Launch a whole series or a single season, as a watch or lounge party

- lounge parties can now be created from one season (source type
  "season", keeping seriesId/seasonNumber) as well as a whole series
- POST /api/parties accepts a Series id (every season from S1E1) and a
  Season id (that season only); series tiles get a launch button
- whole-series queues skip specials (season 0, sorted first by Emby) -
  pure seriesQueueFrom/seasonQueue in CatalogService, unit-tested, also
  used by the "from this episode" path
- series page: "Lancer toute la série" + "Créer une lounge party" in the
  header, "Lancer cette saison" + "Lounge party de cette saison" above
  the selected season's episodes

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

client/src/types.ts

@@ -181,7 +181,7 @@ export interface LobbyPartyDto {
 export interface StaticPartySummaryDto {
   id: string;
   name: string;
-  sourceType: 'series' | 'playlist';
+  sourceType: 'series' | 'season' | 'playlist';
   imageUrl: string;
   itemCount: number;
   groupWatchedCount: number;

client/src/views/playlist/Playlist.ts

@@ -63,7 +63,7 @@ export async function renderPlaylist(root: HTMLElement, params: RouteParams): Pr
   if (items[0]!.type !== 'Audio') {
     const createStaticBtn = root.querySelector('#createStaticBtn') as HTMLButtonElement;
     createStaticBtn.classList.remove('hide');
-    wireCreateStaticButton(createStaticBtn, playlistId);
+    wireCreateStaticButton(createStaticBtn, () => playlistId);
   }
 
   listEl.innerHTML = items.map((item, i) => {

client/src/views/series/Series.css

@@ -17,7 +17,8 @@
 
 .seriesPoster.noImage { visibility: hidden; }
 
-.seriesActions {
+.seriesActions,
+.seasonActions {
   display: flex;
   flex-wrap: wrap;
   align-items: center;
@@ -25,6 +26,11 @@
   margin-top: 8px;
 }
 
+/* The selected season's own launch buttons, between the tabs and its
+   episodes. */
+.seasonActions { margin: 0 0 16px; }
+.seasonActions button { padding: 8px 14px; font-size: 13px; }
+
 @media (max-width: 600px) {
   .seriesHeader { flex-direction: column; }
   .seriesPoster { width: 120px; }

client/src/views/series/Series.html

@@ -5,10 +5,15 @@
     <h1 id="seriesTitle"></h1>
     <p class="seriesOverview hide" id="seriesOverview"></p>
     <div class="seriesActions">
-      <button id="createStaticBtn">Créer une lounge party</button>
+      <button id="launchSeriesBtn">Lancer toute la série</button>
+      <button class="secondaryBtn" id="createStaticBtn">Créer une lounge party</button>
       <a class="linklike" id="embyLink" target="_blank" rel="noopener">Voir sur Emby</a>
     </div>
   </div>
 </div>
 <nav id="seasonTabs" class="tabs"></nav>
+<div class="seasonActions hide" id="seasonActions">
+  <button id="launchSeasonBtn">Lancer cette saison</button>
+  <button class="secondaryBtn" id="createSeasonStaticBtn">Lounge party de cette saison</button>
+</div>
 <div id="episodeList" class="episodeList"><p class="hint">Chargement...</p></div>

client/src/views/series/Series.ts

@@ -35,13 +35,26 @@ export async function renderSeries(root: HTMLElement, params: RouteParams): Prom
     overviewEl.classList.remove('hide');
   }
   (root.querySelector('#embyLink') as HTMLAnchorElement).href = series.embyUrl;
-  wireCreateStaticButton(root.querySelector('#createStaticBtn') as HTMLButtonElement, seriesId);
+
+  // Whole series: a watch party over every season from S1E1, or a lounge
+  // party over the same (see the server's seriesQueueFrom).
+  wireLaunchButton(root.querySelector('#launchSeriesBtn') as HTMLButtonElement, () => seriesId);
+  wireCreateStaticButton(root.querySelector('#createStaticBtn') as HTMLButtonElement, () => seriesId);
 
   if (!seasons.length) {
+    (root.querySelector('#launchSeriesBtn') as HTMLButtonElement).disabled = true;
+    (root.querySelector('#createStaticBtn') as HTMLButtonElement).disabled = true;
     root.querySelector('#episodeList')!.innerHTML = '<p class="hint">Aucune saison trouvée.</p>';
     return;
   }
 
+  // Just the selected season - both buttons read whichever tab is active
+  // at click time, so they're wired once rather than per tab switch.
+  let selectedSeasonId = seasons[0]!.id;
+  root.querySelector('#seasonActions')!.classList.remove('hide');
+  wireLaunchButton(root.querySelector('#launchSeasonBtn') as HTMLButtonElement, () => selectedSeasonId);
+  wireCreateStaticButton(root.querySelector('#createSeasonStaticBtn') as HTMLButtonElement, () => selectedSeasonId);
+
   const tabsEl = root.querySelector('#seasonTabs')!;
   tabsEl.innerHTML = seasons
     .map((s, i) => `<button class="tab${i === 0 ? ' active' : ''}" data-season-id="${s.id}">${escapeHtml(s.name)}</button>`)
@@ -52,13 +65,35 @@ export async function renderSeries(root: HTMLElement, params: RouteParams): Prom
       if (tab.classList.contains('active')) return;
       tabsEl.querySelectorAll('.tab').forEach((t) => t.classList.remove('active'));
       tab.classList.add('active');
-      loadEpisodes(root, seriesId, tab.dataset.seasonId as string);
+      selectedSeasonId = tab.dataset.seasonId as string;
+      loadEpisodes(root, seriesId, selectedSeasonId);
     });
   });
 
   loadEpisodes(root, seriesId, seasons[0]!.id);
 }
 
+/**
+ * A button that launches a watch party over whatever `itemId()` returns
+ * at click time - the series (every season) or the selected season (see
+ * the server's POST /api/parties Series/Season branches) - then opens it.
+ */
+function wireLaunchButton(btn: HTMLButtonElement, itemId: () => string): void {
+  const idleLabel = btn.textContent || '';
+  btn.addEventListener('click', () => {
+    btn.disabled = true;
+    btn.textContent = 'Démarrage...';
+    createParty(itemId())
+      .then((party) => navigate(`/party/${party.partyId}`))
+      .catch((err: unknown) => {
+        console.error('[series] launch failed', err);
+        showToast((err as Error).message, { variant: 'error' });
+        btn.disabled = false;
+        btn.textContent = idleLabel;
+      });
+  });
+}
+
 async function loadEpisodes(root: HTMLElement, seriesId: string, seasonId: string): Promise<void> {
   const listEl = root.querySelector('#episodeList')!;
   listEl.innerHTML = LOADING_HINT;

client/src/views/staticParties/StaticParties.ts

@@ -3,6 +3,7 @@ import html from './StaticParties.html';
 import { connectLobby } from '../../api/party';
 import { listStaticParties } from '../../api/staticParty';
 import { escapeHtml } from '../../tiles';
+import { SOURCE_LABELS } from '../staticParty/StaticParty';
 import { LOADING_HINT } from '../../loading';
 import type { StaticPartySummaryDto } from '../../types';
 
@@ -64,7 +65,7 @@ function render(grid: HTMLElement, parties: StaticPartySummaryDto[]): void {
         <img src="${escapeHtml(p.imageUrl)}" alt="" loading="lazy" onerror="this.classList.add('noImage')" />
         <div class="staticCardInfo">
           <strong>${escapeHtml(p.name)}</strong>
-          <span class="hint">${p.sourceType === 'series' ? 'Série' : 'Playlist'} · ${p.groupWatchedCount}/${p.itemCount} vus · ${p.memberCount} membre${p.memberCount > 1 ? 's' : ''}</span>
+          <span class="hint">${SOURCE_LABELS[p.sourceType]} · ${p.groupWatchedCount}/${p.itemCount} vus · ${p.memberCount} membre${p.memberCount > 1 ? 's' : ''}</span>
           <div class="staticCardBar"><div style="width:${percent}%"></div></div>
           ${p.livePartyId
             ? '<span class="staticCardLive">● Séance en cours</span>'

client/src/views/staticParty/StaticParty.ts

@@ -16,6 +16,14 @@ import { LOADING_HINT } from '../../loading';
 import { showToast } from '../../toast';
 import type { StaticPartyDetailDto, StaticPartyItemDto } from '../../types';
 
+/** How each lounge party source is named in the UI - shared with the
+ *  "Lounge parties" tab (views/staticParties). */
+export const SOURCE_LABELS: Record<StaticPartyDetailDto['sourceType'], string> = {
+  series: 'Série',
+  season: 'Saison',
+  playlist: 'Playlist'
+};
+
 /**
  * Route `/static/:id` - one static (persistent) watch party: the group's
  * progress through the whole series/playlist, its members, and - the
@@ -61,7 +69,7 @@ async function reload(root: HTMLElement, staticId: string): Promise<void> {
 function render(root: HTMLElement, detail: StaticPartyDetailDto): void {
   (root.querySelector('#staticCover') as HTMLImageElement).src = detail.imageUrl;
   root.querySelector('#staticTitle')!.textContent = detail.name;
-  const sourceLabel = detail.sourceType === 'series' ? 'Série' : 'Playlist';
+  const sourceLabel = SOURCE_LABELS[detail.sourceType];
   root.querySelector('#staticMeta')!.textContent =
     `${sourceLabel} · ${detail.groupWatchedCount}/${detail.itemCount} vus par le groupe · ${detail.memberCount} membre${detail.memberCount > 1 ? 's' : ''}`;
   const percent = detail.itemCount ? Math.round((detail.groupWatchedCount / detail.itemCount) * 100) : 0;

client/src/views/staticParty/createStaticButton.ts

@@ -3,14 +3,17 @@ import { navigate } from '../../router';
 import { showToast } from '../../toast';
 
 /**
- * "Créer une lounge party" - shared by views/series and
- * views/playlist: creates a static watch party over `sourceId` (a series
- * or a video playlist - the server decides which, and refuses anything
- * else with a message) and opens its page.
+ * "Créer une lounge party" - shared by views/series (whole series, or
+ * the selected season) and views/playlist: creates a lounge party over
+ * the source id (a series, a season or a video playlist - the server
+ * decides which, and refuses anything else with a message) and opens its
+ * page. `sourceId` is read at click time, so a caller whose source can
+ * change (the selected season tab) wires the button only once.
  */
-export function wireCreateStaticButton(btn: HTMLButtonElement, sourceId: string): void {
+export function wireCreateStaticButton(btn: HTMLButtonElement, getSourceId: () => string): void {
   const idleLabel = btn.textContent || '';
   btn.addEventListener('click', () => {
+    const sourceId = getSourceId();
     btn.disabled = true;
     btn.textContent = 'Création...';
     createStaticParty(sourceId)

docs/architecture.md

@@ -851,6 +851,23 @@ player against the new `itemId` on that message. A movie or a
 standalone-started episode just gets a one-item queue, so this is a strict
 superset of the old single-item behavior, not a separate code path.
 
+**Later: a whole series or one season, not just "from this episode".**
+`POST /api/parties` also accepts a `Series` id and a `Season` id, not
+only an episode.
+
+- **Series**: queues every season from S1E1. Specials (season 0) sort
+  first in Emby's list and are left out, so launching the whole series
+  builds the same queue as clicking S1E1. This is the pure
+  `CatalogService.seriesQueueFrom`, which the episode path now uses too.
+- **Season**: queues only that season's episodes
+  (`CatalogService.seasonQueue`).
+- **Where it's launched from**: the series page's "Lancer toute la
+  série" / "Lancer cette saison" buttons. A series tile in a library
+  also gets the normal "Lancer une watch party" button: `Series` joined
+  `WATCH_PARTY_TYPES`.
+- **Lounge parties** take the same two sources (a whole series or one
+  season). See spec/static-watch-party.md.
+
 ### Player: language, subtitles, quality
 
 `GET /api/catalog/item/:id/playback-options` reads `PlaybackInfo`'s

server/src/index.ts

@@ -8,7 +8,7 @@ import { Server as SocketIoServer } from 'socket.io';
 import { DATA_DIR, EMBY_SERVER_URL, PORT } from './config';
 import { Logger } from './Logger';
 import { AuthService, SESSION_COOKIE, SESSION_TTL_MS } from './services/AuthService';
-import { CatalogService, CatalogFetchError, imageUrlFor, splitPlaylistByMediaType } from './services/CatalogService';
+import { CatalogService, CatalogFetchError, imageUrlFor, seasonQueue, seriesQueueFrom, splitPlaylistByMediaType } from './services/CatalogService';
 import { PartyService } from './services/PartyService';
 import { MusicQueueService } from './services/MusicQueueService';
 import { TranscodeService } from './services/TranscodeService';
@@ -356,6 +356,20 @@ app.post('/api/parties', requireSession, asyncRoute(async (req, res) => {
   // resolveMusicTracksForItem). Asked for directly, alongside the same
   // action on the party's own existing queue - see the "queue" route
   // below - both share this resolution.
+  // A whole series - every season, in order, from S1E1 (see
+  // seriesQueueFrom). Launched from the series page's own button or its
+  // library tile; an episode's own button still starts from that episode
+  // (the Episode branch below).
+  if (item.Type === 'Series') {
+    await createPartyFromSeries(res, session, item);
+    return;
+  }
+  // Just one season - the series page's per-season button (see seasonQueue).
+  if (item.Type === 'Season') {
+    await createPartyFromSeason(res, session, item);
+    return;
+  }
+
   if (item.Type === 'MusicAlbum' || item.Type === 'MusicArtist') {
     const tracks = await resolveMusicTracksForItem(session, item);
     createMusicPartyFromTracks(res, session, tracks);
@@ -372,9 +386,8 @@ app.post('/api/parties', requireSession, asyncRoute(async (req, res) => {
   let queue: QueueItem[] | null = null;
   if (mediaType === 'video' && item.Type === 'Episode' && item.SeriesId) {
     const all = await CatalogService.getAllSeriesEpisodesRaw(session, item.SeriesId);
-    const startIndex = all.findIndex((e) => e.Id === itemId);
-    const remaining = startIndex >= 0 ? all.slice(startIndex) : [item];
-    queue = remaining.map(toVideoQueueItem);
+    const remaining = seriesQueueFrom(all, itemId);
+    queue = (remaining.length ? remaining : [item]).map(toVideoQueueItem);
   }
 
   const party = PartyService.create(
@@ -479,6 +492,45 @@ async function createPartyFromPlaylist(res: Response, session: EmbySession, play
   res.json(PartyService.toPublicState(party, session.userId));
 }
 
+/** The "launch the whole series" half of POST /api/parties - a watch
+ *  party queued with every episode of every season (see seriesQueueFrom). */
+async function createPartyFromSeries(res: Response, session: EmbySession, series: EmbyItem): Promise<void> {
+  const episodes = await CatalogService.getAllSeriesEpisodesRaw(session, series.Id);
+  const queue = seriesQueueFrom(episodes).map(toVideoQueueItem);
+  if (!queue.length) {
+    res.status(400).json({ error: "Cette série n'a aucun épisode." });
+    return;
+  }
+  createVideoPartyFromQueue(res, session, queue, `series="${series.Name}"`);
+}
+
+/** The "launch just this season" half of POST /api/parties - only that
+ *  season's episodes, nothing after it (see seasonQueue). */
+async function createPartyFromSeason(res: Response, session: EmbySession, season: EmbyItem): Promise<void> {
+  if (!season.SeriesId) {
+    res.status(400).json({ error: 'Saison introuvable.' });
+    return;
+  }
+  const episodes = await CatalogService.getAllSeriesEpisodesRaw(session, season.SeriesId);
+  const queue = seasonQueue(episodes, season).map(toVideoQueueItem);
+  if (!queue.length) {
+    res.status(400).json({ error: "Cette saison n'a aucun épisode." });
+    return;
+  }
+  createVideoPartyFromQueue(res, session, queue, `season="${season.Name}" series=${season.SeriesId}`);
+}
+
+/** Creates a video watch party playing `queue` in order, hosted by
+ *  `session` - shared by the whole-series and single-season launches. */
+function createVideoPartyFromQueue(res: Response, session: EmbySession, queue: QueueItem[], logContext: string): void {
+  const first = queue[0]!;
+  const party = PartyService.create(session.userId, session.userName, first.itemId, first.itemName, first.itemImageUrl, queue, 'video');
+  PartyService.setMemberEmbyToken(party, session.userId, session.embyToken);
+  Logger.party(`queue launch partyId=${party.id} ${logContext} episodes=${queue.length}`);
+  SocketGateway.broadcastLobby(io);
+  res.json(PartyService.toPublicState(party, session.userId));
+}
+
 /** A raw Emby item known/expected to be music-shaped (Audio, MusicAlbum,
  *  or MusicArtist - the three POST /api/parties and the "queue" route
  *  below ever call this for) resolved into a flat, ordered track list -
@@ -682,12 +734,18 @@ app.delete('/api/parties/:partyId/cast-token', requireSession, (req, res) => {
 // StaticPartyService and spec/static-watch-party.md. Each session is an
 // ordinary live party (PartyService) linked back through party.staticLink.
 
-/** Fetches a static party's source (every episode of the series, or the
- *  playlist's video items) under `session`'s own account - so each item
- *  carries *their* Emby UserData (Played). */
+/** Fetches a static party's source under `session`'s own account - so
+ *  each item carries *their* Emby UserData (Played): the whole series
+ *  from S1E1 (specials left out - see seriesQueueFrom), one season's
+ *  episodes, or a playlist's video items. */
 async function fetchStaticSourceItems(session: EmbySession, source: StaticParty['source']): Promise<EmbyItem[]> {
   if (source.type === 'series') {
-    return CatalogService.getAllSeriesEpisodesRaw(session, source.sourceId);
+    return seriesQueueFrom(await CatalogService.getAllSeriesEpisodesRaw(session, source.sourceId));
+  }
+  if (source.type === 'season') {
+    if (!source.seriesId) return [];
+    const episodes = await CatalogService.getAllSeriesEpisodesRaw(session, source.seriesId);
+    return seasonQueue(episodes, { Id: source.sourceId, IndexNumber: source.seasonNumber });
   }
   const { mediaType, items } = splitPlaylistByMediaType(await CatalogService.getPlaylistItemsRaw(session, source.sourceId));
   return mediaType === 'video' ? items : [];
@@ -743,28 +801,38 @@ app.post('/api/static-parties', requireSession, asyncRoute(async (req, res) => {
   const session = req.embySession!;
   const item = await CatalogService.getRawItem(session, sourceId);
 
-  // An episode stands for its whole series - the natural entry point from
+  // A whole series, one season of it, or a video playlist. An episode
+  // stands for its whole series - the natural entry point from
   // views/series is the series itself, but nothing's lost accepting one.
+  // `sourceItem` is what gives the default name and the artwork: the
+  // series itself for a season (a season's own poster is often missing).
   let source: StaticParty['source'];
   let sourceItem = item;
+  let defaultName = item.Name;
   if (item.Type === 'Series') {
     source = { type: 'series', sourceId: item.Id };
+  } else if (item.Type === 'Season' && item.SeriesId) {
+    source = { type: 'season', sourceId: item.Id, seriesId: item.SeriesId, seasonNumber: item.IndexNumber };
+    sourceItem = await CatalogService.getRawItem(session, item.SeriesId);
+    defaultName = `${sourceItem.Name} - ${item.Name}`;
   } else if (item.Type === 'Episode' && item.SeriesId) {
     source = { type: 'series', sourceId: item.SeriesId };
     sourceItem = await CatalogService.getRawItem(session, item.SeriesId);
+    defaultName = sourceItem.Name;
   } else if (item.Type === 'Playlist') {
     source = { type: 'playlist', sourceId: item.Id };
   } else {
-    res.status(400).json({ error: 'Une lounge party se crée depuis une série ou une playlist vidéo.' });
+    res.status(400).json({ error: 'Une lounge party se crée depuis une série, une saison ou une playlist vidéo.' });
     return;
   }
 
   const raw = await fetchStaticSourceItems(session, source);
   if (!raw.length) {
-    res.status(400).json({ error: source.type === 'playlist' ? 'Cette playlist ne contient aucune vidéo.' : "Cette série n'a aucun épisode." });
+    const emptyMessages = { series: "Cette série n'a aucun épisode.", season: "Cette saison n'a aucun épisode.", playlist: 'Cette playlist ne contient aucune vidéo.' };
+    res.status(400).json({ error: emptyMessages[source.type] });
     return;
   }
-  const name = typeof req.body?.name === 'string' && req.body.name.trim() ? req.body.name.trim() : sourceItem.Name;
+  const name = typeof req.body?.name === 'string' && req.body.name.trim() ? req.body.name.trim() : defaultName;
   const sp = StaticPartyService.create(
     { userId: session.userId, userName: session.userName },
     source, name, imageUrlFor(sourceItem), raw.map(toVideoQueueItem)

server/src/services/CatalogService.ts

@@ -8,10 +8,11 @@ import type { EmbyItem, EmbySession, ItemDto, LibraryDto, MediaType, PlaybackMar
 
 // 'MusicVideo' is Emby's own item type for a musicvideos library's
 // contents (distinct from the generic 'Video', which is home videos).
-// 'Audio' is a music track. Series/Season/MusicArtist/MusicAlbum aren't
-// directly playable - only show "start a party" for things Emby can
-// actually stream. "Voir sur Emby" always works though.
-const WATCH_PARTY_TYPES = new Set(['Movie', 'Episode', 'Video', 'MusicVideo', 'Audio']);
+// 'Audio' is a music track. 'Series' isn't itself streamable, but
+// launching one queues the whole series (see seriesQueueFrom and POST
+// /api/parties). Season/MusicArtist/MusicAlbum get no tile button - their
+// own pages have their own launch actions. "Voir sur Emby" always works.
+const WATCH_PARTY_TYPES = new Set(['Movie', 'Episode', 'Video', 'MusicVideo', 'Audio', 'Series']);
 
 // Emby's /Views can return all sorts of things beyond actual media
 // libraries - boxset collections, live TV, photos, books, a mixed-content
@@ -68,6 +69,36 @@ export function imageUrlFor(item: EmbyItem): string {
   return `/api/catalog/image/${imageItemId}`;
 }
 
+/**
+ * What a watch party queues from a series' full episode list (Emby's own
+ * order, every season - see getAllSeriesEpisodesRaw): everything from
+ * `fromEpisodeId` on, or - when launching the whole series - everything
+ * from its first regular episode on. Specials (season 0) sort first in
+ * Emby's list, so "the whole series" deliberately starts at S1E1, the
+ * same queue clicking S1E1's own button builds. An unknown
+ * `fromEpisodeId` yields an empty list (the caller falls back to the one
+ * item). Pure.
+ */
+export function seriesQueueFrom(episodes: EmbyItem[], fromEpisodeId?: string): EmbyItem[] {
+  if (fromEpisodeId) {
+    const index = episodes.findIndex((e) => e.Id === fromEpisodeId);
+    return index >= 0 ? episodes.slice(index) : [];
+  }
+  const firstRegular = episodes.findIndex((e) => e.ParentIndexNumber !== 0);
+  return firstRegular >= 0 ? episodes.slice(firstRegular) : episodes;
+}
+
+/**
+ * Just one season's episodes, in Emby's order, out of a series' full
+ * episode list - "launch this season". Matched by SeasonId, falling back
+ * to the season number for an episode Emby returned without one. Pure.
+ */
+export function seasonQueue(episodes: EmbyItem[], season: { Id: string; IndexNumber?: number }): EmbyItem[] {
+  return episodes.filter((e) => e.SeasonId
+    ? e.SeasonId === season.Id
+    : season.IndexNumber != null && e.ParentIndexNumber === season.IndexNumber);
+}
+
 export function splitPlaylistByMediaType(items: EmbyItem[]): { mediaType: MediaType; items: EmbyItem[] } {
   if (!items.length) return { mediaType: 'video', items: [] };
   const isMusic = items[0]!.Type === 'Audio';

server/src/types.ts

@@ -173,6 +173,8 @@ export interface EmbyItem {
   Type?: string;
   SeriesId?: string;
   SeriesName?: string;
+  /** An episode's own season - see CatalogService.seasonQueue. */
+  SeasonId?: string;
   ParentIndexNumber?: number;
   IndexNumber?: number;
   RunTimeTicks?: number;
@@ -452,6 +454,10 @@ export interface LobbyPartyDto {
 
 // --- Static (persistent) watch party ------------------------------------------
 
+/** A lounge party's source: a whole series, one season of it, or a
+ *  video playlist. */
+export type StaticPartySourceType = 'series' | 'season' | 'playlist';
+
 /** One member of a static watch party - persisted, independent of any
  *  live connection (unlike PartyMember). */
 export interface StaticPartyMember {
@@ -481,7 +487,10 @@ export interface StaticPartyGroupProgress {
 export interface StaticParty {
   id: string;
   name: string;
-  source: { type: 'series' | 'playlist'; sourceId: string };
+  /** What the items come from. A `season` also records its series
+   *  (`seriesId`) and number (`seasonNumber`) - episodes are fetched per
+   *  series, then filtered (see CatalogService.seasonQueue). */
+  source: { type: StaticPartySourceType; sourceId: string; seriesId?: string; seasonNumber?: number };
   imageUrl: string;
   createdByUserId: string;
   createdUtc: number;
@@ -506,7 +515,7 @@ export interface StaticPartyItemDto extends QueueItem {
 export interface StaticPartySummaryDto {
   id: string;
   name: string;
-  sourceType: 'series' | 'playlist';
+  sourceType: StaticPartySourceType;
   imageUrl: string;
   itemCount: number;
   groupWatchedCount: number;

server/test/catalogService.test.ts

@@ -4,7 +4,7 @@
 import { describe, it } from 'node:test';
 import assert from 'node:assert/strict';
 import type { Request, Response } from 'express';
-import { CatalogService, imageUrlFor, splitPlaylistByMediaType } from '../src/services/CatalogService';
+import { CatalogService, imageUrlFor, seasonQueue, seriesQueueFrom, splitPlaylistByMediaType } from '../src/services/CatalogService';
 import { EmbyClient } from '../src/emby/EmbyClient';
 import type { EmbyItem, EmbySession } from '../src/types';
 
@@ -314,3 +314,34 @@ describe('imageUrlFor', () => {
     assert.equal(imageUrlFor({ Id: 't1', Name: 'Track', Type: 'Audio' }), '/api/catalog/image/t1');
   });
 });
+
+describe('seriesQueueFrom / seasonQueue', () => {
+  const ep = (id: string, season: number, seasonId?: string): EmbyItem => ({ Id: id, Name: id, Type: 'Episode', ParentIndexNumber: season, SeasonId: seasonId });
+  // Emby's own order: specials (season 0) first, then every season in turn.
+  const all = [ep('sp1', 0, 'se0'), ep('s1e1', 1, 'se1'), ep('s1e2', 1, 'se1'), ep('s2e1', 2, 'se2'), ep('s2e2', 2, 'se2')];
+
+  it('the whole series starts at S1E1 - specials sort first and are skipped', () => {
+    assert.deepEqual(seriesQueueFrom(all).map((e) => e.Id), ['s1e1', 's1e2', 's2e1', 's2e2']);
+  });
+
+  it('a series with only specials still queues them', () => {
+    assert.deepEqual(seriesQueueFrom([ep('sp1', 0), ep('sp2', 0)]).map((e) => e.Id), ['sp1', 'sp2']);
+  });
+
+  it('from an episode, queues it and everything after it, across seasons', () => {
+    assert.deepEqual(seriesQueueFrom(all, 's1e2').map((e) => e.Id), ['s1e2', 's2e1', 's2e2']);
+  });
+
+  it('an unknown starting episode yields nothing (the caller falls back to that one item)', () => {
+    assert.deepEqual(seriesQueueFrom(all, 'nope'), []);
+  });
+
+  it('a season queues only its own episodes', () => {
+    assert.deepEqual(seasonQueue(all, { Id: 'se1', IndexNumber: 1 }).map((e) => e.Id), ['s1e1', 's1e2']);
+  });
+
+  it('a season falls back to the season number for episodes without a SeasonId', () => {
+    const noIds = [ep('a', 1), ep('b', 2), ep('c', 2)];
+    assert.deepEqual(seasonQueue(noIds, { Id: 'se2', IndexNumber: 2 }).map((e) => e.Id), ['b', 'c']);
+  });
+});

spec/static-watch-party.md

@@ -79,15 +79,25 @@ des watch parties en cours.
     devient l'hôte.
   - Quitter efface sa propre progression.
   - Seul le créateur peut supprimer la watch party.
-- **Contenus** : séries et playlists vidéo uniquement. Une playlist musicale
-  est refusée.
+- **Contenus** : une série entière, **une seule saison**, ou une playlist
+  vidéo. Une playlist musicale est refusée.
+  - Série entière : tous les épisodes de toutes les saisons à partir de S1E1.
+    Les spéciaux (saison 0) sont exclus : Emby les trie en premier, et une
+    séance commencerait par eux (`CatalogService.seriesQueueFrom`). Les
+    lounge parties créées avant ce changement gardent leurs spéciaux déjà
+    en liste.
+  - Saison : uniquement les épisodes de cette saison
+    (`CatalogService.seasonQueue`, par `SeasonId`, sinon par numéro de
+    saison). La source garde `seriesId` et `seasonNumber`, car les
+    épisodes sont récupérés par série puis filtrés. Nom par défaut :
+    « Série - Saison », avec l'affiche de la série.
 
 ## API (`server/src/index.ts`)
 
 | Méthode | Route | Rôle |
 |---|---|---|
 | GET | `/api/static-parties` | liste, avec le nombre de manqués de l'utilisateur et la séance en cours |
-| POST | `/api/static-parties` | `{sourceId, name?}` : série, épisode (sa série) ou playlist |
+| POST | `/api/static-parties` | `{sourceId, name?}` : série, saison, épisode (sa série) ou playlist |
 | GET | `/api/static-parties/:id` | détail : items + état groupe / utilisateur, membres, `missedItemIds` |
 | POST | `/:id/join`, `/:id/leave` | devenir membre / quitter |
 | DELETE | `/:id` | supprimer (créateur uniquement) |
@@ -131,8 +141,12 @@ des watch parties en cours.
     solo, ou lancer une watch party de rattrapage ;
   - les membres ;
   - la liste complète des items.
-- Bouton « Créer une lounge party » sur `views/series` et sur
-  `views/playlist` (vidéo uniquement).
+- Page série (`views/series`) :
+  - en-tête : « Lancer toute la série » (watch party) et « Créer une lounge
+    party » (série entière) ;
+  - au-dessus des épisodes de l'onglet de saison sélectionné : « Lancer
+    cette saison » (watch party) et « Lounge party de cette saison ».
+- « Créer une lounge party » sur `views/playlist` (vidéo uniquement).
 - Onglet dédié « Lounge parties » (sidebar et menu mobile), route
   `/static` (`views/staticParties/`) : une carte par watch party avec la
   progression, le prochain élément, un badge « N manqués » et une pastille