feat: implemented proper Request serialization

src/main/java/uulm/teamname/marvelous/gamelibrary/json/ingame/RequestSerializer.java

@@ -0,0 +1,83 @@
+package uulm.teamname.marvelous.gamelibrary.json.ingame;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+import uulm.teamname.marvelous.gamelibrary.entities.EntityID;
+import uulm.teamname.marvelous.gamelibrary.entities.EntityType;
+import uulm.teamname.marvelous.gamelibrary.requests.CharacterRequest;
+import uulm.teamname.marvelous.gamelibrary.requests.GameRequest;
+import uulm.teamname.marvelous.gamelibrary.requests.Request;
+import uulm.teamname.marvelous.gamelibrary.requests.RequestType;
+
+import java.io.IOException;
+
+public class RequestSerializer extends StdSerializer<Request> {
+
+    public RequestSerializer() {
+        this(null);
+    }
+
+    protected RequestSerializer(Class<Request> t) {
+        super(t);
+    }
+
+    @Override
+    public void serialize(Request value, JsonGenerator gen, SerializerProvider provider) throws IOException {
+
+        gen.writeStartObject();
+        gen.writeObjectField("requestType", value.type);
+
+
+        if (value instanceof GameRequest) {
+            serializeGameRequest((GameRequest) value, gen, provider);
+        } else if (value instanceof CharacterRequest) {
+            serializeCharacterRequest((CharacterRequest) value, gen, provider);
+        }
+
+        gen.writeEndObject();
+    }
+
+    /** Method invoked after writing the RequestType, and used to write any additional values required */
+    private void serializeGameRequest(GameRequest value, JsonGenerator gen, SerializerProvider provider)
+            throws IOException {
+        return; // does nothing, but still there for consistency
+    }
+
+    /** Method invoked after writing the RequestType, and used to write any additional values required */
+    private void serializeCharacterRequest(CharacterRequest value, JsonGenerator gen, SerializerProvider provider)
+            throws IOException {
+        // The idea here is: if ([GUARD]) {gen.write...} for all fields.
+
+        boolean hasTargetEntity =
+                value.type == RequestType.MeleeAttackRequest ||
+                        value.type == RequestType.RangedAttackRequest ||
+                        value.type == RequestType.ExchangeInfinityStoneRequest;
+
+        boolean hasStoneType =
+                value.type == RequestType.ExchangeInfinityStoneRequest ||
+                        value.type == RequestType.UseInfinityStoneRequest;
+
+        boolean hasValue =
+                value.type == RequestType.MeleeAttackRequest ||
+                        value.type == RequestType.RangedAttackRequest;
+
+
+        gen.writeObjectField("originEntity", value.originEntity);
+
+        if (hasTargetEntity) {
+            gen.writeObjectField("targetEntity", value.targetEntity);
+        }
+
+        gen.writeObjectField("originField", value.originField);
+        gen.writeObjectField("targetField", value.targetField);
+
+        if (hasStoneType) {
+            gen.writeObjectField("stoneType", new EntityID(EntityType.InfinityStones, value.stoneType.getID()));
+        }
+
+        if (hasValue) {
+            gen.writeObjectField("value", value.value);
+        }
+    }
+}

src/main/java/uulm/teamname/marvelous/gamelibrary/requests/Request.java

@@ -7,11 +7,13 @@ import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
 import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import uulm.teamname.marvelous.gamelibrary.json.basic.EventMessage;
 import uulm.teamname.marvelous.gamelibrary.json.ingame.RequestDeserializer;
+import uulm.teamname.marvelous.gamelibrary.json.ingame.RequestSerializer;
 
 import java.util.Objects;
 
 /** Represents an abstract request sent inside a {@link EventMessage} between client and server. */
 @JsonDeserialize(using = RequestDeserializer.class)
+@JsonSerialize(using = RequestSerializer.class)
 public abstract class Request {
 
     @JsonProperty("requestType") public RequestType type;