implement zzz folder b00tc4mp#68

staff/nerina-castillo/ponies/zzz/app1/data/deletePost.mjs

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+function deletePost(condition) {
+  const posts =
+    localStorage.posts !== undefined ? JSON.parse(localStorage.posts) : [];
+
+  const postIndex = posts.findIndex(condition);
+
+  if (postIndex > -1) {
+    posts.splice(postIndex, 1);
+
+    localStorage.posts = JSON.stringify(posts);
+  }
+}
+
+export default deletePost;

staff/nerina-castillo/ponies/zzz/app1/data/findPost.mjs

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+function findPost(condition) {
+  const posts =
+    localStorage.posts !== undefined ? JSON.parse(localStorage.posts) : [];
+
+  const post = posts.find(condition);
+
+  return post || null;
+}
+
+export default findPost;

staff/nerina-castillo/ponies/zzz/app1/data/findPosts.mjs

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+function findPosts(condition) {
+  const posts =
+    localStorage.posts !== undefined ? JSON.parse(localStorage.posts) : [];
+
+  const foundPosts = posts.filter(condition);
+
+  return foundPosts;
+}
+
+export default findPosts;

staff/nerina-castillo/ponies/zzz/app1/data/findUser.mjs

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+function findUser(condition) {
+  const users =
+    localStorage.users !== undefined ? JSON.parse(localStorage.users) : [];
+
+  const user = users.find(condition);
+
+  return user || null;
+}
+
+export default findUser;

staff/nerina-castillo/ponies/zzz/app1/data/index.mjs

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+import deletePost from "./deletePost.js";
+import findPost from "./findPost.js";
+import findPosts from "./findPosts.js";
+import findUser from "./findUser.js";
+import insertPost from "./insertPost.js";
+import insertUser from "./insertUser.js";
+import updatePost from "./updatePost.js";
+import updateUser from "./updateUser.js";
+
+const data = {
+  deletePost,
+  findPost,
+  findPosts,
+  findUser,
+  insertPost,
+  insertUser,
+  updatePost,
+  updateUser,
+};
+
+export default data;

staff/nerina-castillo/ponies/zzz/app1/data/insertPost.mjs

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+function insertPost(post) {
+  const posts =
+    localStorage.posts !== undefined ? JSON.parse(localStorage.posts) : [];
+
+  posts.push(post);
+
+  localStorage.posts = JSON.stringify(posts);
+}
+
+export default insertPost;

staff/nerina-castillo/ponies/zzz/app1/data/insertUser.mjs

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+function insertUser(user) {
+  const users =
+    localStorage.users !== undefined ? JSON.parse(localStorage.users) : [];
+
+  users.push(user);
+
+  localStorage.users = JSON.stringify(users);
+}
+
+export default insertUser;

staff/nerina-castillo/ponies/zzz/app1/data/updatePost.mjs

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+function updatePost(condition, post) {
+  const posts =
+    localStorage.posts !== undefined ? JSON.parse(localStorage.posts) : [];
+
+  const postIndex = posts.findIndex(condition);
+
+  if (postIndex > -1) {
+    posts.splice(postIndex, 1, post);
+
+    localStorage.posts = JSON.stringify(posts);
+  }
+}
+
+export default updatePost;

staff/nerina-castillo/ponies/zzz/app1/data/updateUser.mjs

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+function updateUser(condition, user) {
+  const users =
+    localStorage.users !== undefined ? JSON.parse(localStorage.users) : [];
+
+  const index = users.findIndex(condition);
+
+  if (index > -1) {
+    users.splice(index, 1, user);
+
+    localStorage.users = JSON.stringify(users);
+  }
+}
+
+export default updateUser;

staff/nerina-castillo/ponies/zzz/app1/logic/createPost.mjs

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+import data from "../data/index.js";
+
+import generateId from "../util/generateId.js";
+
+const createPost = (image, caption) => {
+  if (!image.startsWith("http")) throw new Error("invalid image");
+
+  const post = {
+    id: generateId(),
+    image: image,
+    caption: caption,
+    author: sessionStorage.username,
+    date: new Date().toISOString(),
+    likes: [],
+  };
+
+  data.insertPost(post);
+};
+
+export default createPost;

staff/nerina-castillo/ponies/zzz/app1/logic/deletePost.mjs

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+import data from "../data/index.js";
+
+const deletePost = (postId) => {
+  if (postId.trim().length === 0) throw new Error("invalid postId");
+
+  const post = data.findPost((post) => post.id === postId);
+
+  if (post === null) throw new Error("post not found");
+
+  data.deletePost((post) => post.id === postId);
+};
+
+export default deletePost;

staff/nerina-castillo/ponies/zzz/app1/logic/getAllFavPosts.mjs

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+import data from "../data/index.js";
+
+const getAllFavPosts = () => {
+  const user = data.findUser(
+    (user) => user.username === sessionStorage.username
+  );
+
+  if (user === null) throw new Error("user not found");
+
+  const posts = data.findPosts((post) => user.favs.includes(post.id));
+
+  posts.forEach((post) => {
+    post.fav = user.favs.includes(post.id);
+    post.like = post.likes.includes(sessionStorage.username);
+    post.following = user.following.includes(post.author);
+  });
+
+  return posts.reverse();
+};
+
+export default getAllFavPosts;

staff/nerina-castillo/ponies/zzz/app1/logic/getAllFavPosts.test.mjs

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+import getAllFavPosts from "./getAllFavPosts.js";
+
+console.info("TEST getAllFavPosts");
+
+console.info("CASE get all fav posts from mamoracho");
+
+sessionStorage.username = "caulifFlower";
+
+const favs = getAllFavPosts();
+
+console.log(favs);

staff/nerina-castillo/ponies/zzz/app1/logic/getAllFollowingUsersPosts.mjs

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+import data from "../data/index.js";
+
+const getAllFollowingUserPosts = () => {
+  const user = data.findUser(
+    (user) => user.username === sessionStorage.username
+  );
+
+  if (user === null) throw new Error("user not found");
+
+  const posts = data.findPosts((post) => user.following.includes(post.author));
+
+  posts.forEach((post) => {
+    post.fav = user.favs.includes(post.id);
+    post.like = post.likes.includes(sessionStorage.username);
+    post.following = user.following.includes(post.author);
+  });
+
+  return posts.reverse();
+};
+
+export default getAllFollowingUserPosts;

staff/nerina-castillo/ponies/zzz/app1/logic/getAllPosts.mjs

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+import data from "../data/index.js";
+
+const getAllPosts = () => {
+  const user = data.findUser(
+    (user) => user.username === sessionStorage.username
+  );
+
+  if (user === null) throw new Error("User not found");
+
+  const posts = data.findPosts(() => true);
+
+  posts.forEach((post) => {
+    post.fav = user.favs.includes(post.id);
+    post.like = post.likes.includes(sessionStorage.username);
+    post.following = user.following.includes(post.author);
+  });
+
+  return posts.reverse();
+};
+
+export default getAllPosts;

staff/nerina-castillo/ponies/zzz/app1/logic/getUserName.mjs

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+import data from "../data/index.js";
+
+const getUserName = () => {
+  const user = data.findUser(
+    (user) => user.username === sessionStorage.username
+  );
+
+  if (user === null) throw new Error("user not found");
+
+  return user.name;
+};
+
+export default getUserName;

staff/nerina-castillo/ponies/zzz/app1/logic/getUserUsername.mjs

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+const getUserUsername = () => sessionStorage.username;
+
+export default getUserUsername;

staff/nerina-castillo/ponies/zzz/app1/logic/index.mjs

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+import getAllPosts from "./getAllPosts.js";
+import getUserName from "./getUserName.js";
+import getUserUsername from "./getUserUsername.js";
+import loginUser from "./loginUser.js";
+import logoutUser from "./logoutUser.js";
+import registerUser from "./registerUser.js";
+import toggleLikePost from "./toggleLikePost.js";
+import updatePostCaption from "./updatePostCaption.js";
+import createPost from "./createPost.js";
+import deletePost from "./deletePost.js";
+import toggleFavPost from "./toggleFavPost.js";
+import getAllFavPosts from "./getAllFavPosts.js";
+import toggleFollowUser from "./toggleFollowUser.js";
+import getAllFollowingUserPosts from "./getAllFollowingUserPosts.js";
+
+const logic = {
+  getAllPosts,
+  getUserName,
+  getUserUsername,
+  loginUser,
+  logoutUser,
+  registerUser,
+  toggleLikePost,
+  updatePostCaption,
+  createPost,
+  deletePost,
+  toggleFavPost,
+  getAllFavPosts,
+  toggleFollowUser,
+  getAllFollowingUserPosts,
+};
+
+export default logic;

staff/nerina-castillo/ponies/zzz/app1/logic/loginUser.mjs

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+import data from "../data/index.js";
+
+const loginUser = (username, password) => {
+  if (username.trim().length < 4) throw new Error("invalid username");
+
+  if (password.trim().length < 8) throw new Error("invalid password");
+
+  const user = data.findUser((user) => user.username === username);
+
+  if (user === null) throw new Error("username does not exist");
+
+  if (user.password !== password) throw new Error("wrong password");
+
+  sessionStorage.username = username;
+};
+
+export default loginUser;

staff/nerina-castillo/ponies/zzz/app1/logic/logoutUser.mjs

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+const logoutUser = () => delete sessionStorage.username;
+
+export default logoutUser;

staff/nerina-castillo/ponies/zzz/app1/logic/registerUser.mjs

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+import data from "../data/index.js";
+
+const email_regex = /^[a-z0-9._]+@[a-z0-9.-]{3,63}\.[a-z]{2,10}$/;
+const name_regex = /^(?!.*\s{2})[a-zA-Z ]{3,16}$/;
+const user_regex = /^(?!.*\s{2})[a-zA-Z0-9._-]{4,16}$/;
+
+const registerUser = (
+  name,
+  surname,
+  email,
+  username,
+  password,
+  passwordRepeat
+) => {
+  if (!name_regex.test(name.trim())) throw new Error("invalid name");
+
+  if (!name_regex.test(surname.trim())) throw new Error("ivalid surname");
+
+  if (!email_regex.test(email)) throw new Error("invalid email");
+
+  if (!user_regex.test(username)) throw new Error("invalid username");
+
+  if (password.trim().length < 8) throw new Error("invalid password");
+
+  if (password !== passwordRepeat) throw new Error("passwords do not match");
+
+  let user = data.findUser((user) => user.email === email);
+
+  if (user !== null) throw new Error("email already exists");
+
+  user = data.findUser((user) => user.username === username);
+
+  if (user !== null) throw new Error("username already exists");
+
+  user = {
+    name: name,
+    surname: surname,
+    email: email,
+    username: username,
+    password: password,
+    favs: [],
+    following: [],
+  };
+
+  data.insertUser(user);
+};
+
+export default registerUser;

staff/nerina-castillo/ponies/zzz/app1/logic/test.html

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+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>TEST logic</title>
+  </head>
+  <body>
+    <h1>TEST logic</h1>
+    <script type="module" src="getAllFavPosts.test.js"></script>
+  </body>
+</html>

staff/nerina-castillo/ponies/zzz/app1/logic/toggleFavPost.mjs

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+import data from "../data/index.js";
+
+function toggleFavPost(postId) {
+  if (postId.trim().length === 0) throw new Error("invalid postId");
+
+  const user = data.findUser(
+    (user) => user.username === sessionStorage.username
+  );
+
+  if (user === null) throw new Error("user not found");
+
+  const post = data.findPost((post) => post.id === postId);
+
+  if (post === null) throw new Error("post not found");
+
+  const index = user.favs.indexOf(postId);
+
+  if (index < 0) user.favs.push(postId);
+  else user.favs.splice(index, 1);
+
+  data.updateUser((user) => user.username === sessionStorage.username, user);
+}
+
+export default toggleFavPost;