//
// DotNetNuke - http://www.dotnetnuke.com
// Copyright (c) 2002-2005
// by Perpetual Motion Interactive Systems Inc. ( http://www.perpetualmotion.ca )
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated 
// documentation files (the "Software"), to deal in the Software without restriction, including without limitation 
// the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and 
// to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions 
// of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF 
// CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.
//

using System;
using System.Data;
using DotNetNuke;

namespace DotNetNuke.Modules.Survey
{
    public abstract class DataProvider
    {
        // singleton reference to the instantiated object 
        private static DataProvider objProvider = null;

        //  constructor
        static DataProvider()
        {
            CreateProvider();
        }

        // dynamically create provider
        private static void CreateProvider()
        {
            objProvider = ((DataProvider)(Framework.Reflection.CreateObject("data", "DotNetNuke.Modules.Survey", "")));
        }

        // return the provider
        public static DataProvider Instance()
        {
            return objProvider;
        }

        // all core methods defined below
        public abstract IDataReader GetSurveys(int ModuleId);
        public abstract IDataReader GetSurvey(int SurveyID, int ModuleId);
        public abstract int AddSurvey(int ModuleId, string Question, int ViewOrder, string OptionType, int UserId);
        public abstract void UpdateSurvey(int SurveyId, string Question, int ViewOrder, string OptionType, int UserId, int ModuleId);
        public abstract void DeleteSurvey(int SurveyID, int ModuleId);
        public abstract IDataReader GetSurveyOptions(int SurveyId);
        public abstract int AddSurveyOption(int SurveyId, string OptionName, int ViewOrder, bool IsCorrect);
        public abstract void UpdateSurveyOption(int SurveyOptionId, string OptionName, int ViewOrder, bool IsCorrect);
        public abstract void DeleteSurveyOption(int SurveyOptionID);
        public abstract void AddSurveyResult(int SurveyOptionId, int UserId);
    }
}