package analyzer;

import com.google.gson.*;

import java.lang.reflect.Type;

import java.util.Map;

import java.util.TreeMap;

/**

* Serializer to convert the analyzer output to JSON.

*

* @see <a href="https://exercism.org/docs/building/tooling/analyzers/interface">The analyzer interface in the Exercism documentation</a>

*/

class OutputSerializer {

private static final Gson GSON = new GsonBuilder()

.registerTypeAdapter(Comment.class, new CommentJsonSerializer())

.setPrettyPrinting()

.create();

static String serialize(Output.Analysis analysis) {

return GSON.toJson(analysis);

}

static String serialize(Output.Tags tags) {

return GSON.toJson(tags);

}

private static class CommentJsonSerializer implements JsonSerializer<Comment> {

@Override

public JsonElement serialize(Comment comment, Type type, JsonSerializationContext jsonSerializationContext) {

var json = new JsonObject();

json.addProperty("comment", comment.getKey());

json.add("params", serializeParameters(comment.getParameters()));

if (comment.getType() != null) {

json.addProperty("type", comment.getType().name().toLowerCase());

}

return json;

}

private static JsonElement serializeParameters(Map<String, String> parameters) {

var json = new JsonObject();

new TreeMap<>(parameters).forEach(json::addProperty);

return json;

}

}

}