MFError.m

//
//  MFError.m
//  MacFusion2
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
//      http://www.apache.org/licenses/LICENSE-2.0
// 
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#import "MFError.h"
#import "MFConstants.h"

@implementation MFError

+ (MFError *)parameterMissingErrorWithParameterName:(NSString *)parameter {
	return [MFError errorWithDomain:kMFErrorDomain
							   code:kMFErrorCodeMissingParameter
						   userInfo: [NSDictionary dictionaryWithObject:parameter
																 forKey:kMFErrorParameterKey ]];
}


+ (MFError *)invalidParameterValueErrorWithParameterName:(NSString *)parameter value:(id)value description:(NSString *)description {
	NSDictionary* errorDict = [NSDictionary dictionaryWithObjectsAndKeys:
							   parameter, kMFErrorParameterKey,
							   value, kMFErrorValueKey,
							   description, NSLocalizedFailureReasonErrorKey,
							   nil];
	return [MFError errorWithDomain:kMFErrorDomain
							   code:kMFErrorCodeInvalidParameterValue
						   userInfo:errorDict];
}


- (NSString *)localizedDescription {
	NSString *paramName = [[self userInfo] objectForKey: kMFErrorParameterKey];
	NSString *faliureReason = [[self userInfo] objectForKey: NSLocalizedFailureReasonErrorKey];
	if (![[self userInfo] objectForKey: NSLocalizedDescriptionKey ] && paramName) {

		if ([self code] == kMFErrorCodeMissingParameter) {
			return [NSString stringWithFormat: @"Missing required value for %@",paramName ];
		}
		if ([self code] == kMFErrorCodeInvalidParameterValue) {
			return [NSString stringWithFormat: @"Invalid value for %@\n%@",[[self userInfo] objectForKey: kMFErrorParameterKey],faliureReason ? faliureReason : @"" ];
		}
	}
	
	return [super localizedDescription];
}

+ (MFError *)errorWithErrorCode:(NSInteger)code description:(NSString *)description {
	return [MFError errorWithDomain:kMFErrorDomain code:code userInfo: 
			[NSDictionary dictionaryWithObject: description forKey: NSLocalizedDescriptionKey]];
}

@end