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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Text.RegularExpressions;
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using NLog;
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using NzbDrone.Core.Model;
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using NzbDrone.Core.Repository.Quality;
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namespace NzbDrone.Core
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{
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public static class Parser
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{
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private static readonly Logger Logger = LogManager.GetCurrentClassLogger();
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private static readonly Regex[] ReportTitleRegex = new[]
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{
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new Regex(@"^(?<title>.+?)?\W*(?<airyear>\d{4})\W+(?<airmonth>\d{2})\W+(?<airday>\d{2})\W?(?!\\)",
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RegexOptions.IgnoreCase | RegexOptions.Compiled),
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new Regex(@"^(?<title>.*?)?(?:\W?S?(?<season>\d{1,2}(?!\d+))(?:(?:\-|\.|[ex]|\s|\sto\s){1,2}(?<episode>\d{1,2}(?!\d+)))+)+\W?(?!\\)",
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RegexOptions.IgnoreCase | RegexOptions.Compiled),
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new Regex(@"^(?<title>.+?)?\W?(?:\W(?<season>\d+)(?<episode>\d{2}))+\W?(?!\\)",
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RegexOptions.IgnoreCase | RegexOptions.Compiled), //Supports 103/113 naming
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new Regex(@"^(?<title>.*?)?(?:\W?S?(?<season>\d{1,2}(?!\d+))(?:(?:\-|\.|[ex]|\s|to)+(?<episode>\d+))+)+\W?(?!\\)",
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RegexOptions.IgnoreCase | RegexOptions.Compiled),
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new Regex(@"^(?<title>.*?)\W(?:S|Season\W?)?(?<season>\d{1,2}(?!\d+))+\W?(?!\\)",
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RegexOptions.IgnoreCase | RegexOptions.Compiled) //Supports Season only releases
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};
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private static readonly Regex[] SeasonReportTitleRegex = new[]
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{
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new Regex(
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@"(?<title>.+?)?\W?(?<year>\d{4}?)?\W(?:S|Season)?\W?(?<season>\d+)(?!\\)",
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RegexOptions.IgnoreCase |
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RegexOptions.Compiled),
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};
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private static readonly Regex NormalizeRegex = new Regex(@"((^|\W)(a|an|the|and|or|of)($|\W))|\W|\b(?!(?:19\d{2}|20\d{2}))\d+\b",
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RegexOptions.IgnoreCase | RegexOptions.Compiled);
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/// <summary>
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/// Parses a post title into list of episodes it contains
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/// </summary>
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/// <param name = "title">Title of the report</param>
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/// <returns>List of episodes contained to the post</returns>
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internal static EpisodeParseResult ParseEpisodeInfo(string title)
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{
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Logger.Trace("Parsing string '{0}'", title);
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foreach (var regex in ReportTitleRegex)
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{
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var simpleTitle = Regex.Replace(title, @"480[i|p]|720[i|p]|1080[i|p]|[x|h]264", String.Empty, RegexOptions.IgnoreCase | RegexOptions.Compiled);
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var match = regex.Matches(simpleTitle);
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if (match.Count != 0)
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{
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var seriesName = NormalizeTitle(match[0].Groups["title"].Value);
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var airyear = 0;
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Int32.TryParse(match[0].Groups["airyear"].Value, out airyear);
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EpisodeParseResult parsedEpisode;
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if (airyear < 1)
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{
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var season = 0;
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Int32.TryParse(match[0].Groups["season"].Value, out season);
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parsedEpisode = new EpisodeParseResult
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{
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Proper = title.ToLower().Contains("proper"),
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CleanTitle = seriesName,
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SeasonNumber = season,
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Episodes = new List<int>()
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};
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foreach (Match matchGroup in match)
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{
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var count = matchGroup.Groups["episode"].Captures.Count;
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//Allows use to return a list of 0 episodes (We can handle that as a full season release)
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if (count > 0)
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{
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var first = Convert.ToInt32(matchGroup.Groups["episode"].Captures[0].Value);
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var last = Convert.ToInt32(matchGroup.Groups["episode"].Captures[count - 1].Value);
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for (int i = first; i <= last; i++)
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{
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parsedEpisode.Episodes.Add(i);
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}
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}
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}
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}
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else
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{
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//Try to Parse as a daily show
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if (airyear > 0)
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{
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var airmonth = Convert.ToInt32(match[0].Groups["airmonth"].Value);
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var airday = Convert.ToInt32(match[0].Groups["airday"].Value);
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parsedEpisode = new EpisodeParseResult
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{
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Proper = title.ToLower().Contains("proper"),
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CleanTitle = seriesName,
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AirDate = new DateTime(airyear, airmonth, airday)
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};
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}
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//Something went wrong with this one... return null
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else
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return null;
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}
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parsedEpisode.Quality = ParseQuality(title);
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Logger.Trace("Episode Parsed. {0}", parsedEpisode);
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return parsedEpisode;
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}
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}
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Logger.Debug("Unable to parse text into episode info. {0}", title);
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return null;
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}
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/// <summary>
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/// Parses a post title into season it contains
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/// </summary>
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/// <param name = "title">Title of the report</param>
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/// <returns>Season information contained in the post</returns>
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internal static SeasonParseResult ParseSeasonInfo(string title)
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{
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Logger.Trace("Parsing string '{0}'", title);
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foreach (var regex in ReportTitleRegex)
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{
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var match = regex.Matches(title);
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if (match.Count != 0)
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{
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var seriesName = NormalizeTitle(match[0].Groups["title"].Value);
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int year;
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Int32.TryParse(match[0].Groups["year"].Value, out year);
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if (year < 1900 || year > DateTime.Now.Year + 1)
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{
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year = 0;
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}
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var seasonNumber = Convert.ToInt32(match[0].Groups["season"].Value);
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var result = new SeasonParseResult
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{
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SeriesTitle = seriesName,
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SeasonNumber = seasonNumber,
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Year = year,
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Quality = ParseQuality(title)
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};
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Logger.Trace("Season Parsed. {0}", result);
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return result;
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}
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}
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return null; //Return null
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}
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/// <summary>
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/// Parses a post title to find the series that relates to it
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/// </summary>
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/// <param name = "title">Title of the report</param>
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/// <returns>Normalized Series Name</returns>
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internal static string ParseSeriesName(string title)
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{
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Logger.Trace("Parsing string '{0}'", title);
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foreach (var regex in ReportTitleRegex)
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{
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var match = regex.Matches(title);
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if (match.Count != 0)
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{
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var seriesName = NormalizeTitle(match[0].Groups["title"].Value);
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Logger.Trace("Series Parsed. {0}", seriesName);
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return seriesName;
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}
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}
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return String.Empty;
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}
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/// <summary>
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/// Parses proper status out of a report title
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/// </summary>
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/// <param name = "title">Title of the report</param>
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/// <returns></returns>
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internal static bool ParseProper(string title)
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{
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return title.ToLower().Contains("proper");
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}
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internal static QualityTypes ParseQuality(string name)
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{
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Logger.Trace("Trying to parse quality for {0}", name);
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var result = QualityTypes.Unknown;
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name = name.ToLowerInvariant();
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if (name.Contains("dvd"))
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return QualityTypes.DVD;
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if (name.Contains("bdrip") || name.Contains("brrip"))
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{
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return QualityTypes.BDRip;
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}
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if (name.Contains("xvid") || name.Contains("divx"))
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{
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if (name.Contains("bluray"))
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{
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return QualityTypes.BDRip;
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}
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return QualityTypes.TV;
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}
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if (name.Contains("bluray"))
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{
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if (name.Contains("720p"))
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return QualityTypes.Bluray720;
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if (name.Contains("1080p"))
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return QualityTypes.Bluray1080;
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return QualityTypes.Bluray720;
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}
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if (name.Contains("web-dl"))
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return QualityTypes.WEBDL;
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if (name.Contains("x264") || name.Contains("h264") || name.Contains("720p"))
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return QualityTypes.HDTV;
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//Based on extension
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if (result == QualityTypes.Unknown && Path.HasExtension(name))
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{
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switch (Path.GetExtension(name).ToLower())
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{
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case ".avi":
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case ".xvid":
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case ".wmv":
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{
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result = QualityTypes.TV;
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break;
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}
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case ".mkv":
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{
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result = QualityTypes.HDTV;
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break;
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}
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}
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}
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Logger.Trace("Quality Parsed:{0} Title:", result, name);
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return result;
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}
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/// <summary>
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/// Normalizes the title. removing all non-word characters as well as common tokens
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/// such as 'the' and 'and'
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/// </summary>
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/// <param name = "title">title</param>
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/// <returns></returns>
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public static string NormalizeTitle(string title)
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{
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return NormalizeRegex.Replace(title, String.Empty).ToLower();
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}
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public static string NormalizePath(string path)
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{
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if (String.IsNullOrWhiteSpace(path))
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throw new ArgumentException("Path can not be null or empty");
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var info = new FileInfo(path);
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if (info.FullName.StartsWith(@"\\")) //UNC
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{
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return info.FullName.TrimEnd('/', '\\', ' ');
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}
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return info.FullName.Trim('/', '\\', ' ');
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}
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}
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}
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