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backend/app/schemas/arrival.py

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+from pydantic import BaseModel, validator
+from datetime import datetime
+from typing import Optional
+from enum import Enum
+
+
+class ArrivalStatus(str, Enum):
+    BOOKED_IN = "BOOKED_IN"
+    LANDED = "LANDED"
+    CANCELLED = "CANCELLED"
+
+
+class ArrivalBase(BaseModel):
+    registration: str
+    type: Optional[str] = None
+    callsign: Optional[str] = None
+    pob: int
+    in_from: str
+    notes: Optional[str] = None
+
+    @validator('registration')
+    def validate_registration(cls, v):
+        if not v or len(v.strip()) == 0:
+            raise ValueError('Aircraft registration is required')
+        return v.strip().upper()
+
+    @validator('in_from')
+    def validate_in_from(cls, v):
+        if not v or len(v.strip()) == 0:
+            raise ValueError('Origin airport is required')
+        return v.strip()
+
+    @validator('pob')
+    def validate_pob(cls, v):
+        if v is not None and v < 1:
+            raise ValueError('Persons on board must be at least 1')
+        return v
+
+
+class ArrivalCreate(ArrivalBase):
+    pass
+
+
+class ArrivalUpdate(BaseModel):
+    type: Optional[str] = None
+    callsign: Optional[str] = None
+    pob: Optional[int] = None
+    in_from: Optional[str] = None
+    notes: Optional[str] = None
+
+
+class ArrivalStatusUpdate(BaseModel):
+    status: ArrivalStatus
+    timestamp: Optional[datetime] = None
+
+
+class Arrival(ArrivalBase):
+    id: int
+    status: ArrivalStatus
+    booked_in_dt: datetime
+    landed_dt: Optional[datetime] = None
+    created_by: Optional[str] = None
+    updated_at: datetime
+
+    class Config:
+        from_attributes = True