Added real logging class, instead of Log class.

ebook_converter/utils/logging.py

@@ -1,11 +1,14 @@
 """
 A simplified logging system
 """
-import sys
-import traceback
+import functools
 import io
 import os
-from functools import partial
+import sys
+import traceback
+
+# how about making it really simplified?
+import logging
 
 from ebook_converter import constants_old
 
@@ -16,6 +19,123 @@ WARN = 2
 ERROR = 3
 
 
+class CustomFormatter(logging.Formatter):
+    """Logging Formatter to add colors and count warning / errors"""
+
+    grey = "\x1b[38;21m"
+    yellow = "\x1b[33;21m"
+    red = "\x1b[31;21m"
+    bold_red = "\x1b[31;1m"
+    reset = "\x1b[0m"
+    fmt = "%(message)s"
+
+    FORMATS = {logging.DEBUG: grey + fmt + reset,
+               logging.INFO: grey + fmt + reset,
+               logging.WARNING: yellow + fmt + reset,
+               logging.ERROR: red + fmt + reset,
+               logging.CRITICAL: bold_red + fmt + reset}
+
+    def format(self, record):
+        log_fmt = self.FORMATS.get(record.levelno)
+        formatter = logging.Formatter(log_fmt)
+        return formatter.format(record)
+
+
+class Logger:
+    """
+    Logger class with output on console only
+    """
+    def __init__(self, logger_name, color=False):
+        """
+        Initialize named logger
+        """
+        self._log = logging.getLogger(logger_name)
+        self.setup_logger()
+        self._log.set_verbose = self.set_verbose
+
+    def __call__(self):
+        """
+        Calling this object will return configured logging.Logger object with
+        additional set_verbose() method.
+        """
+        return self._log
+
+    def set_verbose(self, verbose_level, quiet_level):
+        """
+        Change verbosity level. Default level is warning.
+        """
+        self._log.setLevel(logging.WARNING)
+
+        if quiet_level:
+            self._log.setLevel(logging.ERROR)
+            if quiet_level > 1:
+                self._log.setLevel(logging.CRITICAL)
+
+        if verbose_level:
+            self._log.setLevel(logging.INFO)
+            if verbose_level > 1:
+                self._log.setLevel(logging.DEBUG)
+
+    def setup_logger(self):
+        """
+        Create setup instance and make output meaningful :)
+        """
+        if self._log.handlers:
+            # need only one handler
+            return
+
+        console_handler = logging.StreamHandler(sys.stderr)
+        console_handler.set_name("console")
+        console_formatter = CustomFormatter()
+        console_handler.setFormatter(console_formatter)
+        self._log.addHandler(console_handler)
+        self._log.setLevel(logging.WARNING)
+
+
+BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE = range(8)
+
+#The background is set with 40 plus the number of the color, and the foreground with 30
+
+#These are the sequences need to get colored ouput
+RESET_SEQ = "\033[0m"
+COLOR_SEQ = "\033[1;%dm"
+BOLD_SEQ = "\033[1m"
+
+def formatter_message(message, use_color = True):
+    if use_color:
+        message = message.replace("$RESET", RESET_SEQ).replace("$BOLD",
+                                                               BOLD_SEQ)
+    else:
+        message = message.replace("$RESET", "").replace("$BOLD", "")
+    return message
+
+class ColoredFormatter(logging.Formatter):
+    COLORS = {'WARNING': YELLOW,
+              'INFO': WHITE,
+              'DEBUG': BLUE,
+              'CRITICAL': YELLOW,
+              'ERROR': RED}
+
+    def __init__(self, msg, use_color=True):
+        logging.Formatter.__init__(self, msg)
+        self.use_color = use_color
+
+    def format(self, record):
+        levelname = record.levelname
+        if self.use_color and levelname in self.COLORS:
+            levelname_color = COLOR_SEQ % (30 + self.COLORS[levelname]) + \
+                    levelname + RESET_SEQ
+            record.levelname = levelname_color
+        return logging.Formatter.format(self, record)
+
+
+
+
+
+
+
+
+
 class Stream(object):
 
     def __init__(self, stream=None):
@@ -85,10 +205,11 @@ class Log(object):
         default_output = ANSIStream()
         self.outputs = [default_output]
 
-        self.debug = partial(self.print_with_flush, DEBUG)
-        self.info = partial(self.print_with_flush, INFO)
-        self.warn = self.warning = partial(self.print_with_flush, WARN)
-        self.error = partial(self.print_with_flush, ERROR)
+        self.debug = functools.partial(self.print_with_flush, DEBUG)
+        self.info = functools.partial(self.print_with_flush, INFO)
+        self.warn = self.warning = functools.partial(self.print_with_flush,
+                                                     WARN)
+        self.error = functools.partial(self.print_with_flush, ERROR)
 
     def prints(self, level, *args, **kwargs):
         if level < self.filter_level:
@@ -129,4 +250,6 @@ class Log(object):
                 o.close()
 
 
-default_log = Log()
+default_log = Logger('ebook-converter')()
+# TODO(gryf): remove this after providing value from cmd line/config
+default_log.set_verbose(2, 0)