getsvg.cs

namespace Demo
{
    using Scriban.Runtime;
    using Sitecore.Abstractions;
    using Sitecore.Data.Items;
    using Sitecore.XA.Foundation.Abstractions;
    using Sitecore.XA.Foundation.Scriban.Pipelines.GenerateScribanContext;
    using System;
    using System.IO;
    using FieldRendererBase = Sitecore.XA.Foundation.Scriban.FieldRendererBase;

    public class GetSVGFunction : FieldRendererBase, IGenerateScribanContextProcessor
    {
        protected readonly BaseMediaManager baseMediaManager;

        protected readonly IPageMode pageMode;

        private delegate string GenerateSVGContent(Item item, string field, bool fallback);

        public GetSVGFunction(BaseMediaManager baseMediaManager, IPageMode pageMode)
        {
            this.baseMediaManager = baseMediaManager;
            this.pageMode = pageMode;
        }

        public void Process(GenerateScribanContextPipelineArgs args)
        {
            RenderingWebEditingParams = args.RenderingWebEditingParams;
            args.GlobalScriptObject.Import("sc_svg", new GenerateSVGContent(GetSVGContent));
        }

        private string GetSVGContent(Item item, string field, bool fallback)
        {
            if (string.IsNullOrEmpty(item[field.ToString()]))
            {
                return string.Empty;
            }

            var imageField = new Sitecore.Data.Fields.ImageField(item.Fields[field.ToString()]);

            if (imageField == null || imageField.MediaItem == null)
            {
                return string.Empty;
            }

            var media = this.baseMediaManager.GetMedia(imageField.MediaItem);

            if (media.Extension.Equals("svg", StringComparison.OrdinalIgnoreCase))
            {
                string svg = string.Empty;
                using (var reader = new StreamReader(this.baseMediaManager.GetMedia(imageField.MediaItem).GetStream().Stream))
                {
                    svg = reader.ReadToEnd();
                }

                return svg;
            }
            else
            {
                if (fallback)
                {
                    return CreateFieldRenderer(item, field).Render();
                }
                else
                {
                    return this.pageMode.IsExperienceEditor ? "<p>The selected image is not a SVG!</p>" : string.Empty;
                }
            }
        }
    }
}