jellyfin/Emby.Naming/Video/StackResolver.cs
2020-03-25 14:33:44 -06:00

212 lines
7.8 KiB
C#

#pragma warning disable CS1591
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
using Emby.Naming.Common;
using MediaBrowser.Model.IO;
namespace Emby.Naming.Video
{
public class StackResolver
{
private readonly NamingOptions _options;
public StackResolver(NamingOptions options)
{
_options = options;
}
public IEnumerable<FileStack> ResolveDirectories(IEnumerable<string> files)
{
return Resolve(files.Select(i => new FileSystemMetadata { FullName = i, IsDirectory = true }));
}
public IEnumerable<FileStack> ResolveFiles(IEnumerable<string> files)
{
return Resolve(files.Select(i => new FileSystemMetadata { FullName = i, IsDirectory = false }));
}
public IEnumerable<FileStack> ResolveAudioBooks(IEnumerable<FileSystemMetadata> files)
{
var groupedDirectoryFiles = files.GroupBy(file =>
file.IsDirectory
? file.FullName
: Path.GetDirectoryName(file.FullName));
foreach (var directory in groupedDirectoryFiles)
{
var stack = new FileStack { Name = Path.GetFileName(directory.Key), IsDirectoryStack = false };
foreach (var file in directory)
{
if (file.IsDirectory)
{
continue;
}
stack.Files.Add(file.FullName);
}
yield return stack;
}
}
public IEnumerable<FileStack> Resolve(IEnumerable<FileSystemMetadata> files)
{
var resolver = new VideoResolver(_options);
var list = files
.Where(i => i.IsDirectory || resolver.IsVideoFile(i.FullName) || resolver.IsStubFile(i.FullName))
.OrderBy(i => i.FullName)
.ToList();
var expressions = _options.VideoFileStackingRegexes;
for (var i = 0; i < list.Count; i++)
{
var offset = 0;
var file1 = list[i];
var expressionIndex = 0;
while (expressionIndex < expressions.Length)
{
var exp = expressions[expressionIndex];
var stack = new FileStack();
// (Title)(Volume)(Ignore)(Extension)
var match1 = FindMatch(file1, exp, offset);
if (match1.Success)
{
var title1 = match1.Groups[1].Value;
var volume1 = match1.Groups[2].Value;
var ignore1 = match1.Groups[3].Value;
var extension1 = match1.Groups[4].Value;
var j = i + 1;
while (j < list.Count)
{
var file2 = list[j];
if (file1.IsDirectory != file2.IsDirectory)
{
j++;
continue;
}
// (Title)(Volume)(Ignore)(Extension)
var match2 = FindMatch(file2, exp, offset);
if (match2.Success)
{
var title2 = match2.Groups[1].Value;
var volume2 = match2.Groups[2].Value;
var ignore2 = match2.Groups[3].Value;
var extension2 = match2.Groups[4].Value;
if (string.Equals(title1, title2, StringComparison.OrdinalIgnoreCase))
{
if (!string.Equals(volume1, volume2, StringComparison.OrdinalIgnoreCase))
{
if (string.Equals(ignore1, ignore2, StringComparison.OrdinalIgnoreCase)
&& string.Equals(extension1, extension2, StringComparison.OrdinalIgnoreCase))
{
if (stack.Files.Count == 0)
{
stack.Name = title1 + ignore1;
stack.IsDirectoryStack = file1.IsDirectory;
stack.Files.Add(file1.FullName);
}
stack.Files.Add(file2.FullName);
}
else
{
// Sequel
offset = 0;
expressionIndex++;
break;
}
}
else if (!string.Equals(ignore1, ignore2, StringComparison.OrdinalIgnoreCase))
{
// False positive, try again with offset
offset = match1.Groups[3].Index;
break;
}
else
{
// Extension mismatch
offset = 0;
expressionIndex++;
break;
}
}
else
{
// Title mismatch
offset = 0;
expressionIndex++;
break;
}
}
else
{
// No match 2, next expression
offset = 0;
expressionIndex++;
break;
}
j++;
}
if (j == list.Count)
{
expressionIndex = expressions.Length;
}
}
else
{
// No match 1
offset = 0;
expressionIndex++;
}
if (stack.Files.Count > 1)
{
yield return stack;
i += stack.Files.Count - 1;
break;
}
}
}
}
private static string GetRegexInput(FileSystemMetadata file)
{
// For directories, dummy up an extension otherwise the expressions will fail
var input = !file.IsDirectory
? file.FullName
: file.FullName + ".mkv";
return Path.GetFileName(input);
}
private static Match FindMatch(FileSystemMetadata input, Regex regex, int offset)
{
var regexInput = GetRegexInput(input);
if (offset < 0 || offset >= regexInput.Length)
{
return Match.Empty;
}
return regex.Match(regexInput, offset);
}
}
}