private async Task <TDocument> CreateDocumentAsync <TDocument>(DocumentCreate create)
{
Validator.ValidateNotNull(create, nameof(create));
Validator.Validate(create);
Template template = null;
try
{
template = await _templateRepository.GetTemplateAsync(create.TemplateId);
}
catch (EntityNotFoundException ex)
{
ThrowEntityNotFoundAsClientModelValidation(ex, nameof(create.TemplateId));
}
ValidateDocumentAgainstTemplate(create, template);
return(await _documentRenderer.RenderAsync <TDocument>(
template.Markup,
template.MarkupVersion,
new DocumentRenderModel()
{
Items = create.InputValues.Select(kvp => new DocumentRenderModelItem()
{
Reference = kvp.Key,
Value = ((object)kvp.Value).ToString()
}),
Sign = template.IsSignable ? create.GetIsSigned() : false,
Exports = _documentExportsFactory.Create(template, create.InputValues)
}));
}
private void ValidateDocumentAgainstTemplate(DocumentCreate create, Template template)
{
var inputValueErrors = new ModelErrorDictionary();
// Store the traversed values so we can easily analyse conditional inputs. It's fine to just store them as strings as we
// have already validated their types and value comparison will work for stringified booleans and numbers.
var validInputStringValues = new Dictionary <string, string>();
template.Steps.ForEach(templateStep =>
{
var allConditionsMet = templateStep.Conditions.All(condition =>
{
if (condition.Type == TemplateComponentConditionType.EqualsPreviousInputValue)
{
var expectedPreviousInputValue = DynamicUtility.Unwrap <string>(() => condition.TypeData.PreviousInputValue);
var previousInputId = DynamicUtility.Unwrap <string>(() => condition.TypeData.PreviousInputId);
if (string.IsNullOrEmpty(expectedPreviousInputValue) || string.IsNullOrEmpty(previousInputId))
{
throw new Exception("Internal error: invalid template");
}
return(validInputStringValues.ContainsKey(previousInputId) && expectedPreviousInputValue.Equals(validInputStringValues[previousInputId]));
}
else if (condition.Type == TemplateComponentConditionType.IsDocumentSigned)
{
// Skip this step if the contract won't be signed
return(create.GetIsSigned());
}
return(false);
});
if (!allConditionsMet)
{
return;
}
var templateStepId = templateStep.Id;
var defaultTemplateStepInput = templateStep.Inputs.SingleOrDefault(i => string.IsNullOrEmpty(i.Key));
if (defaultTemplateStepInput != null)
{
var result = ValidateTemplateStepInput(templateStep, defaultTemplateStepInput, create.InputValues, inputValueErrors, isDefaultInput: true);
if (result.success)
{
validInputStringValues.Add(result.templateStepInputId, result.inputValueString);
}
}
templateStep.Inputs
.Where(templateStepInput => !string.IsNullOrEmpty(templateStepInput.Key))
.ForEach(templateStepInput =>
{
var result = ValidateTemplateStepInput(templateStep, templateStepInput, create.InputValues, inputValueErrors, isDefaultInput: false);
if (result.success)
{
validInputStringValues.Add(result.templateStepInputId, result.inputValueString);
}
});
});
inputValueErrors.AssertValid();
}