NSFileHandle+TempFile.h

/*
 * NSFileHandle+TempFile.h
 * AQToolkit
 * 
 * Created by Jim Dovey on 10/4/2009.
 * 
 * Copyright (c) 2009 Jim Dovey
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of the project's author nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#import <Foundation/Foundation.h>

/*!
    @category
    @abstract    Temporary file support.
    @discussion
    Routines to create and open a temporary file handle. This uses
    mkstemp() to avoid the race condition between test and creation.
*/
@interface NSFileHandle (AQTempFileSupport)

/*!
    @method
    @abstract   Returns a path for a new temporary file.
    @discussion
    The returned path is based on NSTemporaryDirectory()/#{appName}/#{tempName}.
 */
- (id) initTempFile;

/*!
    @method
    @abstract   Returns a path for a new temporary file within the given folder.
    @discussion
    The returned path is based on folderName/#{tempName}.
    This routine is this category's 'designated initializer'; the others all
    call this method to initialize the returned object.
 */
- (id) initTempFileInFolder: (NSString *) folderPath;

/*!
    @method     
    @abstract   Create a temporary file inside NSTemporaryDirectory(), inside a given folder.
    @param subfolderName The name of the subfolder of NSTemporaryDirectory() in which to create the temp file.
    @discussion
    The returned path is based on NSTemporaryDirectory()/folderName/#{tempName}
 */
- (id) initTempFileUnderSubfolder: (NSString *) subfolderName;

// conveniences for the above
+ (NSFileHandle *) tempFile;
+ (NSFileHandle *) tempFileInFolder: (NSString *) folderPath;
+ (NSFileHandle *) tempFileUnderSubfolder: (NSString *) subfolderName;

/*!
    @method     
    @abstract   Returns the path of a file handle based around a file descriptor.
    @discussion
    Note that this function can return nil if the receiver was not initialized from
    a file on the local filesystem.
*/
- (NSString *) filePath;

/*!
    @method     
    @abstract   Delete any temp files created through this NSFileHandle category.
    @discussion
    This feels slightly hacky, but it gives a simple way to clean up any temporary
    files created when your application exits.  It doesn't take into account any
    files you have deleted yourself, but it won't balk at them either.
*/
+ (void) deleteTemporaryFiles;


@end