first commit

backend/app/models/case.py

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+import uuid
+from datetime import datetime
+
+from sqlalchemy import String, Numeric, Integer, DateTime, Enum as SAEnum, func
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.core.database import Base
+
+import enum
+
+
+class CaseStatus(str, enum.Enum):
+    pending = "pending"
+    uploading = "uploading"
+    analyzing = "analyzing"
+    reviewing = "reviewing"
+    completed = "completed"
+
+
+class Case(Base):
+    __tablename__ = "cases"
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    case_no: Mapped[str] = mapped_column(String(64), unique=True, index=True)
+    title: Mapped[str] = mapped_column(String(256))
+    victim_name: Mapped[str] = mapped_column(String(128))
+    handler: Mapped[str] = mapped_column(String(128), default="")
+    status: Mapped[CaseStatus] = mapped_column(SAEnum(CaseStatus), default=CaseStatus.pending)
+    image_count: Mapped[int] = mapped_column(Integer, default=0)
+    total_amount: Mapped[float] = mapped_column(Numeric(14, 2), default=0)
+    created_by: Mapped[str] = mapped_column(String(128), default="")
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
+    deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
+
+    images = relationship("EvidenceImage", back_populates="case", lazy="selectin")
+    transactions = relationship("TransactionRecord", back_populates="case", lazy="selectin")
+    assessments = relationship("FraudAssessment", back_populates="case", lazy="selectin")
+    reports = relationship("ExportReport", back_populates="case", lazy="selectin")