feat: add AirShelf core implementation

core/backend/apps/accounts/models.py

@@ -0,0 +1,59 @@
+import uuid
+
+from django.contrib.auth.models import AbstractUser
+from django.db import models
+
+from apps.common.models import TimeStampedModel
+
+
+class User(AbstractUser):
+    class Status(models.TextChoices):
+        ACTIVE = "active", "Active"
+        DISABLED = "disabled", "Disabled"
+
+    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
+    status = models.CharField(max_length=24, choices=Status.choices, default=Status.ACTIVE)
+    phone = models.CharField(max_length=32, blank=True)
+    avatar_url = models.URLField(blank=True)
+
+    @property
+    def is_disabled(self) -> bool:
+        return self.status == self.Status.DISABLED
+
+
+class Team(TimeStampedModel):
+    class Status(models.TextChoices):
+        ACTIVE = "active", "Active"
+        DISABLED = "disabled", "Disabled"
+
+    name = models.CharField(max_length=128)
+    status = models.CharField(max_length=24, choices=Status.choices, default=Status.ACTIVE)
+    owner = models.ForeignKey(User, on_delete=models.PROTECT, related_name="owned_teams")
+
+    def __str__(self) -> str:
+        return self.name
+
+
+class TeamMember(TimeStampedModel):
+    class Role(models.TextChoices):
+        OWNER = "owner", "Owner"
+        ADMIN = "admin", "Admin"
+        MEMBER = "member", "Member"
+        VIEWER = "viewer", "Viewer"
+
+    class Status(models.TextChoices):
+        ACTIVE = "active", "Active"
+        INVITED = "invited", "Invited"
+        DISABLED = "disabled", "Disabled"
+
+    team = models.ForeignKey(Team, on_delete=models.CASCADE, related_name="members")
+    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name="team_memberships")
+    role = models.CharField(max_length=24, choices=Role.choices, default=Role.MEMBER)
+    status = models.CharField(max_length=24, choices=Status.choices, default=Status.ACTIVE)
+    monthly_credit_limit = models.DecimalField(max_digits=12, decimal_places=2, default=0)
+
+    class Meta:
+        unique_together = [("team", "user")]
+
+    def __str__(self) -> str:
+        return f"{self.team} / {self.user} / {self.role}"