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Rename methods and optimize allocations

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This commit is contained in:
David 2021-03-26 17:06:01 +01:00
parent 7685569480
commit 78f7fdeacc
4 changed files with 38 additions and 35 deletions
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4
Emby.Server.Implementations/Library/PathExtensions.cs
View File

@ -44,8 +44,8 @@ namespace Emby.Server.Implementations.Library
// for imdbid we also accept pattern matching
if (string.Equals(attribute, "imdbid", StringComparison.OrdinalIgnoreCase))
{
var match = ProviderIdParsers.TryParseImdbId(str, out var imdbId);
return match ? imdbId : null;
var match = ProviderIdParsers.TryFindImdbId(str, out var imdbId);
return match ? imdbId.ToString() : null;
}
return null;

34
MediaBrowser.Common/Providers/ProviderIdParsers.cs
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@ -12,6 +12,7 @@ namespace MediaBrowser.Common.Providers
{
private const int ImdbMinNumbers = 7;
private const int ImdbMaxNumbers = 8;
private const string ImdbPrefix = "tt";
/// <summary>
/// Parses an IMDb id from a string.
@ -19,9 +20,9 @@ namespace MediaBrowser.Common.Providers
/// <param name="text">The text to parse.</param>
/// <param name="imdbId">The parsed IMDb id.</param>
/// <returns>True if parsing was successful, false otherwise.</returns>
public static bool TryParseImdbId(ReadOnlySpan<char> text, [NotNullWhen(true)] out string? imdbId)
public static bool TryFindImdbId(ReadOnlySpan<char> text, [NotNullWhen(true)] out ReadOnlySpan<char> imdbId)
{
var tt = "tt".AsSpan();
var tt = ImdbPrefix.AsSpan();
// imdb id is at least 9 chars (tt + 7 numbers)
while (text.Length >= 2 + ImdbMinNumbers)
@ -33,9 +34,10 @@ namespace MediaBrowser.Common.Providers
return false;
}
text = text.Slice(ttPos + tt.Length);
var i = 0;
for (; i < Math.Min(text.Length, ImdbMaxNumbers); i++)
text = text.Slice(ttPos);
var i = 2;
var limit = Math.Min(text.Length, ImdbMaxNumbers + 2);
for (; i < limit; i++)
{
var c = text[i];
if (!IsDigit(c))
@ -44,10 +46,10 @@ namespace MediaBrowser.Common.Providers
}
}
// skip if more than 8 digits
if (i <= ImdbMaxNumbers && i >= ImdbMinNumbers)
// skip if more than 8 digits + 2 chars for tt
if (i <= ImdbMaxNumbers + 2 && i >= ImdbMinNumbers + 2)
{
imdbId = string.Concat(tt, text.Slice(0, i));
imdbId = text.Slice(0, i);
return true;
}
@ -64,8 +66,8 @@ namespace MediaBrowser.Common.Providers
/// <param name="text">The text with the url to parse.</param>
/// <param name="tmdbId">The parsed TMDb id.</param>
/// <returns>True if parsing was successful, false otherwise.</returns>
public static bool TryParseTmdbMovieId(ReadOnlySpan<char> text, [NotNullWhen(true)] out string? tmdbId)
=> TryParseProviderId(text, "themoviedb.org/movie/", out tmdbId);
public static bool TryFindTmdbMovieId(ReadOnlySpan<char> text, [NotNullWhen(true)] out ReadOnlySpan<char> tmdbId)
=> TryFindProviderId(text, "themoviedb.org/movie/", out tmdbId);
/// <summary>
/// Parses an TMDb id from a series url.
@ -73,8 +75,8 @@ namespace MediaBrowser.Common.Providers
/// <param name="text">The text with the url to parse.</param>
/// <param name="tmdbId">The parsed TMDb id.</param>
/// <returns>True if parsing was successful, false otherwise.</returns>
public static bool TryParseTmdbSeriesId(ReadOnlySpan<char> text, [NotNullWhen(true)] out string? tmdbId)
=> TryParseProviderId(text, "themoviedb.org/tv/", out tmdbId);
public static bool TryFindTmdbSeriesId(ReadOnlySpan<char> text, [NotNullWhen(true)] out ReadOnlySpan<char> tmdbId)
=> TryFindProviderId(text, "themoviedb.org/tv/", out tmdbId);
/// <summary>
/// Parses an TVDb id from a url.
@ -82,10 +84,10 @@ namespace MediaBrowser.Common.Providers
/// <param name="text">The text with the url to parse.</param>
/// <param name="tvdbId">The parsed TVDb id.</param>
/// <returns>True if parsing was successful, false otherwise.</returns>
public static bool TryParseTvdbId(ReadOnlySpan<char> text, [NotNullWhen(true)] out string? tvdbId)
=> TryParseProviderId(text, "thetvdb.com/?tab=series&id=", out tvdbId);
public static bool TryFindTvdbId(ReadOnlySpan<char> text, [NotNullWhen(true)] out ReadOnlySpan<char> tvdbId)
=> TryFindProviderId(text, "thetvdb.com/?tab=series&id=", out tvdbId);
private static bool TryParseProviderId(ReadOnlySpan<char> text, ReadOnlySpan<char> searchString, [NotNullWhen(true)] out string? providerId)
private static bool TryFindProviderId(ReadOnlySpan<char> text, ReadOnlySpan<char> searchString, [NotNullWhen(true)] out ReadOnlySpan<char> providerId)
{
var searchPos = text.IndexOf(searchString);
if (searchPos == -1)
@ -109,7 +111,7 @@ namespace MediaBrowser.Common.Providers
if (i >= 1)
{
providerId = text.Slice(0, i).ToString();
providerId = text.Slice(0, i);
return true;
}

16
MediaBrowser.XbmcMetadata/Parsers/BaseNfoParser.cs
View File

@ -219,29 +219,29 @@ namespace MediaBrowser.XbmcMetadata.Parsers
protected void ParseProviderLinks(T item, string xml)
{
if (ProviderIdParsers.TryParseImdbId(xml, out var imdbId))
if (ProviderIdParsers.TryFindImdbId(xml, out var imdbId))
{
item.SetProviderId(MetadataProvider.Imdb, imdbId);
item.SetProviderId(MetadataProvider.Imdb, imdbId.ToString());
}
if (item is Movie)
{
if (ProviderIdParsers.TryParseTmdbMovieId(xml, out var tmdbId))
if (ProviderIdParsers.TryFindTmdbMovieId(xml, out var tmdbId))
{
item.SetProviderId(MetadataProvider.Tmdb, tmdbId);
item.SetProviderId(MetadataProvider.Tmdb, tmdbId.ToString());
}
}
if (item is Series)
{
if (ProviderIdParsers.TryParseTmdbSeriesId(xml, out var tmdbId))
if (ProviderIdParsers.TryFindTmdbSeriesId(xml, out var tmdbId))
{
item.SetProviderId(MetadataProvider.Tmdb, tmdbId);
item.SetProviderId(MetadataProvider.Tmdb, tmdbId.ToString());
}
if (ProviderIdParsers.TryParseTvdbId(xml, out var tvdbId))
if (ProviderIdParsers.TryFindTvdbId(xml, out var tvdbId))
{
item.SetProviderId(MetadataProvider.Tvdb, tvdbId);
item.SetProviderId(MetadataProvider.Tvdb, tvdbId.ToString());
}
}
}

19
tests/Jellyfin.Common.Tests/Providers/ProviderIdParserTests.cs
View File

@ -1,4 +1,5 @@
using MediaBrowser.Common.Providers;
using System;
using MediaBrowser.Common.Providers;
using Xunit;
namespace Jellyfin.Common.Tests.Providers
@ -20,9 +21,9 @@ namespace Jellyfin.Common.Tests.Providers
[InlineData("tt123456789", true, "tt12345678")]
public void Parse_Imdb(string text, bool shouldSucceed, string? imdbId)
{
var succeeded = ProviderIdParsers.TryParseImdbId(text, out string? parsedId);
var succeeded = ProviderIdParsers.TryFindImdbId(text, out ReadOnlySpan<char> parsedId);
Assert.Equal(shouldSucceed, succeeded);
Assert.Equal(imdbId, parsedId);
Assert.Equal(imdbId ?? Span<char>.Empty.ToString(), parsedId.ToString());
}
[Theory]
@ -32,9 +33,9 @@ namespace Jellyfin.Common.Tests.Providers
[InlineData("https://www.themoviedb.org/tv/1668-friends", false, null)]
public void Parse_TmdbMovie(string text, bool shouldSucceed, string? tmdbId)
{
var succeeded = ProviderIdParsers.TryParseTmdbMovieId(text, out string? parsedId);
var succeeded = ProviderIdParsers.TryFindTmdbMovieId(text, out ReadOnlySpan<char> parsedId);
Assert.Equal(shouldSucceed, succeeded);
Assert.Equal(tmdbId, parsedId);
Assert.Equal(tmdbId ?? Span<char>.Empty.ToString(), parsedId.ToString());
}
[Theory]
@ -44,9 +45,9 @@ namespace Jellyfin.Common.Tests.Providers
[InlineData("https://www.themoviedb.org/movie/30287-fallo", false, null)]
public void Parse_TmdbSeries(string text, bool shouldSucceed, string? tmdbId)
{
var succeeded = ProviderIdParsers.TryParseTmdbSeriesId(text, out string? parsedId);
var succeeded = ProviderIdParsers.TryFindTmdbSeriesId(text, out ReadOnlySpan<char> parsedId);
Assert.Equal(shouldSucceed, succeeded);
Assert.Equal(tmdbId, parsedId);
Assert.Equal(tmdbId ?? Span<char>.Empty.ToString(), parsedId.ToString());
}
[Theory]
@ -56,9 +57,9 @@ namespace Jellyfin.Common.Tests.Providers
[InlineData("https://www.themoviedb.org/tv/1668-friends", false, null)]
public void Parse_Tvdb(string text, bool shouldSucceed, string? tvdbId)
{
var succeeded = ProviderIdParsers.TryParseTvdbId(text, out string? parsedId);
var succeeded = ProviderIdParsers.TryFindTvdbId(text, out ReadOnlySpan<char> parsedId);
Assert.Equal(shouldSucceed, succeeded);
Assert.Equal(tvdbId, parsedId);
Assert.Equal(tvdbId ?? Span<char>.Empty.ToString(), parsedId.ToString());
}
}
}