package com.novelbook.android.utils;


import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
import java.util.List;

public class HistoryCache {
    public HistoryCache() {
    }

    public static void clear(Context context) {
        SharedPreferences sp = context.getSharedPreferences("record", 0);
        sp.edit().clear().commit();
    }

    public static void saveHistory(Context context, String result) {
        SharedPreferences sp = context.getSharedPreferences("record", 0);
        Editor editor = sp.edit();
        editor.putString("record_key", result);
        editor.commit();
    }

    public static String getHistory(Context context) {
        SharedPreferences sp = context.getSharedPreferences("record", 0);
        String result = sp.getString("record_key", (String)null);
        return result;
    }

    public static List<String> toArray(Context context) {
        String history = getHistory(context);
        Gson gson = new Gson();
        List<String> retList = (List)gson.fromJson(history, (new TypeToken<List<String>>() {
        }).getType());
        if(retList!=null && retList.size()>9){
            return retList.subList(0,9);
        }
        return retList;
    }

    public static String toJsonArray(List<String> historyList) {
        Gson gson = new Gson();
        return gson.toJson(historyList);
    }
}