76 lines
2.2 KiB
Python
76 lines
2.2 KiB
Python
from typing import Optional
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from django.db import models
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from stator.models import State, StateField, StateGraph, StatorModel
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class FollowStates(StateGraph):
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pending = State(try_interval=30)
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requested = State()
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accepted = State()
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@pending.add_transition(requested)
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async def try_request(instance: "Follow"): # type:ignore
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print("Would have tried to follow on", instance)
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return False
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requested.add_manual_transition(accepted)
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class Follow(StatorModel):
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"""
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When one user (the source) follows other (the target)
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"""
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source = models.ForeignKey(
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"users.Identity",
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on_delete=models.CASCADE,
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related_name="outbound_follows",
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)
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target = models.ForeignKey(
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"users.Identity",
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on_delete=models.CASCADE,
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related_name="inbound_follows",
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)
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uri = models.CharField(blank=True, null=True, max_length=500)
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note = models.TextField(blank=True, null=True)
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state = StateField(FollowStates)
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created = models.DateTimeField(auto_now_add=True)
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updated = models.DateTimeField(auto_now=True)
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class Meta:
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unique_together = [("source", "target")]
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@classmethod
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def maybe_get(cls, source, target) -> Optional["Follow"]:
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"""
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Returns a follow if it exists between source and target
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"""
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try:
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return Follow.objects.get(source=source, target=target)
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except Follow.DoesNotExist:
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return None
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@classmethod
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def create_local(cls, source, target):
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"""
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Creates a Follow from a local Identity to the target
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(which can be local or remote).
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"""
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if not source.local:
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raise ValueError("You cannot initiate follows from a remote Identity")
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try:
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follow = Follow.objects.get(source=source, target=target)
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except Follow.DoesNotExist:
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follow = Follow.objects.create(source=source, target=target, uri="")
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follow.uri = source.actor_uri + f"follow/{follow.pk}/"
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# TODO: Local follow approvals
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if target.local:
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follow.state = FollowStates.accepted
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follow.save()
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return follow
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