feat(S04/T02): Built the explore-album-details Lit component with relea…
- frontend/src/components/explore-album-details/explore-album-details.ts
This commit is contained in:
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import { LitElement, html, css, nothing } from 'lit';
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import { customElement, property, state } from 'lit/decorators.js';
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import { designTokens } from '../../styles/tokens.css';
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import {
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LookupReleaseGroup,
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BrowseReleases,
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} from '@go/explore/Service';
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import type {
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MBReleaseGroup,
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MBRelease,
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MBTrack,
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} from '@go/explore/Service';
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import '@awesome.me/webawesome/dist/components/icon/icon.js';
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/* ── Constants ── */
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const CAA_GROUP_BASE = 'https://coverartarchive.org/release-group';
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/* ── Utility functions (duplicated per Knowledge Pattern #9 — no cross-component imports) ── */
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function CoverArtGroupURL(releaseGroupMBID: string): string {
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return `${CAA_GROUP_BASE}/${releaseGroupMBID}/front-250`;
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}
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function nameToHue(name: string): number {
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let hash = 0;
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for (let i = 0; i < name.length; i++) {
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hash = name.charCodeAt(i) + ((hash << 5) - hash);
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}
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return Math.abs(hash) % 360;
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}
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function extractYear(dateStr: string): string {
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if (!dateStr) return '';
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return dateStr.substring(0, 4);
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}
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/**
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* Convert a duration in milliseconds to a human-readable "m:ss" string.
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* Returns "0:00" for zero/negative/NaN values.
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*/
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function formatDuration(ms: number): string {
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if (!ms || ms <= 0) return '0:00';
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const totalSeconds = Math.round(ms / 1000);
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const minutes = Math.floor(totalSeconds / 60);
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const seconds = totalSeconds % 60;
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return `${minutes}:${String(seconds).padStart(2, '0')}`;
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}
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/* ── Types ── */
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interface ReleaseCluster {
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representative: MBRelease;
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allReleases: MBRelease[];
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fingerprint: string;
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}
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/* ── Component ── */
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@customElement('explore-album-details')
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export class ExploreAlbumDetails extends LitElement {
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/* ── Public attributes ── */
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@property({ type: String, attribute: 'release-group-mbid' })
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releaseGroupMBID = '';
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@property({ type: String, attribute: 'album-name' })
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albumName = '';
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/* ── Internal state ── */
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@state() private releaseGroup: MBReleaseGroup | null = null;
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@state() private releases: MBRelease[] = [];
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@state() private loadingInfo = true;
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@state() private loadingReleases = true;
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@state() private errorInfo = '';
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@state() private errorReleases = '';
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@state() private clusteredReleases: ReleaseCluster[] = [];
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@state() private selectedRelease: MBRelease | null = null;
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@state() private minTrackCount = 0;
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@state() private maxTrackCount = 0;
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/* ── Styles ── */
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static override styles = [
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designTokens,
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css`
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:host {
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display: flex;
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flex-direction: column;
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overflow: hidden;
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height: 100%;
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}
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/* ── Header ── */
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.album-header {
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display: flex;
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align-items: center;
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gap: 20px;
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padding: 16px 20px;
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flex-shrink: 0;
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border-bottom: 1px solid
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var(--yj-border-subtle, rgba(255, 255, 255, 0.06));
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}
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.back-button {
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display: flex;
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align-items: center;
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justify-content: center;
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width: 32px;
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height: 32px;
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border: none;
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border-radius: 50%;
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background: var(--yj-bg-overlay, rgba(255, 255, 255, 0.06));
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color: var(--yj-text-primary, #fff);
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cursor: pointer;
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flex-shrink: 0;
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transition: background-color 0.15s ease;
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}
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.back-button:hover {
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background: var(--yj-bg-hover, rgba(255, 255, 255, 0.12));
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}
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.back-button wa-icon {
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font-size: 16px;
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}
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.cover-art-container {
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width: 200px;
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height: 200px;
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border-radius: 6px;
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overflow: hidden;
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background: linear-gradient(
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135deg,
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var(--yj-bg-overlay, #404040) 0%,
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var(--yj-bg-surface, #282828) 100%
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);
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display: flex;
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align-items: center;
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justify-content: center;
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flex-shrink: 0;
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position: relative;
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}
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.cover-art-container img {
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width: 100%;
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height: 100%;
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object-fit: cover;
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display: block;
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}
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.cover-art-fallback {
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display: flex;
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align-items: center;
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justify-content: center;
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width: 100%;
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height: 100%;
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position: absolute;
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inset: 0;
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}
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.cover-art-fallback wa-icon {
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color: var(--yj-text-tertiary, #888);
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font-size: 48px;
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opacity: 0.5;
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}
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.album-info {
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display: flex;
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flex-direction: column;
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gap: 4px;
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min-width: 0;
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}
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.album-title {
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font-size: 24px;
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font-weight: 700;
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color: var(--yj-text-primary, #fff);
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white-space: nowrap;
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overflow: hidden;
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text-overflow: ellipsis;
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margin: 0;
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line-height: 1.2;
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}
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.album-artist {
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font-size: var(--yj-text-lg);
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color: var(--yj-text-secondary, #b3b3b3);
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white-space: nowrap;
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overflow: hidden;
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text-overflow: ellipsis;
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}
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.album-meta {
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font-size: var(--yj-text-md);
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color: var(--yj-text-tertiary, #888);
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display: flex;
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align-items: center;
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gap: 6px;
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flex-wrap: wrap;
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}
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.meta-separator {
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opacity: 0.4;
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}
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/* ── Scrollable content ── */
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.content {
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flex: 1;
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overflow-y: auto;
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padding: 20px 24px 32px;
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display: flex;
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flex-direction: column;
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gap: 24px;
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}
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/* ── Section headers ── */
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.section-header {
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font-size: 11px;
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font-weight: 600;
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color: var(--yj-text-secondary, #b3b3b3);
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text-transform: uppercase;
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letter-spacing: 0.05em;
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margin: 0 0 12px;
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}
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/* ── Loading / error states ── */
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.section-loading {
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color: var(--yj-text-secondary, #b3b3b3);
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font-size: var(--yj-text-md);
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animation: pulse 1.5s ease-in-out infinite;
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}
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@keyframes pulse {
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0%,
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100% {
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opacity: 1;
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}
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50% {
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opacity: 0.5;
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}
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}
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.section-error {
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display: flex;
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align-items: center;
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gap: 6px;
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color: var(--yj-text-secondary, #b3b3b3);
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font-size: var(--yj-text-sm);
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}
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.section-error wa-icon {
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color: #e5534b;
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font-size: var(--yj-icon-sm);
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flex-shrink: 0;
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}
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/* ── Version selector ── */
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.version-selector {
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display: flex;
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align-items: center;
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gap: 10px;
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padding: 10px 16px;
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background: var(--yj-surface-1, rgba(255, 255, 255, 0.04));
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border-radius: 8px;
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}
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.version-selector label {
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font-size: var(--yj-text-sm);
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color: var(--yj-text-secondary, #b3b3b3);
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font-weight: 600;
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text-transform: uppercase;
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letter-spacing: 0.04em;
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white-space: nowrap;
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flex-shrink: 0;
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}
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.version-selector select {
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flex: 1;
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min-width: 0;
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padding: 6px 10px;
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background: var(--yj-bg-overlay, rgba(255, 255, 255, 0.06));
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color: var(--yj-text-primary, #fff);
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border: 1px solid var(--yj-border-subtle, rgba(255, 255, 255, 0.08));
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border-radius: 6px;
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font-size: var(--yj-text-md);
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font-family: inherit;
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cursor: pointer;
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appearance: none;
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-webkit-appearance: none;
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background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M3 5l3 3 3-3'/%3E%3C/svg%3E");
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background-repeat: no-repeat;
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background-position: right 8px center;
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padding-right: 28px;
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}
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.version-selector select:focus {
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outline: none;
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border-color: var(--yj-border-focus, rgba(255, 255, 255, 0.2));
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}
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.version-selector select option {
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background: var(--yj-bg-surface, #1e1e1e);
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color: var(--yj-text-primary, #fff);
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}
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/* ── Tracklist ── */
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.tracklist {
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display: flex;
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flex-direction: column;
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}
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.disc-separator {
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display: flex;
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align-items: center;
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gap: 12px;
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padding: 12px 0 8px;
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}
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.disc-separator::before,
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.disc-separator::after {
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content: '';
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flex: 1;
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height: 1px;
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background: var(--yj-border-subtle, rgba(255, 255, 255, 0.06));
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}
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.disc-label {
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font-size: var(--yj-text-xs);
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font-weight: 600;
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color: var(--yj-text-tertiary, #888);
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text-transform: uppercase;
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letter-spacing: 0.05em;
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white-space: nowrap;
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}
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.track-row {
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display: flex;
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align-items: center;
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gap: 12px;
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padding: 7px 12px;
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border-radius: 6px;
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cursor: default;
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transition: background 0.1s ease;
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}
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.track-row:hover {
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background: var(
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--yj-bg-overlay,
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rgba(255, 255, 255, 0.04)
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);
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}
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.track-position {
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width: 28px;
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text-align: right;
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color: var(--yj-text-tertiary, #888);
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font-size: var(--yj-text-md);
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font-variant-numeric: tabular-nums;
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flex-shrink: 0;
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}
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.track-title {
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flex: 1;
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min-width: 0;
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font-weight: 500;
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color: var(--yj-text-primary, #fff);
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font-size: var(--yj-text-md);
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white-space: nowrap;
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overflow: hidden;
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text-overflow: ellipsis;
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}
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.track-duration {
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color: var(--yj-text-tertiary, #888);
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font-size: var(--yj-text-sm);
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font-variant-numeric: tabular-nums;
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flex-shrink: 0;
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white-space: nowrap;
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}
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`,
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];
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/* ── Lifecycle ── */
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override connectedCallback() {
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super.connectedCallback();
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if (this.releaseGroupMBID) {
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void this.loadAllData();
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}
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}
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/* ── Data Loading ── */
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private async loadAllData() {
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const mbid = this.releaseGroupMBID;
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console.log(
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`[explore-album] loading: "${this.albumName}" (${mbid})`,
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);
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const [infoResult, releasesResult] = await Promise.allSettled([
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this.fetchReleaseGroup(mbid),
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this.fetchReleases(mbid),
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]);
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const summary = [
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`info=${infoResult.status}`,
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`releases=${releasesResult.status}`,
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].join(', ');
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console.log(
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`[explore-album] loaded: "${this.albumName}" (${summary})`,
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);
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}
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private async fetchReleaseGroup(mbid: string) {
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try {
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this.releaseGroup = await LookupReleaseGroup(mbid);
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} catch (err) {
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const msg = err instanceof Error ? err.message : String(err);
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this.errorInfo = msg;
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console.error(`[explore-album] LookupReleaseGroup error: ${msg}`);
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} finally {
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this.loadingInfo = false;
|
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}
|
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}
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private async fetchReleases(mbid: string) {
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try {
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const releases = await BrowseReleases(mbid);
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this.releases = releases ?? [];
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this.buildClusters();
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} catch (err) {
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const msg = err instanceof Error ? err.message : String(err);
|
||||
this.errorReleases = msg;
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console.error(`[explore-album] BrowseReleases error: ${msg}`);
|
||||
} finally {
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||||
this.loadingReleases = false;
|
||||
}
|
||||
}
|
||||
|
||||
/* ── Release Clustering (R026) ── */
|
||||
|
||||
/**
|
||||
* Groups releases by identical tracklist fingerprints (ordered track MBIDs).
|
||||
* Picks the earliest-dated representative per cluster (R028).
|
||||
* Computes min/max track counts across all releases (R027).
|
||||
*/
|
||||
private buildClusters() {
|
||||
const clusterMap = new Map<string, MBRelease[]>();
|
||||
|
||||
// Compute track counts across all releases for R027
|
||||
let minCount = Infinity;
|
||||
let maxCount = 0;
|
||||
|
||||
for (const release of this.releases) {
|
||||
const tracks = release.tracks ?? [];
|
||||
const trackCount = tracks.length;
|
||||
if (trackCount < minCount) minCount = trackCount;
|
||||
if (trackCount > maxCount) maxCount = trackCount;
|
||||
|
||||
// Fingerprint: sort tracks by (discNumber, position), join MBIDs
|
||||
const sorted = [...tracks].sort((a, b) => {
|
||||
const discDiff = (a.discNumber || 1) - (b.discNumber || 1);
|
||||
if (discDiff !== 0) return discDiff;
|
||||
return a.position - b.position;
|
||||
});
|
||||
const fingerprint = sorted.map((t) => t.mbid).join('|');
|
||||
|
||||
const existing = clusterMap.get(fingerprint);
|
||||
if (existing) {
|
||||
existing.push(release);
|
||||
} else {
|
||||
clusterMap.set(fingerprint, [release]);
|
||||
}
|
||||
}
|
||||
|
||||
if (this.releases.length === 0) {
|
||||
minCount = 0;
|
||||
}
|
||||
|
||||
this.minTrackCount = minCount;
|
||||
this.maxTrackCount = maxCount;
|
||||
|
||||
// Build clusters with earliest-dated representative per group
|
||||
const clusters: ReleaseCluster[] = [];
|
||||
for (const [fingerprint, releases] of clusterMap) {
|
||||
// Sort by date ascending — earliest first (ISO date strings sort lexicographically)
|
||||
const sorted = [...releases].sort((a, b) => {
|
||||
const da = a.date || '\uffff'; // releases without dates sort last
|
||||
const db = b.date || '\uffff';
|
||||
return da.localeCompare(db);
|
||||
});
|
||||
clusters.push({
|
||||
representative: sorted[0],
|
||||
allReleases: sorted,
|
||||
fingerprint,
|
||||
});
|
||||
}
|
||||
|
||||
// Sort clusters themselves by their representative's date (earliest first)
|
||||
clusters.sort((a, b) => {
|
||||
const da = a.representative.date || '\uffff';
|
||||
const db = b.representative.date || '\uffff';
|
||||
return da.localeCompare(db);
|
||||
});
|
||||
|
||||
this.clusteredReleases = clusters;
|
||||
|
||||
// Default to earliest-dated representative overall (R028)
|
||||
if (clusters.length > 0) {
|
||||
this.selectedRelease = clusters[0].representative;
|
||||
}
|
||||
}
|
||||
|
||||
/* ── Navigation ── */
|
||||
|
||||
private navigateBack() {
|
||||
this.dispatchEvent(
|
||||
new CustomEvent('navigate', {
|
||||
bubbles: true,
|
||||
composed: true,
|
||||
detail: { view: 'explore' },
|
||||
}),
|
||||
);
|
||||
}
|
||||
|
||||
/* ── Image Error Handling ── */
|
||||
|
||||
private handleCoverError(e: Event) {
|
||||
const img = e.target as HTMLImageElement;
|
||||
img.style.display = 'none';
|
||||
const fallback = img.nextElementSibling as HTMLElement | null;
|
||||
if (fallback) {
|
||||
fallback.style.display = 'flex';
|
||||
}
|
||||
}
|
||||
|
||||
/* ── Helpers ── */
|
||||
|
||||
private handleVersionChange(e: Event) {
|
||||
const select = e.target as HTMLSelectElement;
|
||||
const mbid = select.value;
|
||||
for (const cluster of this.clusteredReleases) {
|
||||
if (cluster.representative.mbid === mbid) {
|
||||
this.selectedRelease = cluster.representative;
|
||||
return;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Build a human-readable label for a release in the version selector dropdown.
|
||||
* Includes title, country, date, and optionally track count if editions differ (R027).
|
||||
*/
|
||||
private releaseLabel(release: MBRelease): string {
|
||||
const parts: string[] = [release.title];
|
||||
if (release.country) parts.push(`(${release.country})`);
|
||||
if (release.date) parts.push(`— ${release.date}`);
|
||||
if (this.minTrackCount !== this.maxTrackCount) {
|
||||
const trackCount = (release.tracks ?? []).length;
|
||||
parts.push(`(${trackCount} tracks)`);
|
||||
}
|
||||
return parts.join(' ');
|
||||
}
|
||||
|
||||
/**
|
||||
* Check whether the selected release's tracklist contains any track
|
||||
* with discNumber > 1, indicating a multi-disc release.
|
||||
*/
|
||||
private isMultiDisc(tracks: MBTrack[]): boolean {
|
||||
return tracks.some((t) => (t.discNumber || 1) > 1);
|
||||
}
|
||||
|
||||
/**
|
||||
* Group tracks by disc number, returning them in disc order.
|
||||
*/
|
||||
private groupByDisc(tracks: MBTrack[]): Map<number, MBTrack[]> {
|
||||
const discMap = new Map<number, MBTrack[]>();
|
||||
for (const track of tracks) {
|
||||
const disc = track.discNumber || 1;
|
||||
const bucket = discMap.get(disc);
|
||||
if (bucket) {
|
||||
bucket.push(track);
|
||||
} else {
|
||||
discMap.set(disc, [track]);
|
||||
}
|
||||
}
|
||||
// Sort tracks within each disc by position
|
||||
for (const bucket of discMap.values()) {
|
||||
bucket.sort((a, b) => a.position - b.position);
|
||||
}
|
||||
return discMap;
|
||||
}
|
||||
|
||||
/* ── Render ── */
|
||||
|
||||
override render() {
|
||||
return html`
|
||||
${this.renderHeader()}
|
||||
<div class="content">
|
||||
${this.renderVersionSelector()}
|
||||
${this.renderTracklist()}
|
||||
</div>
|
||||
`;
|
||||
}
|
||||
|
||||
private renderHeader() {
|
||||
const artURL = CoverArtGroupURL(this.releaseGroupMBID);
|
||||
|
||||
return html`
|
||||
<div class="album-header">
|
||||
<button
|
||||
class="back-button"
|
||||
@click=${this.navigateBack}
|
||||
title="Back"
|
||||
aria-label="Back to previous view"
|
||||
>
|
||||
<wa-icon name="arrow-left"></wa-icon>
|
||||
</button>
|
||||
<div class="cover-art-container">
|
||||
<img
|
||||
src="${artURL}"
|
||||
alt="${this.albumName}"
|
||||
@error=${this.handleCoverError}
|
||||
/>
|
||||
<div class="cover-art-fallback" style="display: none">
|
||||
<wa-icon name="compact-disc"></wa-icon>
|
||||
</div>
|
||||
</div>
|
||||
<div class="album-info">
|
||||
<h1 class="album-title" title="${this.albumName}">
|
||||
${this.albumName}
|
||||
</h1>
|
||||
${this.renderAlbumMeta()}
|
||||
</div>
|
||||
</div>
|
||||
`;
|
||||
}
|
||||
|
||||
private renderAlbumMeta() {
|
||||
if (this.loadingInfo) {
|
||||
return html`<span class="album-artist section-loading"
|
||||
>Loading\u2026</span
|
||||
>`;
|
||||
}
|
||||
if (this.errorInfo) {
|
||||
return html`
|
||||
<div class="section-error">
|
||||
<wa-icon name="triangle-exclamation"></wa-icon>
|
||||
${this.errorInfo}
|
||||
</div>
|
||||
`;
|
||||
}
|
||||
if (!this.releaseGroup) return nothing;
|
||||
|
||||
const rg = this.releaseGroup;
|
||||
const artist = rg.artistCredit || '';
|
||||
const year = extractYear(rg.firstReleaseDate);
|
||||
const type = rg.primaryType || '';
|
||||
|
||||
const metaParts: string[] = [];
|
||||
if (type) metaParts.push(type);
|
||||
if (year) metaParts.push(year);
|
||||
|
||||
return html`
|
||||
${artist
|
||||
? html`<div class="album-artist">${artist}</div>`
|
||||
: nothing}
|
||||
${metaParts.length > 0
|
||||
? html`
|
||||
<span class="album-meta">
|
||||
${metaParts.map(
|
||||
(p, i) =>
|
||||
html`${i > 0
|
||||
? html`<span class="meta-separator"
|
||||
>\u00B7</span
|
||||
>`
|
||||
: nothing}${p}`,
|
||||
)}
|
||||
</span>
|
||||
`
|
||||
: nothing}
|
||||
`;
|
||||
}
|
||||
|
||||
/* ── Version Selector (R025, R026, R027) ── */
|
||||
|
||||
private renderVersionSelector() {
|
||||
if (this.loadingReleases) {
|
||||
return html`
|
||||
<section>
|
||||
<h3 class="section-header">Versions</h3>
|
||||
<div class="section-loading">Loading releases\u2026</div>
|
||||
</section>
|
||||
`;
|
||||
}
|
||||
if (this.errorReleases) {
|
||||
return html`
|
||||
<section>
|
||||
<h3 class="section-header">Versions</h3>
|
||||
<div class="section-error">
|
||||
<wa-icon name="triangle-exclamation"></wa-icon>
|
||||
${this.errorReleases}
|
||||
</div>
|
||||
</section>
|
||||
`;
|
||||
}
|
||||
|
||||
// Only show the selector when there are multiple distinct editions
|
||||
if (this.clusteredReleases.length <= 1) return nothing;
|
||||
|
||||
return html`
|
||||
<div class="version-selector">
|
||||
<label for="version-select">Version</label>
|
||||
<select
|
||||
id="version-select"
|
||||
@change=${this.handleVersionChange}
|
||||
aria-label="Select release version"
|
||||
>
|
||||
${this.clusteredReleases.map(
|
||||
(cluster) => html`
|
||||
<option
|
||||
value="${cluster.representative.mbid}"
|
||||
?selected=${this.selectedRelease?.mbid ===
|
||||
cluster.representative.mbid}
|
||||
>
|
||||
${this.releaseLabel(cluster.representative)}
|
||||
</option>
|
||||
`,
|
||||
)}
|
||||
</select>
|
||||
</div>
|
||||
`;
|
||||
}
|
||||
|
||||
/* ── Tracklist ── */
|
||||
|
||||
private renderTracklist() {
|
||||
if (this.loadingReleases) {
|
||||
return html`
|
||||
<section>
|
||||
<h3 class="section-header">Tracklist</h3>
|
||||
<div class="section-loading">Loading tracks\u2026</div>
|
||||
</section>
|
||||
`;
|
||||
}
|
||||
if (this.errorReleases) {
|
||||
// Error already shown in version selector section
|
||||
return nothing;
|
||||
}
|
||||
if (!this.selectedRelease) {
|
||||
return html`
|
||||
<section>
|
||||
<h3 class="section-header">Tracklist</h3>
|
||||
<div class="section-error">
|
||||
<wa-icon name="triangle-exclamation"></wa-icon>
|
||||
No release data available.
|
||||
</div>
|
||||
</section>
|
||||
`;
|
||||
}
|
||||
|
||||
const tracks = this.selectedRelease.tracks ?? [];
|
||||
if (tracks.length === 0) {
|
||||
return html`
|
||||
<section>
|
||||
<h3 class="section-header">Tracklist</h3>
|
||||
<div
|
||||
style="color: var(--yj-text-tertiary, #888); font-size: var(--yj-text-md)"
|
||||
>
|
||||
No tracks available for this release.
|
||||
</div>
|
||||
</section>
|
||||
`;
|
||||
}
|
||||
|
||||
const multiDisc = this.isMultiDisc(tracks);
|
||||
const discMap = this.groupByDisc(tracks);
|
||||
const discNumbers = [...discMap.keys()].sort((a, b) => a - b);
|
||||
|
||||
return html`
|
||||
<section>
|
||||
<h3 class="section-header">Tracklist</h3>
|
||||
<div class="tracklist">
|
||||
${discNumbers.map((discNum) => {
|
||||
const discTracks = discMap.get(discNum) ?? [];
|
||||
return html`
|
||||
${multiDisc
|
||||
? html`
|
||||
<div class="disc-separator">
|
||||
<span class="disc-label"
|
||||
>Disc ${discNum}</span
|
||||
>
|
||||
</div>
|
||||
`
|
||||
: nothing}
|
||||
${discTracks.map(
|
||||
(track) => html`
|
||||
<div class="track-row">
|
||||
<span class="track-position"
|
||||
>${track.position}</span
|
||||
>
|
||||
<span
|
||||
class="track-title"
|
||||
title="${track.title}"
|
||||
>${track.title}</span
|
||||
>
|
||||
<span class="track-duration"
|
||||
>${formatDuration(
|
||||
track.length,
|
||||
)}</span
|
||||
>
|
||||
</div>
|
||||
`,
|
||||
)}
|
||||
`;
|
||||
})}
|
||||
</div>
|
||||
</section>
|
||||
`;
|
||||
}
|
||||
}
|
||||
|
||||
declare global {
|
||||
interface HTMLElementTagNameMap {
|
||||
'explore-album-details': ExploreAlbumDetails;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user