98 lines
3.5 KiB
Python
98 lines
3.5 KiB
Python
"""Submit form view (plan.md §7.4 + §7).
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The view persists a `Submission` and, depending on whether the request is
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authenticated, sets the initial state machine state per plan.md §7.3:
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OAuth user -> processing (email already verified)
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guest with email -> identifying (waiting for confirmation link click)
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Slug generation, email sending, and validation cron are out of scope here and
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deferred to plan.md §7.5 (`processor` sidecar) and §7.5 confirmation flow.
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"""
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from __future__ import annotations
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import secrets
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import namesgenerator
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from django.contrib import messages
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from django.db import IntegrityError, transaction
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from django.urls import reverse_lazy
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from django.utils import timezone
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from django.views.generic import CreateView
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from .forms import SubmissionForm
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from .models import Submission
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def _generate_unique_slug(max_attempts: int = 16) -> str:
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"""`namesgenerator.get_random_name` with collision retries.
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The slug column is `unique=True`; we retry instead of looping in SQL so
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the rare collision path stays observable.
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"""
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for _ in range(max_attempts):
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candidate = namesgenerator.get_random_name()
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if not Submission.objects.filter(slug=candidate).exists():
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return candidate
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# Fall through: extremely unlikely, but caller will see IntegrityError
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# if the next save() still collides.
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return namesgenerator.get_random_name()
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class SubmitView(CreateView):
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"""Public submit form. GET renders, POST creates a Submission."""
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form_class = SubmissionForm
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template_name = "submissions/submit.html"
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success_url = reverse_lazy("dashboard:index")
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def get_form_kwargs(self):
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kwargs = super().get_form_kwargs()
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kwargs["user"] = self.request.user
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return kwargs
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@transaction.atomic
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def form_valid(self, form):
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submission: Submission = form.save(commit=False)
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submission.slug = _generate_unique_slug()
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if self.request.user.is_authenticated:
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submission.submitted_by = self.request.user
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submission.guest_email = None
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submission.email_confirmed = True
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submission.status = Submission.Status.PROCESSING
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else:
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submission.submitted_by = None
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# guest_email is already on the form's cleaned_data, ModelForm
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# populated it onto the instance.
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submission.email_confirmed = False
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submission.status = Submission.Status.IDENTIFYING
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submission.confirmation_token = secrets.token_urlsafe(32)
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submission.confirmation_sent_at = timezone.now()
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# TODO(plan.md §7.4 step 6): send the confirmation email here.
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try:
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submission.save()
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except IntegrityError:
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# Extremely rare slug collision on the unique index; one more try.
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submission.slug = _generate_unique_slug()
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submission.save()
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if submission.status == Submission.Status.IDENTIFYING:
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messages.info(
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self.request,
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f"Submission {submission.slug} created. Check your email "
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f"({submission.guest_email}) for a confirmation link -- you "
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f"have 24 hours.",
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)
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else:
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messages.success(
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self.request,
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f"Submission {submission.slug} accepted. We'll start "
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f"validating it shortly.",
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)
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self.object = submission
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return super().form_valid(form)
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