Public/New-RssFeed.ps1
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# Consider adding these channel-level elements later: # - language # - copyright # - managingEditor # - webMaster # - category # - generator # - docs # - ttl # - image # - rating # - skipHours/skipDays function New-RssFeed { param ( [Parameter(Mandatory)] [string]$Title, [Parameter(Mandatory)] [string]$Link, [Parameter(Mandatory)] [string]$Description, [Nullable[DateTime]]$PubDate, [Nullable[DateTime]]$LastBuildDate, [Parameter(ValueFromPipeline)] [RssItem[]]$Items ) begin { $CachedItems = New-Object -TypeName System.Collections.Generic.List[RssItem] } process { if ($Items) { $CachedItems.AddRange($Items) } } end { $MemoryStream = New-Object -TypeName System.IO.MemoryStream $XmlWriterSettings = New-Object -TypeName System.Xml.XmlWriterSettings $XmlWriterSettings.Indent = $true $XmlWriterSettings.Encoding = [System.Text.Encoding]::Utf8 $XmlWriter = [System.Xml.XmlWriter]::Create($MemoryStream, $XmlWriterSettings) $XmlWriter.WriteStartDocument() $XmlWriter.WriteStartElement('rss') $XmlWriter.WriteAttributeString('version', '2.0') $XmlWriter.WriteStartElement('channel') $XmlWriter.WriteStartElement('title') $XmlWriter.WriteCData($Title) $XmlWriter.WriteEndElement() $XmlWriter.WriteElementString('link', $Link) $XmlWriter.WriteStartElement('description') $XmlWriter.WriteCData($Description) $XmlWriter.WriteEndElement() if ($PubDate) { $XmlWriter.WriteElementString('pubDate', (ConvertTo-Rfc822DateTime -DateTime $Pubdate)) } if ($LastBuildDate) { $XmlWriter.WriteElementString('lastBuildDate', (ConvertTo-Rfc822DateTime -DateTime $LastBuildDate)) } $CachedItems | ForEach-Object { $_.Write($XmlWriter) } $XmlWriter.WriteEndElement() # channel $XmlWriter.WriteEndElement() # rss $XmlWriter.WriteEndDocument() $XmlWriter.Flush() [System.Text.Encoding]::Utf8.GetString($MemoryStream.ToArray()) } } |