import time
import string

"""Simple logging module, maintains time and date stamps and wraps lines.

    $Revision: 1 $
    Released into the public domain $Date: 10/28/04 12:04p $
    Steve Holden    http://www.holdenweb.com/
"""


class logfile:
    """Logs strings with time and date stamps."""
    
    def __init__(self, file="logfile.log", length=80):
        import os.path
        """Create log file with set line lengths and ouput file."""
        self.file = open(file, "w")
        self.length = length
        if self.length < 40:
            self.length = 40
        self.log("#### Log file %s ####\n" % (os.path.abspath(file), ))

    def log(self, s):
        """Log a line of text, wrapping as necessary to honor maximum line length."""
        msg = ""
        m = "%s %s\n" % (time.strftime("%d-%m-%Y %H:%M:%S", time.localtime(time.time())), s)
        while len(m) > self.length:
            i = string.rfind(m, " ", 20, self.length)
            msg = msg + m[:i] + "\n"
            m = "                    "+m[i+1:]
        msg = msg+m
        self.file.write(msg)
        self.file.flush()

    def debug(self, s):
        """Log debugging data, tagging in log for easy identification."""
        self.log("DEBUG: "+s)

    def close(self):
        """Terminate logging operations."""
        self.file.close()


#
# Self test for simple service verification
#
if __name__ == "__main__":
    f = logfile("testlog.log")
    f.debug("One line of debug output")
    f.log("One line of non-debug output")
    f.close()