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import binascii
import logging
import os
from pathlib import Path
from typing import Any, Dict, Optional
import json
import emails
from emails.template import JinjaTemplate
from fastapi import HTTPException, status
from core.config import settings
from core.db import redis_session_client
from models import User
from cruds import crud_user
from core.db import SessionLocal
def send_email(
email_to: str,
subject_template: str = "",
html_template: str = "",
environment: Dict[str, Any] = {},
) -> None:
assert settings.EMAILS_ENABLED, "no provided configuration for email variables"
message = emails.Message(
subject=JinjaTemplate(subject_template),
html=JinjaTemplate(html_template),
mail_from=(settings.EMAILS_FROM_NAME, settings.EMAILS_FROM_EMAIL),
)
smtp_options = {"host": settings.SMTP_HOST, "port": settings.SMTP_PORT}
if settings.SMTP_TLS:
smtp_options["tls"] = True
if settings.SMTP_USER:
smtp_options["user"] = settings.SMTP_USER
if settings.SMTP_PASSWORD:
smtp_options["password"] = settings.SMTP_PASSWORD
response = message.send(to=email_to, render=environment, smtp=smtp_options)
print(response)
logging.info(f"send email result: {response}")
def send_test_email(email_to: str) -> None:
project_name = settings.PROJECT_NAME
subject = f"{project_name} - Test email"
with open(Path(settings.EMAIL_TEMPLATES_DIR) / "test_email.html") as f:
template_str = f.read()
send_email(
email_to=email_to,
subject_template=subject,
html_template=template_str,
environment={
"project_name": settings.PROJECT_NAME,
"email": email_to,
"frontbase": settings.FRONTEND_URL_BASE,
},
)
async def send_reset_password_email(user: User) -> None:
project_name = settings.PROJECT_NAME
subject = f"{project_name} - Password Recovery"
with open(Path(settings.EMAIL_TEMPLATES_DIR) / "reset-password.html") as f:
template_str = f.read()
server_host = settings.FRONTEND_URL_BASE
reset_token = await generate_password_reset_token(uid=user.id)
link = f"{server_host}/reset?token={reset_token}"
send_email(
email_to=user.email,
subject_template=subject,
html_template=template_str,
environment={
"project_name": settings.PROJECT_NAME,
"username": user.email,
"name": user.full_name,
"email": user.email,
"frontbase": settings.FRONTEND_URL_BASE,
"valid_hours": settings.EMAIL_RESET_TOKEN_EXPIRE_HOURS,
"link": link,
},
)
async def send_verification_email(user: User) -> None:
project_name = settings.PROJECT_NAME
subject = f"{project_name} - Verification Email"
with open(Path(settings.EMAIL_TEMPLATES_DIR) / "verify-account.html") as f:
template_str = f.read()
verification_token = await generate_verify_token(user.id)
server_host = settings.FRONTEND_URL_BASE
link = f"{server_host}/verify?token={verification_token}"
send_email(
email_to=user.email,
subject_template=subject,
html_template=template_str,
environment={
"name": user.full_name,
"link": link,
"frontbase": settings.FRONTEND_URL_BASE,
},
)
async def generate_password_reset_token(uid: str) -> str:
reset_token = binascii.hexlify(os.urandom(20)).decode()
await redis_session_client.client.set(f"pwr_token_{reset_token}", uid)
await redis_session_client.client.expire(
f"pwr_token_{reset_token}",
settings.EMAIL_RESET_TOKEN_EXPIRE_HOURS * 60 * 60 * 1000,
)
return reset_token
async def generate_verify_token(uid: str) -> str:
verify_token = binascii.hexlify(os.urandom(20)).decode()
await redis_session_client.client.set(f"verify_token_{verify_token}", uid)
await redis_session_client.client.expire(
f"verify_token_{verify_token}",
settings.EMAIL_VERIFY_EXPIRE_HOURS * 60 * 60 * 1000,
)
return verify_token
async def verify_password_reset_token(token: str) -> Optional[int]:
uid = await redis_session_client.client.get(f"pwr_token_{token}", encoding="utf-8")
if not uid:
raise HTTPException(
status_code=401, detail="Token has expired!"
) # Invalid token
await redis_session_client.client.expire(f"pwr_token_{token}", timeout=0)
return int(uid)
async def verify_user_verify_token(token: str) -> Optional[int]:
uid = await redis_session_client.client.get(
f"verify_token_{token}", encoding="utf-8"
)
if not uid:
raise HTTPException(
status_code=401, detail="Token has expired!"
) # Invalid token
await redis_session_client.client.expire(f"verify_token_{token}", timeout=0)
return int(uid)
async def expire_web_session(token: str) -> Any:
user_id = await redis_session_client.client.get(token, encoding="utf-8")
active_sessions = await redis_session_client.client.get(
f"user_{user_id}_sessions", encoding="utf-8"
)
if active_sessions:
active_sessions = json.loads(active_sessions)
new_active_sessions = [
item for item in active_sessions["sessions"] if item["token"] != token
]
active_sessions["sessions"] = new_active_sessions
data = {f"user_{user_id}_sessions": json.dumps(active_sessions)}
await redis_session_client.client.mset(data)
return await redis_session_client.client.expire(token, 0)
def get_super_admin() -> User:
return crud_user.get_by_id(db=SessionLocal(), id=1)
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