(20241127) Mail sending (with replies) tested :)
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"""
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AUTHOR:
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Khushal P Soonderji
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DATE:
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Tuesday, 16th Jul, 2024
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OBJECTIVE:
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To be able to send out mails from code.
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REFERENCES:
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N/A
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DOWNLOADS:
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N/A
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"""
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# *****************************************************************************************************************
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# ***** ****
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# *** IMPORT ***
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# ***** ****
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# *****************************************************************************************************************
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# To make sibling directories accessible for imports:
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import sys
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sys.path.append(".")
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sys.path.append("..")
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# For working with mails:
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from email.mime.multipart import MIMEMultipart
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from email.mime.image import MIMEImage
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from email.mime.text import MIMEText
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from email.mime.base import MIMEBase
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from email import encoders
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# For random strings:
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import string
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import random
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# For system-level activities:
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import os
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# For working with files in RAM:
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import io
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# To work with Base64 encoding:
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import base64
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# To work with datatypes:
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from typing import List
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# *****************************************************************************************************************
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# ***** ****
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# *** MACROS / ONE-TIME INIT ***
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# ***** ****
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# *****************************************************************************************************************
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# --- Nothing Yet
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# *****************************************************************************************************************
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# ***** ****
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# *** VARIABLES ***
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# ***** ****
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# *****************************************************************************************************************
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# --- Nothing Yet
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# *****************************************************************************************************************
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# ***** ****
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# *** FUNCTIONS ***
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# ***** ****
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# *****************************************************************************************************************
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# --- Nothing Yet
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# *****************************************************************************************************************
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# ***** ****
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# *** CLASSES ***
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# ***** ****
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# *****************************************************************************************************************
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class GMailMessage:
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def __init__(
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self,
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from_email: str,
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to_email: str,
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subject: str,
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cc_emails: List[str] = None,
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bcc_emails: List[str] = None
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):
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"""
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Create an instance of the message that you would like to send.
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:param from_email: The EMail ID of the sender.
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:param to_email: The EMail ID of the recipient.
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:param subject: The subject of the mail.
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:param cc_emails: A list of recipients to add to the CC section.
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:param bcc_emails: A list of recipients to add to the BCC section.
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"""
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# Create the instance of the message:
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self.message = MIMEMultipart()
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self.message["From"] = from_email
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self.message["To"] = to_email
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self.message["Subject"] = subject
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if cc_emails: self.message["CC"] = ",".join(cc_emails)
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if bcc_emails: self.message["BCC"] = ",".join(bcc_emails)
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# Note down the values for accessing later:
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self.__from = from_email
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self.__to = to_email
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self.__cc = cc_emails,
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self.__bcc = bcc_emails
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self.__subject = subject
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# ┏┓ •
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# ┃┃┏┓┏┓┏┓┏┓┏┓╋┓┏┓┏
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# ┣┛┛ ┗┛┣┛┗ ┛ ┗┗┗ ┛
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# ┛
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@property
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def from_mail(self):
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return self.__from
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@property
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def to_mail(self):
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return self.__to
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@property
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def cc_mails(self):
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return self.__cc
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@property
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def bcc_mails(self):
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return self.__bcc
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@property
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def subject(self):
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return self.__subject
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# ┏┓ ┓ ┓ ┏┓
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# ┣┫┏┫┏┫ ┃ ┏┓┏┓╋┏┓┏┓╋
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# ┛┗┗┻┗┻ ┗┛┗┛┛┗┗┗ ┛┗┗
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def add_text(self, text):
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"""
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Add plain-text to the mail body.
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:param text: The text to add to the mail body.
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:return: None.
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"""
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self.message.attach(MIMEText(text, "plain"))
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def add_html(self, html_text):
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"""
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Add HTML text to the mail body.
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:param html_text: The HTML text to add to the mail body.
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:return: None.
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"""
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self.message.attach(MIMEText(html_text, "html"))
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def add_inline_image(self, image_file, content_id = None):
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"""
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Add an inline image to the body of the mail.
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NOTE: This is NOT the same as sending an image as an attachment.
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:param image_file: The image data to attach to the mail body.
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:param content_id: Inline images are inserted via HTML bocks. This field identifies the image resource. If not
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specified, I will generate a random string. You may write a custom value here if you know what you are
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doing. For most use cases, please ignore this field.
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:return: None.
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"""
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# Read the image as bytes:
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image_bytes = None
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if type(image_file) is str:
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with open(image_file, "rb") as opened_image_file:
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image_bytes = opened_image_file.read()
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if type(image_file) is io.BytesIO:
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image_file.seek(0)
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image_bytes = image_file.getvalue()
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# Declare the part to be attached to the multipart message:
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if image_bytes is not None:
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# Create the HTML block if the image pointer is blank:
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if content_id is None:
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content_id = ''.join(random.choice(string.ascii_letters + string.digits) for _ in range(8))
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self.add_html(f"""
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<html>
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<body>
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<p><img src="cid:{content_id}"></p>
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</body>
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</html>
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""")
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# Then add the image:
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image_part = MIMEImage(image_bytes)
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image_part.add_header("Content-ID", f"<{content_id}>")
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self.message.attach(image_part)
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def add_attachment(
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self,
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attachment_file: str | io.BytesIO,
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file_name: str = None
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):
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"""
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Add a file as an attachment to the mail. This file, even if possible, will not be rendered on the screen in-line
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with the body. It will be made available as a download.
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:param attachment_file: The file that you would like to attach.
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:param file_name: The name of the file. This is the same name by which it will be downloaded. You need not
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specify this if the input file is specified as a path. Needed when you give the input file as a buffer.
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:return:
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"""
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# Declare the part to be attached to the multipart message:
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part = MIMEBase("application", "octet-stream")
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# If the attachment is a file stored in the local disk:
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if isinstance(attachment_file, str):
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file_name = file_name or os.path.split(attachment_file)[-1]
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with open(attachment_file, "rb") as attachment:
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part.set_payload(attachment.read())
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# If the file is held in RAM:
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elif isinstance(attachment_file, io.BytesIO):
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attachment_file.seek(0)
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part.set_payload(attachment_file.read())
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# Encode and attach the file:
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encoders.encode_base64(part)
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part.add_header(
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"Content-Disposition",
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f"attachment; filename= {file_name}",
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)
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self.message.attach(part)
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# ┏┓
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# ┣ ┏┓┏┓┏┳┓┏┓╋
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# ┻ ┗┛┛ ┛┗┗┗┻┗
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def get_raw_message(
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self,
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as_base64: bool = True
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):
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"""
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Get the raw string dump from the current contents of the message. This text will be compliant with RFC 5322 and
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RFC 2045 (among others).
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:param as_base64: If set to True, the response will be a URL-safe B64 output, else it'll be a raw string.
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:return: The standardized raw text dump. either as a raw string or as a Base64 (url-safe) string.
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"""
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if not as_base64: return self.message
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else: return base64.urlsafe_b64encode(self.message.as_bytes()).decode()
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# *****************************************************************************************************************
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# ***** ****
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# *** MAIN PROGRAM ***
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# ***** ****
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# *****************************************************************************************************************
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if __name__ == "__main__":
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my_mail = GMailMessage(
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from_email = "sender@gmail.com",
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to_email = "recipient@gmail.com",
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subject = "Bhopli is the best!",
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cc_emails = None,
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bcc_emails = None
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)
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my_mail.add_html(
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"""
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title>Sample HTML String</title>
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<style>
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.heading {
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color: #ff9025;
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}
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.sub-heading {
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color: #000000;
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}
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</style>
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</head>
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<body>
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<h1 class="heading">Hello, Bhopli!</h1>
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<h2 class="sub-heading">Bhopli is the best, most well-behaved cat in the known universe.</h2>
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</body>
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</html>
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"""
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)
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my_mail.add_text("This is how you should pet her 👇")
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my_mail.add_inline_image(r"../../../data/images/cat_petting.png")
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my_mail.add_attachment(r"../../../data/pdf/sample_label.pdf")
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print(my_mail.get_raw_message(as_base64 = True))
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