71 lines
2.4 KiB
JavaScript
71 lines
2.4 KiB
JavaScript
// news.js because new.js makes the TypeScript language server flip out.
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// Likely because `new` is a keyword, but also, what the fuck.
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import { getSettingValue } from "treehouse/settings.js";
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import { Branch } from "treehouse/tree.js";
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const seenStatesKey = "treehouse.news.seenBranches";
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const seenStates = new Set(JSON.parse(localStorage.getItem(seenStatesKey)) || []);
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let seenCount = seenStates.size;
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let unseenCount = TREEHOUSE_NEWS_COUNT - seenCount;
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function saveSeenStates() {
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localStorage.setItem(seenStatesKey, JSON.stringify(Array.from(seenStates)));
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}
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function markAsRead(branch) {
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if (!seenStates.has(branch.namedID) && seenCount > 0) {
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let badge = document.createElement("span");
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badge.classList.add("badge", "red", "before-content");
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badge.textContent = "new";
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branch.branchContent.firstChild.insertBefore(badge, branch.branchContent.firstChild.firstChild);
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}
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seenStates.add(branch.namedID);
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}
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export function initNewsPage() {
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for (let [_, branch] of Branch.branchesByNamedID) {
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markAsRead(branch);
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}
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saveSeenStates();
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// If any branches are added past the initial load, add them to the seen set too.
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Branch.onAdded.push(branch => {
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markAsRead(branch);
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saveSeenStates();
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})
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}
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export function markAllAsUnread() {
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localStorage.removeItem(seenStatesKey);
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}
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class New extends HTMLAnchorElement {
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connectedCallback() {
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// Do not show the badge to people who have never seen any news.
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// It's just annoying in that case.
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// In case you do not wish to see the badge anymore, go to the news page and uncheck the
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// checkbox at the bottom.
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let userSawNews = seenCount > 0;
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let userWantsToSeeNews = getSettingValue("showNewPostIndicator");
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if (userSawNews && userWantsToSeeNews && unseenCount > 0) {
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this.newText = document.createElement("span");
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this.newText.classList.add("new-text");
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this.newText.textContent = this.textContent;
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this.textContent = "";
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this.appendChild(this.newText);
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this.badge = document.createElement("span");
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this.badge.classList.add("badge", "red");
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this.badge.textContent = unseenCount.toString();
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this.appendChild(this.badge);
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this.classList.add("has-news");
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}
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}
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}
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customElements.define("th-new", New, { extends: "a" });
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