add ServerInfo DTO

build.gradle

@@ -26,6 +26,7 @@ dependencies {
 
     /* COMPONENTS */
     compile (group: 'com.google.guava', name: 'guava', version: '28.0-jre')
+    compile (group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.11.0')
 
     /* LOMBOK */
     annotationProcessor (group: 'org.projectlombok', name: 'lombok', version: lombok_version)

src/main/java/mc/protocol/dto/ServerInfo.java

@@ -0,0 +1,49 @@
+package mc.protocol.dto;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonRawValue;
+import com.fasterxml.jackson.databind.JsonNode;
+import lombok.Data;
+
+import java.util.List;
+import java.util.UUID;
+
+@JsonIgnoreProperties(ignoreUnknown = true)
+@Data
+public class ServerInfo {
+
+    private Version version;
+
+    @JsonProperty("players")
+    private PlayersInfo playersInfo;
+
+    //TODO необходимо реализовать объект типа Chat (см. https://wiki.vg/index.php?title=Chat&oldid=8329)
+    private JsonNode description;
+
+    @JsonProperty("favicon")
+    private String faviconBase64;
+    
+    @Data
+    public static class Version {
+        private String name;
+        private int protocol;
+    }
+
+    @Data
+    public static class PlayersInfo {
+
+        private int max;
+
+        private int online;
+
+        @JsonProperty("sample")
+        private List<SamplePlayer> samplePlayers;
+    }
+    
+    @Data
+    public static class SamplePlayer {
+        private UUID id;
+        private String name;
+    }
+}

src/main/java/mc/protocol/status/server/StatusServerResponse.java

@@ -1,7 +1,10 @@
 package mc.protocol.status.server;
 
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.Data;
 import mc.protocol.Packet;
+import mc.protocol.dto.ServerInfo;
 import mc.protocol.io.NetInputStream;
 import mc.protocol.io.NetOutputStream;
 
@@ -49,15 +52,41 @@ public class StatusServerResponse implements Packet {
      * }
      * </pre>
      */
-    private String info;
+    private String serverInfo;
+
+    private ServerInfo serverInfoDto;
+
+    public ServerInfo getServerInfoDto() {
+        if (serverInfoDto == null) {
+            try {
+                ObjectMapper mapper = new ObjectMapper();
+                serverInfoDto = mapper.readValue(serverInfo, ServerInfo.class);
+            } catch (JsonProcessingException e) {
+                e.printStackTrace();
+                return new ServerInfo();
+            }
+        }
+
+        return serverInfoDto;
+    }
 
     @Override
     public void readSelf(NetInputStream netInputStream) {
-        info = netInputStream.readString();
+        serverInfo = netInputStream.readString();
     }
 
     @Override
     public void writeSelf(NetOutputStream netOutputStream) {
-        netOutputStream.writeString(info);
+        if (serverInfo == null) {
+            try {
+                ObjectMapper mapper = new ObjectMapper();
+                serverInfo = mapper.writeValueAsString(serverInfoDto);
+            } catch (JsonProcessingException e) {
+                e.printStackTrace();
+                serverInfo = "{}";
+            }
+        }
+
+        netOutputStream.writeString(serverInfo);
     }
 }