improved CSV output and error handling

src/brewserverblocklist/brewserverblocklist.py

@@ -8,11 +8,26 @@ of any number of other Friendica instances.
 
 See https://git.friendi.ca/tobias/brewserverblocklist
 """
+import argparse
 import configparser
 import sys
 from os.path import exists
 import requests
-from bargparse.bargparse import MyParser
+
+class BParser(argparse.ArgumentParser):
+    """
+    This expansion of the ArgParser class will display the --help results by
+    default if an error occurs (e.g. no arguments are passed to the script).
+
+    It is based on an StackOverflow answer from 2010 by unutbu who refered to
+    a reply from Steven Bethard as source of the code.
+
+    https://stackoverflow.com/questions/4042452/display-help-message-with-python-argparse-when-script-is-called-without-any-argu/4042861#4042861
+    """
+    def error(self, message):
+        sys.stderr.write('error: %s\n' % message)
+        self.print_help()
+        sys.exit(2)
 
 class BrewBlocklist():
     """
@@ -36,7 +51,6 @@ class BrewBlocklist():
         config = configparser.RawConfigParser()
         config.read(configfile)
         for section in config.sections():
-            print(section)
             section_values = dict(config.items(section))
             if (section.find('http://') > -1) or (section.find('https://') > -1):
                 print('The section name in the config file must not contain the protocol ({})'.format(section))
@@ -139,6 +153,12 @@ class BrewBlocklist():
             orig_stdout = sys.stdout
             sys.stdout = out_file
         for key, value in self.blocklist.items():
+            try:
+                if ("," in self.reasons[key] or " " in self.reasons[key]) and not self.reasons[key].startswith('"'):
+                    self.reasons[key] = '"{}"'.format(self.reasons[key])
+            except TypeError:
+                self.reasons[key] = '"no reason given"'
+                self.error.append("for {} no blocking reason was provided".format(key))
             print('{}, {}, {}'.format(key, self.reasons[key], value))
         if self.outputfile:
             sys.stdout = orig_stdout
@@ -157,7 +177,7 @@ def main():
     * collect the ingredient
     * serve the result
     """
-    parser = MyParser()
+    parser = BParser()
     parser.add_argument('-c', '--config',
                         dest='configfile',
                         required=True,