config.wyam

#recipe Blog
#theme SolidState

#n Microsoft.SyndicationFeed.ReaderWriter -v 1.0.2

using System.Net;
using System.Threading;
using System.Threading.Tasks;
using System.IO;
using System.Xml;
using Microsoft.SyndicationFeed;
using Microsoft.SyndicationFeed.Rss;
using Microsoft.SyndicationFeed.Atom;

// Customize your settings and add new ones here
Settings[Keys.Host] = "devchatter.com";
Settings[BlogKeys.Title] = "DevChatter";
Settings[BlogKeys.Description] = "Welcome to DevChatter!";
Settings[BlogKeys.Image] = "/images/basic-banner.png";
Settings["LinkHideExtensions"] = false;
//Settings["Intro"] = "Where the dev chat never stops!";

// Add any pipeline customizations here
Pipelines.Add("VideoFeed",
    new Execute((inputs, ctx, _) => GetFeedData.GetFeedDataWorker(inputs, ctx).Result),
    //new Content((doc, ctx) => $"Title: { doc.String("Title") }, Description: { doc.String("Description") }"),
    new Razor().WithLayout("_VideoLayout.cshtml"),
    new WriteFiles((doc, ctx) => 
    {
        DateTime publishedDate = DateTime.Parse(doc.String("Published"));
        return $"videos\\{publishedDate:yyyyMMdd}-{doc.String("Filename")}.html";
    })
);

public class GetFeedData
{
    public static async Task<IEnumerable<IDocument>>
        GetFeedDataWorker(IReadOnlyList<IDocument> inputs,
        IExecutionContext context)
    {
        const string feedUrl = "https://twitchrss.appspot.com/vod/devchatter";
        var xmlReaderSettings = new XmlReaderSettings
        {
            Async = true,
            DtdProcessing = DtdProcessing.Ignore
        };

        using (WebClient webClient = new WebClient())
        using(var stream = await webClient.OpenReadTaskAsync(feedUrl))
        using(StreamReader streamReader = new StreamReader(stream))
        using(XmlReader xmlReader = XmlReader.Create(streamReader, xmlReaderSettings))
        {
            List<IDocument> outputs = new List<IDocument>();

            xmlReader.MoveToContent();
            Wyam.Common.Tracing.Trace.Information($"Read feed");
            XmlFeedReader feedReader = new RssFeedReader(xmlReader);
            while(await feedReader.Read())
            {
                if(feedReader.ElementType == SyndicationElementType.Item)
                {
                    // Create a Wyam document from the RSS item
                    ISyndicationItem item = await feedReader.ReadItem();
                    IDocument doc = context.GetDocument(new MetadataItems
                    {
                        { "Title", item.Title },
                        { "Link", item.Links.FirstOrDefault(x => x.RelationshipType == RssLinkTypes.Alternate)?.Uri.ToString() ?? item.Id },
                        { "Published", item.Published },
                        { "Description", item.Description },
                        { "Filename", item.Id }
                    });
                    outputs.Add(doc);
                }
            }
        return outputs;
        }
    }
}