protected override void Parse()
{
document = XDocument.Load(templateFile.FullName, LoadOptions.PreserveWhitespace);
rootPart = new XMLTemplatePart(document.Root);
rootPart.Parse();
Root = rootPart;
}
private void ParseElement(XElement element)
{
// Scan for comments
// For each token comment, add it to token collection
// For each start of template, next node is the template
// - There should only be one between start and end of a template
// Then also check the attributes for token replacements
bool atleastOneReplacement = false;
List <XAttribute> attributes = new List <XAttribute>();
foreach (XAttribute attribute in element.Attributes())
{
if (TryParseAttributeValueForTokens(attribute.Name, attribute.Value, out XmlAttributeTemplateToken toReplace))
{
attributes.Add(toReplace);
atleastOneReplacement = true;
}
else
{
attributes.Add(attribute);
}
}
if (atleastOneReplacement)
{
element.ReplaceAttributes(attributes);
}
List <Action> replacementActions = new List <Action>();
string templateStartKey = null;
bool seenTemplateBody = false;
foreach (XNode node in element.Nodes())
{
if (node is XComment comment)
{
switch (GetTokenType(comment, out string tokenKey))
{
case TokenType.ReplacementToken:
XmlCommentTemplateToken xmlCommentTemplateToken = new XmlCommentTemplateToken(comment.Value);
AddReplacementToken(tokenKey, xmlCommentTemplateToken);
replacementActions.Add(() => comment.ReplaceWith(xmlCommentTemplateToken));
break;
case TokenType.TemplateStart:
templateStartKey = tokenKey;
seenTemplateBody = false;
break;
case TokenType.TemplateEnd:
if (templateStartKey == null)
{
throw new InvalidOperationException($"We have template end '{tokenKey}' without equivalent start.");
}
else if (!Equals(templateStartKey, tokenKey))
{
throw new InvalidOperationException($"We have template end '{tokenKey}' but the template start was different '{templateStartKey}'.");
}
else if (!seenTemplateBody)
{
throw new InvalidOperationException($"We have template '{tokenKey}' without a body.");
}
else
{
templateStartKey = null;
seenTemplateBody = false;
}
break;
}
}
else if (node is XElement childElement)
{
if (templateStartKey != null)
{
if (seenTemplateBody)
{
throw new InvalidOperationException($"Template '{templateStartKey}' can only have one body node.");
}
else
{
XMLTemplatePart templatePart = new XMLTemplatePart(childElement);
templatePart.Parse();
templates.Add(templateStartKey, templatePart);
replacementActions.Add(() => childElement.ReplaceWith(templatePart));
seenTemplateBody = true;
}
}
else
{
ParseElement(childElement);
}
}
}
replacementActions.ForEach(t => t());
}