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script.js
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script.js
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"use strict";
const resultsNAV = document.querySelector(".navigation1");
const favoritesNav = document.querySelector(".navigation2");
const imagesContainer = document.getElementById("images-container");
const saveConfirmed = document.querySelector(".save-confirmed");
const loader = document.getElementById("loader");
// NASA API
const demoKey = "DEMO_KEY";
const count = 10;
const apiUrl = `https://api.nasa.gov/planetary/apod?api_key=${demoKey}&count=${count}`;
let resultsArray = [];
let favorites = {};
function showContent(page) {
window.scrollTo({
top: 0,
behavior: "instant",
});
loader.classList.add("hidden");
if (page === "results") {
resultsNAV.classList.remove("hidden");
favoritesNav.classList.add("hidden");
} else {
resultsNAV.classList.add("hidden");
favoritesNav.classList.remove("hidden");
}
}
// create DOM Nodes
function createDOMNodes(page) {
const currentArray =
page === "results" ? resultsArray : Object.values(favorites);
currentArray.forEach((result) => {
// card container
const card = document.createElement("div");
card.classList.add("card");
// link
const link = document.createElement("a");
link.setAttribute("href", result.hdurl);
link.setAttribute("target", "_blank");
link.setAttribute("title", result.title);
// image
const image = document.createElement("img");
image.setAttribute("src", result.url);
image.setAttribute("alt", result.title);
image.setAttribute("title", result.title);
image.setAttribute("loading", "lazy");
image.classList.add("card-img-top");
// card body
const cardBody = document.createElement("div");
cardBody.classList.add("card-body");
// card title
const cardTitle = document.createElement("h5");
cardTitle.classList.add("card-title");
cardTitle.textContent = result.title;
// save text
const saveText = document.createElement("p");
saveText.classList.add("save-text");
if (page === "results") {
saveText.textContent = "Add To Favorites";
saveText.addEventListener("click", () => {
saveFavorite(result.title);
});
} else {
saveText.textContent = "Remove From Favorites";
saveText.addEventListener("click", () => {
deleteFavorite(result.title);
});
}
// card text
const cardText = document.createElement("p");
cardText.classList.add("card-text");
cardText.textContent = result.explanation;
// footer container
const footer = document.createElement("small");
footer.classList.add("text-muted");
// date
const date = document.createElement("strong");
date.textContent = result.date;
// copyright
const copyrightResult =
result.copyright === undefined ? "" : result.copyright;
const copyright = document.createElement("span");
copyright.textContent = ` ${copyrightResult}`;
// append
footer.append(date, copyright);
cardBody.append(cardTitle, saveText, cardText, footer);
link.appendChild(image);
card.append(link, cardBody);
imagesContainer.appendChild(card);
});
}
// update DOM
function updateDOM(page) {
if (localStorage.getItem("nasaFavorites")) {
// get data from local storage
favorites = JSON.parse(localStorage.getItem("nasaFavorites"));
}
imagesContainer.textContent = "";
createDOMNodes(page);
showContent(page);
}
// get 10 images from NASA API
async function getNasaPictures() {
// show loader
loader.classList.remove("hidden");
try {
const response = await fetch(apiUrl);
const data = await response.json();
resultsArray = data;
updateDOM("results");
} catch (error) {
console.error(error);
}
}
// add results to favorites
function saveFavorite(title) {
// loop through resultsArray to select favorite
resultsArray.forEach((result) => {
if (result.title.includes(title) && !favorites[title]) {
favorites[title] = result;
console.log(favorites);
// show save confirmation for 2 seconds
saveConfirmed.classList.remove("hidden");
setTimeout(() => {
saveConfirmed.classList.add("hidden");
}, 2000);
// set favorites to local storage
localStorage.setItem("nasaFavorites", JSON.stringify(favorites));
}
});
}
// delete favorites
function deleteFavorite(title) {
if (favorites[title]) {
delete favorites[title];
console.log(favorites);
// set favorites to local storage
localStorage.setItem("nasaFavorites", JSON.stringify(favorites));
updateDOM("favorites");
}
}
// on load
getNasaPictures();