Add colorful log output

Highlight the important operations (new, modified) in different colours.

PFERD/utils.py

@@ -1,5 +1,8 @@
 import os
+import sys
 import pathlib
+from colorama import Style
+from colorama import Fore
 
 __all__ = [
     "get_base_dir",
@@ -8,6 +11,7 @@ __all__ = [
     "stream_to_path",
     "ContentTypeException",
     "FileNotFoundException",
+    "PrettyLogger",
 ]
 
 def get_base_dir(script_file):
@@ -26,8 +30,35 @@ def stream_to_path(response, to_path, chunk_size=1024**2):
         for chunk in response.iter_content(chunk_size=chunk_size):
             fd.write(chunk)
 
+def isOutputPipe():
+    """Returns whether this program's output is attached to a pipe.
+    """
+    return sys.stdout.isatty
+
 class ContentTypeException(Exception):
     pass
 
 class FileNotFoundException(Exception):
     pass
+
+class PrettyLogger:
+
+    def __init__(self, logger):
+        self.logger = logger
+
+    def modified_file(self, file_name):
+        self.logger.info(f"{Fore.MAGENTA}{Style.BRIGHT}Modified {file_name}.{Style.RESET_ALL}")
+
+    def new_file(self, file_name):
+        self.logger.info(f"{Fore.GREEN}{Style.BRIGHT}Created {file_name}.{Style.RESET_ALL}")
+
+    def ignored_file(self, file_name):
+        self.logger.info(f"{Style.DIM}Ignored {file_name}.{Style.RESET_ALL}")
+
+    def starting_synchronizer(self, target_directory, synchronizer_name, subject=None):
+        subject_str = f"{subject} " if subject else ""
+        self.logger.info("")
+        self.logger.info((
+            f"{Fore.CYAN}{Style.BRIGHT}Synchronizing {subject_str}to {target_directory}"
+            f" using the {synchronizer_name} synchronizer.{Style.RESET_ALL}"
+        ))