| 1 |
<?php |
| 2 |
namespace epiphyt\Embed_Privacy\data; |
| 3 |
|
| 4 |
use epiphyt\Embed_Privacy\embed\Replacement; |
| 5 |
use epiphyt\Embed_Privacy\Embed_Privacy; |
| 6 |
use epiphyt\Embed_Privacy\handler\Oembed; |
| 7 |
use epiphyt\Embed_Privacy\integration\X; |
| 8 |
|
| 9 |
/** |
| 10 |
* Replacer functionality. |
| 11 |
* |
| 12 |
* @author Epiphyt |
| 13 |
* @license GPL2 |
| 14 |
* @package epiphyt\Embed_Privacy |
| 15 |
* @since 1.10.0 |
| 16 |
*/ |
| 17 |
final class Replacer { |
| 18 |
/** |
| 19 |
* Extend a regular expression pattern with certain tags. |
| 20 |
* |
| 21 |
* @param string $pattern Pattern to extend |
| 22 |
* @param \epiphyt\Embed_privacy\embed\Provider|null $provider Current embed provider |
| 23 |
* @return string Extended pattern |
| 24 |
*/ |
| 25 |
public static function extend_pattern( $pattern, $provider ) { |
| 26 |
if ( empty( $pattern ) ) { |
| 27 |
return $pattern; |
| 28 |
} |
| 29 |
|
| 30 |
if ( \str_contains( $pattern, '<' ) && \str_contains( $pattern, '>' ) ) { |
| 31 |
return $pattern; |
| 32 |
} |
| 33 |
|
| 34 |
$allowed_tags = [ |
| 35 |
'blockquote', |
| 36 |
'div', |
| 37 |
'embed', |
| 38 |
'iframe', |
| 39 |
'object', |
| 40 |
]; |
| 41 |
|
| 42 |
/** |
| 43 |
* Filter allowed HTML tags in regular expressions. |
| 44 |
* Only elements matching these tags get processed. |
| 45 |
* |
| 46 |
* @deprecated 1.10.0 Use embed_privacy_replacer_matcher_elements instead |
| 47 |
* @since 1.6.0 |
| 48 |
* |
| 49 |
* @param string[] $allowed_tags The allowed tags |
| 50 |
* @param string $provider_name The embed provider without spaces and in lowercase |
| 51 |
* @return array A list of allowed tags |
| 52 |
*/ |
| 53 |
$allowed_tags = \apply_filters_deprecated( |
| 54 |
'embed_privacy_matcher_elements', |
| 55 |
[ |
| 56 |
$allowed_tags, |
| 57 |
$provider->get_name(), |
| 58 |
], |
| 59 |
'1.10.0', |
| 60 |
'embed_privacy_replacer_matcher_elements' |
| 61 |
); |
| 62 |
|
| 63 |
/** |
| 64 |
* Filter allowed HTML tags in regular expressions. |
| 65 |
* Only elements matching these tags get processed. |
| 66 |
* |
| 67 |
* @since 1.10.0 |
| 68 |
* |
| 69 |
* @param string[] $allowed_tags List of allowed tags |
| 70 |
* @param \epiphyt\Embed_privacy\embed\Provider|null $provider Embed provider |
| 71 |
* @return array Updated list of allowed tags |
| 72 |
*/ |
| 73 |
$allowed_tags = (array) \apply_filters( 'embed_privacy_replacer_matcher_elements', $allowed_tags, $provider ); |
| 74 |
|
| 75 |
$tags_regex = '(' . \implode( '|', \array_filter( $allowed_tags, static function( $tag ) { |
| 76 |
return \preg_quote( $tag, '/' ); |
| 77 |
} ) ) . ')'; |
| 78 |
$pattern = '/<' . $tags_regex . '([^"]*)"([^<]*)(?<original_pattern>' . \trim( $pattern, '/' ) . ')([^"]*)"([^>]*)(>(.*?)<\/' . $tags_regex . ')?>/'; |
| 79 |
|
| 80 |
return $pattern; |
| 81 |
} |
| 82 |
|
| 83 |
/** |
| 84 |
* Replace embeds with a container and hide the embed with an HTML comment. |
| 85 |
* |
| 86 |
* @param string $content The original content |
| 87 |
* @param string $tag The shortcode tag if called via do_shortcode |
| 88 |
* @return string The updated content |
| 89 |
*/ |
| 90 |
public static function replace_embeds( $content, $tag = '' ) { |
| 91 |
$embed_privacy = Embed_Privacy::get_instance(); |
| 92 |
|
| 93 |
// do nothing in admin |
| 94 |
if ( ! $embed_privacy->use_cache ) { |
| 95 |
return $content; |
| 96 |
} |
| 97 |
|
| 98 |
if ( $embed_privacy->is_ignored_request ) { |
| 99 |
return $content; |
| 100 |
} |
| 101 |
|
| 102 |
// do nothing for ignored shortcodes |
| 103 |
if ( ! empty( $tag ) && \in_array( $tag, $embed_privacy->shortcode->get_ignored(), true ) ) { |
| 104 |
return $content; |
| 105 |
} |
| 106 |
|
| 107 |
// check content for already available embeds |
| 108 |
if ( ! $embed_privacy->has_embed && \str_contains( $content, '<div class="embed-privacy-overlay">' ) ) { |
| 109 |
$embed_privacy->has_embed = true; |
| 110 |
} |
| 111 |
|
| 112 |
$new_content = $content; |
| 113 |
$replacement = new Replacement( $new_content ); |
| 114 |
$new_content = $replacement->get(); |
| 115 |
|
| 116 |
while ( $new_content !== $content ) { |
| 117 |
$content = $new_content; |
| 118 |
$replacement = new Replacement( $new_content ); |
| 119 |
$new_content = $replacement->get(); |
| 120 |
} |
| 121 |
|
| 122 |
return $new_content; |
| 123 |
} |
| 124 |
|
| 125 |
/** |
| 126 |
* Replace oembed embeds with a container and hide the embed with an HTML comment. |
| 127 |
* |
| 128 |
* @param string $output The original output |
| 129 |
* @param string $url The URL to the embed |
| 130 |
* @param array $attributes Additional attributes of the embed |
| 131 |
* @return string The updated embed code |
| 132 |
*/ |
| 133 |
public static function replace_oembed( $output, $url, array $attributes ) { |
| 134 |
$embed_privacy = Embed_Privacy::get_instance(); |
| 135 |
|
| 136 |
// do nothing in admin |
| 137 |
if ( ! $embed_privacy->use_cache ) { |
| 138 |
return $output; |
| 139 |
} |
| 140 |
|
| 141 |
if ( $embed_privacy->is_ignored_request ) { |
| 142 |
return $output; |
| 143 |
} |
| 144 |
|
| 145 |
// ignore embeds without host (ie. relative URLs) |
| 146 |
if ( ! empty( $url ) && empty( \wp_parse_url( $url, \PHP_URL_HOST ) ) ) { |
| 147 |
return $output; |
| 148 |
} |
| 149 |
|
| 150 |
// check the current host |
| 151 |
// see: https://github.com/epiphyt/embed-privacy/issues/24 |
| 152 |
if ( \str_contains( $url, \wp_parse_url( \home_url(), \PHP_URL_HOST ) ) ) { |
| 153 |
return $output; |
| 154 |
} |
| 155 |
|
| 156 |
$replacement = new Replacement( $output, $url ); |
| 157 |
|
| 158 |
foreach ( $replacement->get_providers() as $provider ) { |
| 159 |
// make sure to only run once |
| 160 |
if ( \str_contains( $output, 'data-embed-provider="' . $provider->get_name() . '"' ) ) { |
| 161 |
return $output; |
| 162 |
} |
| 163 |
|
| 164 |
$embed_title = Oembed::get_title( $output ); |
| 165 |
/* translators: embed title */ |
| 166 |
$attributes['embed_title'] = ! empty( $embed_title ) ? $embed_title : ''; |
| 167 |
$attributes['embed_url'] = $url; |
| 168 |
$attributes['is_oembed'] = true; |
| 169 |
$attributes['strip_newlines'] = true; |
| 170 |
|
| 171 |
// the default dimensions are useless |
| 172 |
// so ignore them if recognized as such |
| 173 |
$defaults = \wp_embed_defaults( $url ); |
| 174 |
|
| 175 |
if ( |
| 176 |
! empty( $attributes['height'] ) && $attributes['height'] === $defaults['height'] |
| 177 |
&& ! empty( $attributes['width'] ) && $attributes['width'] === $defaults['width'] |
| 178 |
) { |
| 179 |
unset( $attributes['height'], $attributes['width'] ); |
| 180 |
|
| 181 |
$dimensions = Oembed::get_dimensions( $output ); |
| 182 |
|
| 183 |
if ( ! empty( $dimensions ) ) { |
| 184 |
$attributes = \array_merge( $attributes, $dimensions ); |
| 185 |
} |
| 186 |
} |
| 187 |
|
| 188 |
// check for local tweets |
| 189 |
if ( $provider->is( 'x' ) && \get_option( 'embed_privacy_local_tweets' ) ) { |
| 190 |
return X::get_local_tweet( $output ); |
| 191 |
} |
| 192 |
|
| 193 |
$output = $replacement->get( $attributes, $provider ); |
| 194 |
} |
| 195 |
|
| 196 |
return $output; |
| 197 |
} |
| 198 |
|
| 199 |
/** |
| 200 |
* Replace video shortcode embeds. |
| 201 |
* |
| 202 |
* @param string $output Video shortcode HTML output |
| 203 |
* @param array $attributes Array of video shortcode attributes |
| 204 |
* @return string Updated embed code |
| 205 |
*/ |
| 206 |
public static function replace_video_shortcode( $output, array $attributes ) { |
| 207 |
$url = isset( $attributes['src'] ) ? $attributes['src'] : ''; |
| 208 |
|
| 209 |
if ( empty( $url ) && ! empty( $attributes['mp4'] ) ) { |
| 210 |
$url = $attributes['mp4']; |
| 211 |
} |
| 212 |
else if ( empty( $url ) && ! empty( $attributes['m4v'] ) ) { |
| 213 |
$url = $attributes['m4v']; |
| 214 |
} |
| 215 |
else if ( empty( $url ) && ! empty( $attributes['webm'] ) ) { |
| 216 |
$url = $attributes['webm']; |
| 217 |
} |
| 218 |
else if ( empty( $url ) && ! empty( $attributes['ogv'] ) ) { |
| 219 |
$url = $attributes['ogv']; |
| 220 |
} |
| 221 |
else if ( empty( $url ) && ! empty( $attributes['flv'] ) ) { |
| 222 |
$url = $attributes['flv']; |
| 223 |
} |
| 224 |
|
| 225 |
// ignore relative URLs |
| 226 |
if ( empty( \wp_parse_url( $url, \PHP_URL_HOST ) ) ) { |
| 227 |
return $output; |
| 228 |
} |
| 229 |
|
| 230 |
return self::replace_oembed( $output, $url, $attributes ); |
| 231 |
} |
| 232 |
} |
| 233 |
|
