More experiments with NSProxy

MacPass/MPEntryProxy.m

@@ -12,6 +12,7 @@
 @interface MPEntryProxy ()
 
 @property (strong) KPKEntry *entry;
+@property (strong) NSMutableDictionary *valueStore;
 
 @end
 
@@ -22,12 +23,34 @@
     @throw [NSException exceptionWithName:NSInvalidArgumentException reason:nil userInfo:nil];
   }
   _entry = entry;
+  _valueStore = [[NSMutableDictionary alloc] init];
   return self;
 }
 
 - (void)forwardInvocation:(NSInvocation *)invocation {
   NSLog(@"forwardInvocation: %@", NSStringFromSelector(invocation.selector));
-  [invocation invokeWithTarget:self.entry];
+  NSString *seletor = NSStringFromSelector(invocation.selector);
+  if([seletor hasPrefix:@"set"]) {
+    NSLog(@"forwardInvocation: setter detected");
+    NSString *property = [seletor substringFromIndex:3].lowercaseString; // lowercase fist letter!!!
+    if(invocation.methodSignature.numberOfArguments == 3) {
+      id value;
+      [invocation getArgument:&value atIndex:2];
+      NSLog(@"forwardInvocation: captured value %@", value);
+      if(value) {
+        self.valueStore[property] = value;
+      }
+      return; // captures getter, just return
+    }
+  }
+  id change = self.valueStore[seletor.lowercaseString];
+  if(change) {
+    NSLog(@"forwardInvocation: hit cached value. Returning cache!");
+    [invocation setReturnValue:&change];
+  }
+  else {
+    [invocation invokeWithTarget:self.entry];
+  }
 }
 
 - (NSMethodSignature *)methodSignatureForSelector:(SEL)sel {