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using System;
using System.Globalization;
using System.IO;
using System.Linq;
using Emby.Naming.Common;
namespace Emby.Naming.TV
{
public class SeasonPathParser
{
private readonly NamingOptions _options;
public SeasonPathParser(NamingOptions options)
{
_options = options;
}
public SeasonPathParserResult Parse(string path, bool supportSpecialAliases, bool supportNumericSeasonFolders)
{
var result = new SeasonPathParserResult();
var seasonNumberInfo = GetSeasonNumberFromPath(path, supportSpecialAliases, supportNumericSeasonFolders);
result.SeasonNumber = seasonNumberInfo.Item1;
if (result.SeasonNumber.HasValue)
{
result.Success = true;
result.IsSeasonFolder = seasonNumberInfo.Item2;
}
return result;
}
/// <summary>
/// A season folder must contain one of these somewhere in the name
/// </summary>
private static readonly string[] SeasonFolderNames =
{
"season",
"sæson",
"temporada",
"saison",
"staffel",
"series",
"сезон",
"stagione"
};
/// <summary>
/// Gets the season number from path.
/// </summary>
/// <param name="path">The path.</param>
/// <param name="supportSpecialAliases">if set to <c>true</c> [support special aliases].</param>
/// <param name="supportNumericSeasonFolders">if set to <c>true</c> [support numeric season folders].</param>
/// <returns>System.Nullable{System.Int32}.</returns>
private Tuple<int?, bool> GetSeasonNumberFromPath(string path, bool supportSpecialAliases, bool supportNumericSeasonFolders)
{
var filename = Path.GetFileName(path);
if (supportSpecialAliases)
{
if (string.Equals(filename, "specials", StringComparison.OrdinalIgnoreCase))
{
return new Tuple<int?, bool>(0, true);
}
if (string.Equals(filename, "extras", StringComparison.OrdinalIgnoreCase))
{
return new Tuple<int?, bool>(0, true);
}
}
if (supportNumericSeasonFolders)
{
if (int.TryParse(filename, NumberStyles.Integer, CultureInfo.InvariantCulture, out var val))
{
return new Tuple<int?, bool>(val, true);
}
}
if (filename.StartsWith("s", StringComparison.OrdinalIgnoreCase))
{
var testFilename = filename.Substring(1);
if (int.TryParse(testFilename, NumberStyles.Integer, CultureInfo.InvariantCulture, out var val))
{
return new Tuple<int?, bool>(val, true);
}
}
// Look for one of the season folder names
foreach (var name in SeasonFolderNames)
{
var index = filename.IndexOf(name, StringComparison.OrdinalIgnoreCase);
if (index != -1)
{
var result = GetSeasonNumberFromPathSubstring(filename.Replace(name, " ", StringComparison.OrdinalIgnoreCase));
if (result.Item1.HasValue)
{
return result;
}
break;
}
}
var parts = filename.Split(new[] { '.', '_', ' ', '-' }, StringSplitOptions.RemoveEmptyEntries);
var resultNumber = parts.Select(GetSeasonNumberFromPart).FirstOrDefault(i => i.HasValue);
return new Tuple<int?, bool>(resultNumber, true);
}
private int? GetSeasonNumberFromPart(string part)
{
if (part.Length < 2 || !part.StartsWith("s", StringComparison.OrdinalIgnoreCase))
{
return null;
}
part = part.Substring(1);
if (int.TryParse(part, NumberStyles.Integer, CultureInfo.InvariantCulture, out var value))
{
return value;
}
return null;
}
/// <summary>
/// Extracts the season number from the second half of the Season folder name (everything after "Season", or "Staffel")
/// </summary>
/// <param name="path">The path.</param>
/// <returns>System.Nullable{System.Int32}.</returns>
private Tuple<int?, bool> GetSeasonNumberFromPathSubstring(string path)
{
var numericStart = -1;
var length = 0;
var hasOpenParenth = false;
var isSeasonFolder = true;
// Find out where the numbers start, and then keep going until they end
for (var i = 0; i < path.Length; i++)
{
if (char.IsNumber(path, i))
{
if (!hasOpenParenth)
{
if (numericStart == -1)
{
numericStart = i;
}
length++;
}
}
else if (numericStart != -1)
{
// There's other stuff after the season number, e.g. episode number
isSeasonFolder = false;
break;
}
var currentChar = path[i];
if (currentChar.Equals('('))
{
hasOpenParenth = true;
}
else if (currentChar.Equals(')'))
{
hasOpenParenth = false;
}
}
if (numericStart == -1)
{
return new Tuple<int?, bool>(null, isSeasonFolder);
}
return new Tuple<int?, bool>(int.Parse(path.Substring(numericStart, length), CultureInfo.InvariantCulture), isSeasonFolder);
}
}
}
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