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"""
Submit a form.
"""
import binascii
import datetime
import hashlib
import uuid
from typing import Any, Optional
import httpx
from pydantic import ValidationError
from pydantic.main import BaseModel
from spectree import Response
from starlette.background import BackgroundTasks
from starlette.requests import Request
from starlette.responses import JSONResponse
from backend import constants, discord
from backend.authentication.user import User
from backend.models import Form, FormResponse
from backend.route import Route
from backend.routes.auth.authorize import set_response_token
from backend.routes.forms.unittesting import execute_unittest
from backend.validation import ErrorMessage, api
HCAPTCHA_VERIFY_URL = "https://hcaptcha.com/siteverify"
HCAPTCHA_HEADERS = {
"Content-Type": "application/x-www-form-urlencoded"
}
class SubmissionResponse(BaseModel):
form: Form
response: FormResponse
class PartialSubmission(BaseModel):
response: dict[str, Any]
captcha: Optional[str]
class SubmitForm(Route):
"""
Submit a form with the provided form ID.
"""
name = "submit_form"
path = "/submit/{form_id:str}"
@api.validate(
json=PartialSubmission,
resp=Response(
HTTP_200=SubmissionResponse,
HTTP_404=ErrorMessage,
HTTP_400=ErrorMessage
),
tags=["forms", "responses"]
)
async def post(self, request: Request) -> JSONResponse:
"""Submit a response to the form."""
response = await self.submit(request)
# Silently try to update user data
try:
if hasattr(request.user, User.refresh_data.__name__):
old = request.user.token
await request.user.refresh_data()
if old != request.user.token:
try:
expiry = datetime.datetime.fromisoformat(
request.user.decoded_token.get("expiry")
)
except ValueError:
expiry = None
expiry_seconds = (expiry - datetime.datetime.now()).seconds
await set_response_token(response, request, request.user.token, expiry_seconds)
except httpx.HTTPStatusError:
pass
return response
@staticmethod
async def submit(request: Request) -> JSONResponse:
"""Helper method for handling submission logic."""
data = await request.json()
data["timestamp"] = None
if form := await request.state.db.forms.find_one(
{"_id": request.path_params["form_id"], "features": "OPEN"}
):
form = Form(**form)
response = data.copy()
response["id"] = str(uuid.uuid4())
response["form_id"] = form.id
if constants.FormFeatures.DISABLE_ANTISPAM.value not in form.features:
ip_hash_ctx = hashlib.md5()
ip_hash_ctx.update(request.client.host.encode())
ip_hash = binascii.hexlify(ip_hash_ctx.digest())
user_agent_hash_ctx = hashlib.md5()
user_agent_hash_ctx.update(request.headers["User-Agent"].encode())
user_agent_hash = binascii.hexlify(user_agent_hash_ctx.digest())
async with httpx.AsyncClient() as client:
query_params = {
"secret": constants.HCAPTCHA_API_SECRET,
"response": data.get("captcha")
}
r = await client.post(
HCAPTCHA_VERIFY_URL,
params=query_params,
headers=HCAPTCHA_HEADERS
)
r.raise_for_status()
captcha_data = r.json()
response["antispam"] = {
"ip_hash": ip_hash.decode(),
"user_agent_hash": user_agent_hash.decode(),
"captcha_pass": captcha_data["success"]
}
if constants.FormFeatures.REQUIRES_LOGIN.value in form.features:
if request.user.is_authenticated:
response["user"] = request.user.payload
response["user"]["admin"] = request.user.admin
if (
constants.FormFeatures.COLLECT_EMAIL.value in form.features
and "email" not in response["user"]
):
return JSONResponse({
"error": "email_required"
}, status_code=400)
else:
return JSONResponse({
"error": "missing_discord_data"
}, status_code=400)
missing_fields = []
for question in form.questions:
if question.id not in response["response"]:
if not question.required:
response["response"][question.id] = None
else:
missing_fields.append(question.id)
if missing_fields:
return JSONResponse({
"error": "missing_fields",
"fields": missing_fields
}, status_code=400)
try:
response_obj = FormResponse(**response)
except ValidationError as e:
return JSONResponse(e.errors(), status_code=422)
# Run unittests if needed
if any("unittests" in question.data for question in form.questions):
unittest_results = await execute_unittest(response_obj, form)
if not all(test.passed for test in unittest_results):
# Return 500 if we encountered an internal error (code 99).
status_code = 500 if any(
test.return_code == 99 for test in unittest_results
) else 403
return JSONResponse({
"error": "failed_tests",
"test_results": [
test._asdict() for test in unittest_results if not test.passed
]
}, status_code=status_code)
await request.state.db.responses.insert_one(
response_obj.dict(by_alias=True)
)
tasks = BackgroundTasks()
if constants.FormFeatures.WEBHOOK_ENABLED.value in form.features:
tasks.add_task(
discord.send_submission_webhook,
form=form,
response=response_obj,
request_user=request.user
)
if constants.FormFeatures.ASSIGN_ROLE.value in form.features:
tasks.add_task(
discord.assign_role,
form=form,
request_user=request.user
)
return JSONResponse({
"form": form.dict(admin=False),
"response": response_obj.dict()
}, background=tasks)
else:
return JSONResponse({
"error": "Open form not found"
}, status_code=404)
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