public (StringBuilder, StringReader) Execute(
string currentLine,
StringReader templateReader,
StringBuilder output,
IDictionary <string, object> model = null)
{
if (currentLine == null)
{
throw new ArgumentNullException(nameof(currentLine));
}
var forEachDetails = Regex.Match(currentLine, @"@foreach\s*\((?'criteria'.*)\)");
if (!forEachDetails.Success)
{
throw new MalformedException($"Malformed foreach statement: `{ currentLine }`.");
}
var loopCriteria = forEachDetails.Groups["criteria"].Value.Trim();
if (!loopCriteria.StartsWith("var"))
{
throw new MalformedException("Missing keyword `var`");
}
var variableRefs = Regex.Match(loopCriteria, @"var\s*(?'varName'[\w]+)\s*in\s*(?'collection'[\w.]+)");
if (!variableRefs.Success)
{
throw new MalformedException(loopCriteria);
}
var varName = variableRefs.Groups["varName"].Value;
var collectionNavProps = variableRefs.Groups["collection"].Value;
// resolve collection
if (!(model.GetReference(collectionNavProps) is ICollection collection))
{
throw new Exception($"`{ collectionNavProps }` isn't a valid collection");
}
// look for the loop statements.
var forBlock = BlockReader.ReadBlock(templateReader).ReadToEnd();
var engine = new RazorAlikeEngine();
foreach (var item in collection)
{
var iteratorModel = model.Clone();
iteratorModel.DefineVariable(varName, item);
var iterationOutput = engine.Run(forBlock, iteratorModel);
output.Append(iterationOutput.ToString());
}
return(output, templateReader);
}
private void EvaluateStatements(
string statements,
IDictionary <string, object> model,
StringBuilder output)
{
var engine = new RazorAlikeEngine();
var result = engine.Run(statements, model);
output.AppendLine(result);
}
public (StringBuilder, StringReader) Execute(
string currentLine,
StringReader templateReader,
StringBuilder output,
IDictionary <string, object> model = null)
{
var blockBody = BlockReader.ReadBlock(new StringReader(currentLine));
var engine = new RazorAlikeEngine();
var resolved = engine.Run(blockBody.ReadToEnd(), model);
output.AppendLine(resolved);
return(output, templateReader);
}
public void SimplePositiveCase()
{
var template = @"
Hello @user.name!
@if (@user.showId == true) { Your ID is: @user.id. }
Mail addresses:
@foreach(var email in user.Emails)
{
@email.Value
}
";
var model = new {
user = new {
name = "Joseph Climber",
id = 12345,
showId = true,
Emails = new List <object>()
{
new { Value = "*****@*****.**" },
new { Value = "*****@*****.**" },
}
}
};
var engine = new RazorAlikeEngine();
var result = engine.Run(template, model);
Assert.AreEqual(
@"
Hello Joseph Climber!
Your ID is: 12345.
Mail addresses:
[email protected]
[email protected]", result);
}