from datetime import datetime from ..exceptions import AnymailRequestsAPIError from ..message import ANYMAIL_STATUSES, AnymailRecipientStatus from ..utils import get_anymail_setting from .base_requests import AnymailRequestsBackend, RequestsPayload class EmailBackend(AnymailRequestsBackend): """ Mandrill API Email Backend """ esp_name = "Mandrill" def __init__(self, **kwargs): """Init options from Django settings""" esp_name = self.esp_name self.api_key = get_anymail_setting( "api_key", esp_name=esp_name, kwargs=kwargs, allow_bare=True ) api_url = get_anymail_setting( "api_url", esp_name=esp_name, kwargs=kwargs, default="https://mandrillapp.com/api/1.0", ) if not api_url.endswith("/"): api_url += "/" super().__init__(api_url, **kwargs) def build_message_payload(self, message, defaults): return MandrillPayload(message, defaults, self) def parse_recipient_status(self, response, payload, message): parsed_response = self.deserialize_json_response(response, payload, message) recipient_status = {} try: # Mandrill returns a list of { email, status, _id, reject_reason } # for each recipient for item in parsed_response: email = item["email"] status = item["status"] if status not in ANYMAIL_STATUSES: status = "unknown" # "_id" can be missing for invalid/rejected recipients: message_id = item.get("_id", None) recipient_status[email] = AnymailRecipientStatus( message_id=message_id, status=status ) except (KeyError, TypeError) as err: raise AnymailRequestsAPIError( "Invalid Mandrill API response format", email_message=message, payload=payload, response=response, backend=self, ) from err return recipient_status def encode_date_for_mandrill(dt): """Format a datetime for use as a Mandrill API date field Mandrill expects "YYYY-MM-DD HH:MM:SS" in UTC """ if isinstance(dt, datetime): dt = dt.replace(microsecond=0) if dt.utcoffset() is not None: dt = (dt - dt.utcoffset()).replace(tzinfo=None) return dt.isoformat(" ") else: return dt class MandrillPayload(RequestsPayload): def __init__(self, *args, **kwargs): self.esp_extra = {} # late-bound in serialize_data super().__init__(*args, **kwargs) def get_api_endpoint(self): if "template_name" in self.data: return "messages/send-template.json" else: return "messages/send.json" def serialize_data(self): self.process_esp_extra() if self.is_batch(): # hide recipients from each other self.data["message"]["preserve_recipients"] = False return self.serialize_json(self.data) # # Payload construction # def init_payload(self): self.data = { "key": self.backend.api_key, "message": {}, } def set_from_email(self, email): self.data["message"]["from_email"] = email.addr_spec if email.display_name: self.data["message"]["from_name"] = email.display_name def add_recipient(self, recipient_type, email): assert recipient_type in ["to", "cc", "bcc"] recipient_data = {"email": email.addr_spec, "type": recipient_type} if email.display_name: recipient_data["name"] = email.display_name to_list = self.data["message"].setdefault("to", []) to_list.append(recipient_data) def set_subject(self, subject): self.data["message"]["subject"] = subject def set_reply_to(self, emails): if emails: reply_to = ", ".join([str(email) for email in emails]) self.data["message"].setdefault("headers", {})["Reply-To"] = reply_to def set_extra_headers(self, headers): self.data["message"].setdefault("headers", {}).update(headers) def set_text_body(self, body): self.data["message"]["text"] = body def set_html_body(self, body): if "html" in self.data["message"]: # second html body could show up through multiple alternatives, # or html body + alternative self.unsupported_feature("multiple html parts") self.data["message"]["html"] = body def add_attachment(self, attachment): if attachment.inline: field = "images" name = attachment.cid else: field = "attachments" name = attachment.name or "" self.data["message"].setdefault(field, []).append( { "type": attachment.mimetype, "name": name, "content": attachment.b64content, } ) def set_envelope_sender(self, email): # Only the domain is used self.data["message"]["return_path_domain"] = email.domain def set_metadata(self, metadata): self.data["message"]["metadata"] = metadata def set_send_at(self, send_at): self.data["send_at"] = encode_date_for_mandrill(send_at) def set_tags(self, tags): self.data["message"]["tags"] = tags def set_track_clicks(self, track_clicks): self.data["message"]["track_clicks"] = track_clicks def set_track_opens(self, track_opens): self.data["message"]["track_opens"] = track_opens def set_template_id(self, template_id): self.data["template_name"] = template_id self.data.setdefault("template_content", []) # Mandrill requires something here def set_merge_data(self, merge_data): self.data["message"]["merge_vars"] = [ { "rcpt": rcpt, "vars": [ # sort for testing reproducibility: {"name": key, "content": rcpt_data[key]} for key in sorted(rcpt_data.keys()) ], } for rcpt, rcpt_data in merge_data.items() ] def set_merge_global_data(self, merge_global_data): self.data["message"]["global_merge_vars"] = [ {"name": var, "content": value} for var, value in merge_global_data.items() ] def set_merge_metadata(self, merge_metadata): # recipient_metadata format is similar to, but not quite the same as, # merge_vars: self.data["message"]["recipient_metadata"] = [ {"rcpt": rcpt, "values": rcpt_data} for rcpt, rcpt_data in merge_metadata.items() ] def set_esp_extra(self, extra): # late bind in serialize_data, so that obsolete Djrill attrs can contribute self.esp_extra = extra def process_esp_extra(self): if self.esp_extra is not None and len(self.esp_extra) > 0: esp_extra = self.esp_extra # Convert pythonic template_content dict to Mandrill name/content list try: template_content = esp_extra["template_content"] except KeyError: pass else: # if it's dict-like: if hasattr(template_content, "items"): if esp_extra is self.esp_extra: # don't modify caller's value esp_extra = self.esp_extra.copy() esp_extra["template_content"] = [ {"name": var, "content": value} for var, value in template_content.items() ] # Convert pythonic recipient_metadata dict to Mandrill rcpt/values list try: recipient_metadata = esp_extra["message"]["recipient_metadata"] except KeyError: pass else: # if it's dict-like: if hasattr(recipient_metadata, "keys"): if esp_extra["message"] is self.esp_extra["message"]: # don't modify caller's value: esp_extra["message"] = self.esp_extra["message"].copy() # For testing reproducibility, sort the recipients esp_extra["message"]["recipient_metadata"] = [ {"rcpt": rcpt, "values": recipient_metadata[rcpt]} for rcpt in sorted(recipient_metadata.keys()) ] # Merge esp_extra with payload data: shallow merge within ['message'] # and top-level keys self.data.update({k: v for k, v in esp_extra.items() if k != "message"}) try: self.data["message"].update(esp_extra["message"]) except KeyError: pass