dry-refactoring

Resultado esperado:

• I can see the duplication between these functions. Let me apply the DRY workflow:
• Step 1 - Identify: Both functions share the same structure for calculating discounts above a threshold. The only difference is the variable names.
• Step 2 - Abstract: Create a single function that takes the amount and threshold as parameters.
• Step 3 - Replace: Update both call sites to use the new abstraction.
• Step 4 - Verify: Let me help you write tests to confirm the behavior remains identical.

Resultado esperado:

• I can help you eliminate these magic numbers. Here is the approach:
• Step 1 - Identify: The value 0.08 appears in calculate_tax_1, calculate_tax_2, and calculate_total.
• Step 2 - Abstract: Create a constant TAX_RATE = 0.08 in a central location.
• Step 3 - Replace: Replace all occurrences with TAX_RATE.
• Step 4 - Verify: Run tests to confirm tax calculations remain correct.

Resultado esperado:

• I see you have similar validation patterns across services. Let me guide you through DRY refactoring:
• Step 1 - Identify: All three services perform email validation, password validation, and role checks.
• Step 2 - Abstract: Create a validation utility module with reusable functions.
• Step 3 - Replace: Import and use the utility functions in each service.
• Step 4 - Verify: Ensure all validation behavior is preserved and add comprehensive tests.