public static ValidationResponse Validate(string value, int column, Func <string, int, ValidationResponse> validateDataFunc, bool allowProceedingSpaces = false, bool allowTrailingSpaces = false, bool allowEmptyValue = false, int?minLength = null, int?maxLength = null)
{
if (string.IsNullOrEmpty(value))
{
if (allowEmptyValue)
{
return(ValidationResponse.Success);
}
else
{
return(ValidationResponse.FailData("Unexpected empty value", value, column));
}
}
if (!allowProceedingSpaces && value[0] == ' ')
{
return(ValidationResponse.FailData("Unexpected proceeding space", value, column));
}
if (!allowTrailingSpaces && value[value.Length - 1] == ' ')
{
return(ValidationResponse.FailData("Unexpected trailing space", value, column));
}
if (minLength != null && value.Length < minLength.Value)
{
return(ValidationResponse.FailData(string.Format("Minimum length {0} not met", minLength.Value), value, column));
}
if (maxLength != null && value.Length > maxLength.Value)
{
return(ValidationResponse.FailData(string.Format("Maximum length {0} exceeded", maxLength.Value), value, column));
}
return(validateDataFunc(value, column));
}
public static ValidationResponse ValidateFormat(TextQualifierOption[] columns, string value, DelimitedStringFormatValidatorOptions options)
{
if (columns == null)
{
throw new ArgumentNullException("columns");
}
if (columns.Length < 1)
{
throw new ArgumentOutOfRangeException("columns");
}
if (string.IsNullOrEmpty(value))
{
if (options.IgnoreEmptyLines)
{
return(ValidationResponse.Success);
}
else
{
return(ValidationResponse.FailFormat("Unexpected empty line", 1, null, options.IncludeFailureDetails));
}
}
var insideText = false;
var lastCharacterEndedTextField = false;
var lastCharacterIsEscapeCharacter = false;
var lastCharacterIsDelimiter = false;
var fieldsFound = 1;
var fieldsExpected = columns.Length;
var lastIndex = value.Length - 1;
var currentFieldOption = columns[0];
var last10 = new Queue <char>();
for (var i = 0; i < value.Length; i++)
{
if (i >= 10)
{
last10.Dequeue();
}
last10.Enqueue(value[i]);
if (lastCharacterIsEscapeCharacter && value[i] != options.EscapeCharacter && value[i] != options.TextQualifier)
{
return(ValidationResponse.FailFormat(string.Format("Expected {0} or {1}", options.EscapeCharacter, options.TextQualifier), i, last10, options.IncludeFailureDetails));
}
if (lastCharacterIsDelimiter)
{
if (currentFieldOption == TextQualifierOption.Required && value[i] != options.TextQualifier)
{
return(ValidationResponse.FailFormat("Expected text qualifier", i, last10, options.IncludeFailureDetails));
}
if (currentFieldOption == TextQualifierOption.Excluded && value[i] == options.TextQualifier)
{
return(ValidationResponse.FailFormat("Unexpected text qualifier", i, last10, options.IncludeFailureDetails));
}
}
if (lastCharacterEndedTextField)
{
if (value[i] != options.Delimiter)
{
return(ValidationResponse.FailFormat("Expected delimiter", i, last10, options.IncludeFailureDetails));
}
lastCharacterEndedTextField = false;
}
if (insideText)
{
if (i == lastIndex && value[i] != options.TextQualifier)
{
return(ValidationResponse.FailFormat("Expected text qualifier", i, last10, options.IncludeFailureDetails));
}
else
{
if (!lastCharacterIsEscapeCharacter)
{
if (value[i] == options.TextQualifier)
{
if (i == lastIndex)
{
lastCharacterEndedTextField = true;
insideText = false;
}
else
{
if (value[i + 1] == options.Delimiter)
{
lastCharacterEndedTextField = true;
insideText = false;
}
else if (value[i] == options.EscapeCharacter)
{
lastCharacterIsEscapeCharacter = true;
}
}
}
else if (value[i] == options.EscapeCharacter)
{
lastCharacterIsEscapeCharacter = true;
}
}
else
{
if (options.TextQualifier == options.EscapeCharacter)
{
lastCharacterIsEscapeCharacter = false;
}
}
}
}
else
{
if (value[i] == options.Delimiter)
{
lastCharacterIsDelimiter = true;
fieldsFound++;
if (fieldsFound > fieldsExpected)
{
return(ValidationResponse.FailFormat("Too many fields", i, null, options.IncludeFailureDetails));
}
currentFieldOption = columns[fieldsFound - 1];
}
else
{
lastCharacterIsDelimiter = false;
if (value[i] == options.TextQualifier)
{
insideText = true;
}
else
{
lastCharacterIsEscapeCharacter = value[i] == options.EscapeCharacter;
}
}
}
}
if (fieldsFound < fieldsExpected)
{
return(ValidationResponse.FailFormat("Not enough fields", value.Length, null, options.IncludeFailureDetails));
}
if (insideText)
{
return(ValidationResponse.FailFormat("Unterminated text qualifier", value.Length, null, options.IncludeFailureDetails));
}
return(ValidationResponse.Success);
}