Onionr/onionr/logger.py

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'''
Onionr - P2P Microblogging Platform & Social network
This file handles all operations involving logging
'''
'''
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
'''
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import re, sys, time, traceback
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class colors:
'''
This class allows you to set the color if ANSI codes are supported
'''
reset='\033[0m'
bold='\033[01m'
disable='\033[02m'
underline='\033[04m'
reverse='\033[07m'
strikethrough='\033[09m'
invisible='\033[08m'
italics='\033[3m'
class fg:
black='\033[30m'
red='\033[31m'
green='\033[32m'
orange='\033[33m'
blue='\033[34m'
purple='\033[35m'
cyan='\033[36m'
lightgrey='\033[37m'
darkgrey='\033[90m'
lightred='\033[91m'
lightgreen='\033[92m'
yellow='\033[93m'
lightblue='\033[94m'
pink='\033[95m'
lightcyan='\033[96m'
class bg:
black='\033[40m'
red='\033[41m'
green='\033[42m'
orange='\033[43m'
blue='\033[44m'
purple='\033[45m'
cyan='\033[46m'
lightgrey='\033[47m'
@staticmethod
def filter(data):
return re.compile(r'\x1B\[[0-?]*[ -/]*[@-~]').sub('', str(data))
'''
Use the bitwise operators to merge these settings
'''
USE_ANSI = 0b100
OUTPUT_TO_CONSOLE = 0b010
OUTPUT_TO_FILE = 0b001
LEVEL_DEBUG = 1
LEVEL_INFO = 2
LEVEL_WARN = 3
LEVEL_ERROR = 4
LEVEL_FATAL = 5
_type = OUTPUT_TO_CONSOLE | USE_ANSI # the default settings for logging
_level = LEVEL_DEBUG # the lowest level to log
_outputfile = './output.log' # the file to log to
def set_settings(type):
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'''
Set the settings for the logger using bitwise operators
'''
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global _type
_type = type
def get_settings():
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'''
Get settings from the logger
'''
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return _type
def set_level(level):
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'''
Set the lowest log level to output
'''
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global _level
_level = level
def get_level():
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'''
Get the lowest log level currently being outputted
'''
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return _level
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def set_file(outputfile):
'''
Set the file to output to, if enabled
'''
global _outputfile
_outputfile = outputfile
def get_file():
'''
Get the file to output to
'''
return _outputfile
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def raw(data):
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'''
Outputs raw data to console without formatting
'''
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if get_settings() & OUTPUT_TO_CONSOLE:
print(data)
if get_settings() & OUTPUT_TO_FILE:
with open(_outputfile, "a+") as f:
f.write(colors.filter(data) + '\n')
def log(prefix, data, color = '', timestamp=True):
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'''
Logs the data
prefix : The prefix to the output
data : The actual data to output
color : The color to output before the data
'''
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curTime = ''
if timestamp:
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curTime = time.strftime("%m-%d %H:%M:%S") + ' '
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output = colors.reset + str(color) + '[' + colors.bold + str(prefix) + colors.reset + str(color) + '] ' + curTime + str(data) + colors.reset
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if not get_settings() & USE_ANSI:
output = colors.filter(output)
raw(output)
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def readline(message = ''):
'''
Takes in input from the console, not stored in logs
message: The message to display before taking input
'''
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color = colors.fg.green + colors.bold
output = colors.reset + str(color) + '... ' + colors.reset + str(message) + colors.reset
if not get_settings() & USE_ANSI:
output = colors.filter(output)
sys.stdout.write(output)
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return input()
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def confirm(default = 'y', message = 'Are you sure %s? '):
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'''
Displays an "Are you sure" message, returns True for Y and False for N
message: The confirmation message, use %s for (y/n)
default: which to prefer-- y or n
'''
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color = colors.fg.green + colors.bold
default = default.lower()
confirm = colors.bold
if default.startswith('y'):
confirm += '(Y/n)'
else:
confirm += '(y/N)'
confirm += colors.reset + color
output = colors.reset + str(color) + '... ' + colors.reset + str(message) + colors.reset
if not get_settings() & USE_ANSI:
output = colors.filter(output)
sys.stdout.write(output.replace('%s', confirm))
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inp = input().lower()
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if 'y' in inp:
return True
if 'n' in inp:
return False
else:
return default == 'y'
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# debug: when there is info that could be useful for debugging purposes only
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def debug(data, timestamp=True):
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if get_level() <= LEVEL_DEBUG:
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log('/', data, timestamp=timestamp)
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# info: when there is something to notify the user of, such as the success of a process
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def info(data, timestamp=False):
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if get_level() <= LEVEL_INFO:
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log('+', data, colors.fg.green, timestamp=timestamp)
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# warn: when there is a potential for something bad to happen
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def warn(data, timestamp=True):
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if get_level() <= LEVEL_WARN:
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log('!', data, colors.fg.orange, timestamp=timestamp)
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# error: when only one function, module, or process of the program encountered a problem and must stop
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def error(data, error=None, timestamp=True):
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if get_level() <= LEVEL_ERROR:
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log('-', data, colors.fg.red, timestamp=timestamp)
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if not error is None:
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debug('Error details: ' + str(error) + parse_error())
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# fatal: when the something so bad has happened that the prorgam must stop
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def fatal(data, timestamp=True):
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if get_level() <= LEVEL_FATAL:
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log('#', data, colors.bg.red + colors.fg.green + colors.bold, timestamp=timestamp)
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# returns a formatted error message
def parse_error():
details = traceback.extract_tb(sys.exc_info()[2])
output = ''
for line in details:
output += '\n ... module %s in %s:%i' % (line[2], line[0], line[1])
return output