/*
 * Copyright 2007-2010 The OpenRA Developers (see AUTHORS)
 * This file is part of OpenRA, which is free software. It is made 
 * available to you under the terms of the GNU General Public License
 * as published by the Free Software Foundation. For more information,
 * see LICENSE.
 */

#import "JSBridge.h"
#import "Controller.h"

static JSBridge *SharedInstance;

@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)
	{
		methods = [[NSDictionary dictionaryWithObjectsAndKeys:
						@"launchMod", NSStringFromSelector(@selector(launchMod:)),
						@"log", NSStringFromSelector(@selector(log:)),
						@"fileExistsInMod", NSStringFromSelector(@selector(fileExists:inMod:)),
					nil] retain];
	}
	return self;
}

- (void)setController:(Controller *)aController
{
	controller = [aController retain];
}

- (void)dealloc
{
	[controller release]; controller = nil;
	[super dealloc];
}

#pragma mark JS methods

- (BOOL)launchMod:(NSString *)aMod
{
	id mod = [[controller allMods] objectForKey:aMod];
	if (mod == nil)
	{
		NSLog(@"Invalid or unknown mod: %@", aMod);
		return NO;
	}
	
	[controller launchMod:aMod];
	return YES;
}

- (void)log:(NSString *)message
{
	NSLog(@"js: %@",message);
}

- (BOOL)fileExists:(NSString *)aFile inMod:(NSString *)aMod
{
	id mod = [[controller allMods] objectForKey:aMod];
	if (mod == nil)
	{
		NSLog(@"Invalid or unknown mod: %@", aMod);
		return NO;
	}
	
	// Disallow traversing up the directory tree
	id path = [[[mod baseURL] absoluteString]
			   stringByAppendingPathComponent:[aFile stringByReplacingOccurrencesOfString:@"../"
																			   withString:@""]];
	
	return [[NSFileManager defaultManager] fileExistsAtPath:path];
}

@end