Udara/Udara/Common/Feature/Csv/CsvParser.cs

namespace Udara.Common.Feature.Csv;

public sealed class CsvParser : ICsvParser
{
    public IReadOnlyList<string[]> ParseRaw(string csvContent)
    {
        if (string.IsNullOrWhiteSpace(csvContent))
            return Array.Empty<string[]>();

        var lines = csvContent
            .Split('\n', StringSplitOptions.RemoveEmptyEntries);

        var rows = new List<string[]>(lines.Length);

        foreach (var line in lines)
        {
            var columns = line
                .TrimEnd('\r')
                .Split(',', StringSplitOptions.None);

            rows.Add(columns);
        }

        return rows;
    }

    public CsvParseResult Parse(string csvContent)
    {
        var raw = ParseRaw(csvContent);

        if (raw.Count == 0)
            return new CsvParseResult();

        var header = raw[0];
        var rows = raw.Skip(1).ToList();

        return new CsvParseResult
        {
            Header = header,
            Rows = rows
        };
    }
}