1 files changed, 80 insertions, 0 deletions
diff --git a/plugins/jetpack/sync/class.jetpack-sync-json-deflate-array-codec.php b/plugins/jetpack/sync/class.jetpack-sync-json-deflate-array-codec.php
new file mode 100644
index 00000000..15668bc5
--- /dev/null
+++ b/plugins/jetpack/sync/class.jetpack-sync-json-deflate-array-codec.php
@@ -0,0 +1,80 @@
+<?php
+
+require_once dirname( __FILE__ ) . '/interface.jetpack-sync-codec.php';
+
+/**
+ * An implementation of iJetpack_Sync_Codec that uses gzip's DEFLATE
+ * algorithm to compress objects serialized using json_encode
+ */
+class Jetpack_Sync_JSON_Deflate_Array_Codec implements iJetpack_Sync_Codec {
+	const CODEC_NAME = "deflate-json-array";
+	
+	public function name() {
+		return self::CODEC_NAME;
+	}
+	
+	public function encode( $object ) {
+		return base64_encode( gzdeflate( $this->json_serialize( $object ) ) );
+	}
+
+	public function decode( $input ) {
+		return $this->json_unserialize( gzinflate( base64_decode( $input ) ) );
+	}
+
+	// @see https://gist.github.com/muhqu/820694
+	private function json_serialize( $any ) {
+		return json_encode( $this->json_wrap( $any ) );
+	}
+
+	private function json_unserialize( $str ) {
+		return $this->json_unwrap( json_decode( $str, true ) );
+	}
+
+	private function json_wrap( &$any, $seen_nodes = array() ) {
+		if ( is_object( $any ) ) {
+			$input = get_object_vars( $any );
+			$input['__o'] = 1;
+		} else {
+			$input = &$any;
+		}
+
+		if ( is_array( $input ) ) {
+			$seen_nodes[] = &$any;
+
+			$return = array();
+
+			foreach ( $input as $k => &$v ) {
+				if ( ( is_array( $v ) || is_object( $v ) ) ) {
+					if ( in_array( $v, $seen_nodes, true ) ) {
+						continue;
+					} 
+					$return[ $k ] = $this->json_wrap( $v, $seen_nodes );
+				} else {
+					$return[ $k ] = $v;	
+				}
+			}
+
+			return $return;
+		}
+
+		return $any;
+	}
+
+	private function json_unwrap( $any ) {
+		if ( is_array( $any ) ) {
+			foreach ( $any as $k => $v ) {
+				if ( '__o' === $k ) {
+					continue;
+				}
+				$any[ $k ] = $this->json_unwrap( $v );
+			}
+
+			if ( isset( $any['__o'] ) ) {
+				unset( $any['__o'] );
+				$any = (object) $any;
+			}
+		}
+
+		return $any;
+	}
+}
+\ No newline at end of file