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package net.jangaroo.apprunner.util;

import com.fasterxml.jackson.databind.ObjectMapper;

import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.List;
import java.util.Map;

public class AppDeSerializer {
  private static final String LOCALES_PROPERTY = "locales";
  private static final List DEFAULT_LOCALES = Collections.singletonList("en");

  public static List readLocales(InputStream appJsonSource) throws IOException {
    //noinspection unchecked
    Map map = new ObjectMapper().readValue(appJsonSource, Map.class);
    if (map.containsKey(LOCALES_PROPERTY)) {
      //noinspection unchecked
      return (List) map.get(LOCALES_PROPERTY);
    }
    return DEFAULT_LOCALES;
  }
}