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authentik/passbook/flows/models.py

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"""Flow models"""
from enum import Enum
from typing import Tuple
from django.db import models
from django.utils.translation import gettext_lazy as _
from passbook.core.models import Factor
from passbook.lib.models import UUIDModel
from passbook.policies.models import PolicyBindingModel
class FlowDesignation(Enum):
"""Designation of what a Flow should be used for. At a later point, this
should be replaced by a database entry."""
AUTHENTICATION = "authentication"
ENROLLMENT = "enrollment"
RECOVERY = "recovery"
@staticmethod
def as_choices() -> Tuple[Tuple[str, str]]:
"""Generate choices of actions used for database"""
return tuple(
(x, y.value) for x, y in getattr(FlowDesignation, "__members__").items()
)
class Flow(PolicyBindingModel, UUIDModel):
"""Flow describes how a series of Factors should be executed to authenticate/enroll/recover
a user. Additionally, policies can be applied, to specify which users
have access to this flow."""
name = models.TextField()
slug = models.SlugField(unique=True)
designation = models.CharField(max_length=100, choices=FlowDesignation.as_choices())
factors = models.ManyToManyField(Factor, through="FlowFactorBinding")
pbm = models.OneToOneField(
PolicyBindingModel, parent_link=True, on_delete=models.CASCADE, related_name="+"
)
def __str__(self) -> str:
return f"Flow {self.name} ({self.slug})"
class Meta:
verbose_name = _("Flow")
verbose_name_plural = _("Flows")
class FlowFactorBinding(PolicyBindingModel, UUIDModel):
"""Relationship between Flow and Factor. Order is required and unique for
each flow-factor Binding. Additionally, policies can be specified, which determine if
this Binding applies to the current user"""
flow = models.ForeignKey("Flow", on_delete=models.CASCADE)
factor = models.ForeignKey(Factor, on_delete=models.CASCADE)
re_evaluate_policies = models.BooleanField(
default=False,
help_text=_(
"When this option is enabled, the planner will re-evaluate policies bound to this."
),
)
order = models.IntegerField()
def __str__(self) -> str:
return f"Flow Factor Binding #{self.order} {self.flow} -> {self.factor}"
class Meta:
ordering = ["order", "flow"]
verbose_name = _("Flow Factor Binding")
verbose_name_plural = _("Flow Factor Bindings")
unique_together = (("flow", "factor", "order"),)