Restructure Alliance Auth package (#867)

* Refactor allianceauth into its own package

* Add setup

* Add missing default_app_config declarations

* Fix timerboard namespacing

* Remove obsolete future imports

* Remove py2 mock support

* Remove six

* Add experimental 3.7 support and multiple Dj versions

* Remove python_2_unicode_compatible

* Add navhelper as local package

* Update requirements

allianceauth/authentication/signals.py

@@ -0,0 +1,130 @@
+import logging
+
+from .models import CharacterOwnership, UserProfile, get_guest_state, State
+from django.contrib.auth.models import User
+from django.db.models import Q
+from django.db.models.signals import post_save, pre_delete, m2m_changed, pre_save
+from django.dispatch import receiver, Signal
+from esi.models import Token
+from allianceauth.eveonline.managers import EveManager
+
+from allianceauth.eveonline.models import EveCharacter
+
+logger = logging.getLogger(__name__)
+
+
+state_changed = Signal(providing_args=['user', 'state'])
+
+
+def trigger_state_check(state):
+    # evaluate all current members to ensure they still have access
+    for profile in state.userprofile_set.all():
+        profile.assign_state()
+
+    # we may now be available to others with lower states
+    check_states = State.objects.filter(priority__lt=state.priority)
+    for profile in UserProfile.objects.filter(state__in=check_states):
+        if state.available_to_user(profile.user):
+            profile.state = state
+            profile.save(update_fields=['state'])
+            state_changed.send(sender=state.__class__, user=profile.user, state=state)
+
+
+@receiver(m2m_changed, sender=State.member_characters.through)
+def state_member_characters_changed(sender, instance, action, *args, **kwargs):
+    if action.startswith('post_'):
+        trigger_state_check(instance)
+
+
+@receiver(m2m_changed, sender=State.member_corporations.through)
+def state_member_corporations_changed(sender, instance, action, *args, **kwargs):
+    if action.startswith('post_'):
+        trigger_state_check(instance)
+
+
+@receiver(m2m_changed, sender=State.member_alliances.through)
+def state_member_alliances_changed(sender, instance, action, *args, **kwargs):
+    if action.startswith('post_'):
+        trigger_state_check(instance)
+
+
+@receiver(post_save, sender=State)
+def state_saved(sender, instance, *args, **kwargs):
+    trigger_state_check(instance)
+
+
+# Is there a smarter way to intercept pre_save with a diff main_character or state?
+@receiver(post_save, sender=UserProfile)
+def reassess_on_profile_save(sender, instance, created, *args, **kwargs):
+    # catches post_save from profiles to trigger necessary service and state checks
+    if not created:
+        update_fields = kwargs.pop('update_fields', []) or []
+        if 'state' not in update_fields:
+            instance.assign_state()
+
+
+@receiver(post_save, sender=User)
+def create_required_models(sender, instance, created, *args, **kwargs):
+    # ensure all users have a model
+    if created:
+        UserProfile.objects.get_or_create(user=instance)
+
+
+@receiver(post_save, sender=Token)
+def record_character_ownership(sender, instance, created, *args, **kwargs):
+    if created:
+        if instance.user:
+            query = Q(owner_hash=instance.character_owner_hash) & Q(user=instance.user)
+        else:
+            query = Q(owner_hash=instance.character_owner_hash)
+        # purge ownership records if the hash or auth user account has changed
+        CharacterOwnership.objects.filter(character__character_id=instance.character_id).exclude(query).delete()
+        # create character if needed
+        if EveCharacter.objects.filter(character_id=instance.character_id).exists() is False:
+            EveManager.create_character(instance.character_id)
+        char = EveCharacter.objects.get(character_id=instance.character_id)
+        # check if we need to create ownership
+        if instance.user and not CharacterOwnership.objects.filter(character__character_id=instance.character_id).exists():
+            CharacterOwnership.objects.update_or_create(character=char,
+                                                        defaults={'owner_hash': instance.character_owner_hash,
+                                                                  'user': instance.user})
+
+
+@receiver(pre_delete, sender=CharacterOwnership)
+def validate_main_character(sender, instance, *args, **kwargs):
+    if instance.user.profile.main_character == instance.character:
+        # clear main character as user no longer owns them
+        instance.user.profile.main_character = None
+        instance.user.profile.save()
+
+
+@receiver(pre_delete, sender=Token)
+def validate_main_character_token(sender, instance, *args, **kwargs):
+    if UserProfile.objects.filter(main_character__character_id=instance.character_id).exists():
+        profile = UserProfile.objects.get(main_character__character_id=instance.character_id)
+        if not Token.objects.filter(character_id=instance.character_id).filter(user=profile.user).exclude(pk=instance.pk).exists():
+            # clear main character as we can no longer verify ownership
+            profile.main_character = None
+            profile.save()
+
+
+@receiver(pre_save, sender=User)
+def assign_state_on_active_change(sender, instance, *args, **kwargs):
+    # set to guest state if inactive, assign proper state if reactivated
+    if instance.pk:
+        old_instance = User.objects.get(pk=instance.pk)
+        if old_instance.is_active != instance.is_active:
+            if instance.is_active:
+                instance.profile.assign_state()
+            else:
+                instance.profile.state = get_guest_state()
+                instance.profile.save(update_fields=['state'])
+
+
+@receiver(post_save, sender=EveCharacter)
+def check_state_on_character_update(sender, instance, *args, **kwargs):
+    # if this is a main character updating, check that user's state
+    try:
+        instance.userprofile.assign_state()
+    except UserProfile.DoesNotExist:
+        pass