public void Process(string text, string tag, VariableCollection valueCollection, BlockResult result, ref int read_pos)
{
var _nesting = 0;
int blockEnd_Start;
int blockEnd_End;
var _pos = read_pos;
while (true)
{
var _found = HtmlEngine.FindAnyTag(text, "{{", "}}", _pos, out var _start, out var _end, out var _tag);
if (!_found)
{
throw new RenderingException("No #EndIf tag found!");
}
_pos = _end;
if (_tag.StartsWith("#If ", StringComparison.OrdinalIgnoreCase))
{
_nesting++;
continue;
}
if (string.Equals(_tag, "#EndIf", StringComparison.OrdinalIgnoreCase))
{
if (_nesting > 0)
{
_nesting--;
continue;
}
blockEnd_Start = _start;
blockEnd_End = _end;
break;
}
}
var blockText = text.Substring(read_pos, blockEnd_Start - read_pos);
read_pos = blockEnd_End;
_nesting = 0;
blockEnd_Start = -1;
blockEnd_End = -1;
_pos = 0;
while (true)
{
var _found = HtmlEngine.FindAnyTag(blockText, "{{", "}}", _pos, out var _start, out var _end, out var _tag);
if (!_found)
{
break;
}
_pos = _end;
if (_tag.StartsWith("#If ", StringComparison.OrdinalIgnoreCase))
{
_nesting++;
continue;
}
if (string.Equals(_tag, "#EndIf", StringComparison.OrdinalIgnoreCase))
{
if (_nesting > 0)
{
_nesting--;
continue;
}
throw new RenderingException("Found too many #EndIf tags!");
}
if (string.Equals(_tag, "#Else", StringComparison.OrdinalIgnoreCase))
{
if (_nesting > 0)
{
continue;
}
blockEnd_Start = _start;
blockEnd_End = _end;
break;
}
}
string trueBlockText, falseBlockText;
if (blockEnd_Start >= 0)
{
trueBlockText = blockText.Substring(0, blockEnd_Start);
falseBlockText = blockText.Substring(blockEnd_End);
}
else
{
trueBlockText = blockText;
falseBlockText = string.Empty;
}
var conditionResult = false;
var conditionStart = tag.IndexOf(' ');
if (conditionStart >= 0)
{
var condition = tag.Substring(conditionStart + 1);
var invert = condition.StartsWith("!");
if (invert)
{
condition = condition.Substring(1);
}
if (valueCollection != null && valueCollection.TryGetValue(condition, out var item_value))
{
conditionResult = TruthyEngine.GetValue(item_value);
}
if (invert)
{
conditionResult = !conditionResult;
}
}
var conditionResultText = conditionResult ? trueBlockText : falseBlockText;
var blockResult = Engine.ProcessBlock(conditionResultText, valueCollection);
result.Builder.Append(blockResult.Builder);
}
public void Process(string text, string tag, VariableCollection valueCollection, BlockResult result, ref int readPos)
{
var _nesting = 0;
int blockEnd_Start;
int blockEnd_End;
var _pos = readPos;
while (true)
{
var _found = HtmlEngine.FindAnyTag(text, "{{", "}}", _pos, out var _start, out var _end, out var _tag);
if (!_found)
{
throw new RenderingException("No #EndEach tag found!");
}
_pos = _end;
if (_tag.StartsWith("#Each ", StringComparison.OrdinalIgnoreCase))
{
_nesting++;
continue;
}
if (string.Equals(_tag, "#EndEach", StringComparison.OrdinalIgnoreCase))
{
if (_nesting > 0)
{
_nesting--;
continue;
}
blockEnd_Start = _start;
blockEnd_End = _end;
break;
}
}
var blockText = text.Substring(readPos, blockEnd_Start - readPos);
readPos = blockEnd_End;
var statementStart = tag.IndexOf(' ');
if (statementStart < 0)
{
throw new RenderingException("#Each tag is missing statement!");
}
var statement = tag.Substring(statementStart + 1).Trim();
var statementVarSplit = statement.LastIndexOf('.');
if (statementVarSplit < 0)
{
throw new RenderingException("#Each tag statement is missing item alias!");
}
var objName = statement.Substring(0, statementVarSplit);
var varName = statement.Substring(statementVarSplit + 1);
if (!valueCollection.TryGetValue(objName, out var objValue))
{
throw new RenderingException($"Variable '{objName}' not found!");
}
if (objValue == null)
{
return;
}
if (!(objValue is IEnumerable <object> collection))
{
throw new RenderingException($"Variable '{objName}' is not a collection!");
}
foreach (var obj in collection)
{
var blockValues = new VariableCollection(valueCollection)
{
[varName] = obj,
};
var blockResult = Engine.ProcessBlock(blockText, blockValues);
result.Builder.Append(blockResult.Text);
// TODO: Append other block result objects?
}
}
