mails.py: continued experimenting, trying content encodings

mossutils/mails.py

 import logging
 import mailbox
+# import quopri
 import os
-import pathlib 
+import pathlib
+import glob
+import csv
 from .utils import logging as logutils
 
-DEFAULT_MAIL_BODY_FILE="mail_per_cluster.txt"
+DEFAULT_CLUSTER_FILES_DIR="_clusters"
+DEFAULT_CLUSTER_STUDENTS_CSV_FILE_GLOB="cluster-students-[0-9]*.csv"
+DEFAULT_MAIL_BODY_FILE="./_static/cluster_mail.txt"
 DEFAULT_STUDENTS_RECEIVE_MAILS_AS_HEADER="To" # To, CC, BCC
+DEFAULT_SENDER="malte.schwerhoff@inf.ethz.ch"
+DEFAULT_SUBJECT="You've been caught!"
 
 def main(
+    cluster_files_dir=DEFAULT_CLUSTER_FILES_DIR,
+    cluster_students_csv_file_glob=DEFAULT_CLUSTER_STUDENTS_CSV_FILE_GLOB,
     mail_body_file=DEFAULT_MAIL_BODY_FILE,
-    students_receive_mails_as_header=DEFAULT_STUDENTS_RECEIVE_MAILS_AS_HEADER):
+    students_receive_mails_as_header=DEFAULT_STUDENTS_RECEIVE_MAILS_AS_HEADER,
+    sender=DEFAULT_SENDER,
+    subject=DEFAULT_SUBJECT):
+
   logutils.configure_level_and_format()
 
   unsent_mbox = "D:\\Program_Data\\Thunderbird Portable\\Data\\profile\\Mail\\Local Folders\\Unsent Messages"
@@ -18,9 +30,9 @@ def main(
   mbox_msf_path = pathlib.Path(unsent_mbox + ".msf")
 
   logging.warn("ATTENTION: If you continue, the files")
-  logging.warn("  {}")
-  logging.warn("  {}")
-  logging.warn("will be overwritten, if they exist. Make sure that do not have any pending unsent messages!".format(mbox_path, mbox_msf_path))
+  logging.warn("  {}".format(mbox_path))
+  logging.warn("  {}".format(mbox_msf_path))
+  logging.warn("will be overwritten, if they exist. Make sure that do not have any pending unsent messages!")
   
   if (input("Do you want to continue (enter 'yes')? ").lower() != "yes"):
     logging.debug("Exiting program because user did not confirm to continue")
@@ -36,27 +48,34 @@ def main(
   mbox = mailbox.mbox(mbox_path)
   mbox.lock()
   try:
-    msg = mailbox.mboxMessage()
-    msg.set_unixfrom("author Sat Feb  7 01:05:34 2009")
-    msg["From"] = "malte@schwerhoff.de"
-    msg["To"] = "scmalte@inf.ethz.ch, malte.schwerhoff@inf.ethz.h"
-    msg["Subject"] = "Sample message 1"
-    msg.set_payload("This is the body.\\nFrom (should be escaped).\nThere are 3 lines.\n")
-    mbox.add(msg)
-    mbox.flush()
-
-    msg = mailbox.mboxMessage()
-    msg.set_unixfrom("author")
-    msg["From"] = "malte@schwerhoff.de"
-    msg["To"] = "mun123456789@gmail.com"
-    msg["CC"] = "scmalte@inf.ethz.ch"
-    msg["BCC"] = "malte.schwerhoff@inf.ethz.h"
-    msg["Subject"] = "Sample message 2"
-    msg.set_payload(mail_body)
-    mbox.add(msg)
-    mbox.flush()
+    cluster_students_glob = os.path.join(cluster_files_dir, cluster_students_csv_file_glob)
+
+    logging.info("Taking students per cluster from files {}".format(cluster_students_glob))
+
+    for students_per_cluster_csv in glob.iglob(cluster_students_glob):
+      with open(students_per_cluster_csv, newline='') as csv_fh:
+        cluster_csv = list(csv.DictReader(csv_fh))
+
+      recipients = ", ".join([row["Email"] for row in cluster_csv])
+      logging.info("Creating mail to {}".format(recipients))
+
+      msg = mailbox.mboxMessage()
+      # msg.set_unixfrom("author Sat Feb  7 01:05:34 2009")
+      msg["From"] = sender
+      msg["Subject"] = subject
+      msg[students_receive_mails_as_header] = recipients
+      # msg["Content-Transfer-Encoding"] = "quoted-printable"
+      msg["Content-Type"] = "text/plain; charset=utf-8"
+      msg["Content-Transfer-Encoding"] = "quoted-printable"
+      msg["Content-Disposition"] = "inline"
+      msg["MIME-Version"] = "1.0"
+      msg.set_payload(mail_body)
+      mbox.add(msg)
+      mbox.flush()
+
   finally:
     mbox.unlock()
 
+
 if __name__ == "__main__":
   main()