// Using Kentico site export, find all templates that include DocumentDataSource with path expressions pointing to other documents (which will break when document tree moves)
// Uses LINQPad's C# Statements format

//Root directory where the unzipped Kentico export file sit (with Data subdirectory)
string exportDirPath = @"<UNZIPPED_FULL_SITE_EXPORT>\Data";

//XML files for documents and templates definitions
XDocument templateSource = XDocument.Load(exportDirPath + @"\Objects\cms_pagetemplate.xml.export");
XDocument siteTemplateSource = XDocument.Load(exportDirPath + @"\Site\cms_pagetemplate.xml.export");


//combine the template sources with the same shape
var allTemplates =
	(
		(from t1 in templateSource.XPathSelectElements("//NewDataSet/cms_pagetemplate") select t1)
			.Union
		(from t2 in siteTemplateSource.XPathSelectElements("//NewDataSet/cms_pagetemplate") select t2)
	).OrderBy(t => t.Element("PageTemplateDisplayName").Value);

var matches =
	(
		from t in allTemplates
		where t.Element("PageTemplateWebParts") != null
		let webpartsXML = XDocument.Parse(t.Element("PageTemplateWebParts").Value) //webparts are encoded XML inside an XML element
		let props =
			(
				from part in webpartsXML.XPathSelectElements("//webpart[@type='DocumentsDataSource']")
				let pathCol = part.XPathSelectElements("property[@name='path']") //realistically, can return one or none, in the collection
				where pathCol.Count()>0 //not all DataSources have path, no idea what it picks up then, but we don't need to change it
				select (new {
					ControlID = part.Attribute("controlid").Value,
					Path = pathCol.First().Value
					})
			)
		let templateName = t.Element("PageTemplateDisplayName").Value
		where props.Count() > 0 //only show templates that actually have DocumentsDataSource webparts
		select new {templateName, props}
	);

matches.Dump("Templates with enumerations of other pages");