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<?php |
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namespace epiphyt\Embed_Privacy\embed; |
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|
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use DOMDocument; |
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use DOMElement; |
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use DOMNode; |
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use epiphyt\Embed_Privacy\data\Providers; |
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use epiphyt\Embed_Privacy\data\Replacer; |
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use epiphyt\Embed_Privacy\Embed_Privacy; |
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|
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/** |
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* Embed replacement representation. |
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* |
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* @author Epiphyt |
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* @license GPL2 |
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* @package epiphyt\Embed_Privacy |
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* @since 1.10.0 |
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*/ |
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final class Replacement { |
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/** |
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* @var string Original content |
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*/ |
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private $content = ''; |
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|
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/** |
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* @var \epiphyt\Embed_privacy\embed\Provider Provider of this overlay |
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*/ |
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private $provider; |
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|
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/** |
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* @var array List of replacements |
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*/ |
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private $replacements = []; |
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|
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/** |
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* Replacement constructor |
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* |
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* @param string $content Original embedded content |
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* @param string $url Embedded content URL |
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*/ |
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public function __construct( $content, $url = '' ) { |
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$this->content = $content; |
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$this->set_provider( $content, $url ); |
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} |
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|
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/** |
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* Get the content with an overlay. |
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* |
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* @param array $attributes Embed attributes |
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* @return string Content with embeds replaced by an overlay |
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*/ |
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public function get( array $attributes = [] ) { |
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/** |
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* Filter the content after it has been replaced with an overlay. |
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* |
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* @since 1.10.0 |
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* |
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* @param string $content Replaced content |
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*/ |
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$content = (string) \apply_filters( 'embed_privacy_overlay_replaced_content', $this->content ); |
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|
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/** |
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* If set to true, unknown providers are not handled via Embed Privacy. |
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* |
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* @since 1.5.0 |
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* |
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* @param bool $ignore_unknown Whether unknown providers should be ignored |
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* @param string $content The original content |
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*/ |
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$ignore_unknown_providers = \apply_filters( 'embed_privacy_ignore_unknown_providers', false, $content ); |
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|
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// get default external content |
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// special case for youtube-nocookie.com as it is part of YouTube provider |
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// and gets rewritten in Divi |
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// see: https://github.com/epiphyt/embed-privacy/issues/69 |
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if ( |
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! $ignore_unknown_providers |
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&& ( |
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! \str_contains( $content, 'youtube-nocookie.com' ) |
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|| ! Providers::is_always_active( 'youtube' ) |
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) |
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) { |
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$attributes['check_always_active'] = true; |
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$new_content = $this->replace_content( $content, $attributes ); |
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|
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if ( $new_content !== $content ) { |
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Embed_Privacy::get_instance()->has_embed = true; |
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Embed_Privacy::get_instance()->frontend->print_assets(); |
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$content = $new_content; |
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} |
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} |
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|
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return $content; |
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} |
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|
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/** |
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* Get a list of characters to replace to prevent problems with DOMDocument. |
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* |
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* @return array List of character replacements |
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*/ |
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private static function get_character_replacements() { |
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$replacements = [ |
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'%' => '@@epi_percentage', |
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' ' => ' data-epi-spacing ', |
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'[' => '@@epi_square_bracket_start', |
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']' => '@@epi_square_bracket_end', |
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'{' => '@@epi_curly_bracket_start', |
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'}' => '@@epi_curly_bracket_end', |
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]; |
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|
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/** |
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* Filter character replacements. |
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* |
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* @param array $replacements Current replacements |
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*/ |
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$replacements = (array) \apply_filters( 'embed_privacy_overlay_character_replacements', $replacements ); |
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|
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return $replacements; |
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} |
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|
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/** |
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* Get the overlay provider. |
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* |
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* @return \epiphyt\Embed_privacy\embed\Provider Provider object |
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*/ |
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public function get_provider() { |
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return $this->provider; |
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} |
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|
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/** |
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* Replace embedded content with an overlay. |
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* |
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* @param string $content Content to replace embeds in |
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* @param array $attributes Additional attributes |
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* @return string Updated content |
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*/ |
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private function replace_content( $content, $attributes ) { |
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if ( empty( $content ) ) { |
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return $content; |
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} |
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|
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if ( ! $this->provider instanceof Provider ) { |
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return $content; |
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} |
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|
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/** |
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* Filter whether to ignore this embed. |
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* |
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* @since 1.9.0 |
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* |
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* @param bool $ignore_embed Whether to ignore this embed |
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* @param string $content The original content |
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* @param string $provider_title Embed provider title |
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* @param string $provider_name Embed provider name |
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* @param array $attributes Additional attributes |
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*/ |
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$ignore_embed = (bool) \apply_filters( 'embed_privacy_ignore_embed', false, $content, $this->provider->get_title(), $this->provider->get_name(), $attributes ); |
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|
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if ( $ignore_embed ) { |
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return $content; |
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} |
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|
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$attributes = \wp_parse_args( $attributes, [ |
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'additional_checks' => [], |
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'check_always_active' => false, |
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'elements' => [ 'embed', 'iframe', 'object' ], |
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'element_attribute' => 'src', |
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'height' => 0, |
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'ignore_aspect_ratio' => false, |
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'is_oembed' => false, |
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'regex' => Replacer::extend_pattern( $this->provider->get_pattern(), $this->provider ), |
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'strip_newlines' => ! \has_blocks( $content ), |
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'width' => 0, |
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] ); |
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|
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if ( $attributes['is_oembed'] ) { |
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return Template::get( $this->provider, $content, $attributes ); |
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} |
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|
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\libxml_use_internal_errors( true ); |
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$dom = new DOMDocument(); |
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$character_replacements = self::get_character_replacements(); |
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$dom->loadHTML( |
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'<html><meta charset="utf-8">' . \str_replace( |
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\array_keys( $character_replacements ), |
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\array_values( $character_replacements ), |
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$content |
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) . '</html>', |
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\LIBXML_HTML_NOIMPLIED | \LIBXML_HTML_NODEFDTD |
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); |
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$template_dom = new DOMDocument(); |
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// detect domain if WordPress is installed on a sub domain |
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$host = \wp_parse_url( \home_url(), \PHP_URL_HOST ); |
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|
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if ( ! \filter_var( $host, \FILTER_VALIDATE_IP ) ) { |
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$host_array = \explode( '.', \str_replace( 'www.', '', $host ) ); |
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$tld_count = \count( $host_array ); |
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|
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if ( $tld_count >= 3 && \strlen( $host_array[ $tld_count - 2 ] ) === 2 ) { |
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$host = \implode( '.', \array_splice( $host_array, $tld_count - 3, 3 ) ); |
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} |
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else if ( $tld_count >= 2 ) { |
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$host = \implode( '.', \array_splice( $host_array, $tld_count - 2, $tld_count ) ); |
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} |
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} |
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|
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foreach ( $attributes['elements'] as $tag ) { |
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$replacements = []; |
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|
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if ( $tag === 'object' ) { |
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$attributes['element_attribute'] = 'data'; |
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} |
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|
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/** @var \DOMElement $element */ |
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foreach ( $dom->getElementsByTagName( $tag ) as $element ) { |
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if ( ! Embed_Privacy::get_instance()->run_checks( $attributes['additional_checks'], $element ) ) { |
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continue; |
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} |
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|
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// ignore embeds from the same (sub-)domain |
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if ( \preg_match( '/https?:\/\/(.*\.)?' . \preg_quote( $host, '/' ) . '/', $element->getAttribute( $attributes['element_attribute'] ) ) ) { |
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continue; |
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} |
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|
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if ( |
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! empty( $attributes['regex'] ) |
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&& ! \preg_match( $attributes['regex'], $element->getAttribute( $attributes['element_attribute'] ) ) |
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) { |
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continue; |
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} |
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|
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// providers need to be explicitly checked if they're always active |
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// see https://github.com/epiphyt/embed-privacy/issues/115 |
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if ( $attributes['check_always_active'] && Providers::is_always_active( $this->provider->get_name() ) ) { |
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if ( ! empty( $attributes['assets'] ) ) { |
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$content = Assets::get_static( $attributes['assets'], $content ); |
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} |
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|
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return $content; |
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} |
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|
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if ( $this->provider->is_unknown() ) { |
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$embedded_host = \wp_parse_url( $element->getAttribute( $attributes['element_attribute'] ), \PHP_URL_HOST ); |
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|
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// embeds with relative paths have no host |
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// and they are local by definition, so do nothing |
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// see https://github.com/epiphyt/embed-privacy/issues/27 |
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if ( empty( $embedded_host ) ) { |
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return $content; |
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} |
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|
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$this->provider->set_title( $embedded_host ); |
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$this->provider->set_name( \sanitize_title( $embedded_host ) ); |
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|
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// unknown providers need to be explicitly checked if they're always active |
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// see https://github.com/epiphyt/embed-privacy/issues/115 |
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if ( |
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$attributes['check_always_active'] |
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&& Providers::is_always_active( $this->provider->get_name() ) |
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) { |
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if ( ! empty( $attributes['assets'] ) ) { |
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$content = Assets::get_static( $attributes['assets'], $content ); |
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} |
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|
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return $content; |
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} |
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|
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// check URL for available provider |
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foreach ( Providers::get_instance()->get_list() as $provider ) { |
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if ( |
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$provider->is_matching( $element->getAttribute( $attributes['element_attribute'] ) ) |
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&& empty( $replacements ) |
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) { |
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continue 2; |
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} |
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} |
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} |
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|
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/* translators: embed title */ |
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$attributes['embed_title'] = $element->hasAttribute( 'title' ) ? $element->getAttribute( 'title' ) : ''; |
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$attributes['embed_url'] = $element->getAttribute( $attributes['element_attribute'] ); |
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$attributes['height'] = $element->hasAttribute( 'height' ) ? $element->getAttribute( 'height' ) : 0; |
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$attributes['width'] = $element->hasAttribute( 'width' ) ? $element->getAttribute( 'width' ) : 0; |
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|
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// get overlay template as DOM element |
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$template_dom->loadHTML( |
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'<html><meta charset="utf-8">' . \str_replace( '%', '%_epi_', Template::get( $this->provider, $dom->saveHTML( $element ), $attributes ) ) . '</html>', |
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\LIBXML_HTML_NOIMPLIED | \LIBXML_HTML_NODEFDTD |
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); |
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$overlay = null; |
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|
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/** @var \DOMElement $div */ |
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foreach ( $template_dom->getElementsByTagName( 'div' ) as $div ) { |
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if ( \stripos( $div->getAttribute( 'class' ), 'embed-privacy-container' ) !== false ) { |
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$overlay = $div; |
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break; |
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} |
| 298 |
} |
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|
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// store the elements to replace (see regressive loop down below) |
| 301 |
if ( $overlay instanceof DOMNode || $overlay instanceof DOMElement ) { |
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$replacements[] = [ |
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'element' => $element, |
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'replace' => $dom->importNode( $overlay, true ), |
| 305 |
]; |
| 306 |
} |
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|
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// reset embed provider name |
| 309 |
if ( $this->provider->is_unknown() ) { |
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$this->provider->set_name( '' ); |
| 311 |
$this->provider->set_title( '' ); |
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} |
| 313 |
} |
| 314 |
|
| 315 |
if ( ! empty( $replacements ) ) { |
| 316 |
$this->replacements = \array_merge( $this->replacements, $replacements ); |
| 317 |
Embed_Privacy::get_instance()->has_embed = true; |
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$elements = $dom->getElementsByTagName( $tag ); |
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$i = $elements->length - 1; |
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|
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// use regressive loop for replaceChild() |
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// see: https://www.php.net/manual/en/domnode.replacechild.php#50500 |
| 323 |
while ( $i > -1 ) { |
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$element = $elements->item( $i ); |
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|
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foreach ( $replacements as $replacement ) { |
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if ( $replacement['element'] === $element ) { |
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$element->parentNode->replaceChild( $replacement['replace'], $replacement['element'] ); // phpcs:ignore WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase |
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} |
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} |
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|
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--$i; |
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} |
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|
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$content = $dom->saveHTML( $dom->documentElement ); // phpcs:ignore WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase |
| 336 |
} |
| 337 |
} |
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|
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\libxml_use_internal_errors( false ); |
| 340 |
|
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// embeds for other elements need to be handled manually |
| 342 |
// make sure to test before if the regex matches |
| 343 |
// see: https://github.com/epiphyt/embed-privacy/issues/26 |
| 344 |
if ( |
| 345 |
empty( $this->replacements ) |
| 346 |
&& ! empty( $attributes['regex'] ) |
| 347 |
&& ! $this->provider->is_unknown() |
| 348 |
&& ! $this->provider->is_disabled() |
| 349 |
&& \preg_match( $attributes['regex'], $content, $matches ) !== false |
| 350 |
) { |
| 351 |
$content = \preg_replace( |
| 352 |
$attributes['regex'], |
| 353 |
Template::get( |
| 354 |
$this->provider, |
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$matches[0], |
| 356 |
$attributes |
| 357 |
), |
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$content, |
| 359 |
1 |
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); |
| 361 |
} |
| 362 |
|
| 363 |
// decode to make sure there is nothing left encoded if replacements have been made |
| 364 |
// otherwise, content is untouched by DOMDocument, and we don't need a decoding |
| 365 |
// only required for WPBakery Page Builder |
| 366 |
if ( ! empty( $this->replacements ) && \str_contains( 'vc_row', $content ) ) { |
| 367 |
$content = \rawurldecode( $content ); |
| 368 |
} |
| 369 |
|
| 370 |
return \str_replace( |
| 371 |
\array_merge( |
| 372 |
[ |
| 373 |
'<html><meta charset="utf-8">', |
| 374 |
'</html>', |
| 375 |
'%20data-epi-spacing%20', |
| 376 |
], |
| 377 |
\array_values( $character_replacements ) |
| 378 |
), |
| 379 |
\array_merge( |
| 380 |
[ |
| 381 |
'', |
| 382 |
'', |
| 383 |
' ', |
| 384 |
], |
| 385 |
\array_keys( $character_replacements ) |
| 386 |
), |
| 387 |
$content |
| 388 |
); |
| 389 |
} |
| 390 |
|
| 391 |
/** |
| 392 |
* Set the provider for this overlay. |
| 393 |
* |
| 394 |
* @param string $content Content to get the provider from |
| 395 |
* @param string $url URL to the embedded content |
| 396 |
*/ |
| 397 |
private function set_provider( $content, $url = '' ) { |
| 398 |
$providers = Providers::get_instance()->get_list(); |
| 399 |
|
| 400 |
foreach ( $providers as $provider ) { |
| 401 |
if ( |
| 402 |
$provider->is_matching( |
| 403 |
$content, |
| 404 |
Replacer::extend_pattern( $provider->get_pattern(), $provider ) |
| 405 |
) |
| 406 |
|| ( ! empty( $url ) && $provider->is_matching( $url ) ) |
| 407 |
) { |
| 408 |
$this->provider = $provider; |
| 409 |
break; |
| 410 |
} |
| 411 |
} |
| 412 |
|
| 413 |
// support unknown oEmbed provider |
| 414 |
// see https://github.com/epiphyt/embed-privacy/issues/89 |
| 415 |
if ( $this->provider === null && ! empty( $url ) ) { |
| 416 |
$parsed_url = \wp_parse_url( $url ); |
| 417 |
$provider = isset( $parsed_url['host'] ) ? $parsed_url['host'] : ''; |
| 418 |
$this->provider = new Provider(); |
| 419 |
$this->provider->set_name( $provider ); |
| 420 |
$this->provider->set_title( $provider ); |
| 421 |
} |
| 422 |
|
| 423 |
/** |
| 424 |
* Filter the overlay provider. |
| 425 |
* |
| 426 |
* @param \epiphyt\Embed_Privacy\embed\Provider $provider Current provider |
| 427 |
* @param string $content Content to get the provider from |
| 428 |
* @param string $url URL to the embedded content |
| 429 |
*/ |
| 430 |
$this->provider = \apply_filters( 'embed_privacy_overlay_provider', $this->provider, $content, $url ); |
| 431 |
} |
| 432 |
} |
| 433 |
|
