public object?Resolve(Type?type)
{
if (type == null)
{
throw new CommandRuntimeException("Cannot resolve null type.");
}
try
{
if (_resolver != null)
{
var obj = _resolver.Resolve(type);
if (obj == null)
{
throw CommandRuntimeException.CouldNotResolveType(type);
}
return(obj);
}
// Fall back to use the activator.
return(Activator.CreateInstance(type));
}
catch (CommandAppException)
{
throw;
}
catch (Exception ex)
{
throw CommandRuntimeException.CouldNotResolveType(type, ex);
}
}
public static ConfiguredCommand FromType <TCommand>(string name, bool isDefaultCommand = false)
where TCommand : class, ICommand
{
var settingsType = ConfigurationHelper.GetSettingsType(typeof(TCommand));
if (settingsType == null)
{
throw CommandRuntimeException.CouldNotGetSettingsType(typeof(TCommand));
}
return(new ConfiguredCommand(name, typeof(TCommand), settingsType, null, isDefaultCommand));
}
public static CommandSettings CreateSettings(CommandValueLookup lookup, ConstructorInfo constructor, ITypeResolver resolver)
{
if (constructor.DeclaringType == null)
{
throw new InvalidOperationException("Cannot create settings since constructor have no declaring type.");
}
var parameters = new List <object?>();
var mapped = new HashSet <Guid>();
foreach (var parameter in constructor.GetParameters())
{
if (lookup.TryGetParameterWithName(parameter.Name, out var result))
{
parameters.Add(result.Value);
mapped.Add(result.Parameter.Id);
}
else
{
var value = resolver.Resolve(parameter.ParameterType);
if (value == null)
{
throw CommandRuntimeException.CouldNotResolveType(parameter.ParameterType);
}
parameters.Add(value);
}
}
// Create the settings.
if (!(Activator.CreateInstance(constructor.DeclaringType, parameters.ToArray()) is CommandSettings settings))
{
throw new InvalidOperationException("Could not create settings");
}
// Try to do property injection for parameters that wasn't injected.
foreach (var(parameter, value) in lookup)
{
if (!mapped.Contains(parameter.Id) && parameter.Property.SetMethod != null)
{
parameter.Property.SetValue(settings, value);
}
}
return(settings);
}
public static CommandSettings CreateSettings(CommandValueLookup lookup, Type settingsType, ITypeResolver resolver)
{
var settings = CreateSettings(resolver, settingsType);
foreach (var(parameter, value) in lookup)
{
parameter.Property.SetValue(settings, value);
}
// Validate the settings.
var validationResult = settings.Validate();
if (!validationResult.Successful)
{
throw CommandRuntimeException.ValidationFailed(validationResult);
}
return(settings);
}
public static void ValidateParameter(CommandParameter parameter, CommandValueLookup settings)
{
var assignedValue = settings.GetValue(parameter);
foreach (var validator in parameter.Validators)
{
var validationResult = validator.Validate(parameter, assignedValue);
if (!validationResult.Successful)
{
// If there is a error message specified in the parameter validator attribute,
// then use that one, otherwise use the validation result.
var result = string.IsNullOrWhiteSpace(validator.ErrorMessage)
? validationResult
: ValidationResult.Error(validator.ErrorMessage);
throw CommandRuntimeException.ValidationFailed(result);
}
}
}
public static void ValidateRequiredParameters(CommandTree?tree)
{
var node = tree?.GetRootCommand();
while (node != null)
{
foreach (var parameter in node.Unmapped)
{
if (parameter.Required)
{
switch (parameter)
{
case CommandArgument argument:
throw CommandRuntimeException.MissingRequiredArgument(node, argument);
}
}
}
node = node.Next;
}
}
private static Task <int> Execute(
CommandTree leaf,
CommandTree tree,
CommandContext context,
ITypeResolver resolver,
IConfiguration configuration)
{
// Bind the command tree against the settings.
var settings = CommandBinder.Bind(tree, leaf.Command.SettingsType, resolver);
configuration.Settings.Interceptor?.Intercept(context, settings);
// Create and validate the command.
var command = leaf.CreateCommand(resolver);
var validationResult = command.Validate(context, settings);
if (!validationResult.Successful)
{
throw CommandRuntimeException.ValidationFailed(validationResult);
}
// Execute the command.
return(command.Execute(context, settings));
}
public static CommandValueLookup GetParameterValues(CommandTree?tree, ITypeResolver resolver)
{
var lookup = new CommandValueLookup();
var binder = new CommandValueBinder(lookup);
CommandValidator.ValidateRequiredParameters(tree);
while (tree != null)
{
// Process unmapped parameters.
foreach (var parameter in tree.Unmapped)
{
if (parameter.IsFlagValue())
{
// Set the flag value to an empty, not set instance.
var instance = Activator.CreateInstance(parameter.ParameterType);
lookup.SetValue(parameter, instance);
}
else
{
// Is this an option with a default value?
if (parameter.DefaultValue != null)
{
var value = parameter.DefaultValue?.Value;
// Need to convert the default value?
if (value != null && value.GetType() != parameter.ParameterType)
{
var converter = GetConverter(lookup, binder, resolver, parameter);
if (converter != null)
{
value = converter.ConvertFrom(value);
}
}
binder.Bind(parameter, resolver, value);
CommandValidator.ValidateParameter(parameter, lookup);
}
}
}
// Process mapped parameters.
foreach (var mapped in tree.Mapped)
{
if (mapped.Parameter.WantRawValue)
{
// Just try to assign the raw value.
binder.Bind(mapped.Parameter, resolver, mapped.Value);
}
else
{
var converter = GetConverter(lookup, binder, resolver, mapped.Parameter);
if (converter == null)
{
throw CommandRuntimeException.NoConverterFound(mapped.Parameter);
}
if (mapped.Parameter.IsFlagValue() && mapped.Value == null)
{
if (mapped.Parameter is CommandOption option && option.DefaultValue != null)
{
// Set the default value.
binder.Bind(mapped.Parameter, resolver, option.DefaultValue?.Value);
}
else
{
// Set the flag but not the value.
binder.Bind(mapped.Parameter, resolver, null);
}
}
