Issue: Optimize Newsletter Controller for Clarity and Maintainability

[akofficial10]

📋 Description

The newsletterController.js file currently handles subscription, unsubscription, and newsletter sending effectively. However, the code can be optimized to enhance clarity, maintainability, and consistency without changing its core logic.

✅ Expected Improvements

• Improve input validation for subject and content fields.
• Add consistent and clear response messages.
• Use early return patterns for cleaner flow.
• Reduce redundant queries and streamline object creation.
• Ensure every route has unified error handling.

💡 Proposed Solution

• Refactor function structures with clear separation of responsibilities.
• Add missing input checks for newsletter sending.
• Keep all existing behavior and endpoints intact.
• Maintain consistent and descriptive variable names.

🔍 Affected File

controllers/newsletterController.js

Requested Tags

• GSSoC25, LEVEL 3
• Thank you

[github-actions]

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Meanwhile make sure you've visited the README.md, CONTRIBUTING.md, and CODE_OF_CONDUCT.md before creating a PR for this. Also, please do NOT create a PR until this issue has been assigned to you. 😊