Subscription API Services Module

Overview

This module provides a collection of API service functions for managing student meal plan subscription requests. It handles the creation of new subscription requests, processing existing requests, and retrieving a list of all subscription requests. The module implements error handling and uses axios for HTTP requests.

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Dependencies

• axios: Library for making HTTP requests

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Module Structure

Configuration

• API_URL: Base URL for all API endpoints
• axios.defaults: Global axios configuration settings

Exported Functions

• createSubscriptionRequest: Creates a new meal plan subscription request
• processSubscriptionRequest: Updates the status of an existing request
• getSubscriptionRequests: Retrieves all subscription requests

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Functionality

Request Creation

• Endpoint: POST /api/subscription-request
• Parameters: studentId, newPlan
• Returns: Response data from the server
• Error Handling: Throws server response data or generic error message

Request Processing

• Endpoint: PUT /api/process-request
• Parameters: requestId, status, rejectionReason (optional)
• Returns: Response data from the server
• Error Handling: Throws server response data or generic error message

Request Retrieval

• Endpoint: GET /api/subscription-requests
• Parameters: None
• Returns: Array of subscription request objects
• Error Handling: Throws server response data or generic error message

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API Endpoints

POST /api/subscription-request

Creates a new meal plan subscription request.

Request Body:

{
  "studentId": "12345678",
  "newPlan": "Premium (19 meals/week)"
}

Success Response: Returns data from server response

Error Response: Returns error from server or generic error message

PUT /api/process-request

Updates the status of an existing subscription request.

Request Body:

{
  "requestId": "request123",
  "status": "approved", // or "rejected"
  "rejectionReason": "Optional reason for rejection"
}

Success Response: Returns data from server response

Error Response: Returns error from server or generic error message

GET /api/subscription-requests

Retrieves all subscription requests.

Request Parameters: None

Success Response: Returns array of subscription request objects

Error Response: Returns error from server or generic error message

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Global Configuration

axios.defaults.baseURL = process.env.REACT_APP_API_URL || '/api';
axios.defaults.headers.common['Content-Type'] = 'application/json';

• Sets the base URL from environment variable or fallback
• Sets default content type header for all requests

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Implementation Details

• Promise-based: All functions return promises for async/await compatibility
• Error Extraction: Attempts to extract response data from errors before falling back to generic messages
• Optional Parameters: Support for optional parameters like rejectionReason
• Environment Variable: Uses environment variable for API URL with fallback

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Best Practices Demonstrated

• Separation of Concerns: API logic separated from UI components
• Error Handling: Consistent error handling pattern across functions
• Promise Architecture: Clean async/await compatible functions
• Environment Configuration: Flexible configuration through environment variables
• Content Type Standardization: Consistent headers for API requests

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Usage

import { 
  createSubscriptionRequest, 
  processSubscriptionRequest, 
  getSubscriptionRequests 
} from './path/to/api-services';

// Create a new subscription request
try {
  const result = await createSubscriptionRequest('12345678', 'Premium (19 meals/week)');
  console.log('Request created:', result);
} catch (error) {
  console.error('Error creating request:', error);
}

// Process a subscription request
try {
  const result = await processSubscriptionRequest('request123', 'approved');
  console.log('Request processed:', result);
} catch (error) {
  console.error('Error processing request:', error);
}

// Get all subscription requests
try {
  const requests = await getSubscriptionRequests();
  console.log('All requests:', requests);
} catch (error) {
  console.error('Error fetching requests:', error);
}

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Enhancement Possibilities

• Add request cancellation support using axios cancel tokens
• Implement request caching for frequently accessed data
• Add pagination support for large request lists
• Include request filtering and sorting functionality
• Add authentication token handling
• Implement request throttling or rate limiting
• Add request timeouts and retry logic
• Include detailed request logging for debugging