redux/actions /course.js

import { server } from '../store'; // Importing server endpoint for API requests
import axios from 'axios'; // Importing axios for making HTTP requests

// Action to get all courses with optional filtering by category and keyword
export const getAllCourses =
  (category = '', keyword = '') =>
  async dispatch => {
    try {
      dispatch({ type: 'allCoursesRequest' }); // Dispatching request action

      // Fetching courses from the server with optional query parameters
      const { data } = await axios.get(
        `${server}/courses?keyword=${keyword}&category=${category}`
      );

      // Dispatching success action with the retrieved courses
      dispatch({ type: 'allCoursesSuccess', payload: data.courses });
    } catch (error) {
      // Dispatching failure action with the error message
      dispatch({
        type: 'allCoursesFail',
        payload: error.response.data.message,
      });
    }
  };

// Action to get lectures for a specific course by ID
export const getCourseLectures = id => async dispatch => {
  try {
    dispatch({ type: 'getCourseRequest' }); // Dispatching request action

    // Fetching course lectures from the server using the course ID
    const { data } = await axios.get(`${server}/course/${id}`, {
      withCredentials: true, // Include credentials for CORS requests
    });

    // Dispatching success action with the retrieved lectures
    dispatch({ type: 'getCourseSuccess', payload: data.lectures });
  } catch (error) {
    // Dispatching failure action with the error message
    dispatch({
      type: 'getCourseFail',
      payload: error.response.data.message,
    });
  }
};