A .NET Interactive Notebook that converts Netlify URL Redirects to Azure Static Web Apps staticwebapp.config.json format

netlify-to-azure-static-web-apps-redirects-converter.dib

#!csharp

using System.IO;
using System.Text;
using System.Text.RegularExpressions;

#!csharp

var lines = await File.ReadAllLinesAsync("./_redirects");
var rules = new List<(string, string, string)>();
foreach (string line in lines)
{
    if (line.StartsWith('#') || string.IsNullOrWhiteSpace(line)) { continue; }

    var chunks = line.Split(' ').Where<string>(x => !string.IsNullOrWhiteSpace(x));
    var origin = chunks.ElementAt(0);
    var redirect = chunks.ElementAt(1);

    if (chunks.Count() == 3)
    {
        var http = chunks.ElementAt(2);
    }

    (string origin, string redirect, string http) row = (chunks.ElementAt(0), chunks.ElementAt(1), chunks.Count() == 3 ? chunks.ElementAt(2): string.Empty);
    
    rules.Add(row);
}

var sb = new StringBuilder();

sb.AppendLine("{");
sb.AppendLine("    \"routes\": [");
foreach(var rule in rules)
{
    sb.AppendLine("        {");
    sb.AppendLine($"            \"route\": \"{rule.Item1}\",");
    sb.Append($"            \"redirect\": \"{rule.Item2}\"");

    if (!string.IsNullOrEmpty(rule.Item3))
    {
        sb.Append(",");
        sb.Append(Environment.NewLine);
        sb.AppendLine($"            \"statusCode\": {rule.Item3}");
    }
    
    if (rule != rules.Last())
    {
        sb.AppendLine("        },");
    }
    else{
        sb.AppendLine("        }");
    }
}

sb.AppendLine("    ]");
sb.AppendLine("}");

Console.Write(sb.ToString())