Location/LocationHelper.cs

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/*
 * Author: Kishore Reddy
 * Url: http://commonlibrarynet.codeplex.com/
 * Title: CommonLibrary.NET
 * Copyright: � 2009 Kishore Reddy
 * License: LGPL License
 * LicenseUrl: http://commonlibrarynet.codeplex.com/license
 * Description: A C# based .NET 3.5 Open-Source collection of reusable components.
 * Usage: Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
using System;
using System.Collections.Generic;
using System.Text;
using System.Linq;

using ComLib;
using ComLib.Entities;
using ComLib.ValidationSupport;


namespace ComLib.LocationSupport
{
    /// <summary>
    /// This class contains various helper methods
    /// for the LocationSupport namespace.
    /// </summary>
    public class LocationHelper
    {
        /// <summary>
        /// Checks that the state belongs to the country.
        /// </summary>
        /// <param name="stateLookUp"></param>
        /// <param name="countryLookUp"></param>
        /// <param name="stateId"></param>
        /// <param name="countryId"></param>
        /// <returns></returns>
        public static bool IsValidStateCountryRelation(StateLookUp stateLookUp, CountryLookUp countryLookUp, int stateId, int countryId)
        {
            // indicates online.
            bool isUSA = countryId == LocationConstants.CountryId_USA;

            // If country id is online, disregard check.
            if (countryId == LocationConstants.CountryId_NA_Online) return true;

            // Do not have to select a state for Non-USA countries.
            if (stateId == LocationConstants.StateId_NA_Online && !isUSA) return true;

            // Must select a state for USA.
            if (stateId == LocationConstants.StateId_NA_Online && isUSA) return false;

            State state = stateLookUp[stateId];
            Country country = countryLookUp[countryId];

            // Check combination
            if (state.CountryId == country.Id) { return true; }