Inceptum/src/main/java/io/gitlab/jfronny/inceptum/gson/RulesDeserializer.java

package io.gitlab.jfronny.inceptum.gson;

import com.google.gson.*;
import io.gitlab.jfronny.inceptum.model.mojang.Rules;
import io.gitlab.jfronny.inceptum.util.OSCheck;

import java.lang.reflect.Type;

public class RulesDeserializer implements JsonDeserializer<Rules> {
    @Override
    public Rules deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
        boolean valid = true;
        for (JsonElement rule : json.getAsJsonArray()) {
            JsonObject ro = rule.getAsJsonObject();
            String actionType = ro.get("action").getAsJsonPrimitive().getAsString();
            if (!actionType.equals("allow") && !actionType.equals("disallow")) {
                throw new JsonParseException("Unexpected action in argument: " + actionType);
            }
            boolean matched = true;
            if (ro.has("features")) { //TODO support has_custom_resolution
                matched = false;
            }
            if (ro.has("os")) {
                JsonObject osObject = ro.get("os").getAsJsonObject();
                if (osObject.has("name")) {
                    if (!OSCheck.OS.getMojName().equals(osObject.get("name").getAsString())) {
                        matched = false;
                    }
                }
                if (osObject.has("version")) {
                    if (!System.getProperty("os.version").matches(osObject.get("version").getAsString())) {
                        matched = false;
                    }
                }
            }
            if (actionType.equals("disallow")) matched = !matched;
            if (!matched) {
                valid = false;
                break;
            }
        }
        return new Rules(valid);
    }
}