Prowlarr/src/NzbDrone.Core/IndexerSearch/Definitions/SearchCriteriaBase.cs

using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using NzbDrone.Common.Extensions;

namespace NzbDrone.Core.IndexerSearch.Definitions
{
    public abstract class SearchCriteriaBase
    {
        private static readonly Regex SpecialCharacter = new Regex(@"[`'.]", RegexOptions.IgnoreCase | RegexOptions.Compiled);
        private static readonly Regex NonWord = new Regex(@"[\W]", RegexOptions.IgnoreCase | RegexOptions.Compiled);
        private static readonly Regex BeginningThe = new Regex(@"^the\s", RegexOptions.IgnoreCase | RegexOptions.Compiled);

        public virtual bool InteractiveSearch { get; set; }
        public List<int> IndexerIds { get; set; }
        public string SearchTerm { get; set; }
        public int[] Categories { get; set; }
        public string SearchType { get; set; }
        public int? Limit { get; set; }
        public int? Offset { get; set; }
        public string Source { get; set; }
        public string Host { get; set; }

        public virtual string SearchQuery
        {
            get
            {
                return $"Term: [{SearchTerm}]";
            }
        }

        public override string ToString()
        {
            return $"{SearchQuery}, Offset: {Offset ?? 0}, Limit: {Limit ?? 0}, Categories: [{string.Join(", ", Categories)}]";
        }

        public virtual bool RssSearch
        {
            get
            {
                if (SearchTerm.IsNullOrWhiteSpace())
                {
                    return true;
                }

                return false;
            }
        }

        public string SanitizedSearchTerm
        {
            get
            {
                var term = SearchTerm;
                if (SearchTerm == null)
                {
                    term = "";
                }

                var safeTitle = term.Where(c => (char.IsLetterOrDigit(c)
                                                 || char.IsWhiteSpace(c)
                                                 || c == '-'
                                                 || c == '.'
                                                 || c == '_'
                                                 || c == '('
                                                 || c == ')'
                                                 || c == '@'
                                                 || c == '/'
                                                 || c == '\''
                                                 || c == '['
                                                 || c == ']'
                                                 || c == '+'
                                                 || c == '%'));
                return string.Concat(safeTitle);
            }
        }
    }
}