public ProcessNodeResults ProcessNode(
[NotNull] XElement element,
[NotNull] IConfiguration configuration)
{
if (element == null)
{
throw new ArgumentNullException(nameof(element));
}
if (configuration == null)
{
throw new ArgumentNullException(nameof(configuration));
}
var attributeName = XName.Get("applyWhen", XmlTemplate.ConfigGenXmlNamespace);
var attribute = element.Attribute(attributeName);
if (attribute == null)
{
throw new ArgumentException("Supplied element should contain an attribute with name 'applyWhen' in the configgen namespace.", nameof(element));
}
var expression = attribute.Value;
if (expression.IsNullOrEmpty())
{
attribute.Remove();
return(ProcessNodeResults.CreateErrorResult(XmlTemplateErrorCodes.ConditionProcessingError, "Condition error: and empty condition was encountered"));
}
ExpressionEvaluationResults evaluationResults = _evaluator.Evaluate(configuration.ConfigurationName, expression, element.Name);
foreach (var usedToken in evaluationResults.UsedTokens)
{
if (configuration.Contains(usedToken))
{
_tokenUsageTracker.OnTokenUsed(configuration.ConfigurationName, usedToken);
}
else
{
_tokenUsageTracker.OnTokenNotRecognised(configuration.ConfigurationName, usedToken);
}
}
if (evaluationResults.Result)
{
attribute.Remove();
}
else
{
element.Remove();
}
if (evaluationResults.ErrorCode != null)
{
return(ProcessNodeResults.CreateErrorResult(evaluationResults.ErrorCode, evaluationResults.ErrorMessage));
}
return(ProcessNodeResults.CreateSuccessResult());
}
public string Target(Match match)
{
var tokenName = match.Groups[_tokenMatchGroupName].Value;
object value;
if (_configuration.TryGetValue(tokenName, out value) &&
value != null)
{
_tokenUsageTracker.OnTokenUsed(_configuration.ConfigurationName, tokenName);
return(value.ToString());
}
_tokenUsageTracker.OnTokenNotRecognised(_configuration.ConfigurationName, tokenName);
return(null);
}
protected ExpressionEvaluationResults EvaluateCondition(
[NotNull] XElement element,
[NotNull] IConfiguration configuration,
[NotNull] IConfigurationExpressionEvaluator configurationExpressionEvaluator)
{
if (element == null)
{
throw new ArgumentNullException(nameof(element));
}
if (configuration == null)
{
throw new ArgumentNullException(nameof(configuration));
}
if (configurationExpressionEvaluator == null)
{
throw new ArgumentNullException(nameof(configurationExpressionEvaluator));
}
string expression = null;
var conditionAttribute = element.Attribute(XName.Get(ConditionAttributeName, string.Empty));
if (conditionAttribute != null)
{
expression = conditionAttribute.Value;
}
ExpressionEvaluationResults evaluationResults = configurationExpressionEvaluator.Evaluate(configuration.ConfigurationName, expression, element.Name);
foreach (var usedToken in evaluationResults.UsedTokens)
{
if (configuration.Contains(usedToken))
{
_tokenUsageTracker.OnTokenUsed(configuration.ConfigurationName, usedToken);
}
else
{
_tokenUsageTracker.OnTokenNotRecognised(configuration.ConfigurationName, usedToken);
}
}
return(evaluationResults);
}
public SingleTemplateRenderResults Render([NotNull] IConfiguration configuration)
{
if (configuration == null)
{
throw new ArgumentNullException(nameof(configuration));
}
if (_loadedTemplate == null)
{
throw new InvalidOperationException("Cannot render a template that has not been loaded.");
}
try
{
var settings = configuration.ToDictionary();
RazorTemplateRenderResult renderResult = _razorEngineRenderer.Render(settings);
if (!renderResult.Success)
{
return(new SingleTemplateRenderResults(
configuration: configuration,
status: TemplateRenderResultStatus.Failure,
renderedResult: null,
encoding: _encoding,
errors: new[] { new RazorTemplateError(RazorTemplateErrorCodes.GeneralRazorTemplateError, renderResult.Error) }));
}
var preferenceFailures = _preferencesManager.ApplyDefaultPreferences(renderResult.AppliedPreferences);
if (preferenceFailures.Any())
{
return(new SingleTemplateRenderResults(
configuration: configuration,
status: TemplateRenderResultStatus.Failure,
renderedResult: null,
encoding: _encoding,
errors: preferenceFailures));
}
foreach (var settingName in settings)
{
if (renderResult.UsedTokens.Contains(settingName.Key))
{
_tokenUsageTracker.OnTokenUsed(configuration.ConfigurationName, settingName.Key);
}
}
foreach (var settingName in renderResult.UnrecognisedTokens)
{
_tokenUsageTracker.OnTokenNotRecognised(configuration.ConfigurationName, settingName);
}
return(new SingleTemplateRenderResults(
configuration: configuration,
status: TemplateRenderResultStatus.Success,
renderedResult: renderResult.RenderedResult,
encoding: _encoding,
errors: null));
}
catch (Exception ex)
{
return(new SingleTemplateRenderResults(
configuration: configuration,
status: TemplateRenderResultStatus.Failure,
renderedResult: null,
encoding: _encoding,
errors: new[] { new RazorTemplateError(RazorTemplateErrorCodes.GeneralRazorTemplateError, $"{ex.GetType().Name}: {ex.Message}") }));
}
}
