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PHTML

<?php
/**
* Stories Renderer Base class.
*
* @link https://github.com/googleforcreators/web-stories-wp
*
* @copyright 2020 Google LLC
* @license https://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
*/
/**
* Copyright 2020 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
declare(strict_types = 1);
namespace Google\Web_Stories\Renderer\Stories;
use Google\Web_Stories\AMP_Story_Player_Assets;
use Google\Web_Stories\Assets;
use Google\Web_Stories\Context;
use Google\Web_Stories\Interfaces\Renderer as RenderingInterface;
use Google\Web_Stories\Model\Story;
use Google\Web_Stories\Services;
use Google\Web_Stories\Story_Post_Type;
use Google\Web_Stories\Story_Query;
use Iterator;
use WP_Post;
/**
* Renderer class.
*
* @SuppressWarnings(PHPMD.ExcessiveClassComplexity)
* @SuppressWarnings(PHPMD.TooManyPublicMethods)
*
* @phpstan-import-type StoryAttributes from \Google\Web_Stories\Story_Query
*
* @implements Iterator<int, Story>
*/
abstract class Renderer implements RenderingInterface, Iterator {
/**
* Web Stories stylesheet handle.
*/
public const STYLE_HANDLE = 'web-stories-list-styles';
/**
* Web Stories stylesheet handle.
*/
public const LIGHTBOX_SCRIPT_HANDLE = 'web-stories-lightbox';
/**
* Number of instances invoked. Kept it static to keep track.
*/
protected static int $instances = 0;
/**
* Assets instance.
*
* @var Assets Assets instance.
*/
protected Assets $assets;
/**
* Context instance.
*
* @var Context Context instance.
*/
protected Context $context;
/**
* Object ID for the Renderer class.
* To enable support for multiple carousels and lightboxes
* on the same page, we needed to identify each Renderer instance.
*
* This variable is used to add appropriate class to the Web Stories
* wrapper.
*/
protected int $instance_id = 0;
/**
* Story_Query instance.
*
* @var Story_Query Story_Query instance.
*/
protected Story_Query $query;
/**
* Story attributes
*
* @var array<string, string|int|bool> An array of story attributes.
* @phpstan-var StoryAttributes
*/
protected array $attributes = [];
/**
* Story posts.
*
* @var Story[] An array of story posts.
*/
protected array $stories = [];
/**
* Holds required html for the lightbox.
*
* @var string A string of lightbox markup.
*/
protected string $lightbox_html = '';
/**
* Pointer to iterate over stories.
*/
private int $position = 0;
/**
* Height for displaying story.
*/
protected int $height = 308;
/**
* Width for displaying story.
*/
protected int $width = 185;
/**
* Whether content overlay is enabled for story.
*/
protected bool $content_overlay;
/**
* Constructor
*
* @since 1.5.0
*
* @param Story_Query $query Story_Query instance.
*/
public function __construct( Story_Query $query ) {
$this->query = $query;
$this->attributes = $this->query->get_story_attributes();
$this->content_overlay = $this->attributes['show_title'] || $this->attributes['show_date'] || $this->attributes['show_author'] || $this->attributes['show_excerpt'];
// TODO, find a way to inject this a cleaner way.
$injector = Services::get_injector();
/**
* Assets instance.
*
* @var Assets $assets Assets instance.
*/
$assets = $injector->make( Assets::class );
/**
* Context instance.
*
* @var Context $context Context instance.
*/
$context = $injector->make( Context::class );
$this->assets = $assets;
$this->context = $context;
}
/**
* Output markup for amp stories.
*
* @since 1.5.0
*
* @param array<string,mixed> $args Array of rendering arguments.
* @return string
*/
public function render( array $args = [] ): string {
++self::$instances;
$this->instance_id = self::$instances;
foreach ( $args as $key => $val ) {
if ( property_exists( $this, $key ) ) {
$this->{$key} = $val;
}
}
return '';
}
/**
* Retrieve current story.
*
* @since 1.5.0
*
* @return Story|null
*/
public function current(): ?Story {
return $this->stories[ $this->position ] ?? null;
}
/**
* Retrieve next story.
*
* @since 1.5.0
*
* @return void
*/
public function next(): void {
++$this->position;
}
/**
* Retrieve the key for current node in list.
*
* @since 1.5.0
*
* @return bool|float|int|string|void|null
*/
#[\ReturnTypeWillChange]
public function key() {
return $this->position;
}
/**
* Check if current position is valid.
*
* @since 1.5.0
*
* @return bool
*/
public function valid(): bool {
return isset( $this->stories[ $this->position ] );
}
/**
* Reset pointer to start of the list.
*
* @since 1.5.0
*
* @return void
*/
public function rewind(): void {
$this->position = 0;
}
/**
* Perform initial setup for object.
*
* @since 1.5.0
*
* @return void
*/
public function init(): void {
$this->stories = array_filter( array_map( [ $this, 'prepare_stories' ], $this->query->get_stories() ) );
add_action( 'wp_footer', [ $this, 'render_stories_lightbox' ] );
add_action( 'amp_post_template_footer', [ $this, 'render_stories_lightbox' ] );
}
/**
* Initializes renderer functionality.
*
* @since 1.5.0
*
* @return void
*/
public function load_assets(): void {
if ( wp_style_is( self::STYLE_HANDLE, 'registered' ) ) {
return;
}
// Web Stories styles for AMP and non-AMP pages.
$this->assets->register_style_asset( self::STYLE_HANDLE );
// Web Stories lightbox script.
$this->assets->register_script_asset( self::LIGHTBOX_SCRIPT_HANDLE, [ AMP_Story_Player_Assets::SCRIPT_HANDLE ] );
if ( \defined( 'AMPFORWP_VERSION' ) ) {
add_action( 'amp_post_template_css', [ $this, 'add_amp_post_template_css' ] );
}
}
/**
* Prints required inline CSS when using the AMP for WP plugin.
*
* @since 1.13.0
*
* @return void
*/
public function add_amp_post_template_css(): void {
$path = $this->assets->get_base_path( sprintf( 'assets/css/%s%s.css', self::STYLE_HANDLE, is_rtl() ? '-rtl' : '' ) );
if ( is_readable( $path ) ) {
$css = file_get_contents( $path ); // phpcs:ignore WordPressVIPMinimum.Performance.FetchingRemoteData.FileGetContentsUnknown
echo $css; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
}
}
/**
* Returns story item data.
*
* @SuppressWarnings(PHPMD.NPathComplexity)
*
* @since 1.5.0
*
* @param object $post Array of post objects.
* @return Story|null Story object or null if given post
*/
public function prepare_stories( $post ): ?Story {
if ( ! $post instanceof WP_Post ) {
return null;
}
$story_data = [];
// TODO: get from field state instead.
if ( ! $this->is_view_type( 'circles' ) ) {
if ( isset( $this->attributes['show_author'] ) && true === $this->attributes['show_author'] ) {
$author_id = absint( get_post_field( 'post_author', $post->ID ) );
$story_data['author'] = get_the_author_meta( 'display_name', $author_id );
}
if ( isset( $this->attributes['show_date'] ) && true === $this->attributes['show_date'] ) {
/* translators: Date format, see https://www.php.net/manual/en/datetime.format.php */
$story_data['date'] = get_the_date( __( 'M j, Y', 'web-stories' ), $post->ID );
}
}
$story_data['classes'] = $this->get_single_story_classes();
$story = new Story( $story_data );
$story->load_from_post( $post );
return $story;
}
/**
* Render story markup.
*
* @since 1.5.0
*
* @return void
*/
public function render_single_story_content(): void {
/**
* Story object.
*
* @var Story $story
*/
$story = $this->current();
$single_story_classes = $this->get_single_story_classes();
$lightbox_state = 'lightbox' . $story->get_id() . $this->instance_id;
// No need to load these styles on admin as editor styles are being loaded by the block.
if ( ! is_admin() || ( \defined( 'IFRAME_REQUEST' ) && IFRAME_REQUEST ) ) {
// Web Stories Styles for AMP and non-AMP pages.
$this->assets->enqueue_style_asset( self::STYLE_HANDLE );
}
if ( $this->context->is_amp() ) {
?>
<div
class="<?php echo esc_attr( $single_story_classes ); ?>"
on="<?php echo esc_attr( sprintf( 'tap:AMP.setState({%1$s: ! %1$s})', $lightbox_state ) ); ?>"
tabindex="0"
role="button"
>
<?php $this->render_story_with_poster(); ?>
</div>
<?php
} else {
$this->assets->enqueue_style( AMP_Story_Player_Assets::SCRIPT_HANDLE );
$this->assets->enqueue_script( AMP_Story_Player_Assets::SCRIPT_HANDLE );
$this->assets->enqueue_script_asset( self::LIGHTBOX_SCRIPT_HANDLE );
?>
<div class="<?php echo esc_attr( $single_story_classes ); ?>">
<?php $this->render_story_with_poster(); ?>
</div>
<?php
}
}
/**
* Renders the lightbox markup for non-amp pages.
*
* @since 1.5.0
*
* @return void
*/
public function render_stories_with_lightbox(): void {
$data = [
'controls' => [
[
'name' => 'close',
'position' => 'start',
],
[
'name' => 'skip-next',
],
],
'behavior' => [
'autoplay' => false,
],
];
?>
<div class="web-stories-list__lightbox">
<amp-story-player width="3.6" height="6" layout="responsive">
<script type="application/json">
<?php echo wp_json_encode( $data ); ?>
</script>
<?php echo wp_kses_post( $this->lightbox_html ); ?>
</amp-story-player>
</div>
<?php
}
/**
* Renders the lightbox markup for non-amp pages.
*
* @since 1.5.0
*
* @return void
*/
public function render_stories_with_lightbox_amp(): void {
// Have to ignore this as the escaping functions are stripping off 'amp-bind' custom attribute '[class]'.
echo $this->lightbox_html; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- Generated with properly escaped data.
}
/**
* Renders stories lightbox on 'wp_footer'.
*
* @return void
*/
public function render_stories_lightbox(): void {
// Return if we don't have anything to render.
if ( empty( $this->lightbox_html ) ) {
return;
}
?>
<div class="web-stories-list__lightbox-wrapper <?php echo esc_attr( 'ws-lightbox-' . $this->instance_id ); ?>">
<?php
if ( $this->context->is_amp() ) {
$this->render_stories_with_lightbox_amp();
} else {
$this->render_stories_with_lightbox();
}
?>
</div>
<?php
}
/**
* Verifies the current view type.
*
* @since 1.5.0
*
* @param string $view_type View type to check.
* @return bool Whether or not current view type matches the one passed.
*/
protected function is_view_type( $view_type ): bool {
return ( ! empty( $this->attributes['view_type'] ) && $view_type === $this->attributes['view_type'] );
}
/**
* Get view type for stories.
*
* @since 1.5.0
*
* @return string
*/
protected function get_view_type(): string {
return ! empty( $this->attributes['view_type'] ) ? $this->attributes['view_type'] : 'circles';
}
/**
* Renders stories archive link if the 'show_archive_link' attribute is set to true.
*
* @since 1.5.0
*
* @return void
*/
protected function maybe_render_archive_link(): void {
if (
empty( $this->attributes['show_archive_link'] ) ||
true !== $this->attributes['show_archive_link'] ||
empty( $this->attributes['archive_link_label'] )
) {
return;
}
$web_stories_archive = get_post_type_archive_link( Story_Post_Type::POST_TYPE_SLUG );
if ( empty( $web_stories_archive ) ) {
return;
}
?>
<div class="web-stories-list__archive-link">
<a href="<?php echo esc_url( $web_stories_archive ); ?>">
<?php echo esc_html( $this->attributes['archive_link_label'] ); ?>
</a>
</div>
<?php
}
/**
* Gets the classes for renderer container.
*
* @since 1.5.0
*
* @return string
*/
protected function get_view_classes(): string {
$view_classes = [];
$view_classes[] = ! empty( $this->attributes['view_type'] ) ? sprintf( 'is-view-type-%1$s', $this->attributes['view_type'] ) : 'is-view-type-circles';
if ( $this->is_view_type( 'grid' ) && ! empty( $this->attributes['number_of_columns'] ) ) {
$view_classes[] = sprintf( 'columns-%1$d', $this->attributes['number_of_columns'] );
}
if ( ! $this->is_view_type( 'circles' ) && ! empty( $this->attributes['sharp_corners'] ) ) {
$view_classes[] = 'is-style-squared';
} else {
$view_classes[] = 'is-style-default';
}
if ( $this->is_view_type( 'circles' ) && ! empty( $this->attributes['show_title'] ) ) {
$view_classes[] = 'has-title';
}
if ( $this->is_view_type( 'circles' ) || $this->is_view_type( 'carousel' ) ) {
$view_classes[] = 'is-carousel';
}
return implode( ' ', $view_classes );
}
/**
* Gets the classes for renderer container.
*
* @since 1.5.0
*
* @return string
*/
protected function get_container_classes(): string {
$container_classes = [];
$container_classes[] = 'web-stories-list';
$container_classes[] = ! empty( $this->attributes['align'] ) ? sprintf( 'align%1$s', $this->attributes['align'] ) : 'alignnone';
$container_classes[] = ! empty( $this->attributes['class'] ) ? $this->attributes['class'] : '';
if ( ! empty( $this->attributes['show_archive_link'] ) ) {
$container_classes[] = 'has-archive-link';
}
$container_classes = array_filter( $container_classes );
$view_type_classes = $this->get_view_classes();
return sprintf( '%1$s %2$s', implode( ' ', $container_classes ), $view_type_classes );
}
/**
* Gets the single story container classes.
*
* @since 1.5.0
*
* @return string
*/
protected function get_single_story_classes(): string {
$single_story_classes = [];
$single_story_classes[] = 'web-stories-list__story';
if ( $this->context->is_amp() ) {
$single_story_classes[] = 'web-stories-list__story--amp';
}
if ( ! empty( $this->attributes['image_alignment'] ) && ( 'right' === $this->attributes['image_alignment'] ) ) {
$single_story_classes[] = 'image-align-right';
}
$classes = implode( ' ', $single_story_classes );
/**
* Filters the web stories renderer single story classes.
*
* @since 1.5.0
*
* @param string $classes Single story classes.
*/
return apply_filters( 'web_stories_renderer_single_story_classes', $classes );
}
/**
* Gets the single story container styles.
*
* @since 1.5.0
*
* @return string Style string.
*/
protected function get_container_styles(): string {
$story_styles = ! empty( $this->attributes['circle_size'] ) && $this->is_view_type( 'circles' ) ?
sprintf( '--ws-circle-size:%1$dpx', $this->attributes['circle_size'] ) :
'';
$story_styles .= $this->is_view_type( 'carousel' ) ? sprintf( '--ws-story-max-width:%1$dpx', $this->width ) : '';
/**
* Filters the web stories renderer single story classes.
*
* @since 1.5.0
*
* @param string $story_styles Single story classes.
*/
return apply_filters( 'web_stories_renderer_container_styles', $story_styles );
}
/**
* Renders a story with story's poster image.
*
* @since 1.5.0
*
* @return void
*/
protected function render_story_with_poster(): void {
/**
* Story object.
*
* @var Story $story
*/
$story = $this->current();
$poster_url = $story->get_poster_portrait();
$poster_srcset = $story->get_poster_srcset();
$poster_sizes = $story->get_poster_sizes();
if ( ! $poster_url ) {
?>
<div class="web-stories-list__story-poster">
<div class="web-stories-list__story-poster-placeholder">
<a href="<?php echo esc_url( $story->get_url() ); ?>" <?php $this->render_link_attributes(); ?>>
<?php echo esc_html( $story->get_title() ); ?>
</a>
</div>
</div>
<?php
} else {
?>
<div class="web-stories-list__story-poster">
<a href="<?php echo esc_url( $story->get_url() ); ?>" <?php $this->render_link_attributes(); ?>>
<img
src="<?php echo esc_url( $poster_url ); ?>"
alt="<?php echo esc_attr( $story->get_title() ); ?>"
width="<?php echo absint( $this->width ); ?>"
height="<?php echo absint( $this->height ); ?>"
<?php if ( ! empty( $poster_srcset ) ) { ?>
srcset="<?php echo esc_attr( $poster_srcset ); ?>"
<?php } ?>
<?php if ( ! empty( $poster_sizes ) ) { ?>
sizes="<?php echo esc_attr( $poster_sizes ); ?>"
<?php } ?>
loading="lazy"
decoding="async"
>
</a>
</div>
<?php
}
$this->get_content_overlay();
if ( ! $this->context->is_amp() ) {
$this->generate_lightbox_html( $story );
} else {
$this->generate_amp_lightbox_html_amp( $story );
}
}
/**
* Render additional link attributes.
*
* Allows customization of html attributes in the web stories widget anchor tag loop
* Converts array into escaped inline html attributes.
*
* @since 1.17.0
*
* @return void
*/
protected function render_link_attributes(): void {
/**
* The current story.
*
* @var Story $story
*/
$story = $this->current();
/**
* Filters the link attributes added to a story's <a> tag.
*
* @since 1.17.0
*
* @param array $attributes Key value array of attribute name to attribute value.
* @param Story $story The current story instance.
* @param int $position The current story's position within the list.
* @param string $view_type The current view type.
*/
$attributes = apply_filters( 'web_stories_renderer_link_attributes', [], $story, $this->position, $this->get_view_type() );
$attrs = [];
if ( ! empty( $attributes ) ) {
foreach ( $attributes as $attribute => $value ) {
$attrs[] = wp_kses_one_attr( $attribute . '="' . esc_attr( $value ) . '"', 'a' );
}
}
$attrs = array_filter( $attrs ); // Filter out empty values rejected by KSES.
//phpcs:disable WordPress.Security.EscapeOutput.OutputNotEscaped
echo implode( ' ', $attrs );
}
/**
* Renders the content overlay markup.
*
* @since 1.5.0
*
* @return void
*/
protected function get_content_overlay(): void {
/**
* Story object.
*
* @var Story $story
*/
$story = $this->current();
if ( empty( $this->content_overlay ) ) {
return;
}
?>
<div class="web-stories-list__story-content-overlay">
<?php if ( ! empty( $this->attributes['show_title'] ) ) { ?>
<div class="story-content-overlay__title">
<?php echo esc_html( $story->get_title() ); ?>
</div>
<?php } ?>
<?php if ( ! empty( $this->attributes['show_excerpt'] ) ) { ?>
<div class="story-content-overlay__excerpt">
<?php echo esc_html( $story->get_excerpt() ); ?>
</div>
<?php } ?>
<?php if ( ! empty( $story->get_author() ) ) { ?>
<div class="story-content-overlay__author">
<?php
/* translators: byline. %s: author name. */
echo esc_html( sprintf( __( 'By %s', 'web-stories' ), $story->get_author() ) );
?>
</div>
<?php } ?>
<?php if ( ! empty( $story->get_date() ) ) { ?>
<time class="story-content-overlay__date">
<?php
/* translators: %s: publish date. */
echo esc_html( sprintf( __( 'On %s', 'web-stories' ), $story->get_date() ) );
?>
</time>
<?php } ?>
</div>
<?php
}
/**
* Generate HTML for the non-AMP page request.
*
* @since 1.5.0
*
* @param Story $story Current Story.
* @return void
*/
protected function generate_lightbox_html( $story ): void {
// Start collecting markup for the lightbox stories. This way we don't have to re-run the loop.
ob_start();
// Collect story links to fill-in non-AMP lightbox 'amp-story-player'.
?>
<a href="<?php echo esc_url( $story->get_url() ); ?>" <?php $this->render_link_attributes(); ?>><?php echo esc_html( $story->get_title() ); ?></a>
<?php
$this->lightbox_html .= ob_get_clean();
}
/**
* Markup for the lightbox used on AMP pages.
*
* @since 1.5.0
*
* @param Story $story Current Story.
* @return void
*/
protected function generate_amp_lightbox_html_amp( $story ): void {
// Start collecting markup for the lightbox stories. This way we don't have to re-run the loop.
ob_start();
$lightbox_state = 'lightbox' . $story->get_id() . $this->instance_id;
$lightbox_id = 'lightbox-' . $story->get_id() . $this->instance_id;
?>
<amp-lightbox
id="<?php echo esc_attr( $lightbox_id ); ?>"
[open]="<?php echo esc_attr( $lightbox_state ); ?>"
layout="nodisplay"
on="lightboxClose:AMP.setState({<?php echo esc_attr( $lightbox_state ); ?>: false})"
role="button"
tabindex="0"
>
<div class="web-stories-list__lightbox show">
<button type="button"
class="story-lightbox__close-button"
on="tap:<?php echo esc_attr( $lightbox_id ); ?>.close"
aria-label="<?php esc_attr_e( 'Close', 'web-stories' ); ?>"
>
<span class="story-lightbox__close-button--stick"></span>
<span class="story-lightbox__close-button--stick"></span>
</button>
<amp-story-player
width="3.6"
height="6"
layout="responsive"
>
<a href="<?php echo esc_url( $story->get_url() ); ?>" <?php $this->render_link_attributes(); ?>><?php echo esc_html( $story->get_title() ); ?></a>
</amp-story-player>
</div>
</amp-lightbox>
<?php
$this->lightbox_html .= ob_get_clean();
}
}