﻿/* Yet Another Forum.NET
 * Copyright (C) 2003-2005 Bjørnar Henden
 * Copyright (C) 2006-2013 Jaben Cargman
 * Copyright (C) 2014-2022 Ingo Herbote
 * https://www.yetanotherforum.net/
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at

 * https://www.apache.org/licenses/LICENSE-2.0

 * 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.
 */
namespace YAF.Types.Interfaces
{
    #region Using

    using System;

    #endregion

    /// <summary>
    /// The i read value extensions.
    /// </summary>
    public static class IReadValueExtensions
    {
        #region Public Methods

        /// <summary>
        /// Gets a value with a default value...
        /// </summary>
        /// <param name="readValue">
        /// </param>
        /// <param name="key">
        /// </param>
        /// <param name="getValue">
        /// </param>
        /// <typeparam name="T">
        /// </typeparam>
        /// <returns>
        /// </returns>
        public static T Get<T>([NotNull] this IReadValue<T> readValue, [NotNull] string key, [NotNull] Func<T> getValue)
        {
            CodeContracts.VerifyNotNull(readValue);
            CodeContracts.VerifyNotNull(key);
            CodeContracts.VerifyNotNull(getValue);

            var value = readValue.Get(key);

            return Equals(value, default(T)) ? getValue() : value;
        }

        /// <summary>
        /// Gets a value with a default value...
        /// </summary>
        /// <param name="readValue">
        /// </param>
        /// <param name="key">
        /// </param>
        /// <param name="defaultValue"></param>
        /// <typeparam name="T">
        /// </typeparam>
        /// <returns>
        /// </returns>
        public static T Get<T>([NotNull] this IReadValue<T> readValue, [NotNull] string key, [CanBeNull] T defaultValue)
        {
            CodeContracts.VerifyNotNull(readValue);
            CodeContracts.VerifyNotNull(key);

            var value = readValue.Get(key);

            return Equals(value, default(T)) ? defaultValue : value;
        }

        /// <summary>
        /// The get as bool.
        /// </summary>
        /// <param name="readValue">
        /// The read value.
        /// </param>
        /// <param name="key">
        /// The key.
        /// </param>
        /// <param name="defaultValue">
        /// The default value.
        /// </param>
        /// <returns>
        /// The get as bool.
        /// </returns>
        public static bool GetAsBool([NotNull] this IReadValue<string> readValue, [NotNull] string key, bool defaultValue)
        {
            CodeContracts.VerifyNotNull(readValue);
            CodeContracts.VerifyNotNull(key);

            var value = readValue.Get(key);

            return Equals(value, null) ? defaultValue : Convert.ToBoolean(value.ToLower());
        }

        #endregion
    }
}