feat: sua added to group invitations

Issue: #23

src/iam/service.py

@@ -6,11 +6,14 @@ Exports:
 """
 
 from typing import Annotated
+from datetime import datetime, timedelta, timezone
 
 from src.service.models import Service
 from src.database import db_dependency
 from src.schemas import ResourceName
 from src.auth.exceptions import UnauthorizedException
+from src.utils import send_email, generate_jwt
+
 
 from fastapi import Request, Depends
 
@@ -33,3 +36,28 @@ def valid_service_key(db: db_dependency, request: Request, rn: ResourceName) ->
 
 
 service_key_dependency = Annotated[bool, Depends(valid_service_key)]
+
+
+async def send_user_group_invitation(
+	user_email: str, org_name: str, org_id: int, group_id: int, group_name: str
+):
+	expiry_delta = timedelta(hours=24)
+	expiry = datetime.now(timezone.utc) + expiry_delta
+	claims = {
+		"email": user_email,
+		"org_id": org_id,
+		"group_id": group_id,
+		"group_name": group_name,
+		"exp": expiry,
+		"type": "group_invite",
+	}
+
+	token = await generate_jwt(claims)
+	subject = f"You have been invited to join a group of {org_name}"
+	body = f"You have been invited to join {group_name}.\nClick the link to accept.\nfrontend.capture/send/to/endpoint/{token}"
+
+	await send_email(
+		recipient=user_email,
+		subject=subject,
+		body=body,
+	)