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1<?php //phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
2/**
3 * Slideshow shortcode.
4 * Adds a new "slideshow" gallery type when adding a gallery using the classic editor.
5 *
6 * @package automattic/jetpack
7 */
8
9use Automattic\Jetpack\Assets;
10use Automattic\Jetpack\Extensions\Slideshow;
11
12if ( ! defined( 'ABSPATH' ) ) {
13    exit( 0 );
14}
15
16/**
17 * Slideshow shortcode usage: [gallery type="slideshow"] or the older [slideshow]
18 *
19 * @phan-constructor-used-for-side-effects
20 */
21class Jetpack_Slideshow_Shortcode {
22    /**
23     * Number of slideshows on a page.
24     *
25     * @var int
26     */
27    public $instance_count = 0;
28
29    /**
30     * Constructor
31     */
32    public function __construct() {
33        global $shortcode_tags;
34
35        // Only if the slideshow shortcode has not already been defined.
36        if ( ! array_key_exists( 'slideshow', $shortcode_tags ) ) {
37            add_shortcode( 'slideshow', array( $this, 'shortcode_callback' ) );
38        }
39
40        // Only if the gallery shortcode has not been redefined.
41        if ( isset( $shortcode_tags['gallery'] ) && 'gallery_shortcode' === $shortcode_tags['gallery'] ) {
42            add_filter( 'post_gallery', array( $this, 'post_gallery' ), 1002, 2 );
43            add_filter( 'jetpack_gallery_types', array( $this, 'add_gallery_type' ), 10 );
44        }
45    }
46
47    /**
48     * Responds to the [gallery] shortcode, but not an actual shortcode callback.
49     *
50     * @param string $value An empty string if nothing has modified the gallery output, the output html otherwise.
51     * @param array  $attr  The shortcode attributes array.
52     *
53     * @return string The (un)modified $value
54     */
55    public function post_gallery( $value, $attr ) {
56        // Bail if somebody else has done something.
57        if ( ! empty( $value ) ) {
58            return $value;
59        }
60
61        // If [gallery type="slideshow"] have it behave just like [slideshow].
62        if ( ! empty( $attr['type'] ) && 'slideshow' === $attr['type'] ) {
63            return $this->shortcode_callback( $attr );
64        }
65
66        return $value;
67    }
68
69    /**
70     * Add the Slideshow type to gallery settings
71     *
72     * @see Jetpack_Tiled_Gallery::media_ui_print_templates
73     *
74     * @param array $types An array of types where the key is the value, and the value is the caption.
75     *
76     * @return array
77     */
78    public function add_gallery_type( $types = array() ) {
79        $types['slideshow'] = esc_html__( 'Slideshow', 'jetpack' );
80
81        return $types;
82    }
83
84    /**
85     * Display shortcode.
86     *
87     * @param array $attr Shortcode attributes.
88     */
89    public function shortcode_callback( $attr ) {
90        $post_id = get_the_ID();
91
92        $attr = shortcode_atts(
93            array(
94                'trans'     => 'fade',
95                'order'     => 'ASC',
96                'orderby'   => 'menu_order ID',
97                'id'        => $post_id,
98                'include'   => '',
99                'exclude'   => '',
100                'autostart' => true,
101                'size'      => '',
102            ),
103            $attr,
104            'slideshow'
105        );
106
107        if ( 'rand' === strtolower( $attr['order'] ) ) {
108            $attr['orderby'] = 'none';
109        }
110
111        $attr['orderby'] = sanitize_sql_orderby( $attr['orderby'] );
112        if ( ! $attr['orderby'] ) {
113            $attr['orderby'] = 'menu_order ID';
114        }
115
116        if ( ! $attr['size'] ) {
117            $attr['size'] = 'full';
118        }
119
120        // Don't restrict to the current post if include.
121        $post_parent = ( empty( $attr['include'] ) ) ? (int) $attr['id'] : null;
122
123        $attachments = get_posts(
124            array(
125                'post_status'      => 'inherit',
126                'post_type'        => 'attachment',
127                'post_mime_type'   => 'image',
128                'posts_per_page'   => - 1,
129                'post_parent'      => $post_parent,
130                'order'            => $attr['order'],
131                'orderby'          => $attr['orderby'],
132                'include'          => $attr['include'],
133                'exclude'          => $attr['exclude'],
134                'suppress_filters' => false,
135            )
136        );
137
138        if ( ! is_countable( $attachments ) || count( $attachments ) < 1 ) {
139            return false;
140        }
141
142        $gallery_instance = sprintf( 'gallery-%d-%d', $attr['id'], ++$this->instance_count );
143
144        $gallery = array();
145        foreach ( $attachments as $attachment ) {
146            $attachment_image_src   = wp_get_attachment_image_src( $attachment->ID, $attr['size'] );
147            $attachment_image_src   = false !== $attachment_image_src ? $attachment_image_src[0] : ''; // [url, width, height].
148            $attachment_image_title = get_the_title( $attachment->ID );
149            $attachment_image_alt   = get_post_meta( $attachment->ID, '_wp_attachment_image_alt', true );
150            /**
151             * Filters the Slideshow slide caption.
152             *
153             * @module shortcodes
154             *
155             * @since 2.3.0
156             *
157             * @param string wptexturize( strip_tags( $attachment->post_excerpt ) ) Post excerpt.
158             * @param string $attachment ->ID Attachment ID.
159             */
160            $caption = apply_filters( 'jetpack_slideshow_slide_caption', wptexturize( wp_strip_all_tags( $attachment->post_excerpt ) ), $attachment->ID );
161
162            $gallery[] = (object) array(
163                'src'      => (string) esc_url_raw( $attachment_image_src ),
164                'id'       => (string) $attachment->ID,
165                'title'    => (string) esc_attr( $attachment_image_title ),
166                'alt'      => (string) esc_attr( $attachment_image_alt ),
167                'caption'  => (string) $caption,
168                'itemprop' => 'image',
169            );
170        }
171
172        $color     = Jetpack_Options::get_option( 'slideshow_background_color', 'black' );
173        $autostart = $attr['autostart'] ? $attr['autostart'] : 'true';
174        $js_attr   = array(
175            'gallery'   => $gallery,
176            'selector'  => $gallery_instance,
177            'trans'     => $attr['trans'] ? $attr['trans'] : 'fade',
178            'autostart' => $autostart,
179            'color'     => $color,
180        );
181
182        // Show a link to the gallery in feeds.
183        if ( is_feed() ) {
184            return sprintf(
185                '<a href="%s">%s</a>',
186                esc_url( get_permalink( $post_id ) . '#' . $gallery_instance . '-slideshow' ),
187                esc_html__( 'Click to view slideshow.', 'jetpack' )
188            );
189        }
190
191        if (
192            class_exists( 'Jetpack_AMP_Support' )
193            && Jetpack_AMP_Support::is_amp_request()
194        ) {
195            // Load the styles and use the rendering method from the Slideshow block.
196            Jetpack_Gutenberg::load_styles_as_required( 'slideshow' );
197
198            $amp_args = array(
199                'ids' => wp_list_pluck( $gallery, 'id' ),
200            );
201
202            if ( 'true' == $autostart ) { // phpcs:ignore Universal.Operators.StrictComparisons.LooseEqual -- attribute can be stored as boolean or string.
203                $amp_args['autoplay'] = true;
204            }
205
206            /*
207             * Blocks can be disabled in Jetpack Settings.
208             * If that's the case, we need to include the slideshow block manually.
209             */
210            if ( ! class_exists( 'Automattic\Jetpack\Extensions\Slideshow' ) ) {
211                require_once JETPACK__PLUGIN_DIR . 'extensions/blocks/slideshow/slideshow.php';
212            }
213
214            return Slideshow\render_amp( $amp_args );
215        }
216
217        return $this->slideshow_js( $js_attr );
218    }
219
220    /**
221     * Render the slideshow js
222     *
223     * Returns the necessary markup and js to fire a slideshow.
224     *
225     * @param array $attr Attributes for the slideshow.
226     *
227     * @uses $this->enqueue_scripts()
228     *
229     * @return string HTML output.
230     */
231    public function slideshow_js( $attr ) {
232        // Enqueue scripts.
233        $this->enqueue_scripts();
234
235        $output = '<p class="jetpack-slideshow-noscript robots-nocontent">' . esc_html__( 'This slideshow requires JavaScript.', 'jetpack' ) . '</p>';
236
237        /*
238         * Checking for JSON_HEX_AMP and friends here allows us to get rid of
239         * '&quot;', that can sometimes be included in the JSON input in some languages like French.
240         */
241        $gallery_attributes = _wp_specialchars(
242            wp_check_invalid_utf8(
243                wp_json_encode( $attr['gallery'], JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_APOS | JSON_HEX_QUOT )
244            ),
245            ENT_QUOTES,
246            false,
247            true
248        );
249
250        $output .= sprintf(
251            '<div id="%s" class="jetpack-slideshow-window jetpack-slideshow jetpack-slideshow-%s" data-trans="%s" data-autostart="%s" data-gallery="%s" itemscope itemtype="https://schema.org/ImageGallery"></div>',
252            esc_attr( $attr['selector'] . '-slideshow' ),
253            esc_attr( $attr['color'] ),
254            esc_attr( $attr['trans'] ),
255            esc_attr( $attr['autostart'] ),
256            $gallery_attributes
257        );
258
259        return $output;
260    }
261
262    /**
263     * Actually enqueues the scripts and styles.
264     */
265    public function enqueue_scripts() {
266
267        wp_register_script(
268            'jetpack-shortcode-deps',
269            plugins_url( '_inc/build/shortcodes/js/dependencies.min.js', JETPACK__PLUGIN_FILE ),
270            array( 'jquery' ),
271            '20250905',
272            true
273        );
274
275        wp_enqueue_script(
276            'jetpack-slideshow',
277            Assets::get_file_url_for_environment( '_inc/build/shortcodes/js/slideshow-shortcode.min.js', 'modules/shortcodes/js/slideshow-shortcode.js' ),
278            array( 'jquery', 'jetpack-shortcode-deps' ),
279            '20160119.1',
280            true
281        );
282        wp_enqueue_style(
283            'jetpack-slideshow',
284            plugins_url( '/css/slideshow-shortcode.css', __FILE__ ),
285            array(),
286            JETPACK__VERSION
287        );
288        wp_style_add_data( 'jetpack-slideshow', 'rtl', 'replace' );
289
290        wp_localize_script(
291            'jetpack-slideshow',
292            'jetpackSlideshowSettings',
293            /**
294             * Filters the slideshow JavaScript spinner.
295             *
296             * @module shortcodes
297             *
298             * @since 2.1.0
299             * @since 4.7.0 Added the `speed` option to the array of options.
300             *
301             * @param array $args
302             * - string - spinner        - URL of the spinner image.
303             * - string - speed          - Speed of the slideshow. Defaults to 4000.
304             * - string - label_prev     - Aria label for slideshow's previous button
305             * - string - label_stop    - Aria label for slideshow's pause button
306             * - string - label_next     - Aria label for slideshow's next button
307             */
308            apply_filters(
309                'jetpack_js_slideshow_settings',
310                array(
311                    'spinner'    => plugins_url( '/img/slideshow-loader.gif', __FILE__ ),
312                    'speed'      => '4000',
313                    'label_prev' => __( 'Previous Slide', 'jetpack' ),
314                    'label_stop' => __( 'Pause Slideshow', 'jetpack' ),
315                    'label_next' => __( 'Next Slide', 'jetpack' ),
316                )
317            )
318        );
319    }
320
321    /**
322     * Instantiate shortcode.
323     */
324    public static function init() {
325        new Jetpack_Slideshow_Shortcode();
326    }
327}
328
329Jetpack_Slideshow_Shortcode::init();