EnvelopeGenerator/EnvelopeGenerator.API/Controllers/ConfigController.cs

using EnvelopeGenerator.API.Models.PsPdfKitAnnotation;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Options;

namespace EnvelopeGenerator.API.Controllers;

/// <summary>
/// Exposes configuration data required by the client applications.
/// </summary>
/// <remarks>
/// Initializes a new instance of <see cref="ConfigController"/>.
/// </remarks>
[Route("api/[controller]")]
[ApiController]
[Authorize]
public class ConfigController(IOptionsMonitor<AnnotationParams> annotationParamsOptions) : ControllerBase
{
    private readonly AnnotationParams _annotationParams = annotationParamsOptions.CurrentValue;

    /// <summary>
    /// Returns annotation configuration that was previously rendered by MVC.
    /// </summary>
    [HttpGet("Annotations")]
    public IActionResult GetAnnotationParams()
    {
        return Ok(_annotationParams.AnnotationJSObject);
    }
}