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/* VV frontend: лента (scroll-snap) + сетка, лайки, теги. Без фреймворков. */
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const $ = (s) => document.querySelector(s);
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const feed = $("#feed"), grid = $("#grid"), chips = $("#chips");
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const state = { tag: "", q: "", sort: "new", page: 1, pages: 1, items: [], tagFor: null,
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loading: false, current: null };
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const liked = new Set(JSON.parse(localStorage.getItem("vv_liked") || "[]"));
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const saveLiked = () => localStorage.setItem("vv_liked", JSON.stringify([...liked].slice(-500)));
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async function api(path, opts) {
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const r = await fetch(path, opts);
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if (!r.ok) throw new Error(await r.text());
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return r.status === 204 ? null : r.json();
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}
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/* --- теги-чипсы --- */
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async function loadTags() {
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const tags = await api("/api/tags").catch(() => []);
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chips.innerHTML = "";
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const all = document.createElement("button");
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all.textContent = "Все";
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all.className = state.tag ? "" : "on";
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all.onclick = () => { state.tag = ""; state.page = 1; loadTags(); reload(); };
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chips.append(all);
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for (const t of tags.slice(0, 40)) {
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const b = document.createElement("button");
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b.textContent = `#${t.name} ${t.count}`;
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b.className = state.tag === t.name ? "on" : "";
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b.onclick = () => { state.tag = t.name; state.page = 1; loadTags(); reload(); };
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chips.append(b);
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}
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}
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/* --- загрузка списка --- */
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async function fetchVideos(append) {
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const p = new URLSearchParams({
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tag: state.tag, q: state.q, sort: state.sort,
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page: state.page, per_page: 20,
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});
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const data = await api("/api/videos?" + p);
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state.pages = data.pages;
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state.items = append ? state.items.concat(data.items) : data.items;
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return data.items;
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}
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function slideEl(v) {
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const s = document.createElement("section");
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s.className = "slide";
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s.dataset.file = v.file;
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const tags = v.tags.map((t) => `<span class="tag" data-tag="${t}">#${t}</span>`).join(" ");
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s.innerHTML = `
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<video src="${v.url}" loop muted playsinline preload="metadata"></video>
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<div class="hint">❤️</div>
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<div class="meta"><div class="fname">${escapeHtml(v.file)}</div><div>${tags}</div></div>
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<div class="actions">
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<button class="like ${liked.has(v.file) ? "liked" : ""}">❤️<small>${v.likes}</small></button>
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<button class="tagbtn">🏷️</button>
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<a href="${v.url}" download><button type="button">⬇️</button></a>
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</div>`;
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const video = s.querySelector("video");
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s.querySelector(".like").onclick = () => likeVideo(v.file, s);
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s.querySelector(".tagbtn").onclick = () => openTagForm(v.file);
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s.querySelectorAll(".tag").forEach((el) => {
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el.onclick = () => { state.tag = el.dataset.tag; state.page = 1; loadTags(); reload(); };
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});
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// тап по центру = play/pause, даблтап = лайк
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let lastTap = 0;
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video.onclick = () => {
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const now = Date.now();
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if (now - lastTap < 300) likeVideo(v.file, s);
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else if (video.paused) video.play().catch(() => {});
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else video.pause();
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lastTap = now;
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};
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return s;
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}
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function escapeHtml(s) {
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return s.replace(/[&<>"']/g, (c) => ({"&":"&","<":"<",">":">",'"':""","'":"'"}[c]));
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}
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async function reload() {
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feed.innerHTML = ""; grid.innerHTML = "";
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state.page = 1; state.current = null;
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state.loading = true;
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const items = await fetchVideos(false).catch(() => []);
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state.loading = false;
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if (!items.length) {
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feed.innerHTML = `<div class="empty">Ничего не найдено 😢</div>`;
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return;
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}
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renderFeed(items);
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renderGrid(items);
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observeSlides();
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}
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async function loadMore() {
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if (state.loading || state.page >= state.pages) return;
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state.loading = true;
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state.page++;
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const before = state.items.length;
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const items = await fetchVideos(true).catch(() => []);
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state.loading = false;
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const fresh = state.items.slice(before);
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if (!fresh.length) return;
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// убрать старую кнопку "Ещё" перед дорисовкой
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feed.querySelector(".more")?.remove();
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renderFeed(fresh, true);
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renderGrid(fresh, true);
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observeSlides();
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void items;
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}
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function renderFeed(items, append) {
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if (!append) feed.innerHTML = "";
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for (const v of items) feed.append(slideEl(v));
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if (state.page < state.pages) {
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const b = document.createElement("button");
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b.className = "more"; b.textContent = "Ещё ⬇";
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b.onclick = () => { b.remove(); loadMore(); };
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feed.append(b);
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}
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}
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function renderGrid(items, append) {
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if (!append) grid.innerHTML = "";
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for (const v of items) {
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const c = document.createElement("div");
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c.className = "card";
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c.innerHTML = `
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<video src="${v.url}#t=0.5" preload="metadata" muted playsinline></video>
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<div class="row"><span>❤️ ${v.likes}</span><span>${escapeHtml(shortName(v.file))}</span></div>
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<a class="open" href="#"></a>`;
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c.querySelector(".open").onclick = (e) => {
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e.preventDefault();
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setMode("feed");
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const el = feed.querySelector(`[data-file="${CSS.escape(v.file)}"]`);
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if (el) el.scrollIntoView();
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};
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grid.append(c);
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}
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}
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function shortName(f) {
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return f.length > 18 ? f.slice(0, 17) + "…" : f;
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}
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/* автоплей видимого слайда */
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let observer;
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function observeSlides() {
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observer && observer.disconnect();
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observer = new IntersectionObserver((entries) => {
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for (const e of entries) {
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const video = e.target.querySelector("video");
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if (!video) continue;
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if (e.intersectionRatio > 0.6) {
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state.current = e.target;
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video.muted = false;
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video.play().catch(() => { video.muted = true; video.play().catch(() => {}); });
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// догружаем следующую страницу заранее
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const slides = [...feed.querySelectorAll(".slide")];
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if (slides.indexOf(e.target) > slides.length - 4) loadMore();
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} else {
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video.pause();
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video.muted = true;
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}
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}
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}, { root: feed, threshold: [0.6] });
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feed.querySelectorAll(".slide").forEach((s) => observer.observe(s));
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}
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/* --- лайки --- */
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async function likeVideo(file, slide) {
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const btn = slide.querySelector(".like");
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const count = btn.querySelector("small");
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const data = await api("/api/videos/" + encodeURIComponent(file) + "/like", { method: "POST" })
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.catch(() => null);
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if (!data) return;
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count.textContent = data.likes;
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liked.add(file); saveLiked();
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btn.classList.add("liked");
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if (!data.already) {
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const hint = slide.querySelector(".hint");
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hint.style.opacity = 1;
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setTimeout(() => (hint.style.opacity = 0), 500);
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}
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}
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/* --- теги --- */
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function openTagForm(file) {
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state.tagFor = file;
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$("#tagform").classList.add("show");
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$("#taginput").value = "";
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$("#taginput").focus();
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}
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$("#tagform").onsubmit = async (e) => {
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e.preventDefault();
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const tag = $("#taginput").value.trim();
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if (!tag || !state.tagFor) return;
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const data = await api("/api/videos/" + encodeURIComponent(state.tagFor) + "/tags", {
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method: "POST",
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headers: { "Content-Type": "application/json" },
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body: JSON.stringify({ tag }),
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}).catch((err) => { alert("Не вышло: " + err.message); return null; });
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if (!data) return;
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$("#tagform").classList.remove("show");
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loadTags();
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reload();
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};
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/* --- режимы, поиск, клавиатура --- */
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function setMode(m) {
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document.body.classList.toggle("mode-grid", m === "grid");
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$("#btn-feed").classList.toggle("on", m === "feed");
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$("#btn-grid").classList.toggle("on", m === "grid");
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}
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$("#btn-feed").onclick = () => setMode("feed");
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$("#btn-grid").onclick = () => setMode("grid");
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let qTimer;
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$("#q").oninput = (e) => {
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clearTimeout(qTimer);
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qTimer = setTimeout(() => { state.q = e.target.value.trim(); reload(); }, 400);
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};
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$("#sort").onchange = (e) => { state.sort = e.target.value; reload(); };
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document.addEventListener("keydown", (e) => {
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if (e.target.tagName === "INPUT" || e.target.tagName === "SELECT") return;
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const cur = state.current && document.contains(state.current) ? state.current : $(".slide");
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if (e.key === "ArrowDown" || e.key === "ArrowUp") {
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e.preventDefault();
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const slides = [...feed.querySelectorAll(".slide")];
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const i = slides.indexOf(cur);
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const next = slides[i + (e.key === "ArrowDown" ? 1 : -1)];
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if (next) next.scrollIntoView({ behavior: "smooth" });
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}
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if ((e.key === "l" || e.key === "д" || e.key === "L") && cur) {
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likeVideo(cur.dataset.file, cur);
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}
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});
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loadTags();
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reload();
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