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import base64
from email.utils import parseaddr
from typing import List
from google.oauth2.credentials import Credentials
from googleapiclient.discovery import build
from pydantic import BaseModel
from backend.data.block import Block, BlockCategory, BlockOutput, BlockSchema
from backend.data.model import SchemaField
from ._auth import (
GOOGLE_OAUTH_IS_CONFIGURED,
TEST_CREDENTIALS,
TEST_CREDENTIALS_INPUT,
GoogleCredentials,
GoogleCredentialsField,
GoogleCredentialsInput,
)
class Attachment(BaseModel):
filename: str
content_type: str
size: int
attachment_id: str
class Email(BaseModel):
id: str
subject: str
snippet: str
from_: str
to: str
date: str
body: str = "" # Default to an empty string
sizeEstimate: int
attachments: List[Attachment]
class GmailReadBlock(Block):
class Input(BlockSchema):
credentials: GoogleCredentialsInput = GoogleCredentialsField(
["https://www.googleapis.com/auth/gmail.readonly"]
)
query: str = SchemaField(
description="Search query for reading emails",
default="is:unread",
)
max_results: int = SchemaField(
description="Maximum number of emails to retrieve",
default=10,
)
class Output(BlockSchema):
email: Email = SchemaField(
description="Email data",
)
emails: list[Email] = SchemaField(
description="List of email data",
)
error: str = SchemaField(
description="Error message if any",
)
def __init__(self):
super().__init__(
id="25310c70-b89b-43ba-b25c-4dfa7e2a481c",
description="This block reads emails from Gmail.",
categories={BlockCategory.COMMUNICATION},
disabled=not GOOGLE_OAUTH_IS_CONFIGURED,
input_schema=GmailReadBlock.Input,
output_schema=GmailReadBlock.Output,
test_input={
"query": "is:unread",
"max_results": 5,
"credentials": TEST_CREDENTIALS_INPUT,
},
test_credentials=TEST_CREDENTIALS,
test_output=[
(
"email",
{
"id": "1",
"subject": "Test Email",
"snippet": "This is a test email",
"from_": "test@example.com",
"to": "recipient@example.com",
"date": "2024-01-01",
"body": "This is a test email",
"sizeEstimate": 100,
"attachments": [],
},
),
(
"emails",
[
{
"id": "1",
"subject": "Test Email",
"snippet": "This is a test email",
"from_": "test@example.com",
"to": "recipient@example.com",
"date": "2024-01-01",
"body": "This is a test email",
"sizeEstimate": 100,
"attachments": [],
}
],
),
],
test_mock={
"_read_emails": lambda *args, **kwargs: [
{
"id": "1",
"subject": "Test Email",
"snippet": "This is a test email",
"from_": "test@example.com",
"to": "recipient@example.com",
"date": "2024-01-01",
"body": "This is a test email",
"sizeEstimate": 100,
"attachments": [],
}
],
"_send_email": lambda *args, **kwargs: {"id": "1", "status": "sent"},
},
)
def run(
self, input_data: Input, *, credentials: GoogleCredentials, **kwargs
) -> BlockOutput:
service = self._build_service(credentials, **kwargs)
messages = self._read_emails(service, input_data.query, input_data.max_results)
for email in messages:
yield "email", email
yield "emails", messages
@staticmethod
def _build_service(credentials: GoogleCredentials, **kwargs):
creds = Credentials(
token=(
credentials.access_token.get_secret_value()
if credentials.access_token
else None
),
refresh_token=(
credentials.refresh_token.get_secret_value()
if credentials.refresh_token
else None
),
token_uri="https://oauth2.googleapis.com/token",
client_id=kwargs.get("client_id"),
client_secret=kwargs.get("client_secret"),
scopes=credentials.scopes,
)
return build("gmail", "v1", credentials=creds)
def _read_emails(
self, service, query: str | None, max_results: int | None
) -> list[Email]:
results = (
service.users()
.messages()
.list(userId="me", q=query or "", maxResults=max_results or 10)
.execute()
)
messages = results.get("messages", [])
email_data = []
for message in messages:
msg = (
service.users()
.messages()
.get(userId="me", id=message["id"], format="full")
.execute()
)
headers = {
header["name"].lower(): header["value"]
for header in msg["payload"]["headers"]
}
attachments = self._get_attachments(service, msg)
email = Email(
id=msg["id"],
subject=headers.get("subject", "No Subject"),
snippet=msg["snippet"],
from_=parseaddr(headers.get("from", ""))[1],
to=parseaddr(headers.get("to", ""))[1],
date=headers.get("date", ""),
body=self._get_email_body(msg),
sizeEstimate=msg["sizeEstimate"],
attachments=attachments,
)
email_data.append(email)
return email_data
def _get_email_body(self, msg):
if "parts" in msg["payload"]:
for part in msg["payload"]["parts"]:
if part["mimeType"] == "text/plain":
return base64.urlsafe_b64decode(part["body"]["data"]).decode(
"utf-8"
)
elif msg["payload"]["mimeType"] == "text/plain":
return base64.urlsafe_b64decode(msg["payload"]["body"]["data"]).decode(
"utf-8"
)
return "This email does not contain a text body."
def _get_attachments(self, service, message):
attachments = []
if "parts" in message["payload"]:
for part in message["payload"]["parts"]:
if part["filename"]:
attachment = Attachment(
filename=part["filename"],
content_type=part["mimeType"],
size=int(part["body"].get("size", 0)),
attachment_id=part["body"]["attachmentId"],
)
attachments.append(attachment)
return attachments
# Add a new method to download attachment content
def download_attachment(self, service, message_id: str, attachment_id: str):
attachment = (
service.users()
.messages()
.attachments()
.get(userId="me", messageId=message_id, id=attachment_id)
.execute()
)
file_data = base64.urlsafe_b64decode(attachment["data"].encode("UTF-8"))
return file_data
class GmailSendBlock(Block):
class Input(BlockSchema):
credentials: GoogleCredentialsInput = GoogleCredentialsField(
["https://www.googleapis.com/auth/gmail.send"]
)
to: str = SchemaField(
description="Recipient email address",
)
subject: str = SchemaField(
description="Email subject",
)
body: str = SchemaField(
description="Email body",
)
class Output(BlockSchema):
result: dict = SchemaField(
description="Send confirmation",
)
error: str = SchemaField(
description="Error message if any",
)
def __init__(self):
super().__init__(
id="6c27abc2-e51d-499e-a85f-5a0041ba94f0",
description="This block sends an email using Gmail.",
categories={BlockCategory.COMMUNICATION},
input_schema=GmailSendBlock.Input,
output_schema=GmailSendBlock.Output,
disabled=not GOOGLE_OAUTH_IS_CONFIGURED,
test_input={
"to": "recipient@example.com",
"subject": "Test Email",
"body": "This is a test email sent from GmailSendBlock.",
"credentials": TEST_CREDENTIALS_INPUT,
},
test_credentials=TEST_CREDENTIALS,
test_output=[
("result", {"id": "1", "status": "sent"}),
],
test_mock={
"_send_email": lambda *args, **kwargs: {"id": "1", "status": "sent"},
},
)
def run(
self, input_data: Input, *, credentials: GoogleCredentials, **kwargs
) -> BlockOutput:
service = GmailReadBlock._build_service(credentials, **kwargs)
send_result = self._send_email(
service, input_data.to, input_data.subject, input_data.body
)
yield "result", send_result
def _send_email(self, service, to: str, subject: str, body: str) -> dict:
if not to or not subject or not body:
raise ValueError("To, subject, and body are required for sending an email")
message = self._create_message(to, subject, body)
sent_message = (
service.users().messages().send(userId="me", body=message).execute()
)
return {"id": sent_message["id"], "status": "sent"}
def _create_message(self, to: str, subject: str, body: str) -> dict:
import base64
from email.mime.text import MIMEText
message = MIMEText(body)
message["to"] = to
message["subject"] = subject
raw_message = base64.urlsafe_b64encode(message.as_bytes()).decode("utf-8")
return {"raw": raw_message}
class GmailListLabelsBlock(Block):
class Input(BlockSchema):
credentials: GoogleCredentialsInput = GoogleCredentialsField(
["https://www.googleapis.com/auth/gmail.labels"]
)
class Output(BlockSchema):
result: list[dict] = SchemaField(
description="List of labels",
)
error: str = SchemaField(
description="Error message if any",
)
def __init__(self):
super().__init__(
id="3e1c2c1c-c689-4520-b956-1f3bf4e02bb7",
description="This block lists all labels in Gmail.",
categories={BlockCategory.COMMUNICATION},
input_schema=GmailListLabelsBlock.Input,
output_schema=GmailListLabelsBlock.Output,
disabled=not GOOGLE_OAUTH_IS_CONFIGURED,
test_input={
"credentials": TEST_CREDENTIALS_INPUT,
},
test_credentials=TEST_CREDENTIALS,
test_output=[
(
"result",
[
{"id": "Label_1", "name": "Important"},
{"id": "Label_2", "name": "Work"},
],
),
],
test_mock={
"_list_labels": lambda *args, **kwargs: [
{"id": "Label_1", "name": "Important"},
{"id": "Label_2", "name": "Work"},
],
},
)
def run(
self, input_data: Input, *, credentials: GoogleCredentials, **kwargs
) -> BlockOutput:
service = GmailReadBlock._build_service(credentials, **kwargs)
labels = self._list_labels(service)
yield "result", labels
def _list_labels(self, service) -> list[dict]:
results = service.users().labels().list(userId="me").execute()
labels = results.get("labels", [])
return [{"id": label["id"], "name": label["name"]} for label in labels]
class GmailAddLabelBlock(Block):
class Input(BlockSchema):
credentials: GoogleCredentialsInput = GoogleCredentialsField(
["https://www.googleapis.com/auth/gmail.modify"]
)
message_id: str = SchemaField(
description="Message ID to add label to",
)
label_name: str = SchemaField(
description="Label name to add",
)
class Output(BlockSchema):
result: dict = SchemaField(
description="Label addition result",
)
error: str = SchemaField(
description="Error message if any",
)
def __init__(self):
super().__init__(
id="f884b2fb-04f4-4265-9658-14f433926ac9",
description="This block adds a label to a Gmail message.",
categories={BlockCategory.COMMUNICATION},
input_schema=GmailAddLabelBlock.Input,
output_schema=GmailAddLabelBlock.Output,
disabled=not GOOGLE_OAUTH_IS_CONFIGURED,
test_input={
"message_id": "12345",
"label_name": "Important",
"credentials": TEST_CREDENTIALS_INPUT,
},
test_credentials=TEST_CREDENTIALS,
test_output=[
(
"result",
{"status": "Label added successfully", "label_id": "Label_1"},
),
],
test_mock={
"_add_label": lambda *args, **kwargs: {
"status": "Label added successfully",
"label_id": "Label_1",
},
},
)
def run(
self, input_data: Input, *, credentials: GoogleCredentials, **kwargs
) -> BlockOutput:
service = GmailReadBlock._build_service(credentials, **kwargs)
result = self._add_label(service, input_data.message_id, input_data.label_name)
yield "result", result
def _add_label(self, service, message_id: str, label_name: str) -> dict:
label_id = self._get_or_create_label(service, label_name)
service.users().messages().modify(
userId="me", id=message_id, body={"addLabelIds": [label_id]}
).execute()
return {"status": "Label added successfully", "label_id": label_id}
def _get_or_create_label(self, service, label_name: str) -> str:
label_id = self._get_label_id(service, label_name)
if not label_id:
label = (
service.users()
.labels()
.create(userId="me", body={"name": label_name})
.execute()
)
label_id = label["id"]
return label_id
def _get_label_id(self, service, label_name: str) -> str | None:
results = service.users().labels().list(userId="me").execute()
labels = results.get("labels", [])
for label in labels:
if label["name"] == label_name:
return label["id"]
return None
class GmailRemoveLabelBlock(Block):
class Input(BlockSchema):
credentials: GoogleCredentialsInput = GoogleCredentialsField(
["https://www.googleapis.com/auth/gmail.modify"]
)
message_id: str = SchemaField(
description="Message ID to remove label from",
)
label_name: str = SchemaField(
description="Label name to remove",
)
class Output(BlockSchema):
result: dict = SchemaField(
description="Label removal result",
)
error: str = SchemaField(
description="Error message if any",
)
def __init__(self):
super().__init__(
id="0afc0526-aba1-4b2b-888e-a22b7c3f359d",
description="This block removes a label from a Gmail message.",
categories={BlockCategory.COMMUNICATION},
input_schema=GmailRemoveLabelBlock.Input,
output_schema=GmailRemoveLabelBlock.Output,
disabled=not GOOGLE_OAUTH_IS_CONFIGURED,
test_input={
"message_id": "12345",
"label_name": "Important",
"credentials": TEST_CREDENTIALS_INPUT,
},
test_credentials=TEST_CREDENTIALS,
test_output=[
(
"result",
{"status": "Label removed successfully", "label_id": "Label_1"},
),
],
test_mock={
"_remove_label": lambda *args, **kwargs: {
"status": "Label removed successfully",
"label_id": "Label_1",
},
},
)
def run(
self, input_data: Input, *, credentials: GoogleCredentials, **kwargs
) -> BlockOutput:
service = GmailReadBlock._build_service(credentials, **kwargs)
result = self._remove_label(
service, input_data.message_id, input_data.label_name
)
yield "result", result
def _remove_label(self, service, message_id: str, label_name: str) -> dict:
label_id = self._get_label_id(service, label_name)
if label_id:
service.users().messages().modify(
userId="me", id=message_id, body={"removeLabelIds": [label_id]}
).execute()
return {"status": "Label removed successfully", "label_id": label_id}
else:
return {"status": "Label not found", "label_name": label_name}
def _get_label_id(self, service, label_name: str) -> str | None:
results = service.users().labels().list(userId="me").execute()
labels = results.get("labels", [])
for label in labels:
if label["name"] == label_name:
return label["id"]
return None