adision de bases para trabajo completo de back-v1.0.0

app/modules/credits/service.py

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+from sqlalchemy.orm import Session
+from datetime import datetime
+from typing import Optional
+from fastapi import HTTPException
+from app.modules.credits.models import Credits
+from app.modules.credits.schema import CreditsCreate, CreditsUpdate, CerditsResponse, MessageResponse
+
+
+class CreditsService:
+    @staticmethod
+    def create_credits(db: Session, data:CreditsCreate ):
+        new_credits = Credits(**data.dict())
+        db.add(new_credits)
+        db.commit()
+        db.refresh(new_credits)
+        return new_credits
+
+    @staticmethod
+    def get_credits(db: Session, credits_id: int, current_user):
+        credits = db.query(Credits).filter(Credits.id == credits_id).first()
+        if not credits:
+            raise ValueError("credits no encontrado")
+        return credits
+
+    @staticmethod
+    def update_credits(db: Session, credits_id: int, data:CreditsUpdate , current_user):
+        credits = db.query(Credits).filter(Credits.id == credits_id).first()
+        if not credits:
+            raise ValueError("credits no encontrado")
+        
+        if current_user.role not in ["ROOT", "ADMIN"]:
+            raise ValueError("No tienes permisos para actualizar este credits")
+        
+        update_data = data.dict(exclude_unset=True)
+        for key, value in update_data.items():
+            setattr(credits, key, value)
+        
+        db.commit()
+        db.refresh(credits)
+        return credits
+
+    @staticmethod
+    def delete_credits(db: Session, credits_id: int, current_user):
+        credits = db.query(Credits).filter(Credits.id == credits_id).first()
+        if not credits:
+            raise ValueError("credits no encontrado")
+        
+        if current_user.role not in ["ROOT", "ADMIN"]:
+            raise ValueError("No tienes permisos para eliminar este credits")
+        
+        try:
+            credits.is_active = False
+            credits.deleted_at = datetime.utcnow()
+            credits.deleted_by = current_user.id
+            db.commit()
+            db.refresh(credits)
+        except Exception as e:
+            db.rollback()
+            raise ValueError(f"Error al eliminar el credits: {e}")
+        
+        return {"message": "credits eliminado correctamente"}
+
+