79 lines
3.0 KiB
Python
79 lines
3.0 KiB
Python
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import json, os, random, smtplib, ssl
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from email.message import EmailMessage
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from string import Template
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from config import Config as Config
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from secret import USERNAME, PASSWORD
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context = ssl.create_default_context()
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# Load data file
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data_path = os.path.normpath(Config.DATA)
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with open(data_path, 'r') as data_file:
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data = json.loads(data_file.read())
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print('Parsed data file.')
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if not data: raise Exception('Error: data file is empty.')
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# Randomise participants.
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participants = list(data.keys())
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random.shuffle(participants)
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# Create a derangement in the permutation by moving the first participant to the bottom
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derangement = list(participants)
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derangement.append(derangement.pop(0))
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# Create a dictionary pairing participants and gift recipients
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buying = {}
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for index, participant in enumerate(participants):
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buying[participant] = derangement[index]
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buying = {key: value for key, value in sorted(buying.items())}
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# Create output file
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output_path = os.path.normpath(Config.OUTPUT)
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with open(output_path, 'w') as output:
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output.write(json.dumps(buying, indent=4))
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# Parse Templates
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plain_path = os.path.normpath('./templates/plain.txt')
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with open(plain_path, 'r') as plain_file:
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plain_template = Template(plain_file.read())
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rich_path = os.path.normpath('./templates/rich.html')
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with open(rich_path, 'r') as rich_file:
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rich_template = Template(rich_file.read())
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def construct_message(participant, gift_recipient):
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message = EmailMessage()
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message['From'] = USERNAME
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if '@' in data[participant]['email']:
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participant_email = data[participant]['email']
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elif hasattr(Config,'EMAIL_DOMAIN') and Config.EMAIL_DOMAIN:
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participant_email = f'{data[participant]["email"]}@{Config.EMAIL_DOMAIN}'
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else:
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raise Exception(f'Error: Invalid email address for participant {participant}.')
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if hasattr(Config,'OVERRIDE_RECIPIENT') and Config.OVERRIDE_RECIPIENT and hasattr(Config,'RECIPIENT_EMAIL') and Config.RECIPIENT_EMAIL:
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message['To'] = Config.RECIPIENT_EMAIL
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else: message['To'] = participant_email
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message['Subject'] = Config.SUBJECT
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preference = 'None' if not data[gift_recipient].get('preference') else data[gift_recipient].get('preference')
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template_substitutions = {
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'subject': Config.SUBJECT,
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'greeting': Config.GREETING,
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'participant': participant.title(),
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'gift_recipient': gift_recipient.title(),
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'preference': preference,
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'sender': Config.SENDER
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}
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body_html = rich_template.substitute(template_substitutions)
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body_plain = plain_template.substitute(template_substitutions)
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message.set_content(body_plain)
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message.add_alternative(body_html, subtype='html')
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return message
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messages = [construct_message(participant=participant, gift_recipient=gift_recipient) for participant, gift_recipient in buying.items()]
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with smtplib.SMTP_SSL(Config.SERVER, Config.PORT, context=context) as smtp:
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smtp.login(user=USERNAME, password=PASSWORD)
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for message in messages: smtp.send_message(message)
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smtp.quit()
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