Umbraco-CMS/src/Umbraco.Core/Models/MediaExtensions.cs

using System.Linq;
using Umbraco.Cms.Core.Configuration.Models;
using Umbraco.Cms.Core.Models;
using Umbraco.Cms.Core.PropertyEditors;

namespace Umbraco.Extensions
{
    public static class MediaExtensions
    {
        /// <summary>
        /// Gets the URL of a media item.
        /// </summary>
        public static string GetUrl(this IMedia media, string propertyAlias, MediaUrlGeneratorCollection mediaUrlGenerators)
        {
            if (media.TryGetMediaPath(propertyAlias, mediaUrlGenerators, out var mediaPath))
            {
                return mediaPath;
            }

            return string.Empty;
        }

        /// <summary>
        /// Gets the URLs of a media item.
        /// </summary>
        public static string[] GetUrls(this IMedia media, ContentSettings contentSettings, MediaUrlGeneratorCollection mediaUrlGenerators)
            => contentSettings.Imaging.AutoFillImageProperties
                .Select(field => media.GetUrl(field.Alias, mediaUrlGenerators))
                .Where(link => string.IsNullOrWhiteSpace(link) == false)
                .ToArray();
    }
}