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from ..util.singleton import Singleton
from ..util.compat import with_metaclass
from .color import Color
from .level import Level
import sys
class Messenger(with_metaclass(Singleton, object)):
def __init__(self, level = Level.VERBOSE):
self.set_level(level)
self.use_color(True)
def set_level(self, level):
self._level = level
def use_color(self, yesno):
self._use_color = yesno
def log(self, level, message):
if (level >= self._level):
sys.stderr.write('%s%s%s\n' % (self._color(level), message, self._reset()))
def debug(self, message):
self.log(Level.DEBUG, message)
def verbose(self, message):
self.log(Level.VERBOSE, message)
def info(self, message):
self.log(Level.INFO, message)
def warning(self, message):
self.log(Level.WARNING, message)
def error(self, message):
self.log(Level.ERROR, message)
def _color(self, level):
'''
Get a color (terminal escape sequence) according to a level.
'''
if not self._use_color:
return ''
elif level < Level.DEBUG:
return ''
elif Level.DEBUG <= level < Level.VERBOSE:
return Color.YELLOW
elif Level.VERBOSE <= level < Level.INFO:
return Color.BLUE
elif Level.INFO <= level < Level.WARNING:
return Color.GREEN
elif Level.WARNING <= level < Level.ERROR:
return Color.MAGENTA
elif Level.ERROR <= level:
return Color.RED
def _reset(self):
'''
Get a reset color (terminal escape sequence).
'''
if not self._use_color:
return ''
else:
return Color.RESET
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