ktsu.io.StrongPaths 1.1.1

StrongPaths

A library that provides strong typing for common filesystem paths providing compile time feedback and runtime validation.

StrongPaths is a collection of classes derived from ktsu.io.StrongStrings with added functionality and helper methods for filesystem paths.

Get familiar with the StrongStrings library to get the most out of StrongPaths.

Usage

using ktsu.io.StrongPaths;

public class MyDemoClass
{
	public AbsoluteDirectoryPath OutputDir { get; set; } = (AbsoluteDirectoryPath)@"c:\output";

	public void SaveData(RelativeDirectoryPath subDir, FileName fileName)
	{
		// You can use the / operator to combine paths
		AbsoluteFilePath filePath = OutputDir / subDir / fileName;
		File.WriteAllText(filePath, "Hello, world!");

		// An AbsoluteDirectoryPath combined with a RelativeDirectoryPath returns an AbsoluteDirectoryPath
		AbsoluteDirectoryPath newOutputDir = OutputDir / subDir;

		// An AbsoluteDirectoryPath combined with a FileName returns an AbsoluteFilePath
		AbsoluteFilePath newFilePath = newOutputDir / fileName;

		// You can get a relative path from Absolute/Relative Directory/File paths using the RelativeTo method
		RelativeDirectoryPath relativePath = newOutputDir.RelativeTo(OutputDir);
		RelativeFilePath relativeFilePath = newFilePath.RelativeTo(OutputDir);
		RelativeDirectoryPath relativePath2 = newOutputDir.RelativeTo(filePath);
		RelativeFilePath relativeFilePath2 = newFilePath.RelativeTo(filePath);
	}

	public void Demo()
	{
		string storeLocation = "melbourne";
		RelativeDirectoryPath storeDir = (RelativeDirectoryPath)$"store_{storeLocation}";
		FileName fileName = (FileName)$"{DateTime.UtcNow}.json";
		SaveData(storeDir, fileName);
	}
}

Concrete Types

• AbsolutePath
• RelativePath
• DirectoryPath
• FilePath
• FileName
• FileExtension
• AbsoluteDirectoryPath
• RelativeDirectoryPath
• AbsoluteFilePath
• RelativeFilePath

Abstract Base Classes

You can use these abstract base classes to accept a subset of path types in your method parameters:

• AnyStrongPath Accepts any of the concrete types and types derived from them
• AnyRelativePath Accepts RelativePath, RelativeDirectroryPath, RelativeFilePath, and types derived from them
• AnyAbsolutePath Accepts AbsolutePath, AbsoluteDirectroryPath, AbsoluteFilePath, and types derived from them
• AnyDirectoryPath Accepts DirectoryPath, AbsoluteDirectroryPath, RelativeDirectroryPath, and types derived from them
• AnyFilePath Accepts FilePath, AbsoluteFilePath, RelativeFilePath, and types derived from them

using ktsu.io.StrongPaths;

public static class MyDemoClass
{
	public static void SaveData(AnyDirectoryPath outputDir, FileName fileName)
	{
		// You can't use the / operator with the abstract base classes because it has no way of knowing which type to return
		// You have to use the Path.Combine method when using the abstract base classes
		FilePath filePath = (FilePath)Path.Combine(outputDir, fileName);
		File.WriteAllText(filePath, "Hello, World!");
	}

    public static void Demo()
	{
		string storeLocation = "melbourne";
		RelativeDirectoryPath storeDir = (RelativeDirectoryPath)$"store_{storeLocation}";
		FileName fileName = (FileName)$"{DateTime.UtcNow}.json";
		SaveData(storeDir, fileName);
	}
}