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using System;
using System.IO;
using System.Linq;
using Emby.Naming.Common;
namespace Emby.Naming.Video
{
/// <summary>
/// Resolves <see cref="VideoFileInfo"/> from file path.
/// </summary>
public class VideoResolver
{
private readonly NamingOptions _options;
/// <summary>
/// Initializes a new instance of the <see cref="VideoResolver"/> class.
/// </summary>
/// <param name="options"><see cref="NamingOptions"/> object containing VideoFileExtensions, StubFileExtensions, CleanStringRegexes and CleanDateTimeRegexes
/// and passes options in <see cref="StubResolver"/>, <see cref="FlagParser"/>, <see cref="Format3DParser"/> and <see cref="ExtraResolver"/>.</param>
public VideoResolver(NamingOptions options)
{
_options = options;
}
/// <summary>
/// Resolves the directory.
/// </summary>
/// <param name="path">The path.</param>
/// <returns>VideoFileInfo.</returns>
public VideoFileInfo? ResolveDirectory(string? path)
{
return Resolve(path, true);
}
/// <summary>
/// Resolves the file.
/// </summary>
/// <param name="path">The path.</param>
/// <returns>VideoFileInfo.</returns>
public VideoFileInfo? ResolveFile(string? path)
{
return Resolve(path, false);
}
/// <summary>
/// Resolves the specified path.
/// </summary>
/// <param name="path">The path.</param>
/// <param name="isDirectory">if set to <c>true</c> [is folder].</param>
/// <param name="parseName">Whether or not the name should be parsed for info.</param>
/// <returns>VideoFileInfo.</returns>
/// <exception cref="ArgumentNullException"><c>path</c> is <c>null</c>.</exception>
public VideoFileInfo? Resolve(string? path, bool isDirectory, bool parseName = true)
{
if (string.IsNullOrEmpty(path))
{
return null;
}
bool isStub = false;
string? container = null;
string? stubType = null;
if (!isDirectory)
{
var extension = Path.GetExtension(path);
// Check supported extensions
if (!_options.VideoFileExtensions.Contains(extension, StringComparer.OrdinalIgnoreCase))
{
// It's not supported. Check stub extensions
if (!StubResolver.TryResolveFile(path, _options, out stubType))
{
return null;
}
isStub = true;
}
container = extension.TrimStart('.');
}
var flags = new FlagParser(_options).GetFlags(path);
var format3DResult = new Format3DParser(_options).Parse(flags);
var extraResult = new ExtraResolver(_options).GetExtraInfo(path);
var name = isDirectory
? Path.GetFileName(path)
: Path.GetFileNameWithoutExtension(path);
int? year = null;
if (parseName)
{
var cleanDateTimeResult = CleanDateTime(name);
name = cleanDateTimeResult.Name;
year = cleanDateTimeResult.Year;
if (extraResult.ExtraType == null
&& TryCleanString(name, out ReadOnlySpan<char> newName))
{
name = newName.ToString();
}
}
return new VideoFileInfo(
path: path,
container: container,
isStub: isStub,
name: name,
year: year,
stubType: stubType,
is3D: format3DResult.Is3D,
format3D: format3DResult.Format3D,
extraType: extraResult.ExtraType,
isDirectory: isDirectory,
extraRule: extraResult.Rule);
}
/// <summary>
/// Determines if path is video file based on extension.
/// </summary>
/// <param name="path">Path to file.</param>
/// <returns>True if is video file.</returns>
public bool IsVideoFile(string path)
{
var extension = Path.GetExtension(path) ?? string.Empty;
return _options.VideoFileExtensions.Contains(extension, StringComparer.OrdinalIgnoreCase);
}
/// <summary>
/// Determines if path is video file stub based on extension.
/// </summary>
/// <param name="path">Path to file.</param>
/// <returns>True if is video file stub.</returns>
public bool IsStubFile(string path)
{
var extension = Path.GetExtension(path) ?? string.Empty;
return _options.StubFileExtensions.Contains(extension, StringComparer.OrdinalIgnoreCase);
}
/// <summary>
/// Tries to clean name of clutter.
/// </summary>
/// <param name="name">Raw name.</param>
/// <param name="newName">Clean name.</param>
/// <returns>True if cleaning of name was successful.</returns>
public bool TryCleanString(string name, out ReadOnlySpan<char> newName)
{
return CleanStringParser.TryClean(name, _options.CleanStringRegexes, out newName);
}
/// <summary>
/// Tries to get name and year from raw name.
/// </summary>
/// <param name="name">Raw name.</param>
/// <returns>Returns <see cref="CleanDateTimeResult"/> with name and optional year.</returns>
public CleanDateTimeResult CleanDateTime(string name)
{
return CleanDateTimeParser.Clean(name, _options.CleanDateTimeRegexes);
}
}
}
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