From 2a1d31457cfbf051951f16f05a7ff93315c8e80c Mon Sep 17 00:00:00 2001
From: "W. Trevor King" <wking@tremily.us>
Date: Tue, 24 Apr 2012 18:02:09 -0400
Subject: [PATCH] Add --respond option to pg.py's mailpipe command.

---
 bin/pg.py         | 11 +++++++++++
 pygrader/email.py | 12 ++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/bin/pg.py b/bin/pg.py
index 5980b01..077b3e3 100755
--- a/bin/pg.py
+++ b/bin/pg.py
@@ -32,6 +32,7 @@ import pgp_mime as _pgp_mime
 from pygrader import __version__
 from pygrader import LOG as _LOG
 from pygrader.email import test_smtp as _test_smtp
+from pygrader.email import Responder as _Responder
 from pygrader.mailpipe import mailpipe as _mailpipe
 from pygrader.storage import initialize as _initialize
 from pygrader.storage import load_course as _load_course
@@ -137,6 +138,10 @@ if __name__ == '__main__':
         '-l', '--max-late', default=0, type=float,
         help=('Grace period in seconds before an incoming assignment is '
               'actually marked as late'))
+    mailpipe_parser.add_argument(
+        '-r', '--respond', default=False, action='store_const', const=True,
+        help=('Send automatic response emails to acknowledge incomming '
+              'messages.'))
 
     todo_parser = subparsers.add_parser(
         'todo', help=_todo.__doc__.splitlines()[0])
@@ -215,6 +220,12 @@ if __name__ == '__main__':
         kwargs['smtp'] = _pgp_mime.get_smtp(*params)
         del params
 
+    if hasattr(args, 'respond') and getattr(args, 'respond'):
+        kwargs['respond'] = _Responder(
+            smtp=kwargs.get('smtp', None),
+            use_color=kwargs.get('use_color', False),
+            dry_run=kwargs.get('dry_run', False))
+
     _LOG.debug('execute {} with {}'.format(args.func, kwargs))
     try:
         ret = args.func(**kwargs)
diff --git a/pygrader/email.py b/pygrader/email.py
index 4fab66b..aeb4da8 100644
--- a/pygrader/email.py
+++ b/pygrader/email.py
@@ -111,6 +111,18 @@ def send_emails(emails, smtp=None, use_color=None, debug_target=None,
             if callback:
                 callback(None)
 
+
+class Responder (object):
+    def __init__(self, *args, **kwargs):
+        self.args = args
+        if kwargs is None:
+            kwargs = {}
+        self.kwargs = kwargs
+
+    def __call__(self, message):
+        send_emails([(message, None)], *self.args, **self.kwargs)
+
+
 def get_address(person, header=False):
     r"""
     >>> from pygrader.model.person import Person as Person
-- 
2.26.2