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add two arguments to send only if csv is empty and also not send if i… #1

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39 changes: 27 additions & 12 deletions redash_emailer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -45,6 +45,10 @@ def split_rows_by_column(rows, column):
parser.add_argument('--smtp_login', dest='smtp_login', help='SMTP login', default=getattr(settings, 'SMTP_LOGIN', ''))
parser.add_argument('--smtp_password', dest='smtp_password', help='SMTP login', default=getattr(settings, 'SMTP_PASSWORD', ''))
parser.add_argument('--smtp_port', dest='smtp_port', help='SMTP login', default=getattr(settings, 'SMTP_PORT', 587))
parser.add_argument('--send_on_empty', dest='send_on_empty', help='Send mailing even if empty results (default:True)',
default=True)
parser.add_argument('--send_only_on_empty', dest='send_only_on_empty',
help=('Send mailing ONLY for empty results. This is useful when using for alarms'), default=False)

args = parser.parse_args()
args.smtp_port = int(args.smtp_port)
Expand All @@ -69,6 +73,8 @@ def split_rows_by_column(rows, column):
print('Sender email address %s' % required_text)
required_inputs = False

send_on_empty = (args.send_on_empty.lower() in ('0', 'false', 'no', 'f', 'n'))

if required_inputs:
results = get_redash_results_for_query(args.domain,
args.query_id,
Expand All @@ -79,6 +85,13 @@ def split_rows_by_column(rows, column):
else:
rows_by_recipient = split_rows_by_column(rows, args.to_address)

empty = not len(rows)
if empty:
if not send_on_empty:
exit()
elif args.send_only_on_empty:
exit() # not empty, so skipping

server = smtplib.SMTP(args.smtp_host, args.smtp_port)
server.ehlo()
server.starttls()
Expand All @@ -93,18 +106,20 @@ def split_rows_by_column(rows, column):
msg['From'] = args.from_address
msg['To'] = recipient
msg.attach(MIMEText(args.body, 'plain'))
csv_file = io.StringIO()
csv_writer = csv.writer(csv_file, quoting=csv.QUOTE_NONNUMERIC)
keys = list(rows[0].keys())
csv_writer.writerow(keys)
for row in rows:
csv_writer.writerow([row[key] for key in keys])
csv_attachment = MIMEBase('application', 'octet-stream')
csv_attachment.set_payload(csv_file.getvalue())
encoders.encode_base64(csv_attachment)
csv_attachment.add_header('Content-Disposition', 'attachment',
filename=filename)
msg.attach(csv_attachment)
if not empty:
csv_file = io.StringIO()
csv_writer = csv.writer(csv_file, quoting=csv.QUOTE_NONNUMERIC)
keys = list(rows[0].keys())
csv_writer.writerow(keys)
for row in rows:
csv_writer.writerow([row[key] for key in keys])
csv_attachment = MIMEBase('application', 'octet-stream')
csv_attachment.set_payload(csv_file.getvalue())
encoders.encode_base64(csv_attachment)
csv_attachment.add_header('Content-Disposition', 'attachment',
filename=filename)
msg.attach(csv_attachment)

server.sendmail(args.from_address, msg['To'], msg.as_string())

server.quit()