Subversion Repositories Mobile Apps.GyroMouse

#import <Foundation/Foundation.h>

#import "DDLog.h"

@class DDLogFileInfo;

/**

 * Welcome to Cocoa Lumberjack!

 *

 * The project page has a wealth of documentation if you have any questions.

 * https://github.com/CocoaLumberjack/CocoaLumberjack

 *

 * If you're new to the project you may wish to read the "Getting Started" wiki.

 * https://github.com/CocoaLumberjack/CocoaLumberjack/wiki/GettingStarted

 *

 *

 * This class provides a logger to write log statements to a file.

**/

// Default configuration and safety/sanity values.

// 

// maximumFileSize         -> DEFAULT_LOG_MAX_FILE_SIZE

// rollingFrequency        -> DEFAULT_LOG_ROLLING_FREQUENCY

// maximumNumberOfLogFiles -> DEFAULT_LOG_MAX_NUM_LOG_FILES

// 

// You should carefully consider the proper configuration values for your application.

#define DEFAULT_LOG_MAX_FILE_SIZE     (1024 * 1024)   //  1 MB

#define DEFAULT_LOG_ROLLING_FREQUENCY (60 * 60 * 24)  // 24 Hours

#define DEFAULT_LOG_MAX_NUM_LOG_FILES (5)             //  5 Files

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

#pragma mark -

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

// The LogFileManager protocol is designed to allow you to control all aspects of your log files.

// 

// The primary purpose of this is to allow you to do something with the log files after they have been rolled.

// Perhaps you want to compress them to save disk space.

// Perhaps you want to upload them to an FTP server.

// Perhaps you want to run some analytics on the file.

// 

// A default LogFileManager is, of course, provided.

// The default LogFileManager simply deletes old log files according to the maximumNumberOfLogFiles property.

// 

// This protocol provides various methods to fetch the list of log files.

// 

// There are two variants: sorted and unsorted.

// If sorting is not necessary, the unsorted variant is obviously faster.

// The sorted variant will return an array sorted by when the log files were created,

// with the most recently created log file at index 0, and the oldest log file at the end of the array.

// 

// You can fetch only the log file paths (full path including name), log file names (name only),

// or an array of DDLogFileInfo objects.

// The DDLogFileInfo class is documented below, and provides a handy wrapper that

// gives you easy access to various file attributes such as the creation date or the file size.

@protocol DDLogFileManager <NSObject>

@required

// Public properties

/**

 * The maximum number of archived log files to keep on disk.

 * For example, if this property is set to 3,

 * then the LogFileManager will only keep 3 archived log files (plus the current active log file) on disk.

 * Once the active log file is rolled/archived, then the oldest of the existing 3 rolled/archived log files is deleted.

 *

 * You may optionally disable deleting old/rolled/archived log files by setting this property to zero.

**/

@property (readwrite, assign) NSUInteger maximumNumberOfLogFiles;

// Public methods

- (NSString *)logsDirectory;

- (NSArray *)unsortedLogFilePaths;

- (NSArray *)unsortedLogFileNames;

- (NSArray *)unsortedLogFileInfos;

- (NSArray *)sortedLogFilePaths;

- (NSArray *)sortedLogFileNames;

- (NSArray *)sortedLogFileInfos;

// Private methods (only to be used by DDFileLogger)

- (NSString *)createNewLogFile;

@optional

// Notifications from DDFileLogger

- (void)didArchiveLogFile:(NSString *)logFilePath;

- (void)didRollAndArchiveLogFile:(NSString *)logFilePath;

@end

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

#pragma mark -

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

/**

 * Default log file manager.

 *

 * All log files are placed inside the logsDirectory.

 * If a specific logsDirectory isn't specified, the default directory is used.

 * On Mac, this is in ~/Library/Logs/<Application Name>.

 * On iPhone, this is in ~/Library/Caches/Logs.

 *

 * Log files are named "<app name> <date> <time>.log"

 * Example: MobileSafari 2013-12-03 17-14.log

 *

 * Archived log files are automatically deleted according to the maximumNumberOfLogFiles property.

**/

@interface DDLogFileManagerDefault : NSObject <DDLogFileManager>

{

    NSUInteger maximumNumberOfLogFiles;

    NSString *_logsDirectory;

}

- (id)init;

- (instancetype)initWithLogsDirectory:(NSString *)logsDirectory;

/* Inherited from DDLogFileManager protocol:

@property (readwrite, assign) NSUInteger maximumNumberOfLogFiles;

- (NSString *)logsDirectory;

- (NSArray *)unsortedLogFilePaths;

- (NSArray *)unsortedLogFileNames;

- (NSArray *)unsortedLogFileInfos;

- (NSArray *)sortedLogFilePaths;

- (NSArray *)sortedLogFileNames;

- (NSArray *)sortedLogFileInfos;

*/

@end

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

#pragma mark -

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

/**

 * Most users will want file log messages to be prepended with the date and time.

 * Rather than forcing the majority of users to write their own formatter,

 * we will supply a logical default formatter.

 * Users can easily replace this formatter with their own by invoking the setLogFormatter method.

 * It can also be removed by calling setLogFormatter, and passing a nil parameter.

 *

 * In addition to the convenience of having a logical default formatter,

 * it will also provide a template that makes it easy for developers to copy and change.

**/

@interface DDLogFileFormatterDefault : NSObject <DDLogFormatter>

{

    NSDateFormatter *dateFormatter;

}

- (id)init;

- (instancetype)initWithDateFormatter:(NSDateFormatter *)dateFormatter;

@end

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

#pragma mark -

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

@interface DDFileLogger : DDAbstractLogger <DDLogger>

{

    __strong id <DDLogFileManager> logFileManager;

    DDLogFileInfo *currentLogFileInfo;

    NSFileHandle *currentLogFileHandle;

    dispatch_source_t currentLogFileVnode;

    dispatch_source_t rollingTimer;

    unsigned long long maximumFileSize;

    NSTimeInterval rollingFrequency;

}

- (id)init;

- (instancetype)initWithLogFileManager:(id <DDLogFileManager>)logFileManager;

/**

 * Log File Rolling:

 *

 * maximumFileSize:

 *   The approximate maximum size to allow log files to grow.

 *   If a log file is larger than this value after a log statement is appended,

 *   then the log file is rolled.

 *

 * rollingFrequency

 *   How often to roll the log file.

 *   The frequency is given as an NSTimeInterval, which is a double that specifies the interval in seconds.

 *   Once the log file gets to be this old, it is rolled.

 *

 * Both the maximumFileSize and the rollingFrequency are used to manage rolling.

 * Whichever occurs first will cause the log file to be rolled.

 *

 * For example:

 * The rollingFrequency is 24 hours,

 * but the log file surpasses the maximumFileSize after only 20 hours.

 * The log file will be rolled at that 20 hour mark.

 * A new log file will be created, and the 24 hour timer will be restarted.

 *

 * You may optionally disable rolling due to filesize by setting maximumFileSize to zero.

 * If you do so, rolling is based solely on rollingFrequency.

 *

 * You may optionally disable rolling due to time by setting rollingFrequency to zero (or any non-positive number).

 * If you do so, rolling is based solely on maximumFileSize.

 *

 * If you disable both maximumFileSize and rollingFrequency, then the log file won't ever be rolled.

 * This is strongly discouraged.

**/

@property (readwrite, assign) unsigned long long maximumFileSize;

@property (readwrite, assign) NSTimeInterval rollingFrequency;

/**

 * The DDLogFileManager instance can be used to retrieve the list of log files,

 * and configure the maximum number of archived log files to keep.

 *

 * @see DDLogFileManager.maximumNumberOfLogFiles

**/

@property (strong, nonatomic, readonly) id <DDLogFileManager> logFileManager;

// You can optionally force the current log file to be rolled with this method.

// CompletionBlock will be called on main queue.

- (void)rollLogFileWithCompletionBlock:(void (^)())completionBlock;

// Method is deprecated. Use rollLogFileWithCompletionBlock: method instead.

- (void)rollLogFile __attribute((deprecated));

// Inherited from DDAbstractLogger

// - (id <DDLogFormatter>)logFormatter;

// - (void)setLogFormatter:(id <DDLogFormatter>)formatter;

@end

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

#pragma mark -

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

/**

 * DDLogFileInfo is a simple class that provides access to various file attributes.

 * It provides good performance as it only fetches the information if requested,

 * and it caches the information to prevent duplicate fetches.

 *

 * It was designed to provide quick snapshots of the current state of log files,

 * and to help sort log files in an array.

 *

 * This class does not monitor the files, or update it's cached attribute values if the file changes on disk.

 * This is not what the class was designed for.

 *

 * If you absolutely must get updated values,

 * you can invoke the reset method which will clear the cache.

**/

@interface DDLogFileInfo : NSObject

{

    __strong NSString *filePath;

    __strong NSString *fileName;

    __strong NSDictionary *fileAttributes;

    __strong NSDate *creationDate;

    __strong NSDate *modificationDate;

    unsigned long long fileSize;

}

@property (strong, nonatomic, readonly) NSString *filePath;

@property (strong, nonatomic, readonly) NSString *fileName;

@property (strong, nonatomic, readonly) NSDictionary *fileAttributes;

@property (strong, nonatomic, readonly) NSDate *creationDate;

@property (strong, nonatomic, readonly) NSDate *modificationDate;

@property (nonatomic, readonly) unsigned long long fileSize;

@property (nonatomic, readonly) NSTimeInterval age;

@property (nonatomic, readwrite) BOOL isArchived;

+ (instancetype)logFileWithPath:(NSString *)filePath;

- (instancetype)initWithFilePath:(NSString *)filePath;

- (void)reset;

- (void)renameFile:(NSString *)newFileName;

#if TARGET_IPHONE_SIMULATOR

// So here's the situation.

// Extended attributes are perfect for what we're trying to do here (marking files as archived).

// This is exactly what extended attributes were designed for.

// 

// But Apple screws us over on the simulator.

// Everytime you build-and-go, they copy the application into a new folder on the hard drive,

// and as part of the process they strip extended attributes from our log files.

// Normally, a copy of a file preserves extended attributes.

// So obviously Apple has gone to great lengths to piss us off.

// 

// Thus we use a slightly different tactic for marking log files as archived in the simulator.

// That way it "just works" and there's no confusion when testing.

// 

// The difference in method names is indicative of the difference in functionality.

// On the simulator we add an attribute by appending a filename extension.

// 

// For example:

// log-ABC123.txt -> log-ABC123.archived.txt

- (BOOL)hasExtensionAttributeWithName:(NSString *)attrName;

- (void)addExtensionAttributeWithName:(NSString *)attrName;

- (void)removeExtensionAttributeWithName:(NSString *)attrName;

#else

// Normal use of extended attributes used everywhere else,

// such as on Macs and on iPhone devices.

- (BOOL)hasExtendedAttributeWithName:(NSString *)attrName;

- (void)addExtendedAttributeWithName:(NSString *)attrName;

- (void)removeExtendedAttributeWithName:(NSString *)attrName;

#endif

- (NSComparisonResult)reverseCompareByCreationDate:(DDLogFileInfo *)another;

- (NSComparisonResult)reverseCompareByModificationDate:(DDLogFileInfo *)another;

@end