EnvelopeGenerator/EnvelopeGenerator.Web/Controllers/LocalizationController.cs

using EnvelopeGenerator.Application.Resources;
using EnvelopeGenerator.Web.Extensions;
using EnvelopeGenerator.Web.Models;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Localization;

namespace EnvelopeGenerator.Web.Controllers
{
    [ApiController]
    [Route("api/[controller]")]
    public class LocalizationController : ControllerBase
    {
        private readonly ILogger<LocalizationController> _logger;

        private readonly IStringLocalizer<Resource> _localizer;

        private readonly MultiCulture _cultures;

        public LocalizationController(IStringLocalizer<Resource> localizer, MultiCulture cultures, ILogger<LocalizationController> logger)
        {
            _localizer = localizer;
            _cultures = cultures;
            _logger = logger;
        }

        [HttpGet]
        public IActionResult GetLocalized([FromQuery] string[]? name = null, [FromQuery] string[]? ignore = null)
        {
            ignore ??= Array.Empty<string>();
            var pairs = name?.ToDictionary(n => n, n => _localizer[n].Value)
                ?? _localizer.GetAllStrings().Where(ls => !ignore.Contains(ls.Name)).ToDictionary(ls => ls.Name, ls => ls.Value); ;
            return Ok(pairs);
        }

        [HttpPost("lang/{culture}")]
        public IActionResult SetLanguage([FromRoute] string culture)
        {
            if (!_cultures.Languages.Contains(culture))
                return BadRequest();

            Response.Cookies.SetCulture(culture);

            return Redirect(Request.Headers["Referer"].ToString());
        }

        [HttpGet("lang")]
        public IActionResult GetLanguages() => Ok(_cultures.Languages);
    }
}