// 
// Copyright (c) 2004-2016 Jaroslaw Kowalski <jaak@jkowalski.net>, Kim Christensen, Julian Verdurmen
// 
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without 
// modification, are permitted provided that the following conditions 
// are met:
// 
// * Redistributions of source code must retain the above copyright notice, 
//   this list of conditions and the following disclaimer. 
// 
// * Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution. 
// 
// * Neither the name of Jaroslaw Kowalski nor the names of its 
//   contributors may be used to endorse or promote products derived from this
//   software without specific prior written permission. 
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 
// THE POSSIBILITY OF SUCH DAMAGE.
// 

namespace NLog.Filters
{
    using System;
    using System.ComponentModel;
    using NLog.Config;

    /// <summary>
    /// Matches when the calculated layout does NOT contain the specified substring.
    /// This filter is deprecated in favor of <c>&lt;when /&gt;</c> which is based on <a href="conditions.html">conditions</a>.
    /// </summary>
    [Filter("whenNotContains")]
    public class WhenNotContainsFilter : LayoutBasedFilter
    {
        /// <summary>
        /// Gets or sets the substring to be matched.
        /// </summary>
        /// <docgen category='Filtering Options' order='10' />
        [RequiredParameter]
        public string Substring { get; set; }

        /// <summary>
        /// Gets or sets a value indicating whether to ignore case when comparing strings.
        /// </summary>
        /// <docgen category='Filtering Options' order='10' />
        [DefaultValue(false)]
        public bool IgnoreCase { get; set; }

        /// <summary>
        /// Checks whether log event should be logged or not.
        /// </summary>
        /// <param name="logEvent">Log event.</param>
        /// <returns>
        /// <see cref="FilterResult.Ignore"/> - if the log event should be ignored<br/>
        /// <see cref="FilterResult.Neutral"/> - if the filter doesn't want to decide<br/>
        /// <see cref="FilterResult.Log"/> - if the log event should be logged<br/>
        /// .</returns>
        protected override FilterResult Check(LogEventInfo logEvent)
        {
            StringComparison comparison = this.IgnoreCase
                                              ? StringComparison.OrdinalIgnoreCase
                                              : StringComparison.Ordinal;
            string result = this.Layout.Render(logEvent);

            if (result.IndexOf(this.Substring, comparison) < 0)
            {
                return this.Action;
            }

            return FilterResult.Neutral;
        }
    }
}
