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<?php namespace Yoast\WP\SEO\Integrations\Front_End; use Yoast\WP\SEO\Conditionals\Front_End_Conditional; use Yoast\WP\SEO\Helpers\Options_Helper; use Yoast\WP\SEO\Integrations\Integration_Interface; /** * Class RSS_Footer_Embed. */ class RSS_Footer_Embed implements Integration_Interface { /** * The options helper. * * @var Options_Helper */ protected $options; /** * Returns the conditionals based in which this loadable should be active. * * @return array */ public static function get_conditionals() { return [ Front_End_Conditional::class ]; } /** * Sets the required helpers. * * @codeCoverageIgnore It only handles dependencies. * * @param Options_Helper $options The options helper. */ public function __construct( Options_Helper $options ) { $this->options = $options; } /** * Initializes the integration. * * This is the place to register hooks and filters. * * @return void */ public function register_hooks() { \add_filter( 'the_content_feed', [ $this, 'embed_rssfooter' ] ); \add_filter( 'the_excerpt_rss', [ $this, 'embed_rssfooter_excerpt' ] ); } /** * Adds the RSS footer (or header) to the full RSS feed item. * * @param string $content Feed item content. * * @return string */ public function embed_rssfooter( $content ) { if ( ! $this->include_rss_footer( 'full' ) ) { return $content; } return $this->embed_rss( $content ); } /** * Adds the RSS footer (or header) to the excerpt RSS feed item. * * @param string $content Feed item excerpt. * * @return string */ public function embed_rssfooter_excerpt( $content ) { if ( ! $this->include_rss_footer( 'excerpt' ) ) { return $content; } return $this->embed_rss( \wpautop( $content ) ); } /** * Checks if the RSS footer should included. * * @param string $context The context of the RSS content. * * @return bool Whether or not the RSS footer should included. */ protected function include_rss_footer( $context ) { if ( ! \is_feed() ) { return false; } /** * Filter: 'wpseo_include_rss_footer' - Allow the RSS footer to be dynamically shown/hidden. * * @param bool $show_embed Indicates if the RSS footer should be shown or not. * @param string $context The context of the RSS content - 'full' or 'excerpt'. */ if ( ! \apply_filters( 'wpseo_include_rss_footer', true, $context ) ) { return false; } return $this->is_configured(); } /** * Checks if the RSS feed fields are configured. * * @return bool True when one of the fields has a value. */ protected function is_configured() { return ( $this->options->get( 'rssbefore', '' ) !== '' || $this->options->get( 'rssafter', '' ) ); } /** * Adds the RSS footer and/or header to an RSS feed item. * * @param string $content Feed item content. * * @return string The content to add. */ protected function embed_rss( $content ) { $before = $this->rss_replace_vars( $this->options->get( 'rssbefore', '' ) ); $after = $this->rss_replace_vars( $this->options->get( 'rssafter', '' ) ); $content = $before . $content . $after; return $content; } /** * Replaces the possible RSS variables with their actual values. * * @param string $content The RSS content that should have the variables replaced. * * @return string */ protected function rss_replace_vars( $content ) { if ( $content === '' ) { return $content; } $replace_vars = $this->get_replace_vars( $this->get_link_template(), \get_post() ); $content = \stripslashes( \trim( $content ) ); $content = \str_ireplace( \array_keys( $replace_vars ), \array_values( $replace_vars ), $content ); return \wpautop( $content ); } /** * Retrieves the replacement variables. * * @codeCoverageIgnore It just contains too much WordPress functions. * * @param string $link_template The link template. * @param mixed $post The post to use. * * @return array The replacement variables. */ protected function get_replace_vars( $link_template, $post ) { $author_link = ''; if ( \is_object( $post ) ) { $author_link = \sprintf( $link_template, \esc_url( \get_author_posts_url( $post->post_author ) ), \esc_html( \get_the_author() ) ); } return [ '%%AUTHORLINK%%' => $author_link, '%%POSTLINK%%' => \sprintf( $link_template, \esc_url( \get_permalink() ), \esc_html( \get_the_title() ) ), '%%BLOGLINK%%' => \sprintf( $link_template, \esc_url( \get_bloginfo( 'url' ) ), \esc_html( \get_bloginfo( 'name' ) ) ), '%%BLOGDESCLINK%%' => \sprintf( $link_template, \esc_url( \get_bloginfo( 'url' ) ), \esc_html( \get_bloginfo( 'name' ) ) . ' - ' . \esc_html( \get_bloginfo( 'description' ) ) ), ]; } /** * Retrieves the link template. * * @return string The link template. */ protected function get_link_template() { /** * Filter: 'nofollow_rss_links' - Allow the developer to determine whether or not to follow the links in * the bits Yoast SEO adds to the RSS feed, defaults to false. * * @since 1.4.20 * * @param bool $unsigned Whether or not to follow the links in RSS feed, defaults to true. */ if ( \apply_filters( 'nofollow_rss_links', false ) ) { return '<a rel="nofollow" href="%1$s">%2$s</a>'; } return '<a href="%1$s">%2$s</a>'; } }
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