📘 API Endpoints (v1)

🔍 GET /api/v1/chapters

Description: Fetch all chapters.
Query Filters:

• class: Filter by class (e.g., Class 11)
• unit: Filter by unit name
• status: Filter by status (e.g., Completed, Not Started)
• subject: Filter by subject (e.g., Physics)
• weakChapters: true or false
• page: For pagination (default = 1)
• limit: Number of results per page (default = 10)

Returns: Filtered and paginated list of chapters + total count
Caching: Cached via Redis for 1 hour

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🔎 GET /api/v1/chapters/:id

Description: Fetch a single chapter by its MongoDB _id
Returns: Chapter details or 404 if not found

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⬆️ POST /api/v1/chapters

Description: Upload chapters via JSON file (admin-only)
Authorization: Requires Authorization: Bearer admin-secret-token header
Body: Upload .json file using form-data with field name file

Behavior:

• Parses and validates uploaded chapters
• Inserts valid chapters into the database
• Skips invalid ones and returns them in a failed array

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🧱 Middleware Features

• Redis Caching: For GET /chapters with 1-hour TTL
• Rate Limiting: 30 requests per minute per IP (Redis-backed)
• Error Handling: Proper HTTP status codes and JSON error messages

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