diff options
Diffstat (limited to 'MediaBrowser.Controller/Entities/BaseItem.cs')
| -rw-r--r-- | MediaBrowser.Controller/Entities/BaseItem.cs | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/MediaBrowser.Controller/Entities/BaseItem.cs b/MediaBrowser.Controller/Entities/BaseItem.cs index 28f40cb7fa..d030c8f420 100644 --- a/MediaBrowser.Controller/Entities/BaseItem.cs +++ b/MediaBrowser.Controller/Entities/BaseItem.cs @@ -48,6 +48,10 @@ namespace MediaBrowser.Controller.Entities public const string ThemeSongFileName = "theme"; + // Well below the 255 byte limit of the common Linux filesystems and the 255 character limit + // of Windows, so the files inside the folder still fit within MAX_PATH. + private const int MaxItemByNameFolderNameBytes = 128; + /// <summary> /// The supported image extensions. /// </summary> @@ -942,6 +946,43 @@ namespace MediaBrowser.Controller.Entities } /// <summary> + /// Turns an item-by-name entity's name into a folder name every supported filesystem accepts. + /// </summary> + /// <param name="name">The entity's name.</param> + /// <returns>The folder name.</returns> + public static string GetItemByNameFolderName(string name) + { + // Trim the period at the end because windows will have a hard time with that + var validName = FileSystem.GetValidFilename(name).Trim().TrimEnd('.'); + + // Most Linux filesystems cap a path component at 255 bytes, so a name past that cannot be + // turned into a folder at all - and an entity with no folder can never be created, which + // leaves the credit behind it stuck: not refreshable, not deletable, retried on every scan. + // Only broken provider data gets this long, but it still has to resolve to something, so + // keep a readable prefix and let a hash of the whole name tell two of them apart. + if (Encoding.UTF8.GetByteCount(validName) <= MaxItemByNameFolderNameBytes) + { + return validName; + } + + var suffix = "-" + validName.GetMD5().ToString("N", CultureInfo.InvariantCulture); + var budget = MaxItemByNameFolderNameBytes - suffix.Length; + var length = Math.Min(validName.Length, budget); + while (length > 0 && Encoding.UTF8.GetByteCount(validName.AsSpan(0, length)) > budget) + { + length--; + } + + // Never cut a surrogate pair in half, the lone half is not a valid file name character. + if (length > 0 && char.IsHighSurrogate(validName[length - 1])) + { + length--; + } + + return string.Concat(validName.AsSpan(0, length).TrimEnd().TrimEnd('.'), suffix); + } + + /// <summary> /// Cleans a raw name into its sortable form by applying the configured sort rules. /// </summary> /// <param name="name">The raw name to clean.</param> |