public static bool TryParseFileProperties(
IEnumerable <string> values,
string optionName,
out FilterPredicate <DateTime>?creationTimePredicate,
out FilterPredicate <DateTime>?modifiedTimePredicate,
out FilterPredicate <long>?sizePredicate)
{
creationTimePredicate = null;
modifiedTimePredicate = null;
sizePredicate = null;
foreach (string value in values)
{
Expression? expression = null;
OptionValue?optionValue = null;
try
{
expression = Expression.Parse(value);
if (OptionValues.FileProperty_CreationTime.IsKeyOrShortKey(expression.Identifier))
{
optionValue = OptionValues.FileProperty_CreationTime;
creationTimePredicate = new FilterPredicate <DateTime>(
expression,
PredicateHelpers.GetDateTimePredicate(expression));
}
else if (OptionValues.FileProperty_ModifiedTime.IsKeyOrShortKey(expression.Identifier))
{
optionValue = OptionValues.FileProperty_ModifiedTime;
modifiedTimePredicate = new FilterPredicate <DateTime>(
expression,
PredicateHelpers.GetDateTimePredicate(expression));
}
else if (OptionValues.FileProperty_Size.IsKeyOrShortKey(expression.Identifier))
{
optionValue = OptionValues.FileProperty_Size;
if (expression.Kind == ExpressionKind.DecrementExpression)
{
WriteOptionError(value, optionName, HelpProvider.GetExpressionsText(" ", includeDate: false));
return(false);
}
sizePredicate = new FilterPredicate <long>(expression, PredicateHelpers.GetLongPredicate(expression));
}
else
{
WriteOptionError(value, optionName, OptionValueProviders.FilePropertiesProvider);
return(false);
}
}
catch (ArgumentException)
{
if (expression != null &&
optionValue != null)
{
WriteOptionValueError(
expression.Value,
optionValue,
HelpProvider.GetExpressionsText(
" ",
includeDate: optionValue != OptionValues.FileProperty_Size));
}
else
{
WriteOptionError(value, optionName, HelpProvider.GetExpressionsText(" "));
}
return(false);
}
}
return(true);
}
public static bool TryParse(
IEnumerable <string> values,
string optionName,
OptionValueProvider provider,
out Filter?filter,
out FileNamePart namePart,
bool allowNull = false,
OptionValueProvider?namePartProvider = null,
FileNamePart defaultNamePart = FileNamePart.Name,
PatternOptions includedPatternOptions = PatternOptions.None)
{
filter = null;
namePart = defaultNamePart;
string?pattern = values.FirstOrDefault();
if (pattern == null)
{
if (allowNull)
{
return(true);
}
else
{
throw new InvalidOperationException($"Option '{OptionNames.GetHelpText(optionName)}' is required.");
}
}
TimeSpan matchTimeout = Regex.InfiniteMatchTimeout;
string? groupName = null;
string? separator = null;
Func <string, bool>?predicate = null;
List <string>?options = null;
foreach (string option in values.Skip(1))
{
int index = option.IndexOfAny(_equalsOrLessThanOrGreaterThanChars);
if (index != -1)
{
string key = option.Substring(0, index);
if (!provider.ContainsKeyOrShortKey(key))
{
WriteOptionError(option, optionName, provider);
return(false);
}
string value = option.Substring(index + 1);
if (OptionValues.Group.IsKeyOrShortKey(key))
{
groupName = value;
continue;
}
else if (OptionValues.ListSeparator.IsKeyOrShortKey(key))
{
separator = value;
continue;
}
else if (OptionValues.Part.IsKeyOrShortKey(key))
{
if (!TryParseAsEnum(
value,
out namePart,
provider: namePartProvider ?? OptionValueProviders.NamePartKindProvider))
{
WriteOptionValueError(
value,
OptionValues.Part,
namePartProvider ?? OptionValueProviders.NamePartKindProvider);
return(false);
}
continue;
}
else if (OptionValues.Timeout.IsKeyOrShortKey(key))
{
if (!TryParseMatchTimeout(value, out matchTimeout))
{
WriteOptionValueError(value, OptionValues.Timeout);
return(false);
}
continue;
}
}
if (Expression.TryParse(option, out Expression? expression))
{
if (OptionValues.Length.IsKeyOrShortKey(expression.Identifier) &&
provider.ContainsKeyOrShortKey(expression.Identifier))
{
try
{
predicate = PredicateHelpers.GetLengthPredicate(expression);
continue;
}
catch (ArgumentException)
{
WriteOptionValueError(
expression.Value,
OptionValues.Length,
HelpProvider.GetExpressionsText(" ", includeDate: false));
return(false);
}
}
else
{
WriteOptionError(option, optionName, provider);
return(false);
}
}
(options ??= new List <string>()).Add(option);
}
if (!TryParseRegexOptions(
options,
optionName,
out RegexOptions regexOptions,
out PatternOptions patternOptions,
includedPatternOptions,
provider))
{
return(false);
}
switch (patternOptions & (PatternOptions.WholeWord | PatternOptions.WholeLine))
{
case PatternOptions.None:
case PatternOptions.WholeWord:
case PatternOptions.WholeLine:
{
break;
}
default:
{
string helpValue = OptionValueProviders.PatternOptionsProvider
.GetValue(nameof(PatternOptions.WholeWord)).HelpValue;
string helpValue2 = OptionValueProviders.PatternOptionsProvider
.GetValue(nameof(PatternOptions.WholeLine)).HelpValue;
WriteError($"Values '{helpValue}' and '{helpValue2}' cannot be combined.");
return(false);
}
}
if ((patternOptions & PatternOptions.FromFile) != 0 &&
!FileSystemHelpers.TryReadAllText(pattern, out pattern, ex => WriteError(ex)))
{
return(false);
}
pattern = BuildPattern(pattern, patternOptions, separator);
if (pattern.Length == 0)
{
throw new InvalidOperationException(
$"Option '{OptionNames.GetHelpText(optionName)}' is invalid: pattern cannot be empty.");
}
Regex?regex = null;
try
{
regex = new Regex(pattern, regexOptions, matchTimeout);
}
catch (ArgumentException ex)
{
WriteError(ex, $"Could not parse regular expression: {ex.Message}");
return(false);
}
int groupIndex = -1;
if (groupName != null)
{
groupIndex = regex.GroupNumberFromName(groupName);
if (groupIndex == -1)
{
string message = $"Group '{groupName}' does not exist.";
string[] groupNames = regex.GetGroupNames();
if (groupNames.Length > 1)
{
message += " Existing group names: "
+ $"{TextHelpers.Join(", ", " and ", groupNames.Where(f => f != "0"))}.";
}
WriteError(message);
return(false);
}
}
filter = new Filter(
regex,
isNegative: (patternOptions & PatternOptions.Negative) != 0,
groupNumber: groupIndex,
predicate: predicate);
return(true);
}