = apply_filters( $widget_fields_key, $fields );
        return $widgets_fields;

    }

    /**
     * Front-end display of widget.
     *
     * @see WP_Widget::widget()
     *
     * @param array $args     Widget arguments.
     * @param array $instance Saved values from database.
     */
    public function widget( $args, $instance ) {

        if( empty( $instance ) ) {
            return;
        }

        extract($args);

        $title = isset( $instance['title'] ) ? esc_html($instance['title']) : '';
        $title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
        $title_link = isset( $instance['title_link'] ) ? esc_url($instance['title_link']) : '';
        $title_target = isset( $instance['title_target'] ) ? esc_attr($instance['title_target']) : '';
        $terms_ids  = isset( $instance['terms_ids'] ) ? $instance['terms_ids'] : '';
        $block_layout   = isset( $instance['block_layout'] ) ? esc_attr($instance['block_layout']) : 'layout1';
        $thumbnail_size   = isset( $instance['thumbnail_size'] ) ? esc_attr($instance['thumbnail_size']) : 'blogmagazine-thumb-800x600';
        $blogmagazine_post_count = apply_filters( 'blogmagazine_carousel_default_posts_count', 10 );
        $blogmagazineargs = array(
            'thumbnail_size' => $thumbnail_size,
            'query_args' => array(
                'cat' => $terms_ids,
                'posts_per_page' => absint( $blogmagazine_post_count )
            ),
        );
        echo $before_widget;
        ?>
        <div class="blogmagazine-block-wrapper carousel-posts dg-clearfix <?php echo esc_attr( $block_layout ); ?>">
            <div class="blogmagazine-block-title-nav-wrap">
                <?php 
                $title_args = array(
                    'title' => $title,
                    'title_target'=> $title_target,
                    'title_link' => $title_link,
                    'before_title'=>$before_title,
                    'after_title'=>$after_title,
                    'slider_nav' => true,
                );
                do_action('blogmagazine_widget_title', $title_args);
                ?>                  
            </div> <!-- blogmagazine-full-width-title-nav-wrap -->
            <div class="blogmagazine-block-posts-wrapper">
                <?php
                switch ( $block_layout ) {
                    default:
                    blogmagazine_carousel_default_layout_section( $blogmagazineargs );
                    break;
                }
                ?>
            </div><!-- .blogmagazine-block-posts-wrapper -->
        </div><!--- .blogmagazine-block-wrapper -->
        <?php
        echo $after_widget;
    
    }

}