need help explaining each and every line of the code functionality ========================================================== import React, { useEffect, useContext, useState } from "react"; import { AppContext } from "../../context/applicationContext"; import LoadingIndicator from "../../components/LoadingIndicator"; // import the API from apiUtil.js import { getOthersFeedsApi } from "../../util/ApiUtil"; import MyProfile from "../../components/MyProfile"; import AddFeed from "../../components/AddFeed"; import InfiniteScroll from "react-infinite-scroll-component"; import FeedCard from "../../components/FeedCard"; const Dashboard = () => { // name spacing for the child component using UseContext hook const appContext = useContext(AppContext); // access the token which is present inside our cookies const token = appContext.getSession(); // access the user data by calling getUserData() function from AppCon
need help explaining each and every line of the code functionality ========================================================== import React, { useEffect, useContext, useState } from "react"; import { AppContext } from "../../context/applicationContext"; import LoadingIndicator from "../../components/LoadingIndicator"; // import the API from apiUtil.js import { getOthersFeedsApi } from "../../util/ApiUtil"; import MyProfile from "../../components/MyProfile"; import AddFeed from "../../components/AddFeed"; import InfiniteScroll from "react-infinite-scroll-component"; import FeedCard from "../../components/FeedCard"; const Dashboard = () => { // name spacing for the child component using UseContext hook const appContext = useContext(AppContext); // access the token which is present inside our cookies const token = appContext.getSession(); // access the user data by calling getUserData() function from AppCon
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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need help explaining each and every line of the code functionality
==========================================================
import React, { useEffect, useContext, useState } from "react";
import { AppContext } from "../../context/applicationContext";
import LoadingIndicator from "../../components/LoadingIndicator";
// import the API from apiUtil.js
import { getOthersFeedsApi } from "../../util/ApiUtil";
import MyProfile from "../../components/MyProfile";
import AddFeed from "../../components/AddFeed";
import InfiniteScroll from "react-infinite-scroll-component";
import FeedCard from "../../components/FeedCard";
const Dashboard = () => {
// name spacing for the child component using UseContext hook
const appContext = useContext(AppContext);
// access the token which is present inside our cookies
const token = appContext.getSession();
// access the user data by calling getUserData() function from AppContext
const userData = appContext.getUserData();
// all the other user's feed are captured and stored inside an Array
const [feedsData, setFeedsData] = useState([]);
const [pageNumber, setPageNumber] = useState(0);
//State variable that holds a boolean indicating whether thee are more feeds to be displayed
const [hasMore, setHasMore] = useState(true);
// Function is going to load the feeds of other user's
const getOthersFeeds = async (loadPageNumber) => {
if (loadPageNumber === 0) {
setFeedsData([]);
}
const apiResponse = await getOthersFeedsApi(token, loadPageNumber);
console.log(apiResponse);
if (apiResponse.status === 1) {
let feedsDataNew = [];
if (loadPageNumber !== 0) {
feedsDataNew = feedsData;
}
feedsDataNew.push(...apiResponse.payLoad.content);
setFeedsData(feedsDataNew);
setPageNumber(loadPageNumber + 1);
if (loadPageNumber + 1 === apiResponse.payLoad.totalPages) {
setHasMore(false);
} else {
setHasMore(true);
}
}
};
//set the page title and fetch the feeds for the Dashboard
useEffect(() => {
document.title = "Home | Feed App";
getOthersFeeds(0);
}, []);
// if the data is being fetched from the backend, it displays loading indicator
if (!userData) {
return <LoadingIndicator />;
}
return (
<main className="grid grid-cols-1 lg:grid-cols-2 gap-6 my-12 mx-0 md:mx-12 w-2xl container px-2 mx-auto">
{/* {#MyProfile Component} */}
<MyProfile />
<article>
{/* {#AddFeed Component} */}
<AddFeed />
{/* {#FeedCard Component} */}
<InfiniteScroll
dataLength={feedsData.length}
next={() => getOthersFeeds(pageNumber)}
hasMore={hasMore}
endMessage={
<p className="text-center">
<b>Yay! You have seen it all.</b>
</p>
}
refreshFunction={() => getOthersFeeds(0)}
pullDownToRefresh
pullDownToRefreshThreshold={50}
pullDownToRefreshContent={
<h3 className="text-center">↓ Pull down to refresh</h3>
}
releaseToRefreshContent={
<h3 className="text-center">↑ Release to refresh</h3>
}
>
<div className="mt-3">
{feedsData.map(
({ feedId, picture, content, createdOn, feedMetaData, user }) => (
<FeedCard
key={feedId}
feedId={feedId}
picture={picture}
content={content}
createdOn={createdOn}
username={user.username}
firstName={user.firstName}
lastName={user.lastName}
profilePicture={user.profile.picture}
feedMetaData={feedMetaData}
/>
)
)}
</div>
</InfiniteScroll>
</article>
</main>
)
}
export default Dashboard
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