typedef enum _S3OperationState {
    S3OperationPending = 1,
    S3OperationActive = 2,
    S3OperationPendingRetry = 3,
    S3OperationCanceled = 4,
    S3OperationDone = 5,
    S3OperationError = 6
} S3OperationState;

@class S3Operation;
@class S3Connection;

@protocol S3OperationDelegate
- (void)operationStatusDidChange:(S3Operation *)o;
- (void)operationStateDidChange:(S3Operation *)o;
@end

@interface S3Operation : NSObject {
    S3ConnectionInfo *_connectionInfo;
    CFReadStreamRef _requestStream;
    NSObject<S3OperationDelegate> *_delegate;
    S3OperationState _state;
    NSString *_informationalStatus;
    NSError *_error;
    BOOL _allowsRetry;
}

- (id)init;

- (S3ConnectionInfo *)connectionInfo;
- (void)setConnectionInfo:(S3ConnectionInfo *)connectionInfo

- (BOOL)isStreamedOperation;

- (id)delegate;
- (void)setDelegate:(id)delegate;

- (BOOL)active;
- (BOOL)operationSuccess;

- (NSError *)error;
- (void)setError:(NSError *)error;

- (NSString *)informationalStatus;
- (void)setInformationalStatus:(NSString *)informationalStatus;

- (void)stop:(id)sender;
- (void)start:(id)sender;

- (S3OperationState)state;
- (void)setState:(S3OperationState)state;

- (BOOL)allowsRetry;
- (void)setAllowsRetry:(BOOL)allowsRetry;

- (NSError*)errorFromHTTPRequestStatus:(int)status data:(NSData*)data;

@end