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<?php |
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namespace Automattic\Jetpack\Sync; |
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use Automattic\Jetpack\Sync\Codec_Interface; |
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/** |
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* An implementation of Automattic\Jetpack\Sync\Codec_Interface that uses gzip's DEFLATE |
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* algorithm to compress objects serialized using json_encode |
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*/ |
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class JSON_Deflate_Array_Codec implements Codec_Interface { |
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const CODEC_NAME = 'deflate-json-array'; |
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public function name() { |
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return self::CODEC_NAME; |
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} |
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public function encode( $object ) { |
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return base64_encode( gzdeflate( $this->json_serialize( $object ) ) ); |
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} |
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public function decode( $input ) { |
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return $this->json_unserialize( gzinflate( base64_decode( $input ) ) ); |
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} |
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// @see https://gist.github.com/muhqu/820694 |
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protected function json_serialize( $any ) { |
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if ( function_exists( 'jetpack_json_wrap' ) ) { |
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return wp_json_encode( jetpack_json_wrap( $any ) ); |
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} |
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// This prevents fatal error when updating pre 6.0 via the cli command |
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return wp_json_encode( $this->json_wrap( $any ) ); |
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} |
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protected function json_unserialize( $str ) { |
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return $this->json_unwrap( json_decode( $str, true ) ); |
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} |
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View Code Duplication |
private function json_wrap( &$any, $seen_nodes = array() ) { |
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if ( is_object( $any ) ) { |
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$input = get_object_vars( $any ); |
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$input['__o'] = 1; |
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} else { |
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$input = &$any; |
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} |
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if ( is_array( $input ) ) { |
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$seen_nodes[] = &$any; |
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$return = array(); |
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foreach ( $input as $k => &$v ) { |
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if ( ( is_array( $v ) || is_object( $v ) ) ) { |
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if ( in_array( $v, $seen_nodes, true ) ) { |
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continue; |
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} |
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$return[ $k ] = $this->json_wrap( $v, $seen_nodes ); |
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} else { |
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$return[ $k ] = $v; |
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} |
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} |
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return $return; |
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} |
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return $any; |
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} |
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private function json_unwrap( $any ) { |
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if ( is_array( $any ) ) { |
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foreach ( $any as $k => $v ) { |
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if ( '__o' === $k ) { |
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continue; |
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} |
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$any[ $k ] = $this->json_unwrap( $v ); |
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} |
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if ( isset( $any['__o'] ) ) { |
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unset( $any['__o'] ); |
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$any = (object) $any; |
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} |
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} |
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return $any; |
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} |
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} |
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Automattic /
jetpack
