feat(conflicts): added conflicts business and presentation logic

src/backend/apps/experiments/models.py

@@ -67,11 +67,6 @@ EDITABLE_IN_DRAFT: tuple[str, ...] = (
 )
 
 
-class ConflictPolicy(models.TextChoices):
-    MUTUAL_EXCLUSION = "mutual_exclusion", _("Mutual exclusion")
-    PRIORITY = "priority", _("Priority tiers")
-
-
 class OutcomeType(models.TextChoices):
     ROLLOUT = "rollout", _("Rollout winner")
     ROLLBACK = "rollback", _("Rollback")
@@ -431,87 +426,6 @@ class Approval(BaseModel):
         return f"Approval by {self.approver} for {self.experiment}"
 
 
-class ConflictDomain(BaseModel):
-    name = models.CharField(
-        max_length=200,
-        unique=True,
-        verbose_name=_("name"),
-    )
-    description = models.TextField(
-        blank=True,
-        verbose_name=_("description"),
-    )
-    policy = models.CharField(
-        max_length=30,
-        choices=ConflictPolicy.choices,
-        default=ConflictPolicy.MUTUAL_EXCLUSION,
-        verbose_name=_("conflict policy"),
-    )
-    max_concurrent = models.PositiveIntegerField(
-        default=1,
-        verbose_name=_("max concurrent experiments"),
-    )
-    created_at = models.DateTimeField(
-        auto_now_add=True,
-        verbose_name=_("created at"),
-    )
-    updated_at = models.DateTimeField(
-        auto_now=True,
-        verbose_name=_("updated at"),
-    )
-
-    class Meta:
-        verbose_name = _("conflict domain")
-        verbose_name_plural = _("conflict domains")
-        ordering = ["name"]
-
-    @override
-    def __str__(self) -> str:
-        return f"{self.name} ({self.policy})"
-
-
-class ExperimentConflictDomain(BaseModel):
-    experiment = models.ForeignKey(
-        Experiment,
-        on_delete=models.CASCADE,
-        related_name="conflict_memberships",
-        verbose_name=_("experiment"),
-    )
-    conflict_domain = models.ForeignKey(
-        ConflictDomain,
-        on_delete=models.CASCADE,
-        related_name="experiment_memberships",
-        verbose_name=_("conflict domain"),
-    )
-    priority = models.IntegerField(
-        default=0,
-        verbose_name=_("priority"),
-        help_text=_("Higher value wins in priority-based resolution"),
-    )
-    created_at = models.DateTimeField(
-        auto_now_add=True,
-        verbose_name=_("created at"),
-    )
-
-    class Meta:
-        verbose_name = _("experiment conflict domain")
-        verbose_name_plural = _("experiment conflict domains")
-        ordering = ["-priority"]
-        constraints = [
-            models.UniqueConstraint(
-                fields=["experiment", "conflict_domain"],
-                name="unique_experiment_conflict_domain",
-            ),
-        ]
-
-    @override
-    def __str__(self) -> str:
-        return (
-            f"{self.experiment.name} in {self.conflict_domain.name} "
-            f"(priority={self.priority})"
-        )
-
-
 class ExperimentOutcome(BaseModel):
     experiment = models.OneToOneField(
         Experiment,

src/backend/apps/experiments/services.py

@@ -16,6 +16,7 @@ from apps.experiments.models import (
     OutcomeType,
     Variant,
 )
+from apps.conflicts.services import validate_domain_conflicts
 from apps.flags.models import FeatureFlag, validate_value_for_type
 from apps.notifications.services import (
     NotificationPayload,
@@ -373,6 +374,7 @@ def experiment_request_changes(
 def experiment_start(*, experiment: Experiment, user: User) -> Experiment:
     ensure_owner_or_admin(experiment, user)
     _validate_no_active_flag_conflict(experiment)
+    validate_domain_conflicts(experiment)
     experiment = _transition(
         experiment,
         ExperimentStatus.RUNNING,
@@ -401,6 +403,7 @@ def experiment_pause(
 def experiment_resume(*, experiment: Experiment, user: User) -> Experiment:
     ensure_owner_or_admin(experiment, user)
     _validate_no_active_flag_conflict(experiment)
+    validate_domain_conflicts(experiment)
     return _transition(
         experiment,
         ExperimentStatus.RUNNING,