class.jetpack-sync-json-deflate-array-codec.php
| 1 | <?php |
| 2 | |
| 3 | require_once dirname( __FILE__ ) . '/interface.jetpack-sync-codec.php'; |
| 4 | |
| 5 | /** |
| 6 | * An implementation of iJetpack_Sync_Codec that uses gzip's DEFLATE |
| 7 | * algorithm to compress objects serialized using json_encode |
| 8 | */ |
| 9 | class Jetpack_Sync_JSON_Deflate_Array_Codec implements iJetpack_Sync_Codec { |
| 10 | const CODEC_NAME = "deflate-json-array"; |
| 11 | |
| 12 | public function name() { |
| 13 | return self::CODEC_NAME; |
| 14 | } |
| 15 | |
| 16 | public function encode( $object ) { |
| 17 | return base64_encode( gzdeflate( $this->json_serialize( $object ) ) ); |
| 18 | } |
| 19 | |
| 20 | public function decode( $input ) { |
| 21 | return $this->json_unserialize( gzinflate( base64_decode( $input ) ) ); |
| 22 | } |
| 23 | |
| 24 | // @see https://gist.github.com/muhqu/820694 |
| 25 | |
| 26 | protected function json_serialize( $any ) { |
| 27 | if ( function_exists( 'jetpack_json_wrap' ) ) { |
| 28 | return wp_json_encode( jetpack_json_wrap( $any ) ); |
| 29 | } |
| 30 | // This prevents fatal error when updating pre 6.0 via the cli command |
| 31 | return wp_json_encode( $this->json_wrap( $any ) ); |
| 32 | } |
| 33 | |
| 34 | protected function json_unserialize( $str ) { |
| 35 | return $this->json_unwrap( json_decode( $str, true ) ); |
| 36 | } |
| 37 | |
| 38 | private function json_wrap( &$any, $seen_nodes = array() ) { |
| 39 | if ( is_object( $any ) ) { |
| 40 | $input = get_object_vars( $any ); |
| 41 | $input['__o'] = 1; |
| 42 | } else { |
| 43 | $input = &$any; |
| 44 | } |
| 45 | |
| 46 | if ( is_array( $input ) ) { |
| 47 | $seen_nodes[] = &$any; |
| 48 | |
| 49 | $return = array(); |
| 50 | |
| 51 | foreach ( $input as $k => &$v ) { |
| 52 | if ( ( is_array( $v ) || is_object( $v ) ) ) { |
| 53 | if ( in_array( $v, $seen_nodes, true ) ) { |
| 54 | continue; |
| 55 | } |
| 56 | $return[ $k ] = $this->json_wrap( $v, $seen_nodes ); |
| 57 | } else { |
| 58 | $return[ $k ] = $v; |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | return $return; |
| 63 | } |
| 64 | |
| 65 | return $any; |
| 66 | } |
| 67 | |
| 68 | private function json_unwrap( $any ) { |
| 69 | if ( is_array( $any ) ) { |
| 70 | foreach ( $any as $k => $v ) { |
| 71 | if ( '__o' === $k ) { |
| 72 | continue; |
| 73 | } |
| 74 | $any[ $k ] = $this->json_unwrap( $v ); |
| 75 | } |
| 76 | |
| 77 | if ( isset( $any['__o'] ) ) { |
| 78 | unset( $any['__o'] ); |
| 79 | $any = (object) $any; |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | return $any; |
| 84 | } |
| 85 | } |
| 86 |