Refactor JSBridge to simplify adding new methods. Add log(message) and a stub for fileExistsInMod(file,mod).

OpenRA.Launcher.Mac/JSBridge.m

@@ -9,29 +9,71 @@
 #import "JSBridge.h"
 #import "Controller.h"
 
-@implementation JSBridge
+static JSBridge *SharedInstance;
 
--(id)initWithController:(Controller *)aController
+@implementation JSBridge
+@synthesize methods;
+
++ (JSBridge *)sharedInstance
+{
+	if (SharedInstance == nil)
+		SharedInstance = [[JSBridge alloc] init];
+	
+	return SharedInstance;
+}
+
++ (NSString *)webScriptNameForSelector:(SEL)sel
+{
+	return [[[JSBridge sharedInstance] methods] objectForKey:NSStringFromSelector(sel)];
+}
+
++ (BOOL)isSelectorExcludedFromWebScript:(SEL)sel
+{ 
+	return [[[JSBridge sharedInstance] methods] objectForKey:NSStringFromSelector(sel)] == nil;
+}
+
+-(id)init
 {
 	self = [super init];
 	if (self != nil)
 	{
-		controller = [aController retain];
+		methods = [[NSDictionary dictionaryWithObjectsAndKeys:
+						@"launchCurrentMod", NSStringFromSelector(@selector(launchCurrentMod)),
+						@"log", NSStringFromSelector(@selector(log:)),
+						@"fileExistsInMod", NSStringFromSelector(@selector(fileExists:inMod:)),
+					nil] retain];
 	}
 	return self;
 }
 
-- (void) dealloc
+- (void)setController:(Controller *)aController
+{
+	controller = [aController retain];
+}
+
+- (void)dealloc
 {
 	[controller release]; controller = nil;
 	[super dealloc];
 }
 
+#pragma mark JS methods
+
 - (void)launchCurrentMod
 {
 	NSLog(@"launchcurrent");
 	[controller launchGame];
 }
 
-+ (BOOL)isSelectorExcludedFromWebScript:(SEL)aSelector { return NO; }
+- (void)log:(NSString *)message
+{
+	NSLog(@"js: %@",message);
+}
+
+- (BOOL)fileExists:(NSString *)aFile inMod:(NSString *)aMod
+{
+	NSLog(@"File %@ exists in mod %@",aFile, aMod);
+	return NO;
+}
+
 @end