File widgets/carousel/carousel.php

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<?php

namespace SIW\Widgets;

use SIW\HTML;
use SIW\Elements\Carousel as Element_Carousel;

/**
 * Widget met carousel
 *
 * @copyright 2019 SIW Internationale Vrijwilligersprojecten
 * @since     3.0.0
 * 
 * @widget_data
 * Widget Name: SIW: Carousel
 * Description: Toont carousel.
 * Author: SIW Internationale Vrijwilligersprojecten
 * Author URI: https://www.siw.nl
 */
class Carousel extends Widget {

    /**
     * {@inheritDoc}
     */
    protected $widget_id = 'carousel';

    /**
     * {@inheritDoc}
     */
    protected $widget_dashicon = 'format-gallery';

    /**
     * {@inheritDoc}
     */
    protected function set_widget_properties() {
        $this->widget_name = __( 'Carousel', 'siw' );
        $this->widget_description = __( 'Toont carousel', 'siw' );
    }

    /**
     * Instantie van Carousel
     *
     * @var Carousel
     */
    protected $carousel;


    /**
     * {@inheritDoc}
     */
    public function get_widget_form() {
        $widget_form = [
            'title' => [
                'type'  => 'text',
                'label' => __( 'Titel', 'siw' ),
            ],
            'intro' => [
                'type'           => 'tinymce',
                'label'          => __( 'Intro', 'siw' ),
                'rows'           => 4,
                'default_editor' => 'html',
            ],
            'items' => [
                'type'    => 'slider',
                'label'   => __( 'Aantal posts in carousel', 'siw' ),
                'default' => 6,
                'min'     => 2,
                'max'     => 10,
            ],
            'columns' => [
                'type'    => 'slider',
                'label'   => __( 'Aantal kolommen', 'siw' ),
                'default' => 4,
                'min'     => 1,
                'max'     => 4,
            ],
            'post_type' => [
                'type'          => 'select',
                'label'         => __( 'Type', 'siw' ),
                'prompt'        => __( 'Kies een type', 'siw' ),
                'options'       => $this->get_post_types(),
                'state_emitter' => [
                    'callback' => 'select',
                    'args'     => ['post_type'],
                ],
            ],
        ];
        foreach ( $this->get_taxonomies() as $post_type => $taxonomies ) {
            $taxonomy_options = [
                '' => __( 'Geen', 'siw' ),
            ];
            foreach ( $taxonomies as $taxonomy => $label ) {
                $taxonomy_options[ $taxonomy ] = $label;
            }

            $widget_form["{$post_type}_taxonomy"] = [
                'type'          => 'select',
                'label'         => __( 'Taxonomy', 'siw' ),
                'default'       => '',
                'options'       => $taxonomy_options,
                'state_handler' => [
                    "post_type[{$post_type}]" => ['show'],
                    '_else[post_type]'        => ['hide'],
                ],
                'state_emitter' => [
                    'callback' => 'select',
                    'args'     => ["{$post_type}_taxonomy"],
                ],
            ];
            foreach ( $taxonomies as $taxonomy => $label ) {
                $widget_form[ $taxonomy ] = [
                    'type'          => 'select',
                    'label'         => $label,
                    'default'       => '',
                    'options'       => $this->get_term_options( $taxonomy ),
                    'state_handler' => [
                        "{$post_type}_taxonomy[{$taxonomy}]" => ['show'],
                        "_else[{$post_type}_taxonomy]" => ['hide'],
                        "post_type[{$post_type}]" => ['show'],
                        '_else[post_type]'        => ['hide'],
                    ],
                ];
            }
        }
        $widget_form['show_featured_products'] = [
            'type'          => 'checkbox',
            'label'         => __( 'Toon alleen uitgelichte Groepsprojecten', 'siw' ),
            'default'       => false,
            'state_handler' => [
                "post_type[product]" => ['show'],
                '_else[post_type]'        => ['hide'],
            ],
        ];
        $widget_form['show_button'] = [
            'type'          => 'checkbox',
            'label'         => __( 'Toon een knop', 'siw' ),
            'default'       => false,
            'state_emitter' => [
                'callback'    => 'conditional',
                'args'        => [
                    'button[show]: val',
                    'button[hide]: ! val'
                ],
            ],
        ];
        $widget_form['button_text'] = [
            'type'          => 'text',
            'label'         => __( 'Knoptekst', 'siw' ),
            'state_handler' => [
                'button[show]' => [ 'show' ],
                'button[hide]' => [ 'hide' ],
            ],
        ];
    
        return $widget_form;
    }

    /**
     * {@inheritDoc}
     */
    public function get_content( array $instance, array $args, array $template_vars, string $css_name ) {

        $instance = $this->parse_instance( $instance );

        $carousel = new Element_Carousel();
        $carousel->set_post_type( $instance['post_type'] );
        $carousel->set_items( $instance['items'] );
        $carousel->set_columns( $instance['columns'] );
        if ( ! empty( $instance['taxonomy'] ) && ! empty( $instance['term'] ) ) {
            $carousel->set_taxonomy_term( $instance['taxonomy'], $instance['term'] );
        }
        elseif ( 'product' == $instance['post_type'] && isset( $instance['show_featured_products'] ) && $instance['show_featured_products']  ) {
            $carousel->set_taxonomy_term( 'product_visibility', 'featured' );
        }
        
        $content = '';

        if ( ! empty( $instance['intro'] ) ) {
            $content .= '<div class="carousel-intro">';
            $content .= wpautop( esc_html( $instance['intro'] ) );
            $content .= '</div>';
        }
        $content .= $carousel->render();
        if ( $instance['show_button'] ) {
            $content .= '<div class="carousel-button">';
            $content .= $this->generate_button( $instance['button_text'], $instance['post_type'], $instance['taxonomy'], $instance['term'] );
            $content .= '</div>';
        }

        return $content;
    }

    /**
     * Parse args voor instance
     *
     * @param array $instance
     * @return array
     */
    protected function parse_instance( $instance ) {
        $instance = wp_parse_args(
            $instance,
            [ 
                'post_type'   => '',
                'intro'       => '',
                'columns'     => 4,
                'items'       => 6,
                'show_button' => false,
                'button_text' => '',
            ]
        );
        $instance['taxonomy'] = $instance["{$instance['post_type']}_taxonomy"] ?? '';
        $instance['term'] = $instance[ $instance['taxonomy'] ] ?? '';

        return $instance;
    }

    /**
     * Genereert knop
     *
     * @param string $button_text
     * @param string $post_type
     * @param string $taxonomy
     * @param string $term
     * @return string
     */
    protected function generate_button( string $button_text, string $post_type, string $taxonomy, string $term ) {
        if ( ! empty( $taxonomy ) && ! empty( $term ) ) {
            $link = get_term_link( $term, $taxonomy );
        }
        else {
            $link = get_post_type_archive_link( $post_type );
        }
        $button = HTML::generate_link( $link, $button_text, [ 'class' => 'kad-btn kad-btn-primary' ] ); //TODO: functie generate button
        return $button;
    }

    /**
     * Haalt ondersteunde post types op
     * 
     * @return array
     */
    protected function get_post_types() {
        $post_types = [];
        $post_types = [
            'siw_tm_country' => __( 'Op Maat landen', 'siw' ),
            'product'        => __( 'Groepsprojecten', 'siw' ),
        ];
        /**
         * Custom post types
         *
         * @param array $post_types
         */
        $post_types = apply_filters( 'siw_post_types', $post_types );

        return $post_types;
    }

    /**
     * Haalt ondersteunde taxonomieën op
     * 
     * @return array
     */
    protected function get_taxonomies() {
        $taxonomies = [] ;
        $taxonomies['siw_tm_country'] = [
            'siw_tm_country_continent' => __( 'Continent', 'siw' ),
        ];
        $taxonomies['product'] = [
            'product_cat'        => __( 'Continent', 'siw' ),
        ];

        /**
         * Taxonomieën per post type
         *
         * @param array $taxonomies
         */
        $taxonomies = apply_filters( 'siw_post_type_taxonomies', $taxonomies );

        return $taxonomies;
    }

    /**
     * Haal optielijst van taxonomie op
     *
     * @param string $taxonomy
     * @return array
     */
    protected function get_term_options( string $taxonomy ) {
        $terms = get_terms( $taxonomy );
        $term_options[''] = __( 'Alle', 'siw' );
        foreach ( $terms as $term ) {
            $term_options[ $term->slug ] = $term->name;
        }
        return $term_options;
    }
}

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