@selfcommunity/react-core/lib/esm/hooks/useSCFetchCourses.js

React Core Components useful for integrating UI Community components (react-ui).

import { __awaiter } from "tslib";
import { useEffect, useState } from 'react';
import { SCOPE_SC_CORE } from '../constants/Errors';
import { Endpoints, http } from '@selfcommunity/api-services';
import { CacheStrategies, Logger, LRUCache } from '@selfcommunity/utils';
import { getCourseObjectCacheKey, getCoursesObjectCacheKey } from '../constants/Cache';
const init = { courses: [], isLoading: true };
// HYDRATE the cache
const hydrate = (ids) => {
    if (!ids) {
        return null;
    }
    const courses = ids.map((id) => {
        const __courseCacheKey = getCourseObjectCacheKey(id);
        return LRUCache.get(__courseCacheKey);
    });
    if (courses.filter((c) => !c).length > 0) {
        // REVALIDATE CACHE
        return null;
    }
    return courses;
};
/**
 :::info
 This custom hook is used to fetch courses.
 @param object.cacheStrategy

 :::tip Context can be consumed in this way:

 ```jsx
 const {courses, isLoading} = useSCFetchCourses();
 ```
 :::
 * @param props
 */
const useSCFetchCourses = (props) => {
    // PROPS
    const { cacheStrategy = CacheStrategies.CACHE_FIRST } = props || {};
    // CACHE
    const __coursesCacheKey = getCoursesObjectCacheKey();
    // STATE
    const courses = cacheStrategy !== CacheStrategies.NETWORK_ONLY ? hydrate(LRUCache.get(__coursesCacheKey, null)) : null;
    const [data, setData] = useState(courses !== null ? { courses, isLoading: false } : init);
    /**
     * Fetch courses
     */
    const fetchCourses = (next = Endpoints.GetJoinedCourses.url()) => __awaiter(void 0, void 0, void 0, function* () {
        const response = yield http.request({
            url: next,
            method: Endpoints.GetJoinedCourses.method,
        });
        const data = response.data;
        if (data.next) {
            return data.results.concat(yield fetchCourses(data.next));
        }
        return data.results;
    });
    /**
     * Get courses
     */
    useEffect(() => {
        if (cacheStrategy === CacheStrategies.CACHE_FIRST && courses) {
            return;
        }
        fetchCourses()
            .then((data) => {
            setData({ courses: data, isLoading: false });
            LRUCache.set(__coursesCacheKey, data.map((course) => {
                const __courseCacheKey = getCourseObjectCacheKey(course.id);
                LRUCache.set(__courseCacheKey, course);
                return course.id;
            }));
        })
            .catch((error) => {
            console.log(error);
            Logger.error(SCOPE_SC_CORE, 'Unable to retrieve courses');
        });
    }, []);
    return data;
};
export default useSCFetchCourses;