void ParseInternal()
{
this.mainBlock = new BlockNode(null);
this.stack = new Stack<BlockNode>();
this.errors = new List<TemplateError>();
PushBlock(mainBlock);
var matches = TemplateUtils.KeywordsRegex.Matches(text);
if (matches.Count == 0)
{
stack.Peek().Nodes.Add(new LiteralNode { Text = text });
stack.Pop();
return;
}
int index = 0;
foreach (Match match in matches)
{
if (index < match.Index)
{
stack.Peek().Nodes.Add(new LiteralNode { Text = text.Substring(index, match.Index - index) });
}
var type = match.Groups["type"].Value;
var token = match.Groups["token"].Value;
var keyword = match.Groups["keyword"].Value;
var dec = match.Groups["dec"].Value;
switch (keyword)
{
case "":
case "raw":
var tok = TemplateUtils.TokenFormatRegex.Match(token);
if (!tok.Success)
AddError(true, "{0} has invalid format".FormatWith(token));
else
{
var t = TryParseValueProvider(type, tok.Groups["token"].Value, dec);
stack.Peek().Nodes.Add(new ValueNode(t, tok.Groups["format"].Value.DefaultText(null), isRaw: keyword.Contains("raw")));
DeclareVariable(t);
}
break;
case "declare":
{
var t = TryParseValueProvider(type, token, dec);
stack.Peek().Nodes.Add(new DeclareNode(t, this.AddError));
DeclareVariable(t);
}
break;
case "any":
{
AnyNode any;
ValueProviderBase vp;
var filter = TemplateUtils.TokenOperationValueRegex.Match(token);
if (!filter.Success)
{
vp = TryParseValueProvider(type, token, dec);
any = new AnyNode(vp);
}
else
{
vp = TryParseValueProvider(type, filter.Groups["token"].Value, dec);
var comparer = filter.Groups["comparer"].Value;
var value = filter.Groups["value"].Value;
any = new AnyNode(vp, comparer, value, this.AddError);
}
stack.Peek().Nodes.Add(any);
PushBlock(any.AnyBlock);
DeclareVariable(vp);
break;
}
case "notany":
{
var an = (AnyNode)PopBlock(typeof(AnyNode)).owner;
if (an != null)
PushBlock(an.CreateNotAny());
break;
}
case "endany":
{
PopBlock(typeof(AnyNode));
break;
}
case "foreach":
{
ValueProviderBase vp = TryParseValueProvider(type, token, dec);
var fn = new ForeachNode(vp);
stack.Peek().Nodes.Add(fn);
PushBlock(fn.Block);
vp.IsForeach = true;
DeclareVariable(vp);
break;
}
case "endforeach":
{
PopBlock(typeof(ForeachNode));
}
break;
case "if":
{
IfNode ifn;
ValueProviderBase vp;
var filter = TemplateUtils.TokenOperationValueRegex.Match(token);
if (!filter.Success)
{
vp = TryParseValueProvider(type, token, dec);
ifn = new IfNode(vp, this);
}
else
{
vp = TryParseValueProvider(type, filter.Groups["token"].Value, dec);
var comparer = filter.Groups["comparer"].Value;
var value = filter.Groups["value"].Value;
ifn = new IfNode(vp, comparer, value, this.AddError);
}
stack.Peek().Nodes.Add(ifn);
PushBlock(ifn.IfBlock);
DeclareVariable(vp);
break;
}
case "else":
{
var ifn = (IfNode)PopBlock(typeof(IfNode)).owner;
if (ifn != null)
PushBlock(ifn.CreateElse());
break;
}
case "endif":
{
PopBlock(typeof(IfNode));
break;
}
default :
AddError(true, "'{0}' is deprecated".FormatWith(keyword));
break;
}
index = match.Index + match.Length;
}
if (stack.Count != 1)
AddError(true, "Last block is not closed: {0}".FormatWith(stack.Peek()));
var lastM = matches.Cast<Match>().LastOrDefault();
if (lastM != null && lastM.Index + lastM.Length < text.Length)
stack.Peek().Nodes.Add(new LiteralNode { Text = text.Substring(lastM.Index + lastM.Length) });
stack.Pop();
}
