public override bool CheckForValidationErrors <TProperty>(
GovUkViewModel model,
PropertyInfo property,
TProperty parameterValue)
{
if (typeof(TProperty) != typeof(string))
{
throw new Exception("Parameter value has the wrong type");
}
var value = parameterValue as string;
if (value.Length < 8)
{
model.AddErrorFor(property, "Password must be at least 8 characters long");
return(false);
}
if (!value.Any(char.IsLower) || !value.Any(char.IsUpper) || !value.Any(char.IsNumber))
{
model.AddErrorFor(property, "Password must have at least one lower case letter, one capital letter and one number");
return(false);
}
if (value.Contains("password"))
{
model.AddErrorFor(property, "Enter a password that doesn't contain 'password'");
return(false);
}
return(true);
}
public static void AddErrorMessageBasedOnPropertyDisplayName(
GovUkViewModel model,
PropertyInfo property,
Func <string, string> getErrorMessageBasedOnPropertyDisplayName,
ErrorMessagePropertyNamePosition position)
{
var displayNameForErrorsAttribute = property.GetSingleCustomAttribute <GovUkDisplayNameForErrorsAttribute>();
string errorMessage;
if (displayNameForErrorsAttribute != null)
{
switch (position)
{
case ErrorMessagePropertyNamePosition.StartOfMessage:
errorMessage = getErrorMessageBasedOnPropertyDisplayName(displayNameForErrorsAttribute.NameAtStartOfSentence);
break;
case ErrorMessagePropertyNamePosition.WithinMessage:
errorMessage = getErrorMessageBasedOnPropertyDisplayName(displayNameForErrorsAttribute.NameWithinSentence);
break;
default:
throw new ArgumentOutOfRangeException(nameof(position), position, null);
}
}
else
{
errorMessage = getErrorMessageBasedOnPropertyDisplayName(property.Name);
}
model.AddErrorFor(property, errorMessage);
}
private static void AddInvalidNumberOfSelectedItemsErrorMessage(
GovUkViewModel model,
PropertyInfo property,
StringValues parameterValues)
{
var responsesRangeAttribute = property.GetSingleCustomAttribute <GovUkValidateCheckboxNumberOfResponsesRangeAttribute>();
var displayNameForErrorsAttribute = property.GetSingleCustomAttribute <GovUkDisplayNameForErrorsAttribute>();
string propertyNameForErrorMessage = displayNameForErrorsAttribute?.NameWithinSentence ?? property.Name;
string errorMessage;
if (IsTooFewSelected(property, parameterValues))
{
if (parameterValues.Count == 0 &&
responsesRangeAttribute.ErrorMessageIfNothingSelected != null)
{
errorMessage = responsesRangeAttribute.ErrorMessageIfNothingSelected;
}
else
{
errorMessage = $"Select at least {responsesRangeAttribute.MinimumSelected} " +
$"options for {propertyNameForErrorMessage}";
}
}
else // Implicitly, the user must have selected too many options
{
errorMessage = $"Select at most {responsesRangeAttribute.MaximumSelected} " +
$"options for {propertyNameForErrorMessage}";
}
model.AddErrorFor(property, errorMessage);
}
public static void AddRequiredAndMissingErrorMessage(GovUkViewModel model, PropertyInfo property)
{
var requiredAttribute = property.GetSingleCustomAttribute <GovUkValidateRequiredAttribute>();
var requiredIfAttribute = property.GetSingleCustomAttribute <GovUkValidationRequiredIfAttribute>();
var displayNameForErrorsAttribute = property.GetSingleCustomAttribute <GovUkDisplayNameForErrorsAttribute>();
string requiredErrorMessage = requiredAttribute != null
? requiredAttribute.ErrorMessageIfMissing
: requiredIfAttribute?.ErrorMessageIfMissing;
string errorMessage;
if (requiredErrorMessage != null)
{
errorMessage = requiredErrorMessage;
}
else if (displayNameForErrorsAttribute != null)
{
errorMessage = $"{displayNameForErrorsAttribute.NameAtStartOfSentence} is required";
}
else
{
errorMessage = $"{property.Name} is required";
}
model.AddErrorFor(property, errorMessage);
}
public override bool CheckForValidationErrors <TProperty>(GovUkViewModel model, PropertyInfo property, TProperty parameterValue)
{
var attribute = GetAttribute <GovUkValidationRegularExpressionAttribute>(property);
var value = parameterValue?.ToString();
bool matches = Matches(attribute.Pattern, value);
if (matches)
{
return(true);
}
model.AddErrorFor(property, attribute.ErrorMessage);
return(false);
}
private static void AddExceedsCharacterCountErrorMessage(GovUkViewModel model, PropertyInfo property)
{
var characterCountAttribute = property.GetSingleCustomAttribute <GovUkValidateCharacterCountAttribute>();
var displayNameForErrorsAttribute = property.GetSingleCustomAttribute <GovUkDisplayNameForErrorsAttribute>();
string errorMessage;
if (displayNameForErrorsAttribute != null)
{
errorMessage = $"{displayNameForErrorsAttribute.NameAtStartOfSentence} must be {characterCountAttribute.MaxCharacters} characters or fewer";
}
else
{
errorMessage = $"{property.Name} must be {characterCountAttribute.MaxCharacters} characters or fewer";
}
model.AddErrorFor(property, errorMessage);
}
public static void AddErrorMessageBasedOnPropertyDisplayName(
GovUkViewModel model,
PropertyInfo property,
Func <string, string> getErrorMessageBasedOnPropertyDisplayName)
{
var displayNameForErrorsAttribute = property.GetSingleCustomAttribute <GovUkDisplayNameForErrorsAttribute>();
string errorMessage;
if (displayNameForErrorsAttribute != null)
{
errorMessage = getErrorMessageBasedOnPropertyDisplayName(displayNameForErrorsAttribute.NameWithinSentence);
}
else
{
errorMessage = getErrorMessageBasedOnPropertyDisplayName(property.Name);
}
model.AddErrorFor(property, errorMessage);
}
public static void AddRequiredAndMissingErrorMessage(GovUkViewModel model, PropertyInfo property)
{
var requiredAttribute = property.GetSingleCustomAttribute <GovUkValidateRequiredAttribute>();
var displayNameForErrorsAttribute = property.GetSingleCustomAttribute <GovUkDisplayNameForErrorsAttribute>();
string errorMessage;
if (requiredAttribute.ErrorMessageIfMissing != null)
{
errorMessage = requiredAttribute.ErrorMessageIfMissing;
}
else if (displayNameForErrorsAttribute != null)
{
errorMessage = $"Select {displayNameForErrorsAttribute.NameWithinSentence}";
}
else
{
errorMessage = $"Select {property.Name}";
}
model.AddErrorFor(property, errorMessage);
}