import { createContext, useState } from "react";
import { faker } from "@faker-js/faker";
//1. create the context
const PostContext = createContext();
// 2. create the Provider function that returns the provider
function PostProvider({children}){
// 3. add all state and functions we need
const [posts, setPosts] = useState(() =>
Array.from({ length: 30 }, () => createRandomPost())
);
const [searchQuery, setSearchQuery] = useState("");
// Derived state. These are the posts that will actually be displayed
const searchedPosts = searchQuery.length > 0 ? posts.filter((post) => `${post.title} ${post.body}`.toLowerCase().includes(searchQuery.toLowerCase())) : posts;
function handleAddPost(post) {
setPosts((posts) => (
[...posts, post]
))
}
function handleClearPosts() {
setPosts([]);
}
function createRandomPost() {
return {
title: `${faker.hacker.adjective()} ${faker.hacker.noun()}`,
body: faker.hacker.phrase(),
};
}
// 4. return all values we need to the provider
// the values represent all state and functions we have above using an object
// then we call each key inside the wrapped component where each state or function is needed
return(
<PostContext.Provider value={{
posts: searchedPosts, // the derived state that holds the posts
query: searchQuery, // the query
querySetter: setSearchQuery, // query setter function
addPostHandler: handleAddPost, // add post function
clearPostHander: handleClearPosts, // clear posts function
}}>
{children}
</PostContext.Provider>
)
} // close the PostProvider function
// 5.export the postContext to use AND the Provider to wrap all components
export {PostContext, PostProvider}
Comments
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