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Reduce apparent complexity of GetInfo

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This commit is contained in:
Matt Nadareski
2025-01-04 23:23:22 -05:00
parent bab894ea2c
commit 690693c1ad
1 changed files with 28 additions and 19 deletions
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47
SabreTools.FileTypes/FileTypeTool.cs
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@@ -49,25 +49,7 @@ namespace SabreTools.FileTypes
// Get input information
var fileType = GetFileType(input);
Stream inputStream = File.OpenRead(input);
// Try to match the supplied header skipper
if (header != null)
{
SkipperMatch.Init();
var rule = SkipperMatch.GetMatchingRule(input, Path.GetFileNameWithoutExtension(header));
// If there's a match, transform the stream before getting info
if (rule.Tests != null && rule.Tests.Length != 0)
{
// Create the output stream
MemoryStream outputStream = new();
// Transform the stream and get the information from it
rule.TransformStream(inputStream, outputStream, keepReadOpen: false, keepWriteOpen: true);
inputStream = outputStream;
}
}
Stream inputStream = GetInfoStream(input, header);
// Get the info in the proper manner
BaseFile? baseFile;
@@ -174,6 +156,33 @@ namespace SabreTools.FileTypes
return baseFile;
}
/// <summary>
/// Get the required stream for info hashing
/// </summary>
/// <param name="input">Filename to get information from</param>
/// <param name="header">Populated string representing the name of the skipper to use, a blank string to use the first available checker, null otherwise</param>
/// <returns>Open stream representing the file</returns>
private static Stream GetInfoStream(string input, string? header)
{
// Open the file directly
Stream inputStream = File.Open(input, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
if (header == null)
return inputStream;
// Try to match the supplied header skipper
SkipperMatch.Init();
var rule = SkipperMatch.GetMatchingRule(input, Path.GetFileNameWithoutExtension(header));
// If there's no match, return the original stream
if (rule.Tests == null || rule.Tests.Length == 0)
return inputStream;
// Transform the stream and get the information from it
var outputStream = new MemoryStream();
rule.TransformStream(inputStream, outputStream, keepReadOpen: false, keepWriteOpen: true);
return outputStream;
}
#endregion
#region File Type