public async Task <Publication> Run(
[ActivityTrigger] PublicationConfiguration publicationConfiguration,
ILogger logger)
{
logger.LogInformation($"Started {nameof(GetLatestPublicationFromWebActivity)} for { publicationConfiguration.PublicationSourceOwner } { publicationConfiguration.PublicationSourceName}.");
Publication publication = new NullPublication(publicationConfiguration.PublicationSourceName);
using (var xmlReader = XmlReader.Create(publicationConfiguration.PublicationSourceUrl, new XmlReaderSettings()
{
Async = true
}))
{
var parser = new RssParser();
var reader = new RssFeedReader(xmlReader, parser);
while (await reader.Read())
{
if (reader.ElementType == SyndicationElementType.Item)
{
ISyndicationItem item = await reader.ReadItem();
publication = MapToPublication(publicationConfiguration, item);
break;
}
}
}
logger.LogInformation($"Found publication on web for {publicationConfiguration.PublicationSourceName}: " +
$"ID: {publication.Id}," +
$"Date: {publication.PublicationDate:F}.");
return(publication);
}
private static Publication MapToPublication(PublicationConfiguration configuration, ISyndicationItem item)
{
return(new Publication(
publicationSourceName: configuration.PublicationSourceName,
id: item.Id,
publicationDate: item.Published,
title: item.Title,
description: item.Description,
url: item.Links.FirstOrDefault()?.Uri.AbsoluteUri,
hashTags: configuration.HashTags));
}
public async Task <Publication> Run(
[ActivityTrigger] PublicationConfiguration publicationConfiguration,
[Table(Configuration.Publications.TableName)] CloudTable table,
ILogger logger)
{
logger.LogInformation($"Started {nameof(GetLatestPublicationFromHistoryActivity)} for { publicationConfiguration.PublicationSourceOwner } { publicationConfiguration.PublicationSourceName }.");
Publication latestKnownPublication = null;
var query = QueryBuilder <Publication> .CreateQueryForPartitionKey(publicationConfiguration.PublicationSourceName);
var queryResult = await table.ExecuteQuerySegmentedAsync(query, null);
latestKnownPublication = queryResult.Results.AsReadOnly().OrderByDescending(publication => publication.PublicationDate).FirstOrDefault();
if (latestKnownPublication != null)
{
logger.LogInformation($"Found publication in history for configuration: {publicationConfiguration.PublicationSourceName}, " +
$"ID: {latestKnownPublication.Id}," +
$"PublicationDate: {latestKnownPublication.PublicationDate:F}.");
}
return(latestKnownPublication ?? new NullPublication(publicationConfiguration.PublicationSourceName));
}
