feat(#212): query, variables and responses as resources for tabs

Author: BlasiusSecundus

playground-spring-boot-autoconfigure/src/main/java/com/oembedler/moon/playground/boot/PlaygroundTab.java

@@ -1,6 +1,8 @@
 package com.oembedler.moon.playground.boot;
 
+import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import lombok.Data;
+import org.springframework.core.io.Resource;
 
 import java.util.List;
 import java.util.Map;
@@ -14,24 +16,27 @@ public class PlaygroundTab {
     private String endpoint;
 
     /**
-     * The GraphQL query (operation) to be initially displayed on the tab.
+     * The GraphQL query (operation) to be initially displayed on the tab. It should be a graphql resource.
      */
-    private String query;
+    @JsonSerialize(using = ResourceSerializer.class)
+    private Resource query;
 
     /**
      * The name of the tab.
      */
     private String name;
 
     /**
-     * The query variables. It should be a serialized JSON.
+     * The query variables. It should be a JSON resource.
      */
-    private String variables;
+    @JsonSerialize(using = ResourceSerializer.class)
+    private Resource variables;
 
     /**
-     * The list of responses to be displayed under "responses". Should be a list of serialized JSONs.
+     * The list of responses to be displayed under "responses". It should be a list of JSON resources.
      */
-    private List<String> responses;
+    @JsonSerialize(contentUsing = ResourceSerializer.class)
+    private List<Resource> responses;
 
     /**
      * HTTP headers. Key-value pairs expected.

playground-spring-boot-autoconfigure/src/main/java/com/oembedler/moon/playground/boot/ResourceSerializer.java

@@ -0,0 +1,21 @@
+package com.oembedler.moon.playground.boot;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import org.apache.tomcat.util.http.fileupload.util.Streams;
+import org.springframework.boot.jackson.JsonComponent;
+import org.springframework.core.io.Resource;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+
+@JsonComponent
+public class ResourceSerializer extends JsonSerializer<Resource> {
+    @Override
+    public void serialize(final Resource value, final JsonGenerator gen, final SerializerProvider serializers)
+            throws IOException {
+        final String content = Streams.asString(value.getInputStream(), StandardCharsets.UTF_8.name());
+        gen.writeString(content);
+    }
+}