Included TransformerKit for easier NSValueTransformer generation

Date picking for expiry dates now works

MacPass/MPValueTransformerHelper.m

@@ -0,0 +1,46 @@
+//
+//  MPValueTransformerHelper.m
+//  MacPass
+//
+//  Created by Michael Starke on 17/03/14.
+//  Copyright (c) 2014 HicknHack Software GmbH. All rights reserved.
+//
+
+#import "MPValueTransformerHelper.h"
+#import "NSValueTransformer+TransformerKit.h"
+
+NSString *const MPStripLineBreaksTransformerName = @"com.hicknhack.macpass.MPStripLineBreaksTransformerName";
+NSString *const MPExpiryDateValueTransformer = @"com.hicknhack.macpass.kMPExpiryDateValueTransformer";
+
+@implementation MPValueTransformerHelper
+
++ (void)registerValueTransformer {
+  [NSValueTransformer registerValueTransformerWithName:MPStripLineBreaksTransformerName
+                                 transformedValueClass:[NSString class]
+                    returningTransformedValueWithBlock:^id(id value) {
+                      if(![value isKindOfClass:[NSString class]]) {
+                        return @"";
+                      }
+                      NSArray *elements = [value componentsSeparatedByCharactersInSet:[NSCharacterSet newlineCharacterSet]];
+                      return [elements componentsJoinedByString:@" "];
+                    }];
+  
+  
+  [NSValueTransformer registerValueTransformerWithName:MPExpiryDateValueTransformer
+                                 transformedValueClass:[NSString class]
+                    returningTransformedValueWithBlock:^id(id value) {
+                      if(![value isKindOfClass:[NSDate class]]) {
+                        return @""; // Wrong input
+                      }
+                      static NSDateFormatter *formatter;
+                      if(!formatter) {
+                        formatter = [[NSDateFormatter alloc] init];
+                        [formatter setDateStyle:NSDateFormatterFullStyle];
+                        [formatter setTimeStyle:NSDateFormatterNoStyle];
+                      }
+                      NSString *template = NSLocalizedString(@"EXPIRES_AT_DATE_%@", "");
+                      return [[NSString alloc] initWithFormat:template, [formatter stringFromDate:value]];
+                    }];
+}
+
+@end