425 lines
16 KiB
JavaScript
425 lines
16 KiB
JavaScript
const elements = {
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renderer: document.querySelector("#renderer"),
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discover: document.querySelector("#discover"),
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previous: document.querySelector("#previous"),
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play: document.querySelector("#play"),
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stop: document.querySelector("#stop"),
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next: document.querySelector("#next"),
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seek: document.querySelector("#seek"),
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position: document.querySelector("#position"),
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duration: document.querySelector("#duration"),
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repeat: document.querySelector("#repeat"),
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volume: document.querySelector("#volume"),
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volumeValue: document.querySelector("#volume-value"),
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library: document.querySelector("#library"),
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libraryUp: document.querySelector("#library-up"),
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breadcrumb: document.querySelector("#breadcrumb"),
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libraryEmpty: document.querySelector("#library-empty"),
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libraryEntries: document.querySelector("#library-entries"),
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title: document.querySelector("#now-title"),
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meta: document.querySelector("#now-meta"),
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tabs: document.querySelector("#tabs"),
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tabAdd: document.querySelector("#tab-add"),
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count: document.querySelector("#track-count"),
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playlistClear: document.querySelector("#playlist-clear"),
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playlistEmpty: document.querySelector("#playlist-empty"),
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playlist: document.querySelector("#playlist"),
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bits: document.querySelector("#audio-bits"),
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rate: document.querySelector("#audio-rate"),
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channels: document.querySelector("#audio-channels"),
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format: document.querySelector("#audio-format"),
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source: document.querySelector("#audio-source"),
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status: document.querySelector("#status"),
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};
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let state = null;
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let seekBusy = false;
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let draggedTrack = null;
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let commandBusy = false;
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function formatTime(value) {
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if (!Number.isFinite(value) || value < 0) return "00:00:00";
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const whole = Math.floor(value);
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const hours = Math.floor(whole / 3600).toString().padStart(2, "0");
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const minutes = Math.floor((whole % 3600) / 60).toString().padStart(2, "0");
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const seconds = (whole % 60).toString().padStart(2, "0");
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return `${hours}:${minutes}:${seconds}`;
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}
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function setStatus(message) {
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elements.status.textContent = message || "";
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}
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async function api(path, body) {
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const options = body === undefined
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? { cache: "no-store" }
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: {
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method: "POST",
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headers: { "Content-Type": "application/json" },
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body: JSON.stringify(body),
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};
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const response = await fetch(path, options);
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const data = await response.json();
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if (!response.ok) throw new Error(data.error || `HTTP ${response.status}`);
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return data;
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}
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async function command(name, data = {}, pendingMessage = "") {
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if (pendingMessage) setStatus(pendingMessage);
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commandBusy = true;
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try {
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render(await api(`/api/command/${name}`, data));
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} catch (error) {
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setStatus(error.message);
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} finally {
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commandBusy = false;
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}
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}
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function replaceSelect(select, items, selectedId, signature) {
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if (select.dataset.signature !== signature) {
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select.replaceChildren(...items.map((item) => {
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const option = document.createElement("option");
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option.value = item.id;
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option.textContent = item.label;
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return option;
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}));
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select.dataset.signature = signature;
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}
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select.value = selectedId || "";
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}
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function renderSelectors(nextState) {
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const rendererItems = nextState.renderers.map((item) => ({
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id: item.id,
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label: `${item.name} · ${item.kind.toUpperCase()}`,
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}));
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replaceSelect(
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elements.renderer,
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rendererItems,
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nextState.rendererId,
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rendererItems.map((item) => item.id).join("|"),
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);
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const libraryItems = nextState.libraries.map((item) => ({
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id: item.id,
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label: item.name,
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}));
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replaceSelect(
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elements.library,
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libraryItems,
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nextState.libraryId,
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libraryItems.map((item) => `${item.id}:${item.label}`).join("|"),
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);
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elements.discover.classList.toggle("busy", nextState.discovering);
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elements.discover.disabled = nextState.discovering;
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elements.library.disabled = nextState.libraries.length === 0;
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}
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function entryAction(label, title, handler) {
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const button = document.createElement("button");
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button.className = "entry-action";
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button.type = "button";
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button.textContent = label;
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button.title = title;
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button.setAttribute("aria-label", title);
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button.addEventListener("click", (event) => {
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event.stopPropagation();
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handler();
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});
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return button;
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}
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function renderBrowser(nextState) {
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const selectedLibrary = nextState.libraries.find((item) => item.id === nextState.libraryId);
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const path = [selectedLibrary?.name, ...nextState.browser.path].filter(Boolean);
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elements.breadcrumb.textContent = path.length ? path.join(" / ") : "Geen bibliotheek";
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elements.breadcrumb.title = elements.breadcrumb.textContent;
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elements.libraryUp.disabled = !nextState.browser.canGoUp;
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elements.libraryEmpty.hidden = nextState.libraries.length > 0;
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const signature = nextState.browser.entries
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.map((entry) => `${entry.index}:${entry.kind}:${entry.name}`)
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.join("|");
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if (elements.libraryEntries.dataset.signature === signature) return;
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const rows = nextState.browser.entries.map((entry) => {
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const row = document.createElement("li");
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row.className = "library-entry";
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row.tabIndex = 0;
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const icon = document.createElement("span");
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icon.className = "entry-icon";
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icon.textContent = entry.kind === "container" ? "▸" : "♪";
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const name = document.createElement("span");
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name.className = "entry-name";
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name.textContent = entry.name;
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name.title = entry.name;
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const actions = document.createElement("span");
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actions.className = "entry-actions";
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actions.append(
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entryAction("▶", `${entry.name} nu afspelen`, () => {
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command("item-play", { index: entry.index }, `${entry.name} laden…`);
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}),
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entryAction("＋", `${entry.name} toevoegen`, () => {
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command("item-add", { index: entry.index }, `${entry.name} toevoegen…`);
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}),
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);
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row.append(icon, name, actions);
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if (entry.kind === "container") {
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row.addEventListener("click", () => command("browse", { index: entry.index }));
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} else {
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row.addEventListener("dblclick", () => {
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command("item-play", { index: entry.index }, `${entry.name} laden…`);
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});
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}
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row.addEventListener("keydown", (event) => {
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if (event.key === "Enter") {
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command(
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entry.kind === "container" ? "browse" : "item-play",
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{ index: entry.index },
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entry.kind === "track" ? `${entry.name} laden…` : "",
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);
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} else if (event.key === "+") {
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command("item-add", { index: entry.index }, `${entry.name} toevoegen…`);
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}
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});
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return row;
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});
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elements.libraryEntries.replaceChildren(...rows);
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elements.libraryEntries.dataset.signature = signature;
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}
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function renderTabs(nextState) {
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const signature = nextState.tabs
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.map((tab) => `${tab.index}:${tab.name}:${tab.count}`)
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.join("|");
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if (elements.tabs.dataset.signature !== signature) {
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const tabs = nextState.tabs.map((tab) => {
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const button = document.createElement("button");
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button.className = "tab";
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button.type = "button";
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button.dataset.index = tab.index;
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button.setAttribute("role", "tab");
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const name = document.createElement("span");
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name.className = "tab-name";
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name.textContent = tab.name;
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const count = document.createElement("span");
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count.className = "tab-count";
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count.textContent = tab.count;
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button.append(name, count);
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button.addEventListener("click", () => command("tab-select", { index: tab.index }));
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button.addEventListener("dblclick", () => {
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const newName = window.prompt("Naam van de afspeellijst", tab.name);
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if (newName !== null) command("tab-rename", { index: tab.index, name: newName });
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});
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if (nextState.tabs.length > 1) {
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const remove = document.createElement("span");
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remove.className = "tab-delete";
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remove.textContent = "×";
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remove.title = "Afspeellijst verwijderen";
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remove.addEventListener("click", (event) => {
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event.stopPropagation();
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command("tab-delete", { index: tab.index });
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});
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button.append(remove);
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}
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return button;
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});
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elements.tabs.replaceChildren(...tabs);
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elements.tabs.dataset.signature = signature;
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}
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for (const tab of elements.tabs.children) {
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const active = Number(tab.dataset.index) === nextState.currentTab;
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tab.classList.toggle("active", active);
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tab.setAttribute("aria-selected", active ? "true" : "false");
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}
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}
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function renderPlaylist(nextState) {
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const signature = nextState.tracks
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.map((track) => `${track.index}:${track.title}:${track.artist}:${track.album}:${track.duration}`)
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.join("|");
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if (elements.playlist.dataset.signature !== signature) {
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const rows = nextState.tracks.map((track) => {
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const row = document.createElement("tr");
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row.className = "playlist-row";
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row.tabIndex = 0;
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row.draggable = true;
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row.dataset.index = track.index;
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const number = document.createElement("td");
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number.className = "track-number number-column";
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number.textContent = String(track.index + 1);
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const titleCell = document.createElement("td");
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const title = document.createElement("div");
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title.className = "track-title";
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title.textContent = track.title;
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const artist = document.createElement("div");
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artist.className = "track-artist";
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artist.textContent = track.artist || track.source;
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titleCell.append(title, artist);
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const album = document.createElement("td");
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album.className = "track-album";
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album.textContent = track.album;
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const duration = document.createElement("td");
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duration.className = "track-duration duration-column";
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duration.textContent = formatTime(track.duration);
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const action = document.createElement("td");
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action.className = "action-column";
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const remove = document.createElement("button");
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remove.className = "row-action";
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remove.type = "button";
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remove.textContent = "×";
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remove.title = `${track.title} verwijderen`;
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remove.setAttribute("aria-label", `${track.title} verwijderen`);
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remove.addEventListener("click", (event) => {
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event.stopPropagation();
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command("track-remove", { index: track.index });
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});
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action.append(remove);
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row.append(number, titleCell, album, duration, action);
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row.addEventListener("click", () => command("play", { index: track.index }));
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row.addEventListener("keydown", (event) => {
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if (event.key === "Enter" || event.key === " ") {
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event.preventDefault();
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command("play", { index: track.index });
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} else if (event.key === "Delete") {
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command("track-remove", { index: track.index });
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}
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});
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row.addEventListener("dragstart", () => { draggedTrack = track.index; });
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row.addEventListener("dragover", (event) => event.preventDefault());
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row.addEventListener("drop", (event) => {
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event.preventDefault();
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if (Number.isInteger(draggedTrack) && draggedTrack !== track.index) {
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command("track-move", { from: draggedTrack, to: track.index });
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}
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draggedTrack = null;
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});
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return row;
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});
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elements.playlist.replaceChildren(...rows);
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elements.playlist.dataset.signature = signature;
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}
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for (const row of elements.playlist.children) {
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row.classList.toggle("current", Number(row.dataset.index) === nextState.currentIndex);
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}
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elements.playlistEmpty.hidden = nextState.tracks.length > 0;
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elements.count.textContent = `${nextState.tracks.length} ${nextState.tracks.length === 1 ? "track" : "tracks"}`;
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elements.playlistClear.disabled = nextState.tracks.length === 0;
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}
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function renderPlayer(nextState) {
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const current = Number.isInteger(nextState.currentIndex)
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? nextState.tracks[nextState.currentIndex]
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: null;
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elements.title.textContent = current ? current.title : "Nog niets gekozen";
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elements.meta.textContent = current
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? [current.artist, current.album].filter(Boolean).join(" · ") || current.source
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: "Voeg een track toe vanuit de bibliotheek";
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const playing = nextState.state === "playing" || nextState.state === "starting";
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elements.play.textContent = playing ? "Ⅱ" : "▶";
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elements.play.setAttribute("aria-label", playing ? "Pauzeren" : "Afspelen");
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elements.play.disabled = nextState.tracks.length === 0;
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elements.previous.disabled = nextState.tracks.length === 0;
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elements.next.disabled = nextState.tracks.length === 0;
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elements.stop.disabled = nextState.state === "stopped";
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elements.position.textContent = formatTime(nextState.position);
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elements.duration.textContent = formatTime(nextState.duration);
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if (!seekBusy) {
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elements.seek.value = nextState.duration
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? Math.min(100, (nextState.position / nextState.duration) * 100)
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: 0;
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}
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elements.seek.disabled = !nextState.duration;
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elements.volume.value = nextState.volume;
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elements.volumeValue.value = `${Math.round(nextState.volume)}%`;
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elements.repeat.dataset.repeat = nextState.repeat;
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elements.repeat.classList.toggle("active", nextState.repeat !== "off");
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const repeatNames = { off: "Herhalen uit", all: "Alles herhalen", one: "Eén track herhalen" };
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elements.repeat.title = repeatNames[nextState.repeat] || repeatNames.off;
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elements.bits.textContent = nextState.bits ? `${nextState.bits} bit` : "— bit";
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elements.rate.textContent = nextState.rate ? `${(nextState.rate / 1000).toFixed(1)} kHz` : "— kHz";
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elements.channels.textContent = nextState.channels ? `${nextState.channels} kanalen` : "— kanalen";
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elements.format.textContent = nextState.format || "—";
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elements.source.textContent = nextState.source || "—";
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}
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function render(nextState) {
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state = nextState;
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renderSelectors(nextState);
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renderBrowser(nextState);
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renderTabs(nextState);
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renderPlaylist(nextState);
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renderPlayer(nextState);
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setStatus(nextState.error || (nextState.discovering ? "Netwerkspelers zoeken…" : ""));
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}
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elements.play.addEventListener("click", () => {
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if (!state) return;
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const playing = state.state === "playing" || state.state === "starting";
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command(playing ? "pause" : state.state === "paused" ? "resume" : "play");
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});
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elements.previous.addEventListener("click", () => command("previous"));
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elements.stop.addEventListener("click", () => command("stop"));
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elements.next.addEventListener("click", () => command("next"));
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elements.repeat.addEventListener("click", () => {
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if (!state) return;
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const next = state.repeat === "off" ? "all" : state.repeat === "all" ? "one" : "off";
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command("repeat", { mode: next });
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});
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elements.renderer.addEventListener("change", () => command("renderer", { id: elements.renderer.value }));
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elements.discover.addEventListener("click", async () => {
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try {
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render(await api("/api/discover", {}));
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} catch (error) {
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setStatus(error.message);
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}
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});
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elements.volume.addEventListener("input", () => {
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elements.volumeValue.value = `${elements.volume.value}%`;
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});
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elements.volume.addEventListener("change", () => command("volume", { value: Number(elements.volume.value) }));
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elements.seek.addEventListener("pointerdown", () => { seekBusy = true; });
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elements.seek.addEventListener("change", () => {
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seekBusy = false;
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command("seek", { percentage: Number(elements.seek.value) });
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});
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elements.library.addEventListener("change", () => command("library", { id: elements.library.value }));
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elements.libraryUp.addEventListener("click", () => command("up"));
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elements.tabAdd.addEventListener("click", () => command("tab-add"));
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elements.playlistClear.addEventListener("click", () => command("playlist-clear"));
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async function refresh() {
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if (commandBusy) return;
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try {
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render(await api("/api/state"));
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} catch (error) {
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setStatus(`Geen verbinding: ${error.message}`);
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}
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}
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refresh();
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setInterval(refresh, 1000);
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