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from apiclient.discovery import build
from apiclient import errors
from email.message import EmailMessage
from google.oauth2.credentials import Credentials
from google_auth_oauthlib.flow import InstalledAppFlow
import argparse
import base64
import email
import json
import oauth2client
import os
SCOPES = ["https://www.googleapis.com/auth/gmail.modify"]
CLIENT_SECRET_FILE = "secret.json"
APPLICATION_NAME = "Swaptions"
def get_gmail_service():
"""Gets valid user credentials from storage.
If nothing has been stored, or if the stored credentials are invalid,
the OAuth2 flow is completed to obtain the new credentials.
Returns:
Credentials, the obtained credential.
"""
credential_dir = ".credentials"
if not os.path.exists(credential_dir):
os.makedirs(credential_dir)
credential_path = os.path.join(
credential_dir, "guillaume.horel@serenitascapital.com.json"
)
try:
credentials = Credentials.from_authorized_user_file(credential_path)
except:
flow = InstalledAppFlow.from_client_secrets_file(CLIENT_SECRET_FILE, SCOPES)
credentials = flow.run_console()
to_save = {}
for attr in [
"token",
"refresh_token",
"id_token",
"token_uri",
"client_id",
"client_secret",
"scopes",
]:
to_save[attr] = getattr(credentials, attr)
with open(credential_path, "w") as fh:
json.dump(to_save, fh)
service = build("gmail", "v1", credentials=credentials)
return service
def ListMessagesWithLabels(service, user_id, label_ids=[]):
"""List all Messages of the user's mailbox with label_ids applied.
Args:
service: Authorized Gmail API service instance.
user_id: User's email address. The special value "me"
can be used to indicate the authenticated user.
label_ids: Only return Messages with these labelIds applied.
Returns:
List of Messages that have all required Labels applied. Note that the
returned list contains Message IDs, you must use get with the
appropriate id to get the details of a Message.
"""
try:
response = (
service.users()
.messages()
.list(userId=user_id, labelIds=label_ids)
.execute()
)
if "messages" in response:
yield from response["messages"]
while "nextPageToken" in response:
page_token = response["nextPageToken"]
response = (
service.users()
.messages()
.list(userId=user_id, labelIds=label_ids, pageToken=page_token)
.execute()
)
yield from response["messages"]
except errors.HttpError as error:
print(json.loads(error.content.decode("utf-8"))["error"]["message"])
def ListHistory(service, user_id, label_id=None, start_history_id=10000):
"""List History of all changes to the user's mailbox.
Args:
service: Authorized Gmail API service instance.
user_id: User's email address. The special value "me"
can be used to indicate the authenticated user.
start_history_id: Only return Histories at or after start_history_id.
Returns:
A list of mailbox changes that occurred after the start_history_id.
"""
history = (
service.users()
.history()
.list(
userId=user_id,
startHistoryId=start_history_id,
historyTypes="messageAdded",
labelId=label_id,
)
.execute()
)
changes = history["history"] if "history" in history else []
for change in changes:
if "messagesAdded" in change:
for c in change["messagesAdded"]:
yield c["message"]
while "nextPageToken" in history:
page_token = history["nextPageToken"]
history = (
service.users()
.history()
.list(userId=user_id, startHistoryId=start_history_id, pageToken=page_token)
.execute()
)
for change in history["history"]:
if "messagesAdded" in change:
for c in change["messagesAdded"]:
yield c["message"]
def labels_dict(service, user_id):
"""Returns a dictionary mapping labels to labelids.
Args:
service: Authorized Gmail API service instance.
user_id: User's email address. The special value "me"
Returns:
dictionary mapping labels to labelids.
"""
try:
response = service.users().labels().list(userId=user_id).execute()
labels = response["labels"]
return {label["name"]: label["id"] for label in labels}
except errors.HttpError as error:
print(json.loads(error.content.decode("utf-8"))["error"]["message"])
class GmailMessage(EmailMessage):
_service = None
_labels = None
def __init__(self):
super().__init__()
if GmailMessage._service is None:
GmailMessage._service = get_gmail_service()
if GmailMessage._labels is None:
GmailMessage._labels = labels_dict(self._service, "me")
def msgdict(self):
return {"raw": base64.urlsafe_b64encode(self.as_bytes()).decode()}
def send(self):
try:
message = (
self._service.users()
.messages()
.send(userId="me", body=self.msgdict())
.execute()
)
print("Message Id: %s" % message["id"])
except errors.HttpError as error:
print("An error occurred: %s" % error)
@classmethod
def list_msg_ids(cls, label, start_history_id=None):
if start_history_id is not None:
return ListHistory(
cls._service,
"me",
label_id=cls._labels[label],
start_history_id=start_history_id,
)
else:
return ListMessagesWithLabels(
cls._service, "me", label_ids=[cls._labels[label]]
)
@classmethod
def from_id(cls, msg_id, user_id="me"):
try:
message = (
cls._service.users()
.messages()
.get(userId=user_id, id=msg_id, format="raw")
.execute()
)
instance = email.message_from_bytes(
base64.urlsafe_b64decode(message["raw"]),
policy=email.policy.EmailPolicy(),
)
instance.history_id = message["historyId"]
return instance
except errors.HttpError as error:
print(json.loads(error.content.decode("utf-8"))["error"]["message"])
def main():
"""Shows basic usage of the Gmail API.
Creates a Gmail API service object and outputs a list of label names
of the user's Gmail account.
"""
message = GmailMessage()
message.set_content("Hello everyone!")
message["To"] = "guillaume.horel@gmail.com"
message["Subject"] = "pomme"
message.send()
if __name__ == "__main__":
message = main()
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