cappuccino/Tools/XcodeCapp/TNXCodeCapp.m

/*
 * This file is a part of program XcodeCapp
 * Copyright (C) 2011  Antoine Mercadal (<primalmotion@archipelproject.org>)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#import "TNXCodeCapp.h"
#include "macros.h"

NSString * const XCCDidPopulateProjectNotification = @"XCCDidPopulateProjectNotification";
NSString * const XCCConversionStartNotification = @"XCCConversionStartNotification";
NSString * const XCCConversionStopNotification = @"XCCConversionStopNotification";
NSString * const XCCListeningStartNotification = @"XCCListeningStartNotification";


@implementation TNXCodeCapp

@synthesize delegate;
@synthesize errorList;
@synthesize XCodeSupportProject;
@synthesize currentProjectURL;
@synthesize currentProjectName;
@synthesize supportsFileBasedListening;
@synthesize reactToInodeModification;
@synthesize currentAPIMode;
@synthesize isListening;
@synthesize supportFileLevelAPI;
@synthesize isUsingFileLevelAPI;

#pragma mark -
#pragma mark Initialization

/*!
 Initialize the AppController
 */
- (id)init
{
    self = [super init];
    
    if (self)
    {
        errorList = [NSMutableArray arrayWithCapacity:10];
        fm = [NSFileManager defaultManager];
        ignoredFilePaths = [NSMutableSet new];
        parserPath = [[NSBundle mainBundle] pathForResource:@"parser" ofType:@"j"];
        lastEventId = [[NSUserDefaults standardUserDefaults] objectForKey:@"lastEventId"];
        appStartedTimestamp = [NSDate date];
        
        [self setIsListening:NO];
        [self setIsUsingFileLevelAPI:NO];

        SInt32 versionMajor = 0;
        SInt32 versionMinor = 0;
        Gestalt(gestaltSystemVersionMajor, &versionMajor);
        Gestalt(gestaltSystemVersionMinor, &versionMinor);
        
        [self setSupportFileLevelAPI:versionMajor >= 10 && versionMinor >= 7];
        // Uncomment to simulate 10.6 mode
        //[self setSupportFileLevelAPI:NO];
        
        [self configure];

        if([fm fileExistsAtPath:[@"~/.bash_profile" stringByExpandingTildeInPath]])
            profilePath = [@"source ~/.bash_profile" stringByExpandingTildeInPath];
        else if([fm fileExistsAtPath:[@"~/.profile" stringByExpandingTildeInPath]])
            profilePath = [@"source ~/.profile" stringByExpandingTildeInPath];
        else if([fm fileExistsAtPath:[@"~/.bashrc" stringByExpandingTildeInPath]])
            profilePath = [@"source ~/.bashrc" stringByExpandingTildeInPath];
        else if([fm fileExistsAtPath:[@"~/.zshrc" stringByExpandingTildeInPath]])
            profilePath = [@"source ~/.zshrc" stringByExpandingTildeInPath];
        else
        {
            NSAlert *alert = [NSAlert alertWithMessageText:@"Cannot find any valid profile file."
                                             defaultButton:@"OK"
                                           alternateButton:nil
                                               otherButton:nil
                                 informativeTextWithFormat:@"Neither ~/.bash_profile, ~/.profile, ~/.bashrc nor ~/.zshrc can be found.\n\nWithout this XcodeCapp cannot locate nib2cib.\n\nIf you notice any errors or strange behaviour, please look at the system log for messages and open a ticket."];
            [alert runModal];
            profilePath = @"";
        }
    }
    
    return self;
}

- (void)start
{        
    if (![[NSUserDefaults standardUserDefaults] boolForKey:@"XCCReopenLastProject"])
        return;

    NSString *lastOpenedPath = [[NSUserDefaults standardUserDefaults] objectForKey:@"LastOpenedPath"];
    
    if (lastOpenedPath)
    {
        if ([fm fileExistsAtPath:lastOpenedPath])
        {            
            [self listenProjectAtPath:[NSString stringWithFormat:@"%@/", lastOpenedPath]];
        }
        else
        {
            [[NSUserDefaults standardUserDefaults] removeObjectForKey:@"LastOpenedPath"];
        }
    }
}

/*!
 Initializes the FSEvent stream
 @param aPath the path of the folder to listen
 */
- (void)initializeEventStreamWithPath:(NSString*)aPath
{
    NSArray *pathsToWatch = [NSArray arrayWithObject:aPath];
    void *appPointer = (void *)self;
    FSEventStreamContext context = {0, appPointer, NULL, NULL, NULL};
    NSTimeInterval latency = 2.0;
    FSEventStreamCreateFlags flags = 0;
    
    if (stream != NULL)
        free(stream);
    
    if (supportsFileBasedListening)
    {
        DLog(@"Initializing the FSEventStream at file level (clean)");
        flags = kFSEventStreamCreateFlagUseCFTypes | kFSEventStreamCreateFlagNoDefer | 0x00000010;
    }
    else
    {
        NSLog(@"Initializing the FSEventStream at folder level (dirty)");
        flags = kFSEventStreamCreateFlagUseCFTypes;
    }
    
    stream = FSEventStreamCreate(NULL, &fsevents_callback, &context, (CFArrayRef) pathsToWatch,
                                 [lastEventId unsignedLongLongValue], (CFAbsoluteTime) latency, flags);
    
    FSEventStreamScheduleWithRunLoop(stream, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);
    FSEventStreamStart(stream);
    [self setIsListening:YES];
}


#pragma mark -
#pragma mark Utilities

/*!
 Stop listening the FSEvent stream if active
 */
- (void)stopEventStream
{
    if (stream)
    {
        FSEventStreamStop(stream);
        FSEventStreamInvalidate(stream);
        stream = nil;
    }

    [self setIsListening:NO];
}

/*!
 Stops and clear the worker
 */
- (void)clear
{
    currentProjectURL = nil;
    currentProjectName = nil;
    [ignoredFilePaths removeAllObjects];
    [self stopEventStream];
}

/*!
 Choose the API mode according to default
 */
- (void)configure
{
    if (![self supportFileLevelAPI])
    {
        DLog(@"System doesn't support file level API");
        [[NSUserDefaults standardUserDefaults] setObject:[NSNumber numberWithInt:2] forKey:@"XCCAPIMode"];
    }

    switch ([[NSUserDefaults standardUserDefaults] integerForKey:@"XCCAPIMode"])
    {
        case 0:
            supportsFileBasedListening = [self supportFileLevelAPI] ? YES : NO;
            break;
        case 1:
            supportsFileBasedListening = YES;
            break;
        case 2:
            supportsFileBasedListening = NO;
            break;
    }

    if (supportsFileBasedListening)
    {
        DLog(@"using 10.7+ mode listening (clean)");

        [self setCurrentAPIMode:@"File level (Lion)"];
        [self setIsUsingFileLevelAPI:YES];
        reactToInodeModification = [[NSUserDefaults standardUserDefaults] boolForKey:@"XCCReactMode"];
    }
    else
    {
        DLog(@"using 10.6 mode listening (dirty)");
        reactToInodeModification = NO;
        [self setCurrentAPIMode:@"Folder level (Snow Leopard)"];
        [self setIsUsingFileLevelAPI:NO];
    }
}

/*!
 Update the last event ID. We use a method because
 This is called from outside the class, in the FSEvent callback
 @param eventId the current event ID value
 */
- (void)updateLastEventId:(uint64_t)eventId
{
    lastEventId = [NSNumber numberWithUnsignedLongLong:eventId];
    [[NSUserDefaults standardUserDefaults] setObject:lastEventId forKey:@"lastEventId"];
    [[NSUserDefaults standardUserDefaults] synchronize];
}

/*!
 Run a NSTask with the given arguments
 @param arguments NSArray containing the NSTask arguments
 @return NSarray containing the return code (int) and the eventual response (string)
 */
- (NSArray *)runTask:(NSArray *)arguments
{
    NSTask *task;
    NSData *stdOut;
    NSString *response;
    NSNumber *status;
    
    task = [[NSTask alloc] init];
    
    [task setLaunchPath: @"/bin/bash"];
    [task setArguments: arguments];
    [task setStandardOutput:[NSPipe pipe]];
    [task launch];
    [task waitUntilExit];
    
    stdOut = [[[task standardOutput] fileHandleForReading] availableData];
    response = [[NSString alloc] initWithData:stdOut encoding:NSUTF8StringEncoding];
    status = [NSNumber numberWithInt:[task terminationStatus]];
    
    return [NSArray arrayWithObjects:status, response, nil];
}

/*!
 Handle a file modification. If it's a .J or XIB or NIB, it will
 perform the according conversion. If it's .xcodecapp-ignore, it will
 update the list of ignored files.
 @param fullPath the full path of the modified file
 @param shouldNotify if YES, Growl notifications will be displayed
 */
- (void)handleFileModification:(NSString*)fullPath notify:(BOOL)shouldNotify
{
    if ([self isPathMatchingIgnoredPaths:fullPath] || ![fm fileExistsAtPath:fullPath])
        return;
    
    DLog(@"Parsing modified file: %@", fullPath);
    
    NSArray *arguments = nil;
    NSString *successTitle = nil;
    NSString *successMsg = nil;
    NSString *response = nil;
    NSNumber *status = [NSNumber numberWithInt:0];
    NSString *splitPath = [fullPath substringFromIndex:[[currentProjectURL path] length] + 1];
    NSString *shadowPath = [[self shadowURLForSourceURL:[NSURL URLWithString:[fullPath stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]] path];
    
    DLog(@"Shadow path: %@", shadowPath);
    
    if ([self isXIBFile:fullPath] || [self isObjJFile:fullPath] || [self isXCCIgnoreFile:fullPath])
    {
        [[NSNotificationCenter defaultCenter] postNotificationName:XCCConversionStartNotification object:self];
        
        if ([self isXIBFile:fullPath])
        {
            arguments = [NSArray arrayWithObjects: @"-c", [NSString stringWithFormat:@"(%@; nib2cib '%@';) 2>&1", profilePath, fullPath],@"",nil];
            successTitle = @"XIB converted";
            successMsg = splitPath;
        }
        else if ([self isObjJFile:fullPath])
        {
            arguments = [NSArray arrayWithObjects: @"-c", [NSString stringWithFormat:@"(%@; objj '%@' '%@' '%@';) 2>&1", profilePath, parserPath, fullPath, shadowPath],@"",nil];
            successTitle = @"Objective-J source processed";
            successMsg = splitPath;
        }
        else if ([self isXCCIgnoreFile:fullPath])
        {
            [self computeIgnoredPaths];
            successTitle = @".xcodecapp-ignore processed";
            successMsg = @"Ignored files list updated";
            arguments = nil;
        }
        
        // Run the task and get the response if needed
        if (arguments)
        {
            DLog(@"Running task...");
            NSArray *statusInfo = [self runTask:arguments];
            
            status = [statusInfo objectAtIndex:0];
            response = [statusInfo objectAtIndex:1];
            
            DLog(@"Task result/response: %@/%@", status, response);
        }
        
        
        if ([status intValue] == 0 && shouldNotify)
        {
            [delegate performSelector:@selector(growlWithTitle:message:) withObject:successTitle withObject:successMsg];
        }
        else if (![status intValue] == 0)
        {
            if (response)
                [errorList addObject:response];
            
            [delegate performSelector:@selector(growlWithTitle:message:) withObject:@"Error processing file" withObject:splitPath];
        }
        
        [[NSNotificationCenter defaultCenter] postNotificationName:XCCConversionStopNotification object:self];
        DLog(@"Processed: %@", fullPath);
    }
}

/*!
 Handle a file deletion. If it's a .J, it will
 remove the shadowed .h file. If it's .xcodecapp-ignore
 it will reset the list of ignored files.
 @param fullPath the full path of the modified file
 @param shouldNotify if YES, Growl notifications will be displayed
 */
- (void)handleFileRemoval:(NSString*)fullPath
{
    if ([self isPathMatchingIgnoredPaths:fullPath] || [fm fileExistsAtPath:fullPath])
        return;
    
    if ([self isObjJFile:fullPath])
    {
        NSString *shadowPath = [[self shadowURLForSourceURL:[NSURL URLWithString:[fullPath stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]] path];
        [fm removeItemAtPath:shadowPath error:nil];
        DLog(@"Removing shadow file: %@", shadowPath);
    }
    else if ([self isXCCIgnoreFile:fullPath])
    {
        [self computeIgnoredPaths];
    }
}

/*!
 Check if given full path is Objective-J file
 @param path the path to check
 @return YES or NO
 */
- (BOOL)isObjJFile:(NSString *)path
{
    return [[[path pathExtension] uppercaseString] isEqual:@"J"];
}

/*!
 Check if given full path is XIB or NIB file
 @param path the path to check
 @return YES or NO
 */
- (BOOL)isXIBFile:(NSString *)path
{
    path = [[path pathExtension] uppercaseString];
    return  [path isEqual:@"XIB"] || [path isEqual:@"NIB"];
}

/*!
 Check if given full path is the .xcodecapp-ignore file
 @param path the path to check
 @return YES or NO
 */
- (BOOL)isXCCIgnoreFile:(NSString *)path
{
    path = [path lastPathComponent];
    return [path isEqual:@".xcodecapp-ignore"];
}


/*!
 Check if .xCodeSupport needs to be initialized.
 If not needed, check that all J files are mirrored. If no,
 then launch conversion for missing mirrored h files
 @return YES or NO
 */
- (BOOL)prepareXCodeSupportProject
{
    XCodeSupportProjectName    = [NSString stringWithFormat:@"%@.xcodeproj/", currentProjectName];
    XCodeTemplatePBXPath       = [[NSBundle mainBundle] pathForResource:@"project.pbxproj" ofType:@"sample"];
    XCodeSupportFolder         = [NSURL URLWithString:@".xCodeSupport/" relativeToURL:currentProjectURL];
    XCodeSupportProject        = [NSURL URLWithString:XCodeSupportProjectName relativeToURL:XCodeSupportFolder];
    XCodeSupportProjectSources = [NSURL URLWithString:@"Sources/" relativeToURL:XCodeSupportFolder];
    XCodeSupportPBXPath        = [NSString stringWithFormat:@"%@/project.pbxproj", [XCodeSupportProject path]];
    
    //[fm removeItemAtURL:XCodeSupportFolder error:nil];
    
    // create the template project if it doesn't exist
    if (![fm fileExistsAtPath:[XCodeSupportFolder path]])
    {
        NSLog(@"Xcode support folder created at: %@", [XCodeSupportProject path]);
        [fm createDirectoryAtPath:[XCodeSupportProject path] withIntermediateDirectories:YES attributes:nil error:nil];
        
        DLog(@"Copying project.pbxproj from %@ to %@", XCodeTemplatePBXPath, [XCodeSupportProject path]);
        [fm copyItemAtPath:XCodeTemplatePBXPath toPath:XCodeSupportPBXPath error:nil];
        
        DLog(@"Reading the content of the project.pbxproj");
        NSMutableString *PBXContent = [NSMutableString stringWithContentsOfFile:XCodeSupportPBXPath encoding:NSUTF8StringEncoding error:nil];
        [PBXContent replaceOccurrencesOfString:@"${CappuccinoProjectName}"
                                    withString:currentProjectName
                                       options:NSCaseInsensitiveSearch
                                         range:NSMakeRange(0, [PBXContent length])];
        [PBXContent replaceOccurrencesOfString:@"${CappuccinoProjectRelativePath}"
                                    withString:@".."
                                       options:NSCaseInsensitiveSearch
                                         range:NSMakeRange(0, [PBXContent length])];
        
        [PBXContent writeToFile:XCodeSupportPBXPath atomically:YES encoding:NSUTF8StringEncoding error:nil];
        DLog(@"PBX file adapted to the project");
        
        DLog(@"Creating source folder");
        [fm createDirectoryAtPath:[XCodeSupportProjectSources path] withIntermediateDirectories:YES attributes:nil error:nil];
        
        [NSThread detachNewThreadSelector:@selector(populateXCodeProject:)toTarget:self withObject:nil];
        return NO;
    }

    return YES;
}

/*!
 Initialize the creation of the .xCodeSupport project. This
 Operation is threaded
 @param arguments Thread arguments (not used)
 */
- (void)populateXCodeProject:(id)arguments
{
    [delegate performSelector:@selector(growlWithTitle:message:) withObject:@"Loading project" withObject:[currentProjectURL path]];
    
    //[self handleFileModification:[NSString stringWithFormat:@"%@", [currentProjectURL path]] notify:NO];
    NSArray *subdpaths = [fm subpathsAtPath:[currentProjectURL path]];
    
    for (NSString *p in subdpaths)
    {
        NSString *filePath = [NSString stringWithFormat:@"%@/%@", [currentProjectURL path], p];
        DLog(@"Original import of %@", filePath);
        [self handleFileModification:filePath notify:NO];
    }

    NSDictionary *info = [NSDictionary dictionaryWithObjectsAndKeys:currentProjectURL, @"URL", nil];
    [[NSNotificationCenter defaultCenter] postNotificationName:XCCDidPopulateProjectNotification object:self userInfo:info];
}

/*!
 Compute the mirorred (shadow) name for a given path
 @param aSourceURL the origin path
 @return NSURL representing the shadow path
 */
- (NSURL *)shadowURLForSourceURL:(NSURL*)aSourceURL
{
    if (!aSourceURL)
        [NSException raise:NSInvalidArgumentException format:@"shadowURLForSourceURL: aSource URL must not be null"];

    NSMutableString *flattenedPath = [NSMutableString stringWithString:[aSourceURL path]];
    NSMutableString *fileName = [NSMutableString stringWithString:[flattenedPath lastPathComponent]];
    [fileName replaceOccurrencesOfString:@"_"
                                   withString:@"-OLDUNDERSCORE-"
                                      options:NSCaseInsensitiveSearch
                                        range:NSMakeRange(0, [fileName length])];

    [flattenedPath replaceOccurrencesOfString:[flattenedPath lastPathComponent]
                                   withString:fileName
                                      options:NSCaseInsensitiveSearch
                                        range:NSMakeRange(0, [flattenedPath length])];

    [flattenedPath replaceOccurrencesOfString:@"/"
                                   withString:@"_"
                                      options:NSCaseInsensitiveSearch
                                        range:NSMakeRange(0, [flattenedPath length])];

    DLog(@"Flattened path: %@", flattenedPath);
    NSString *basename  = [NSString stringWithFormat:@"%@.h", [[flattenedPath stringByDeletingPathExtension] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
    
    return [NSURL URLWithString:basename relativeToURL:XCodeSupportProjectSources];
}

- (NSURL *)sourceURLForShadowName:(NSString *)aString
{
    NSMutableString * unshadowedPath = [NSMutableString stringWithString:aString];

    [unshadowedPath replaceOccurrencesOfString:@"_"
                                    withString:@"/"
                                       options:NSCaseInsensitiveSearch
                                         range:NSMakeRange(0, [unshadowedPath length])];

    [unshadowedPath replaceOccurrencesOfString:@"-OLDUNDERSCORE-"
                                   withString:@"_"
                                      options:NSCaseInsensitiveSearch
                                        range:NSMakeRange(0, [unshadowedPath length])];

    [unshadowedPath replaceOccurrencesOfString:@".h"
                                    withString:@".j"
                                       options:NSCaseInsensitiveSearch
                                         range:NSMakeRange(0, [unshadowedPath length])];

    return [NSURL URLWithString:[NSString stringWithString:unshadowedPath]];
}


/*!
 Compute the ignored paths according to any existing
 .xcodecapp-ignore file
 */
- (void)computeIgnoredPaths
{
    NSString *ignorePath = [NSString stringWithFormat:@"%@/.xcodecapp-ignore", [currentProjectURL path]];
    [ignoredFilePaths removeAllObjects];

    if ([fm fileExistsAtPath:ignorePath])
    {
        NSString *ignoreFileContent = [NSString stringWithContentsOfFile:ignorePath encoding:NSUTF8StringEncoding error:nil];
        NSArray *ignoredPatterns = [ignoreFileContent componentsSeparatedByString:@"\n"];

        for (NSString *pattern in ignoredPatterns)
        {
            if ([pattern length])
                [ignoredFilePaths addObject:pattern];
        }
    }
    
    [ignoredFilePaths addObject:@"*.git*"];
    [ignoredFilePaths addObject:@"*.svn*"];
    [ignoredFilePaths addObject:@"*.hg*"];
    [ignoredFilePaths addObject:@"*Frameworks*"];
    [ignoredFilePaths addObject:@"*.xCodeSupport*"];
    [ignoredFilePaths addObject:@"*Build*"];
    
    NSLog(@"Ignoring file paths: %@", ignoredFilePaths);
}

/*!
 Check is given path should be ignored
 @param aPath the path to check
 @return YES if it should be ignored, NO otherwise
 */
- (BOOL)isPathMatchingIgnoredPaths:(NSString*)aPath
{
    BOOL isMatching = NO;
    
    for (NSString *ignoredPath in ignoredFilePaths)
    {
        if ([ignoredPath isEqual:@""])
            continue;
        
        NSMutableString *regexp = [NSMutableString stringWithFormat:@"%@/%@", [currentProjectURL path], ignoredPath];
        [regexp replaceOccurrencesOfString:@"/"
                                withString:@"\\/"
                                   options:NSCaseInsensitiveSearch
                                     range:NSMakeRange(0, [regexp length])];
        
        [regexp replaceOccurrencesOfString:@"."
                                withString:@"\\."
                                   options:NSCaseInsensitiveSearch
                                     range:NSMakeRange(0, [regexp length])];
        
        [regexp replaceOccurrencesOfString:@"*"
                                withString:@".*"
                                   options:NSCaseInsensitiveSearch
                                     range:NSMakeRange(0, [regexp length])];
        
        NSPredicate *regextest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", regexp];
        if ([regextest evaluateWithObject:aPath])
        {
            isMatching = YES;
            
            break;
        }
    }
    
    return isMatching;
}

/*!
 Start all needed processes for listening to a given path
 @param path The folder path to listen to
 */
- (void)listenProjectAtPath:(NSString *)path
{
    NSMutableString *tempName = [NSMutableString stringWithString:[path lastPathComponent]];
    
    currentProjectURL = [NSURL URLWithString:path];
    
    [tempName replaceOccurrencesOfString:@" "
                              withString:@"_"
                                 options:NSCaseInsensitiveSearch
                                   range:NSMakeRange(0, [tempName length])];
    currentProjectName = [NSString stringWithString:tempName];
    
    [self computeIgnoredPaths];
    
    BOOL isProjectReady = [self prepareXCodeSupportProject];
    
    [self initializeEventStreamWithPath:[currentProjectURL path]];
    
    NSDictionary *info = [NSDictionary dictionaryWithObjectsAndKeys:path, @"path", [NSNumber numberWithInt:(isProjectReady) ? 1 : 0], @"ready", nil];
    [[NSNotificationCenter defaultCenter] postNotificationName:XCCListeningStartNotification object:self userInfo:info];
    
    [[NSUserDefaults standardUserDefaults] setObject:[currentProjectURL path] forKey:@"LastOpenedPath"];
}

/*!
 Clean the support folder according to files present in given path
 @param basePath the path of the folder to check
 */
- (void)tidyShadowedFiles:(NSString*)basePath
{
    NSArray *subpaths = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:[XCodeSupportProjectSources path] error:NULL];

    for (NSString *subpath in subpaths)
    {
        NSString *unshadowed = [[self sourceURLForShadowName:subpath] path];
        NSString *shadowFullPath = [NSString stringWithFormat:@"%@/%@", [XCodeSupportProjectSources path], subpath];
        if (![fm fileExistsAtPath:unshadowed])
        {
            DLog(@"cleaning shadow file: %@", subpath);
            [fm removeItemAtPath:shadowFullPath error:nil];
            if (![self supportFileLevelAPI] && [self respondsToSelector:@selector(updateLastModificationDate:forPath:)])
                [self performSelector:@selector(updateLastModificationDate:forPath:) withObject:nil withObject:unshadowed];
        }
    }
}

@end


@implementation TNXCodeCapp (SnowLeopard)

- (void)updateLastModificationDate:(NSDate *)date forPath:(NSString *)path
{
    if (!pathModificationDates)
    {
        pathModificationDates = [[[NSUserDefaults standardUserDefaults] dictionaryForKey:@"pathModificationDates"] mutableCopy];
        
        if (!pathModificationDates)
            pathModificationDates = [NSMutableDictionary new];
    }

    if (date)
        [pathModificationDates setObject:[date retain] forKey:path];
    else
        [pathModificationDates removeObjectForKey:path];

    [[NSUserDefaults standardUserDefaults] setObject:pathModificationDates forKey:@"pathModificationDates"];
}

- (NSDate *)lastModificationDateForPath:(NSString *)path
{
    if (!pathModificationDates)
    {
        pathModificationDates = [[[NSUserDefaults standardUserDefaults] dictionaryForKey:@"pathModificationDates"] mutableCopy];
        
        if (!pathModificationDates)
            pathModificationDates = [NSMutableDictionary new];
    }

    if ([pathModificationDates valueForKey:path] != nil)
        return [pathModificationDates valueForKey:path];
    else
        return appStartedTimestamp;
}

@end