ionicelf.m

#import <Foundation/Foundation.h>
#import <AppKit/AppKit.h>

// author: Martin Michel
// eMail: [email protected]
// created: 27.01.2010 (Apple tablet day!)

void printUsage () {
	printf("ionicelf sets a given image as the icon of a given file\n");
	printf("Usage: ionicelf -img [img file path] -file [file path]\n");
}

int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

	// collecting and verifying the command line arguments
	NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
	
	NSString *imgFilePath = [userDefaults stringForKey:@"img"];
	if (!imgFilePath) {
		printf("Error: The image file path is missing (-img)\n");
		return 1;
	}
	
	NSFileManager *fileManager = [NSFileManager defaultManager];
	BOOL isDir;
	if (![fileManager fileExistsAtPath:imgFilePath isDirectory:&isDir]) {
		printf("Error: The image file does not exist:\n\t%s\n", [imgFilePath UTF8String]);
		return 1;
	} else {
		if (isDir) {
			printf("Error: The image file path points to a directory:\n\t%s\n", [imgFilePath UTF8String]);
			return 1;
		}
	}
	
	NSString *filePath = [userDefaults stringForKey:@"file"];
	if (!filePath) {
		printf("Error: The file path is missing (-file)\n");
		return 1;
	}
	
	if (![fileManager fileExistsAtPath:filePath isDirectory:&isDir]) {
		printf("Error: The file does not exist:\n\t%s\n", [filePath UTF8String]);
		return 1;
	} else {
		if (isDir) {
			printf("Error: The file path points to a directory:\n\t%s\n", [filePath UTF8String]);
			return 1;
		}
	}
	
	// creating an image object from the given image file path
	NSImage *image = [[NSImage alloc] initWithContentsOfFile:imgFilePath];
	if (!image) {
		printf("Error: Could not create image object from file:\n\t%s\n", [imgFilePath UTF8String]);
		return 1;
	}
	
	// setting the image as the file's icon
	NSWorkspace *workSpace = [NSWorkspace sharedWorkspace];
	BOOL success;
	success = [workSpace setIcon:image forFile:filePath options:0];
	
	if (!success) {
		printf("Error: Could not set given image as icon for file:\n\t%s\n", [filePath UTF8String]);
		return 1;
	}
	
	[image release];
	
    [pool drain];
    return 0;
}