DocumentationPathResolver.cs

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using Microsoft.Extensions.Configuration;
using System.IO;
 
namespace DreamineWeb.Services;

public static class DocumentationPathResolver
{
    public static string? ResolveDoxygenRoot(IConfiguration configuration)
    {
        ArgumentNullException.ThrowIfNull(configuration);
 
        string? configuredPath = configuration["Documentation:DoxygenRoot"];
        if (!string.IsNullOrWhiteSpace(configuredPath))
        {
            string absolutePath = Path.GetFullPath(configuredPath);
            if (Directory.Exists(absolutePath))
                return absolutePath;
        }
 
        string packagedPath = Path.Combine(AppContext.BaseDirectory, "Doxygen");
        if (Directory.Exists(packagedPath))
            return packagedPath;
 
        return FindSolutionDocumentation(Directory.GetCurrentDirectory())
            ?? FindSolutionDocumentation(AppContext.BaseDirectory);
    }

    private static string? FindSolutionDocumentation(string startPath)
    {
        DirectoryInfo? directory = new(Path.GetFullPath(startPath));
        while (directory is not null)
        {
            string candidate = Path.Combine(directory.FullName, "10_DOCUMENTS", "Doxygen");
            if (Directory.Exists(candidate))
                return candidate;
 
            directory = directory.Parent;
        }
 
        return null;
    }
}