/******************************************************************************
 * $Id$
 *
 * Copyright (c) 2006-2007 Transmission authors and contributors
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *****************************************************************************/

#import "Torrent.h"
#import "NSStringAdditions.h"

static int static_lastid = 0;

@interface Torrent (Private)

- (id) initWithHash: (NSString *) hashString path: (NSString *) path lib: (tr_handle_t *) lib
        publicTorrent: (NSNumber *) publicTorrent
        downloadFolder: (NSString *) downloadFolder
        useIncompleteFolder: (NSNumber *) useIncompleteFolder incompleteFolder: (NSString *) incompleteFolder
        dateAdded: (NSDate *) dateAdded dateCompleted: (NSDate *) dateCompleted
        dateActivity: (NSDate *) dateActivity
        ratioSetting: (NSNumber *) ratioSetting ratioLimit: (NSNumber *) ratioLimit
		pex: (NSNumber *) pex
        waitToStart: (NSNumber *) waitToStart orderValue: (NSNumber *) orderValue;

- (BOOL) shouldUseIncompleteFolderForName: (NSString *) name;
- (void) updateDownloadFolder;

- (void) createFileList;
- (void) insertPath: (NSMutableArray *) components forSiblings: (NSMutableArray *) siblings
            withParent: (NSMutableDictionary *) parent previousPath: (NSString *) previousPath
            flatList: (NSMutableArray *) flatList fileSize: (uint64_t) size index: (int) index;

- (void) quickPause;
- (void) endQuickPause;

- (void) trashFile: (NSString *) path;

@end

@implementation Torrent

- (id) initWithPath: (NSString *) path location: (NSString *) location deleteTorrentFile: (torrentFileState) torrentDelete
        lib: (tr_handle_t *) lib
{
    self = [self initWithHash: nil path: path lib: lib
            publicTorrent: torrentDelete != TORRENT_FILE_DEFAULT
                            ? [NSNumber numberWithBool: torrentDelete == TORRENT_FILE_SAVE] : nil
            downloadFolder: location
            useIncompleteFolder: nil incompleteFolder: nil
            dateAdded: nil dateCompleted: nil
            dateActivity: nil
            ratioSetting: nil ratioLimit: nil
			pex: nil
            waitToStart: nil orderValue: nil];
    
    if (self)
    {
        if (!fPublicTorrent)
            [self trashFile: path];
    }
    return self;
}

- (id) initWithHistory: (NSDictionary *) history lib: (tr_handle_t *) lib
{
    self = [self initWithHash: [history objectForKey: @"TorrentHash"]
                path: [history objectForKey: @"TorrentPath"] lib: lib
                publicTorrent: [history objectForKey: @"PublicCopy"]
                downloadFolder: [history objectForKey: @"DownloadFolder"]
                useIncompleteFolder: [history objectForKey: @"UseIncompleteFolder"]
                incompleteFolder: [history objectForKey: @"IncompleteFolder"]
                dateAdded: [history objectForKey: @"Date"]
				dateCompleted: [history objectForKey: @"DateCompleted"]
                dateActivity: [history objectForKey: @"DateActivity"]
                ratioSetting: [history objectForKey: @"RatioSetting"]
                ratioLimit: [history objectForKey: @"RatioLimit"]
				pex: [history objectForKey: @"Pex"]
                waitToStart: [history objectForKey: @"WaitToStart"]
                orderValue: [history objectForKey: @"OrderValue"]];
    
    if (self)
    {
        //start transfer
        NSNumber * active;
        if ((active = [history objectForKey: @"Active"]) && [active boolValue])
        {
            fStat = tr_torrentStat(fHandle);
            [self startTransfer];
        }
    }
    return self;
}

- (NSDictionary *) history
{
    NSMutableDictionary * history = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                    [NSNumber numberWithBool: fPublicTorrent], @"PublicCopy",
                    [self hashString], @"TorrentHash",
                    fDownloadFolder, @"DownloadFolder",
                    [NSNumber numberWithBool: fUseIncompleteFolder], @"UseIncompleteFolder",
                    [NSNumber numberWithBool: [self isActive]], @"Active",
                    fDateAdded, @"Date",
                    [NSNumber numberWithInt: fRatioSetting], @"RatioSetting",
                    [NSNumber numberWithFloat: fRatioLimit], @"RatioLimit",
                    [NSNumber numberWithBool: fWaitToStart], @"WaitToStart",
                    [self orderValue], @"OrderValue", nil];
    
    if (fIncompleteFolder)
        [history setObject: fIncompleteFolder forKey: @"IncompleteFolder"];

    if (fPublicTorrent)
        [history setObject: [self publicTorrentLocation] forKey: @"TorrentPath"];
	
	if (![self privateTorrent])
		[history setObject: [NSNumber numberWithBool: fPex] forKey: @"Pex"];
	
	if (fDateCompleted)
		[history setObject: fDateCompleted forKey: @"DateCompleted"];
    
    NSDate * dateActivity = [self dateActivity];
    if (dateActivity)
		[history setObject: dateActivity forKey: @"DateActivity"];
	
    return history;
}

- (void) dealloc
{
    if (fileStat)
        tr_torrentFilesFree(fileStat, [self fileCount]);
    
    [fDownloadFolder release];
    [fIncompleteFolder release];
    
    [fPublicTorrentLocation release];
    
    [fDateAdded release];
    [fDateCompleted release];
    [fDateActivity release];
    
    [fIcon release];
    
    [fProgressString release];
    [fStatusString release];
    [fShortStatusString release];
    [fRemainingTimeString release];
    
    [fFileList release];
    [fFlatFileList release];
    
    [fFileMenu release];
    
    [fQuickPauseDict release];
    
    [super dealloc];
}

- (void) closeTorrent
{
    tr_torrentClose(fHandle);
}

- (void) closeRemoveTorrent
{
    tr_torrentRemoveSaved(fHandle);
    [self closeTorrent];
}

- (void) changeIncompleteDownloadFolder: (NSString *) folder
{
    fUseIncompleteFolder = folder != nil;
    
    [fIncompleteFolder release];
    fIncompleteFolder = fUseIncompleteFolder ? [folder retain] : nil;
    
    [self updateDownloadFolder];
}

- (void) changeDownloadFolder: (NSString *) folder
{
    [fDownloadFolder release];
    fDownloadFolder = [folder retain];
    
    [self updateDownloadFolder];
}

- (NSString *) downloadFolder
{
    return [NSString stringWithUTF8String: tr_torrentGetFolder(fHandle)];
}

- (void) getAvailability: (int8_t *) tab size: (int) size
{
    tr_torrentAvailability(fHandle, tab, size);
}

- (void) getAmountFinished: (float *) tab size: (int) size
{
    tr_torrentAmountFinished(fHandle, tab, size);
}

- (void) update
{
    fStat = tr_torrentStat(fHandle);
    
    //notification when downloading finished
    if (tr_getComplete(fHandle) || tr_getDone(fHandle))
    {
        BOOL canMove = YES;
        
        //move file from incomplete folder to download folder
        if (fUseIncompleteFolder && ![[self downloadFolder] isEqualToString: fDownloadFolder]
            && (canMove = [self alertForMoveFolderAvailable]))
        {
            [self quickPause];
            
            if ([[NSFileManager defaultManager] movePath: [[self downloadFolder] stringByAppendingPathComponent: [self name]]
                                    toPath: [fDownloadFolder stringByAppendingPathComponent: [self name]] handler: nil])
                [self updateDownloadFolder];
            else
                canMove = NO;
            
            [self endQuickPause];
        }
        
        if (!canMove)
        {
            fUseIncompleteFolder = NO;
            
            [fDownloadFolder release];
            fDownloadFolder = fIncompleteFolder;
            fIncompleteFolder = nil;
        }
		
		[fDateCompleted release];
		fDateCompleted = [[NSDate alloc] init];
        
        fStat = tr_torrentStat(fHandle);
        [[NSNotificationCenter defaultCenter] postNotificationName: @"TorrentFinishedDownloading" object: self];
    }
    else if (tr_getIncomplete(fHandle))
        [[NSNotificationCenter defaultCenter] postNotificationName: @"TorrentRestartedDownloading" object: self];
    else;
    
    //check to stop for ratio
    float stopRatio;
    if ([self isSeeding] && (stopRatio = [self actualStopRatio]) != INVALID && [self ratio] >= stopRatio)
    {
        [self stopTransfer];
        fStat = tr_torrentStat(fHandle);
        
        fFinishedSeeding = YES;
        
        [self setRatioSetting: NSOffState];
        [[NSNotificationCenter defaultCenter] postNotificationName: @"TorrentStoppedForRatio" object: self];
    }
	
	NSMutableString * progressString = [[NSMutableString alloc] init],
					* remainingTimeString = [[NSMutableString alloc] init],
					* statusString = [[NSMutableString alloc] init],
					* shortStatusString = [[NSMutableString alloc] init];

    if (![self allDownloaded])
        [progressString appendFormat: NSLocalizedString(@"%@ of %@ (%.2f%%)", "Torrent -> progress string"),
                            [NSString stringForFileSize: [self downloadedValid]],
                            [NSString stringForFileSize: [self size]], 100.0 * [self progress]];
    else if (![self isComplete])
        [progressString appendFormat: NSLocalizedString(@"%@ of %@ (%.2f%%), uploaded %@ (Ratio: %@)",
                "Torrent -> progress string"), [NSString stringForFileSize: [self downloadedValid]],
                [NSString stringForFileSize: [self size]], 100.0 * [self progress],
                [NSString stringForFileSize: [self uploadedTotal]], [NSString stringForRatio: [self ratio]]];
    else
        [progressString appendFormat: NSLocalizedString(@"%@, uploaded %@ (Ratio: %@)", "Torrent -> progress string"),
                [NSString stringForFileSize: [self size]], [NSString stringForFileSize: [self uploadedTotal]],
                [NSString stringForRatio: [self ratio]]];

    BOOL wasChecking = fChecking;
    fChecking = NO;
    switch (fStat->status)
    {
        NSString * tempString;
        
        case TR_STATUS_STOPPED:
            if (fWaitToStart)
            {
                tempString = ![self allDownloaded]
                        ? [NSLocalizedString(@"Waiting to download", "Torrent -> status string") stringByAppendingEllipsis]
                        : [NSLocalizedString(@"Waiting to seed", "Torrent -> status string") stringByAppendingEllipsis];
            }
            else if (fFinishedSeeding)
                tempString = NSLocalizedString(@"Seeding complete", "Torrent -> status string");
            else
                tempString = NSLocalizedString(@"Paused", "Torrent -> status string");
            
            [statusString setString: tempString];
            [shortStatusString setString: tempString];
            
            break;

        case TR_STATUS_CHECK_WAIT:
            tempString = [NSLocalizedString(@"Waiting to check existing data", "Torrent -> status string") stringByAppendingEllipsis];
            
            [statusString setString: tempString];
            [shortStatusString setString: tempString];
            [remainingTimeString setString: tempString];
            
            fChecking = YES;
            
            break;

        case TR_STATUS_CHECK:
            tempString = [NSString stringWithFormat: NSLocalizedString(@"Checking existing data (%.2f%%)",
                                    "Torrent -> status string"), 100.0 * fStat->recheckProgress];
            
            [statusString setString: tempString];
            [shortStatusString setString: tempString];
            [remainingTimeString setString: tempString];
            
            fChecking = YES;
            
            break;

        case TR_STATUS_DOWNLOAD:
            [statusString setString: @""];
            if ([self totalPeersConnected] != 1)
                [statusString appendFormat: NSLocalizedString(@"Downloading from %d of %d peers",
                                                "Torrent -> status string"), [self peersSendingToUs], [self totalPeersConnected]];
            else
                [statusString appendFormat: NSLocalizedString(@"Downloading from %d of 1 peer",
                                                "Torrent -> status string"), [self peersSendingToUs]];
            
            int eta = [self eta];
            if (eta < 0)
            {
                [remainingTimeString setString: NSLocalizedString(@"Unknown", "Torrent -> remaining time")];
                [progressString appendString: NSLocalizedString(@" - remaining time unknown", "Torrent -> progress string")];
            }
            else
            {
                if (eta < 60)
                    [remainingTimeString appendFormat: NSLocalizedString(@"%d sec", "Torrent -> remaining time"), eta];
                else if (eta < 3600) //60 * 60
                    [remainingTimeString appendFormat: NSLocalizedString(@"%d min %d sec", "Torrent -> remaining time"),
                                                            eta / 60, eta % 60];
                else if (eta < 86400) //24 * 60 * 60
                    [remainingTimeString appendFormat: NSLocalizedString(@"%d hr %d min", "Torrent -> remaining time"),
                                                            eta / 3600, (eta / 60) % 60];
                else
                {
					int days = eta / 86400;
                    if (days > 1)
                        [remainingTimeString appendFormat: NSLocalizedString(@"%d days %d hr", "Torrent -> remaining time"),
                                                                days, (eta / 3600) % 24];
                    else
                        [remainingTimeString appendFormat: NSLocalizedString(@"1 day %d hr", "Torrent -> remaining time"),
                                                                (eta / 3600) % 24];
                }
                
                [progressString appendFormat: NSLocalizedString(@" - %@ remaining", "Torrent -> progress string"),
                                                                    remainingTimeString];
            }
            
            break;

        case TR_STATUS_SEED:
        case TR_STATUS_DONE:
            [statusString setString: @""];
            if ([self totalPeersConnected] != 1)
                [statusString appendFormat: NSLocalizedString(@"Seeding to %d of %d peers", "Torrent -> status string"),
                                                [self peersGettingFromUs], [self totalPeersConnected]];
            else
                [statusString appendFormat: NSLocalizedString(@"Seeding to %d of 1 peer", "Torrent -> status string"),
                                                [self peersGettingFromUs]];
            
            break;

        case TR_STATUS_STOPPING:
            tempString = [NSLocalizedString(@"Stopping", "Torrent -> status string") stringByAppendingEllipsis];
        
            [statusString setString: tempString];
            [shortStatusString setString: tempString];
            
            break;
    }
    
    //check for error
    BOOL wasError = fError;
    fError = [self isError];
    
    //check if stalled
    BOOL wasStalled = fStalled;
    fStalled = [self isActive] && [fDefaults boolForKey: @"CheckStalled"]
                && [fDefaults integerForKey: @"StalledMinutes"] < [self stalledMinutes];
    
    //create strings for error or stalled
    if (fError)
    {
        NSString * errorString = [self errorMessage];
        if (!errorString || [errorString isEqualToString: @""])
            [statusString setString: NSLocalizedString(@"Error", "Torrent -> status string")];
        else
            [statusString setString: [NSLocalizedString(@"Error: ", "Torrent -> status string")
                                    stringByAppendingString: errorString]];
    }
    else if (fStalled)
        [statusString insertString: NSLocalizedString(@"Stalled, ", "Torrent -> status string") atIndex: 0];
    else;
    
    //update queue for checking (from downloading to seeding), stalled, or error
    if ((wasChecking && !fChecking) || (!wasStalled && fStalled) || (!wasError && fError && [self isActive]))
        [[NSNotificationCenter defaultCenter] postNotificationName: @"UpdateQueue" object: self];

    if ([self isActive] && ![self isChecking])
    {
        NSString * stringToAppend = @"";
        if (![self allDownloaded])
        {
            stringToAppend = [NSString stringWithFormat: NSLocalizedString(@"DL: %@, ", "Torrent -> status string"),
                                [NSString stringForSpeed: [self downloadRate]]];
            [shortStatusString setString: @""];
        }
        else
        {
            NSString * ratioString = [NSString stringForRatio: [self ratio]];
        
            [shortStatusString setString: [NSString stringWithFormat: NSLocalizedString(@"Ratio: %@, ",
                                            "Torrent -> status string"), ratioString]];
            [remainingTimeString setString: [NSLocalizedString(@"Ratio: ", "Torrent -> status string")
                                                stringByAppendingString: ratioString]];
        }
        
        stringToAppend = [stringToAppend stringByAppendingString: [NSLocalizedString(@"UL: ", "Torrent -> status string")
                                            stringByAppendingString: [NSString stringForSpeed: [self uploadRate]]]];

        [statusString appendFormat: @" - %@", stringToAppend];
        [shortStatusString appendString: stringToAppend];
    }
	
    //retain the strings
    [fProgressString release];
    fProgressString = progressString;
    
    [fStatusString release];
    fStatusString = statusString;
    
    [fShortStatusString release];
    fShortStatusString = shortStatusString;
    
    [fRemainingTimeString release];
    fRemainingTimeString = remainingTimeString;
}

- (void) startTransfer
{
    fWaitToStart = NO;
    fFinishedSeeding = NO;
    
    if (![self isActive] && [self alertForFolderAvailable] && [self alertForRemainingDiskSpace])
    {
        tr_torrentStart(fHandle);
        [self update];
    }
}

- (void) stopTransfer
{
    fError = NO;
    fWaitToStart = NO;
    
    if ([self isActive])
    {
        tr_torrentStop(fHandle);
        [self update];
        
        [[NSNotificationCenter defaultCenter] postNotificationName: @"UpdateQueue" object: self];
    }
}

- (void) sleep
{
    if ((fResumeOnWake = [self isActive]))
        tr_torrentStop(fHandle);
}

- (void) wakeUp
{
    if (fResumeOnWake)
        tr_torrentStart(fHandle);
}

- (void) manualAnnounce
{
    tr_manualUpdate(fHandle);
}

- (BOOL) canManualAnnounce
{
    return tr_torrentCanManualUpdate(fHandle);
}

- (void) resetCache
{
    tr_torrentRecheck(fHandle);
    [self update];
}

- (float) ratio
{
    return fStat->ratio;
}

- (int) ratioSetting
{
    return fRatioSetting;
}

- (void) setRatioSetting: (int) setting
{
    fRatioSetting = setting;
}

- (float) ratioLimit
{
    return fRatioLimit;
}

- (void) setRatioLimit: (float) limit
{
    if (limit >= 0)
        fRatioLimit = limit;
}

- (float) actualStopRatio
{
    if (fRatioSetting == NSOnState)
        return fRatioLimit;
    else if (fRatioSetting == NSMixedState && [fDefaults boolForKey: @"RatioCheck"])
        return [fDefaults floatForKey: @"RatioLimit"];
    else
        return INVALID;
}

- (float) progressStopRatio
{
    float stopRatio, ratio;
    if ((stopRatio = [self actualStopRatio]) == INVALID || (ratio = [self ratio]) >= stopRatio)
        return 1.0;
    else if (ratio > 0 && stopRatio > 0)
        return ratio / stopRatio;
    else
        return 0;
}

#warning use enum value
- (int) speedMode: (BOOL) upload
{
    return tr_torrentGetSpeedMode(fHandle, upload ? TR_UP : TR_DOWN);
}

- (void) setSpeedMode: (int) mode upload: (BOOL) upload
{
    tr_torrentSetSpeedMode(fHandle, upload ? TR_UP : TR_DOWN, mode);
}

- (int) speedLimit: (BOOL) upload
{
    return tr_torrentGetSpeedLimit(fHandle, upload ? TR_UP : TR_DOWN);
}

- (void) setSpeedLimit: (int) limit upload: (BOOL) upload
{
    tr_torrentSetSpeedLimit(fHandle, upload ? TR_UP : TR_DOWN, limit);
}

- (void) setWaitToStart: (BOOL) wait
{
    fWaitToStart = wait;
}

- (BOOL) waitingToStart
{
    return fWaitToStart;
}

- (void) revealData
{
    [[NSWorkspace sharedWorkspace] selectFile: [self dataLocation] inFileViewerRootedAtPath: nil];
}

- (void) revealPublicTorrent
{
    if (fPublicTorrent)
        [[NSWorkspace sharedWorkspace] selectFile: fPublicTorrentLocation inFileViewerRootedAtPath: nil];
}

- (void) trashData
{
    [self trashFile: [self dataLocation]];
}

- (void) trashTorrent
{
    if (fPublicTorrent)
        [self trashFile: [self publicTorrentLocation]];
}

- (void) moveTorrentDataFileTo: (NSString *) folder
{
    NSString * oldFolder = [self downloadFolder];
    if (![oldFolder isEqualToString: folder] || ![fDownloadFolder isEqualToString: folder])
    {
        //check if moving inside itself
        NSArray * oldComponents = [oldFolder pathComponents],
                * newComponents = [folder pathComponents];
        int count;
        
        if ((count = [oldComponents count]) < [newComponents count]
                && [[newComponents objectAtIndex: count] isEqualToString: [self name]]
                && [oldComponents isEqualToArray:
                        [newComponents objectsAtIndexes: [NSIndexSet indexSetWithIndexesInRange: NSMakeRange(0, count)]]])
        {
            NSAlert * alert = [[NSAlert alloc] init];
            [alert setMessageText: NSLocalizedString(@"A folder cannot be moved to inside itself.",
                                                        "Move inside itself alert -> title")];
            [alert setInformativeText: [NSString stringWithFormat:
                            NSLocalizedString(@"The move operation of \"%@\" cannot be done.",
                                                "Move inside itself alert -> message"), [self name]]];
            [alert addButtonWithTitle: NSLocalizedString(@"OK", "Move inside itself alert -> button")];
            
            [alert runModal];
            [alert release];
            
            return;
        }
        
        [self quickPause];
        
        if ([[NSFileManager defaultManager] movePath: [oldFolder stringByAppendingPathComponent: [self name]]
                            toPath: [folder stringByAppendingPathComponent: [self name]] handler: nil])
        {
            //get rid of both incomplete folder and old download folder, even if move failed
            fUseIncompleteFolder = NO;
            if (fIncompleteFolder)
            {
                [fIncompleteFolder release];
                fIncompleteFolder = nil;
            }
            [self changeDownloadFolder: folder];
            
            [[NSNotificationCenter defaultCenter] postNotificationName: @"UpdateInfoSettings" object: nil];
            
            [self endQuickPause];
        }
        else
        {
            [self endQuickPause];
        
            NSAlert * alert = [[NSAlert alloc] init];
            [alert setMessageText: NSLocalizedString(@"There was an error moving the data file.", "Move error alert -> title")];
            [alert setInformativeText: [NSString stringWithFormat:
                            NSLocalizedString(@"The move operation of \"%@\" cannot be done.",
                                                "Move error alert -> message"), [self name]]];
            [alert addButtonWithTitle: NSLocalizedString(@"OK", "Move error alert -> button")];
            
            [alert runModal];
            [alert release];
        }
    }
}

- (void) copyTorrentFileTo: (NSString *) path
{
    [[NSFileManager defaultManager] copyPath: [self torrentLocation] toPath: path handler: nil];
}

- (BOOL) alertForRemainingDiskSpace
{
    if ([self allDownloaded] || ![fDefaults boolForKey: @"WarningRemainingSpace"])
        return YES;
    
    NSString * volumeName;
    if ((volumeName = [[[NSFileManager defaultManager] componentsToDisplayForPath: [self downloadFolder]] objectAtIndex: 0]))
    {
        NSDictionary * systemAttributes = [[NSFileManager defaultManager] fileSystemAttributesAtPath: [self downloadFolder]];
        uint64_t remainingSpace = [[systemAttributes objectForKey: NSFileSystemFreeSize] unsignedLongLongValue];
        
        uint64_t existingSize = 0;
        NSDirectoryEnumerator * enumerator;
        if ((enumerator = [[NSFileManager defaultManager] enumeratorAtPath:
                    [[self downloadFolder] stringByAppendingPathComponent: [self name]]]))
        {
            NSDictionary * fileAttributes; 
            while ([enumerator nextObject])
            {
                fileAttributes = [enumerator fileAttributes];
                if (![[fileAttributes objectForKey: NSFileType] isEqualTo: NSFileTypeDirectory])
                    existingSize += [[fileAttributes objectForKey: NSFileSize] unsignedLongLongValue];
            }
        }
        
        #warning factor in checked files
        if (remainingSpace + existingSize <= [self size])
        {
            NSAlert * alert = [[NSAlert alloc] init];
            [alert setMessageText: [NSString stringWithFormat:
                                    NSLocalizedString(@"Not enough remaining disk space to download \"%@\" completely.",
                                        "Torrent file disk space alert -> title"), [self name]]];
            [alert setInformativeText: [NSString stringWithFormat: NSLocalizedString(@"The transfer will be paused."
                                        " Clear up space on %@ or deselect files in the torrent inspector to continue.",
                                        "Torrent file disk space alert -> message"), volumeName]];
            [alert addButtonWithTitle: NSLocalizedString(@"OK", "Torrent file disk space alert -> button")];
            [alert addButtonWithTitle: NSLocalizedString(@"Download Anyway", "Torrent file disk space alert -> button")];
            [alert addButtonWithTitle: NSLocalizedString(@"Always Download", "Torrent file disk space alert -> button")];
            
            int result = [alert runModal];
            [alert release];
            
            if (result == NSAlertThirdButtonReturn)
                [fDefaults setBool: NO forKey: @"WarningRemainingSpace"];
            
            return result != NSAlertFirstButtonReturn;
        }
    }
    return YES;
}

- (BOOL) alertForFolderAvailable
{
    if (access(tr_torrentGetFolder(fHandle), 0))
    {
        NSAlert * alert = [[NSAlert alloc] init];
        [alert setMessageText: [NSString stringWithFormat:
                                NSLocalizedString(@"The folder for downloading \"%@\" cannot be used.",
                                    "Folder cannot be used alert -> title"), [self name]]];
        [alert setInformativeText: [NSString stringWithFormat:
                        NSLocalizedString(@"\"%@\" cannot be used. The transfer will be paused.",
                                            "Folder cannot be used alert -> message"), [self downloadFolder]]];
        [alert addButtonWithTitle: NSLocalizedString(@"OK", "Folder cannot be used alert -> button")];
        [alert addButtonWithTitle: [NSLocalizedString(@"Choose New Location",
                                    "Folder cannot be used alert -> location button") stringByAppendingEllipsis]];
        
        if ([alert runModal] != NSAlertFirstButtonReturn)
        {
            NSOpenPanel * panel = [NSOpenPanel openPanel];
            
            [panel setPrompt: NSLocalizedString(@"Select", "Folder cannot be used alert -> prompt")];
            [panel setAllowsMultipleSelection: NO];
            [panel setCanChooseFiles: NO];
            [panel setCanChooseDirectories: YES];
            [panel setCanCreateDirectories: YES];

            [panel setMessage: [NSString stringWithFormat: NSLocalizedString(@"Select the download folder for \"%@\"",
                                "Folder cannot be used alert -> select destination folder"), [self name]]];
            
            [[NSNotificationCenter defaultCenter] postNotificationName: @"MakeWindowKey" object: nil];
            [panel beginSheetForDirectory: nil file: nil types: nil modalForWindow: [NSApp keyWindow] modalDelegate: self
                    didEndSelector: @selector(destinationChoiceClosed:returnCode:contextInfo:) contextInfo: nil];
        }
        
        [alert release];
        
        return NO;
    }
    
    return YES;
}

- (void) destinationChoiceClosed: (NSOpenPanel *) openPanel returnCode: (int) code contextInfo: (void *) context
{
    if (code != NSOKButton)
        return;
    
    NSString * folder = [[openPanel filenames] objectAtIndex: 0];
    if (fUseIncompleteFolder)
        [self changeDownloadFolder: folder];
    else
        [self changeDownloadFolder: folder];
    
    [self startTransfer];
    [self update];
    
    [[NSNotificationCenter defaultCenter] postNotificationName: @"UpdateInfoSettings" object: nil];
}

- (BOOL) alertForMoveFolderAvailable
{
    if (access([fDownloadFolder UTF8String], 0))
    {
        NSAlert * alert = [[NSAlert alloc] init];
        [alert setMessageText: [NSString stringWithFormat:
                                NSLocalizedString(@"The folder for moving the completed \"%@\" cannot be used.",
                                    "Move folder cannot be used alert -> title"), [self name]]];
        [alert setInformativeText: [NSString stringWithFormat:
                                NSLocalizedString(@"\"%@\" cannot be used. The file will remain in its current location.",
                                    "Move folder cannot be used alert -> message"), fDownloadFolder]];
        [alert addButtonWithTitle: NSLocalizedString(@"OK", "Move folder cannot be used alert -> button")];
        
        [alert runModal];
        [alert release];
        
        return NO;
    }
    
    return YES;
}

- (NSImage *) icon
{
    if (!fIcon)
    {
        fIcon = [[[NSWorkspace sharedWorkspace] iconForFileType: fInfo->multifile ? NSFileTypeForHFSTypeCode('fldr')
                                                : [[self name] pathExtension]] retain];
        [fIcon setFlipped: YES];
    }
    return fIcon;
}

- (NSString *) name
{
    return [NSString stringWithUTF8String: fInfo->name];
}

- (uint64_t) size
{
    return fInfo->totalSize;
}

- (NSString *) trackerAddress
{
    return [NSString stringWithFormat: @"http://%s:%d", fStat->tracker->address, fStat->tracker->port];
}

- (NSString *) trackerAddressAnnounce
{
    return [NSString stringWithUTF8String: fStat->tracker->announce];
}

- (NSString *) comment
{
    return [NSString stringWithUTF8String: fInfo->comment];
}

- (NSString *) creator
{
    return [NSString stringWithUTF8String: fInfo->creator];
}

- (NSDate *) dateCreated
{
    int date = fInfo->dateCreated;
    return date > 0 ? [NSDate dateWithTimeIntervalSince1970: date] : nil;
}

- (int) pieceSize
{
    return fInfo->pieceSize;
}

- (int) pieceCount
{
    return fInfo->pieceCount;
}

- (NSString *) hashString
{
    return [NSString stringWithUTF8String: fInfo->hashString];
}

- (BOOL) privateTorrent
{
    return TR_FLAG_PRIVATE & fInfo->flags;
}

- (NSString *) torrentLocation
{
    return [NSString stringWithUTF8String: fInfo->torrent];
}

- (NSString *) publicTorrentLocation
{
    return fPublicTorrentLocation;
}

- (NSString *) dataLocation
{
    return [[self downloadFolder] stringByAppendingPathComponent: [self name]];
}

- (BOOL) publicTorrent
{
    return fPublicTorrent;
}

- (NSString *) stateString
{
    switch( fStat->status )
    {
        case TR_STATUS_STOPPED:
            return NSLocalizedString(@"Paused", "Torrent -> status string");
            break;

        case TR_STATUS_CHECK:
            return [NSString stringWithFormat: NSLocalizedString(@"Checking existing data (%.2f%%)",
                                    "Torrent -> status string"), 100.0 * fStat->recheckProgress];
            break;
        
        case TR_STATUS_CHECK_WAIT:
            return [NSLocalizedString(@"Waiting to check existing data", "Torrent -> status string") stringByAppendingEllipsis];
            break;

        case TR_STATUS_DOWNLOAD:
            return NSLocalizedString(@"Downloading", "Torrent -> status string");
            break;

        case TR_STATUS_SEED:
        case TR_STATUS_DONE:
            return NSLocalizedString(@"Seeding", "Torrent -> status string");
            break;

        case TR_STATUS_STOPPING:
            return [NSLocalizedString(@"Stopping", "Torrent -> status string") stringByAppendingEllipsis];
            break;
        
        default:
            return NSLocalizedString(@"N/A", "Torrent -> status string");
    }
}

- (float) progress
{
    return fStat->percentComplete;
}

- (float) progressDone
{
    return fStat->percentDone;
}

- (float) progressLeft
{
    return (float)fStat->left/[self size];
}

- (int) eta
{
    return fStat->eta;
}

- (BOOL) isActive
{
    return fStat->status & TR_STATUS_ACTIVE;
}

- (BOOL) isSeeding
{
    return fStat->status == TR_STATUS_SEED || fStat->status == TR_STATUS_DONE;
}

- (BOOL) isPaused
{
    return fStat->status == TR_STATUS_STOPPED;
}

- (BOOL) isChecking
{
    return fStat->status == TR_STATUS_CHECK || fStat->status == TR_STATUS_CHECK_WAIT;
}

- (BOOL) allDownloaded
{
    return fStat->cpStatus != TR_CP_INCOMPLETE;
}

- (BOOL) isComplete
{
    return fStat->cpStatus == TR_CP_COMPLETE;
}

- (BOOL) isError
{
    return fStat->error != 0;
}

- (NSString *) errorMessage
{
    if (![self isError])
        return @"";
    
    NSString * error;
    if (!(error = [NSString stringWithUTF8String: fStat->errorString])
        && !(error = [NSString stringWithCString: fStat->errorString encoding: NSISOLatin1StringEncoding]))
        error = NSLocalizedString(@"(unreadable error)", "Torrent -> error string unreadable");
    
    return error;
}

- (NSArray *) peers
{
    int totalPeers, i;
    tr_peer_stat_t * peers = tr_torrentPeers(fHandle, &totalPeers);
    
    NSMutableArray * peerDics = [NSMutableArray arrayWithCapacity: totalPeers];
    NSMutableDictionary * dic;
    
    tr_peer_stat_t * peer;
    for (i = 0; i < totalPeers; i++)
    {
        peer = &peers[i];
        
        dic = [NSMutableDictionary dictionaryWithObjectsAndKeys:
            [NSNumber numberWithBool: peer->isConnected], @"Connected",
            [NSNumber numberWithInt: peer->from], @"From",
            [NSString stringWithCString: (char *) peer->addr encoding: NSUTF8StringEncoding], @"IP",
            [NSNumber numberWithInt: peer->port], @"Port", nil];
        
        if (peer->isConnected)
        {
            [dic setObject: [NSNumber numberWithFloat: peer->progress] forKey: @"Progress"];
            
            if (peer->isDownloading)
                [dic setObject: [NSNumber numberWithFloat: peer->uploadToRate] forKey: @"UL To Rate"];
            if (peer->isUploading)
                [dic setObject: [NSNumber numberWithFloat: peer->downloadFromRate] forKey: @"DL From Rate"];
            
            [dic setObject: [NSNumber numberWithBool: /*peer->isEncrypted*/NO] forKey: @"Encryption"];
            
            [dic setObject: [NSString stringWithCString: (char *) peer->client encoding: NSUTF8StringEncoding] forKey: @"Client"];
        }
        else
            [dic setObject: @"" forKey: @"Client"]; //needed to be set here for client sort
        
        [peerDics addObject: dic];
    }
    
    tr_torrentPeersFree(peers, totalPeers);
    
    return peerDics;
}

- (NSString *) progressString
{
    return fProgressString;
}

- (NSString *) statusString
{
    return fStatusString;
}

- (NSString *) shortStatusString
{
    return fShortStatusString;
}

- (NSString *) remainingTimeString
{
    return fRemainingTimeString;
}

- (int) seeders
{
    return fStat->seeders;
}

- (int) leechers
{
    return fStat->leechers;
}

- (int) completedFromTracker
{
    return fStat->completedFromTracker;
}

- (int) totalPeersConnected
{
    return fStat->peersConnected;
}

- (int) totalPeersTracker
{
    return fStat->peersFrom[TR_PEER_FROM_TRACKER];
}

- (int) totalPeersIncoming
{
    return fStat->peersFrom[TR_PEER_FROM_INCOMING];
}

- (int) totalPeersCache
{
    return fStat->peersFrom[TR_PEER_FROM_CACHE];
}

- (int) totalPeersPex
{
    return fStat->peersFrom[TR_PEER_FROM_PEX];
}

- (int) peersSendingToUs
{
    return fStat->peersSendingToUs;
}

- (int) peersGettingFromUs
{
    return fStat->peersGettingFromUs;
}

- (float) downloadRate
{
    return fStat->rateDownload;
}

- (float) uploadRate
{
    return fStat->rateUpload;
}

- (uint64_t) downloadedValid
{
    return fStat->downloadedValid;
}

- (uint64_t) downloadedTotal
{
    return fStat->downloaded;
}

- (uint64_t) uploadedTotal
{
    return fStat->uploaded;
}

- (float) swarmSpeed
{
    return fStat->swarmspeed;
}

- (BOOL) pex
{
	return fPex;
}

- (void) setPex: (BOOL) setting
{
	if (![self privateTorrent])
	{
		fPex = setting;
		tr_torrentDisablePex(fHandle, !setting);
	}
}

- (NSNumber *) orderValue
{
    return [NSNumber numberWithInt: fOrderValue];
}

- (void) setOrderValue: (int) orderValue
{
    fOrderValue = orderValue;
}

- (NSArray *) fileList
{
    return fFileList;
}

- (int) fileCount
{
    return fInfo->fileCount;
}

- (void) updateFileStat
{
    if (fileStat)
        tr_torrentFilesFree(fileStat, [self fileCount]);
    
    int count;
    fileStat = tr_torrentFiles(fHandle, &count);
}

- (float) fileProgress: (int) index
{
    if (!fileStat)
        [self updateFileStat];
        
    return fileStat[index].progress;
}

- (BOOL) canChangeDownloadCheckForFile: (int) index
{
    if (!fileStat)
        [self updateFileStat];
    
    return [self fileCount] > 1 && fileStat[index].completionStatus != TR_CP_COMPLETE;
}

- (BOOL) canChangeDownloadCheckForFiles: (NSIndexSet *) indexSet
{
    if ([self fileCount] <= 1 || [self isComplete])
        return NO;
    
    if (!fileStat)
        [self updateFileStat];
    
    int index;
    for (index = [indexSet firstIndex]; index != NSNotFound; index = [indexSet indexGreaterThanIndex: index])
        if (fileStat[index].completionStatus != TR_CP_COMPLETE)
            return YES;
    return NO;
}

- (int) checkForFiles: (NSIndexSet *) indexSet
{
    BOOL onState = NO, offState = NO;
    int index;
    for (index = [indexSet firstIndex]; index != NSNotFound; index = [indexSet indexGreaterThanIndex: index])
    {
        if (tr_torrentGetFileDL(fHandle, index) || ![self canChangeDownloadCheckForFile: index])
            onState = YES;
        else
            offState = YES;
        
        if (onState && offState)
            return NSMixedState;
    }
    return onState ? NSOnState : NSOffState;
}

- (void) setFileCheckState: (int) state forIndexes: (NSIndexSet *) indexSet
{
    int count = [indexSet count], i = 0, index;
    int * files = malloc(count * sizeof(int));
    for (index = [indexSet firstIndex]; index != NSNotFound; index = [indexSet indexGreaterThanIndex: index])
    {
        files[i] = index;
        i++;
    }
    
    tr_torrentSetFileDLs(fHandle, files, count, state != NSOffState);
    free(files);
    
    [self update];
}

- (void) setFilePriority: (int) priority forIndexes: (NSIndexSet *) indexSet
{
    int count = [indexSet count], i = 0, index;
    int * files = malloc(count * sizeof(int));
    for (index = [indexSet firstIndex]; index != NSNotFound; index = [indexSet indexGreaterThanIndex: index])
    {
        files[i] = index;
        i++;
    }

    tr_torrentSetFilePriorities(fHandle, files, count, priority);
    free(files);
}

- (BOOL) hasFilePriority: (int) priority forIndexes: (NSIndexSet *) indexSet
{
    int index;
    for (index = [indexSet firstIndex]; index != NSNotFound; index = [indexSet indexGreaterThanIndex: index])
        if (priority == tr_torrentGetFilePriority(fHandle, index) && [self canChangeDownloadCheckForFile: index])
            return YES;
    return NO;
}

- (NSSet *) filePrioritiesForIndexes: (NSIndexSet *) indexSet
{
    BOOL low = NO, normal = NO, high = NO;
    NSMutableSet * priorities = [NSMutableSet setWithCapacity: 3];
    
    int index, priority;
    for (index = [indexSet firstIndex]; index != NSNotFound; index = [indexSet indexGreaterThanIndex: index])
    {
        if (![self canChangeDownloadCheckForFile: index])
            continue;
        
        priority = tr_torrentGetFilePriority(fHandle, index);
        if (priority == TR_PRI_LOW)
        {
            if (low)
                continue;
            low = YES;
        }
        else if (priority == TR_PRI_HIGH)
        {
            if (high)
                continue;
            high = YES;
        }
        else
        {
            if (normal)
                continue;
            normal = YES;
        }
        
        [priorities addObject: [NSNumber numberWithInt: priority]];
        if (low && normal && high)
            break;
    }
    return priorities;
}

- (NSMenu *) fileMenu
{
    if (!fFileMenu)
    {
        fFileMenu = [[NSMenu alloc] initWithTitle: [@"TorrentMenu:" stringByAppendingString: [self name]]];
        [fFileMenu setAutoenablesItems: NO];
    }
    return fFileMenu;
}

- (NSDate *) dateAdded
{
    return fDateAdded;
}

- (NSDate *) dateCompleted
{
    return fDateCompleted;
}

- (NSDate *) dateActivity
{
    uint64_t date = fStat->activityDate;
    return date != 0 ? [NSDate dateWithTimeIntervalSince1970: date / 1000] : fDateActivity;
}

- (int) stalledMinutes
{
    uint64_t start;
    if ((start = fStat->startDate) == 0)
        return -1;
    
    NSDate * started = [NSDate dateWithTimeIntervalSince1970: start / 1000],
            * activity = [self dateActivity];
    
    NSDate * laterDate = (!activity || [started compare: activity] == NSOrderedDescending) ? started : activity;
    return -1 * [laterDate timeIntervalSinceNow] / 60;
}

- (BOOL) isStalled
{
    return fStalled;
}

- (NSNumber *) stateSortKey
{
    if (![self isActive])
        return [NSNumber numberWithInt: 0];
    else if ([self isSeeding])
        return [NSNumber numberWithInt: 1];
    else
        return [NSNumber numberWithInt: 2];
}

#warning is progress different when seeding?
- (NSNumber *) progressSortKey
{
    float progress;
    if ((progress = [self progress]) >= 1.0)
       progress += [self progressStopRatio];
    
    return [NSNumber numberWithFloat: progress];
}

- (NSNumber *) ratioSortKey
{
    return [NSNumber numberWithFloat: [self ratio]];
}

- (int) torrentID
{
    return fID;
}

- (const tr_info_t *) torrentInfo
{
    return fInfo;
}

- (const tr_stat_t *) torrentStat
{
    return fStat;
}

@end

@implementation Torrent (Private)

//if a hash is given, attempt to load that; otherwise, attempt to open file at path
- (id) initWithHash: (NSString *) hashString path: (NSString *) path lib: (tr_handle_t *) lib
        publicTorrent: (NSNumber *) publicTorrent
        downloadFolder: (NSString *) downloadFolder
        useIncompleteFolder: (NSNumber *) useIncompleteFolder incompleteFolder: (NSString *) incompleteFolder
        dateAdded: (NSDate *) dateAdded dateCompleted: (NSDate *) dateCompleted
        dateActivity: (NSDate *) dateActivity
        ratioSetting: (NSNumber *) ratioSetting ratioLimit: (NSNumber *) ratioLimit
		pex: (NSNumber *) pex
        waitToStart: (NSNumber *) waitToStart orderValue: (NSNumber *) orderValue;
{
    if (!(self = [super init]))
        return nil;
    
    static_lastid++;
    fID = static_lastid;
    
    fLib = lib;
    fDefaults = [NSUserDefaults standardUserDefaults];

    fPublicTorrent = path && (publicTorrent ? [publicTorrent boolValue] : ![fDefaults boolForKey: @"DeleteOriginalTorrent"]);
    if (fPublicTorrent)
        fPublicTorrentLocation = [path retain];
    
    fDownloadFolder = downloadFolder ? downloadFolder : [fDefaults stringForKey: @"DownloadFolder"];
    fDownloadFolder = [[fDownloadFolder stringByExpandingTildeInPath] retain];
    
    fUseIncompleteFolder = useIncompleteFolder ? [useIncompleteFolder boolValue]
                                : [fDefaults boolForKey: @"UseIncompleteDownloadFolder"];
    if (fUseIncompleteFolder)
    {
        fIncompleteFolder = incompleteFolder ? incompleteFolder : [fDefaults stringForKey: @"IncompleteDownloadFolder"];
        fIncompleteFolder = [[fIncompleteFolder stringByExpandingTildeInPath] retain];
    }
    
    NSString * currentDownloadFolder;
    tr_info_t info;
    int error;
    if (hashString)
    {
        if (tr_torrentParseHash(fLib, [hashString UTF8String], NULL, &info) == TR_OK)
        {
            currentDownloadFolder = [self shouldUseIncompleteFolderForName: [NSString stringWithUTF8String: info.name]]
                                        ? fIncompleteFolder : fDownloadFolder;
            fHandle = tr_torrentInitSaved(fLib, [hashString UTF8String], [currentDownloadFolder UTF8String],
                                            TR_FLAG_SAVE | TR_FLAG_PAUSED, &error);
        }
        tr_metainfoFree(&info);
    }
    if (!fHandle && path)
    {
        if (tr_torrentParse(fLib, [path UTF8String], NULL, &info) == TR_OK)
        {
            currentDownloadFolder = [self shouldUseIncompleteFolderForName: [NSString stringWithUTF8String: info.name]]
                                        ? fIncompleteFolder : fDownloadFolder;
            fHandle = tr_torrentInit(fLib, [path UTF8String], [currentDownloadFolder UTF8String],
                                        TR_FLAG_SAVE | TR_FLAG_PAUSED, &error);
        }
        tr_metainfoFree(&info);
    }
    if (!fHandle)
    {
        [self release];
        return nil;
    }
    
    fInfo = tr_torrentInfo(fHandle);

    fDateAdded = dateAdded ? [dateAdded retain] : [[NSDate alloc] init];
	if (dateCompleted)
		fDateCompleted = [dateCompleted retain];
    if (dateActivity)
		fDateActivity = [dateActivity retain];
	
    fRatioSetting = ratioSetting ? [ratioSetting intValue] : NSMixedState;
    fRatioLimit = ratioLimit ? [ratioLimit floatValue] : [fDefaults floatForKey: @"RatioLimit"];
    fFinishedSeeding = NO;
	
	if ([self privateTorrent])
		fPex = NO;
	else
		fPex = pex ? [pex boolValue] : YES;
	tr_torrentDisablePex(fHandle, !fPex);
    
    fWaitToStart = waitToStart ? [waitToStart boolValue] : [fDefaults boolForKey: @"AutoStartDownload"];
    fOrderValue = orderValue ? [orderValue intValue] : tr_torrentCount(fLib) - 1;
    fError = NO;
    
    [self createFileList];
    
    [self update];
    return self;
}

- (void) createFileList
{
    int count = [self fileCount], i;
    tr_file_t * file;
    NSMutableArray * pathComponents;
    NSString * path;
    
    NSMutableArray * fileList = [[NSMutableArray alloc] init],
                    * flatFileList = [[NSMutableArray alloc] initWithCapacity: count];
    
    for (i = 0; i < count; i++)
    {
        file = &fInfo->files[i];
        
        pathComponents = [[[NSString stringWithUTF8String: file->name] pathComponents] mutableCopy];
        if (fInfo->multifile)
        {
            path = [pathComponents objectAtIndex: 0];
            [pathComponents removeObjectAtIndex: 0];
        }
        else
            path = @"";
        
        [self insertPath: pathComponents forSiblings: fileList withParent: nil previousPath: path
                flatList: flatFileList fileSize: file->length index: i];
        [pathComponents autorelease];
    }
    
    fFileList = [[NSArray alloc] initWithArray: fileList];
    [fileList release];
    fFlatFileList = [[NSArray alloc] initWithArray: flatFileList];
    [flatFileList release];
}

- (void) insertPath: (NSMutableArray *) components forSiblings: (NSMutableArray *) siblings
        withParent: (NSMutableDictionary *) parent previousPath: (NSString *) previousPath
        flatList: (NSMutableArray *) flatList fileSize: (uint64_t) size index: (int) index
{
    NSString * name = [components objectAtIndex: 0];
    BOOL isFolder = [components count] > 1;
    
    NSMutableDictionary * dict = nil;
    if (isFolder)
    {
        NSEnumerator * enumerator = [siblings objectEnumerator];
        while ((dict = [enumerator nextObject]))
            if ([[dict objectForKey: @"IsFolder"] boolValue] && [[dict objectForKey: @"Name"] isEqualToString: name])
                break;
    }
    
    NSString * currentPath = [previousPath stringByAppendingPathComponent: name];
    
    //create new folder or item if it doesn't already exist
    if (!dict)
    {
        dict = [NSMutableDictionary dictionaryWithObjectsAndKeys: name, @"Name",
                [NSNumber numberWithBool: isFolder], @"IsFolder", currentPath, @"Path", nil];
        [siblings addObject: dict];
        
        if (isFolder)
        {
            [dict setObject: [NSMutableArray array] forKey: @"Children"];
            [dict setObject: [NSMutableIndexSet indexSetWithIndex: index] forKey: @"Indexes"];
        }
        else
        {
            [dict setObject: [NSIndexSet indexSetWithIndex: index] forKey: @"Indexes"];
            [dict setObject: [NSNumber numberWithUnsignedLongLong: size] forKey: @"Size"];
            
            NSImage * icon = [[NSWorkspace sharedWorkspace] iconForFileType: [name pathExtension]];
            [icon setFlipped: YES];
            [dict setObject: icon forKey: @"Icon"];
            
            [flatList addObject: dict];
        }
        
        if (parent)
            [dict setObject: parent forKey: @"Parent"];
    }
    else
        [[dict objectForKey: @"Indexes"] addIndex: index];
    
    if (isFolder)
    {
        [components removeObjectAtIndex: 0];
        [self insertPath: components forSiblings: [dict objectForKey: @"Children"]
            withParent: dict previousPath: currentPath flatList: flatList fileSize: size index: index];
    }
}

- (BOOL) shouldUseIncompleteFolderForName: (NSString *) name
{
    return fUseIncompleteFolder &&
        ![[NSFileManager defaultManager] fileExistsAtPath: [fDownloadFolder stringByAppendingPathComponent: name]];
}

- (void) updateDownloadFolder
{
    NSString * folder = [self shouldUseIncompleteFolderForName: [self name]] ? fIncompleteFolder : fDownloadFolder;
    tr_torrentSetFolder(fHandle, [folder UTF8String]);
}

- (void) quickPause
{
    if (fQuickPauseDict)
        return;

    fQuickPauseDict = [[NSDictionary alloc] initWithObjectsAndKeys:
                    [NSNumber numberWithInt: [self speedMode: YES]], @"UploadSpeedMode",
                    [NSNumber numberWithInt: [self speedLimit: YES]], @"UploadSpeedLimit",
                    [NSNumber numberWithInt: [self speedMode: NO]], @"DownloadSpeedMode",
                    [NSNumber numberWithInt: [self speedLimit: NO]], @"DownloadSpeedLimit", nil];
    
    [self setSpeedMode: TR_SPEEDLIMIT_SINGLE upload: YES];
    [self setSpeedLimit: 0 upload: YES];
    [self setSpeedMode: TR_SPEEDLIMIT_SINGLE upload: NO];
    [self setSpeedLimit: 0 upload: NO];
}

- (void) endQuickPause
{
    if (!fQuickPauseDict)
        return;
    
    [self setSpeedMode: [[fQuickPauseDict objectForKey: @"UploadSpeedMode"] intValue] upload: YES];
    [self setSpeedLimit: [[fQuickPauseDict objectForKey: @"UploadSpeedLimit"] intValue] upload: YES];
    [self setSpeedMode: [[fQuickPauseDict objectForKey: @"DownloadSpeedMode"] intValue] upload: NO];
    [self setSpeedLimit: [[fQuickPauseDict objectForKey: @"DownloadSpeedLimit"] intValue] upload: NO];
    
    [fQuickPauseDict release];
    fQuickPauseDict = nil;
}

- (void) trashFile: (NSString *) path
{
    //attempt to move to trash
    if (![[NSWorkspace sharedWorkspace] performFileOperation: NSWorkspaceRecycleOperation
            source: [path stringByDeletingLastPathComponent] destination: @""
            files: [NSArray arrayWithObject: [path lastPathComponent]] tag: nil])
    {
        //if cannot trash, just delete it (will work if it is on a remote volume)
        if (![[NSFileManager defaultManager] removeFileAtPath: path handler: nil])
            NSLog(@"Could not trash %@", path);
    }
}

@end