Clean up root folder.

[enjoyable.git] / Categories / NSFileManager+UniqueNames.m

diff --git a/Categories/NSFileManager+UniqueNames.m b/Categories/NSFileManager+UniqueNames.m
new file mode 100644 (file)
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+++ b/Categories/NSFileManager+UniqueNames.m
@@ -0,0 +1,31 @@
+//
+//  NSFileManager+UniqueNames.m
+//  Enjoyable
+//
+//  Created by Joe Wreschnig on 3/7/13.
+//
+//
+
+#import "NSFileManager+UniqueNames.h"
+
+@implementation NSFileManager (UniqueNames)
+
+- (NSURL *)generateUniqueURLWithBase:(NSURL *)canonical {
+    // Punt for cases that are just too hard.
+    if (!canonical.isFileURL)
+        return canonical;
+
+    NSString *trying = canonical.path;
+    NSString *dirname = [trying stringByDeletingLastPathComponent];
+    NSString *basename = [trying.lastPathComponent stringByDeletingPathExtension];
+    NSString *extension = trying.pathExtension;
+    int index = 1;
+    while ([self fileExistsAtPath:trying] && index < 10000) {
+        NSString *indexName = [NSString stringWithFormat:@"%@ (%d)", basename, index++];
+        indexName = [indexName stringByAppendingPathExtension:extension];
+        trying = [dirname stringByAppendingPathComponent:indexName];
+    }
+    return [NSURL fileURLWithPath:trying];
+}
+
+@end