Generic.CL/Services/AdvancedQueryBuilder.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Generic.Services;

public class AdvancedQueryBuilder
{
    private readonly StringBuilder _builder;
    private string _preText = string.Empty;
    private string _afterText = string.Empty;
    private string _separator = "&";

    public AdvancedQueryBuilder()
    {
        _builder = new StringBuilder();
    }

    public AdvancedQueryBuilder AddPreText(string preText)
    {
        _preText = preText;
        return this;
    }

    public AdvancedQueryBuilder AddAfterText(string afterText)
    {
        _afterText = afterText;
        return this;
    }

    public AdvancedQueryBuilder AddSeprator(string separator)
    {
        _separator = separator;
        return this;
    }

    public AdvancedQueryBuilder AddModels(params object?[] models)
    {
        if (models == null)
            return this;

        foreach (var model in models)
        {
            if (model == null)
                continue;

            var properties = model.GetType().GetProperties();
            foreach (var prop in properties)
            {
                var value = prop.GetValue(model)?.ToString();
                if (!string.IsNullOrEmpty(value))
                {
                    AppendParameter(prop.Name.ToLower(), value);
                }
            }
        }
        return this;
    }

    private void AppendParameter(string key, string value)
    {
        if (_builder.Length > 0)
            _builder.Append(_separator);
        _builder.Append($"{Uri.EscapeDataString(key)}={Uri.EscapeDataString(value)}");
    }

    public override string ToString() => $"{_preText}{_builder}{_afterText}";
}