feat: initial commit

backend/app/schemas.py

@@ -0,0 +1,58 @@
+from datetime import datetime
+from typing import Optional
+from pydantic import BaseModel, Field
+
+
+# --- Category ---
+class CategoryBase(BaseModel):
+    name: str
+
+class CategoryCreate(CategoryBase):
+    pass
+
+class CategoryResponse(CategoryBase):
+    id: int
+    created_at: datetime
+
+    model_config = {"from_attributes": True}
+
+
+# --- PiggyBank ---
+class PiggyBankBase(BaseModel):
+    name: str
+    target_amount: float = Field(gt=0)
+    currency: str = "USD"
+    category_id: Optional[int] = None
+
+class PiggyBankCreate(PiggyBankBase):
+    pass
+
+class PiggyBankUpdate(BaseModel):
+    name: Optional[str] = None
+    target_amount: Optional[float] = Field(default=None, gt=0)
+    currency: Optional[str] = None
+    category_id: Optional[int] = None
+
+class PiggyBankResponse(PiggyBankBase):
+    id: int
+    current_amount: float
+    progress_percent: float
+    created_at: datetime
+    updated_at: datetime
+
+    model_config = {"from_attributes": True}
+
+
+# --- Transaction ---
+class TransactionCreate(BaseModel):
+    amount: float = Field(ne=0)
+    description: Optional[str] = None
+
+class TransactionResponse(BaseModel):
+    id: int
+    piggy_bank_id: int
+    amount: float
+    description: Optional[str]
+    created_at: datetime
+
+    model_config = {"from_attributes": True}