apps/server/src/game/engine.ts

@@ -127,13 +127,26 @@ export class GameEngine implements RoomGameController {
     }
     this.room.status = "in_round"
     this.broadcastState()
-    this.io.to(this.room.code).emit("round:start", {
+    // L'identité du DJ (= contributeur du titre) est privée : seul le DJ la
+    // reçoit, sinon "qui l'a ajouté" deviendrait trivial.
+    const base = {
       type: round.type,
-      djId: this.runtime.djId ?? undefined,
       startsAt: startedAt,
       endsAt,
       payload: start.payload,
+    }
+    const djSocketId = this.runtime.djId
+      ? this.room.players.get(this.runtime.djId)?.socketId
+      : null
+    if (djSocketId) {
+      this.io.to(djSocketId).emit("round:start", {
+        ...base,
+        djId: this.runtime.djId ?? undefined,
       })
+      this.io.to(this.room.code).except(djSocketId).emit("round:start", base)
+    } else {
+      this.io.to(this.room.code).emit("round:start", base)
+    }
 
     // Attend la première condition de fin : timer écoulé OU tous votés.
     await new Promise<void>((resolve) => {
@@ -177,10 +190,11 @@ export class GameEngine implements RoomGameController {
     }
   }
 
-  /** Votants éligibles : tous les joueurs connectés (le DJ inclus). */
+  /** Votants éligibles : joueurs connectés, hors DJ (= contributeur, ne vote pas). */
   private eligibleVoters(): string[] {
+    const djId = this.runtime?.djId
     return [...this.room.players.values()]
-      .filter((p) => p.connected)
+      .filter((p) => p.connected && p.id !== djId)
       .map((p) => p.id)
   }
 

apps/server/src/game/modes/blindtest/blindtest-round.test.ts

@@ -44,19 +44,37 @@ describe("match", () => {
 })
 
 describe("BlindtestRound", () => {
-  test("start tire un DJ neutre (jamais le contributeur)", () => {
+  test("start : le DJ est le contributeur du titre", () => {
     const rooms = new RoomManager()
     const { room, player: a } = rooms.create("Alice", "sa")
-    const { player: b } = rooms.join(room.code, "Bob", "sb")
+    rooms.join(room.code, "Bob", "sb")
     room.blindtestTracks = [track(a.id)]
     prepareBlindtestForRoom(room)
 
     const round = new BlindtestRound()
     const start = round.start(room)
-    expect(start.djId).toBe(b.id) // jamais Alice (contributrice)
+    expect(start.djId).toBe(a.id) // Alice a ajouté le titre → elle est DJ
     expect(start.payload).toEqual({ trackId: "t1", youtubeId: "abc12345678" })
   })
 
+  test("who_added : le contributeur gagne par tromperie (mauvaises devinettes)", () => {
+    const rooms = new RoomManager()
+    const { room, player: a } = rooms.create("Alice", "sa")
+    const { player: b } = rooms.join(room.code, "Bob", "sb")
+    const { player: c } = rooms.join(room.code, "Carol", "sc")
+    const t = track(a.id) // Alice = contributrice/DJ
+    const round = new BlindtestRound()
+    const ctx = ctxFor(room, t, "who_added")
+    round.submitAnswer(ctx, b.id, { guessedPlayerId: c.id }) // faux
+    round.submitAnswer(ctx, c.id, { guessedPlayerId: a.id }) // juste
+    round.submitAnswer(ctx, a.id, { guessedPlayerId: b.id }) // ignoré (contributrice)
+    const deltas = round.score(ctx)
+    // Carol devine juste → 100 ; Alice trompe Bob (1 mauvaise devinette) → 50
+    expect(deltas).toContainEqual({ playerId: c.id, delta: 100 })
+    expect(deltas).toContainEqual({ playerId: a.id, delta: 50 })
+    expect(deltas.find((d) => d.playerId === b.id)).toBeUndefined()
+  })
+
   test("who_added : points si on devine le bon contributeur", () => {
     const rooms = new RoomManager()
     const { room, player: a } = rooms.create("Alice", "sa")

apps/server/src/game/modes/blindtest/blindtest-round.ts

@@ -1,5 +1,6 @@
-// Épreuve Blindtest : un titre = une manche. Un DJ neutre (jamais le
+// Épreuve Blindtest : un titre = une manche. Le contributeur du titre est le DJ
-// contributeur) pilote la lecture ; tout le monde vote à l'aveugle.
+// (il pilote la lecture, son identité reste cachée aux autres). Il ne marque pas
+// de points, SAUF en "qui l'a ajouté" : il gagne quand un joueur le devine mal.
 
 import type {
   Answer,
@@ -18,24 +19,15 @@ import { takeTrack } from "./pool"
 const TITLE_POINTS = 60
 const ARTIST_POINTS = 40
 const WHO_POINTS = 100
+/** Points gagnés par le contributeur pour chaque joueur qui le devine mal. */
+const MISDIRECTION_POINTS = 50
 
 interface BlindtestRoundData {
   track: BlindtestTrack
 }
 
-/** Tire un DJ neutre : un joueur connecté qui n'a pas soumis ce titre. */
+/** Résultat d'un joueur VOTANT (≠ contributeur) selon le mode. */
-function pickDj(room: ServerRoom, submittedBy: string): string | null {
+function voterResult(
-  const eligible = [...room.players.values()].filter(
-    (p) => p.connected && p.id !== submittedBy
-  )
-  if (eligible.length === 0) {
-    return null
-  }
-  return eligible[Math.floor(Math.random() * eligible.length)].id
-}
-
-/** Calcule le résultat d'un vote selon le mode. */
-function resultFor(
   mode: BlindtestMode,
   answer: Answer | undefined,
   track: BlindtestTrack
@@ -68,7 +60,8 @@ export class BlindtestRound implements GameRound {
 
   start(room: ServerRoom): RoundStart {
     const track = takeTrack(room)
-    const djId = track ? pickDj(room, track.submittedBy) : null
+    // Le DJ EST le contributeur : il lance/pilote son propre titre.
+    const djId = track ? track.submittedBy : null
     const payload: BlindtestRoundPayload | null = track
       ? { trackId: track.id, youtubeId: track.youtubeId }
       : null
@@ -76,23 +69,50 @@ export class BlindtestRound implements GameRound {
   }
 
   submitAnswer(ctx: RoundContext, playerId: string, answer: Answer): void {
-    // Premier vote verrouillé (idempotent).
+    const { track } = ctx.data as BlindtestRoundData
-    if (ctx.votes.has(playerId)) {
+    // Le contributeur (DJ) ne vote pas ; premier vote verrouillé pour les autres.
+    if (playerId === track.submittedBy || ctx.votes.has(playerId)) {
       return
     }
     ctx.votes.set(playerId, answer)
   }
 
+  /** Résultat par joueur (votants + bonus de tromperie du contributeur). */
+  private buildResults(ctx: RoundContext): BlindtestPerPlayerResult {
+    const { track } = ctx.data as BlindtestRoundData
+    const mode = ctx.room.settings.blindtestMode
+    const perPlayer: BlindtestPerPlayerResult = {}
+
+    let wrongGuessers = 0
+    for (const player of ctx.room.players.values()) {
+      if (player.id === track.submittedBy) {
+        continue
+      }
+      const result = voterResult(mode, ctx.votes.get(player.id), track)
+      perPlayer[player.id] = result
+      if (
+        (mode === "who_added" || mode === "mixed") &&
+        result.guessedCorrect === false
+      ) {
+        wrongGuessers++
+      }
+    }
+
+    // Contributeur : pas de points hors who_added/mixed ; sinon tromperie.
+    const misdirection =
+      mode === "who_added" || mode === "mixed"
+        ? wrongGuessers * MISDIRECTION_POINTS
+        : 0
+    perPlayer[track.submittedBy] = { points: misdirection }
+
+    return perPlayer
+  }
+
   reveal(ctx: RoundContext): {
     truth: BlindtestRevealTruth
     perPlayerResult: BlindtestPerPlayerResult
   } {
     const { track } = ctx.data as BlindtestRoundData
-    const mode = ctx.room.settings.blindtestMode
-    const perPlayerResult: BlindtestPerPlayerResult = {}
-    for (const player of ctx.room.players.values()) {
-      perPlayerResult[player.id] = resultFor(mode, ctx.votes.get(player.id), track)
-    }
     const submitter = ctx.room.players.get(track.submittedBy)
     return {
       truth: {
@@ -102,22 +122,16 @@ export class BlindtestRound implements GameRound {
         submittedBy: track.submittedBy,
         submittedByName: submitter?.name ?? "?",
       },
-      perPlayerResult,
+      perPlayerResult: this.buildResults(ctx),
     }
   }
 
   score(ctx: RoundContext): ScoreDelta[] {
-    const { track } = ctx.data as BlindtestRoundData
+    const perPlayer = this.buildResults(ctx)
-    const mode = ctx.room.settings.blindtestMode
     const deltas: ScoreDelta[] = []
-    for (const [playerId, answer] of ctx.votes) {
+    for (const [playerId, result] of Object.entries(perPlayer)) {
-      // Le contributeur ne marque pas sur son propre titre.
+      if (result.points > 0) {
-      if (playerId === track.submittedBy) {
+        deltas.push({ playerId, delta: result.points })
-        continue
-      }
-      const { points } = resultFor(mode, answer, track)
-      if (points > 0) {
-        deltas.push({ playerId, delta: points })
       }
     }
     return deltas

apps/server/src/handlers.ts

@@ -128,6 +128,18 @@ export function registerRoomHandlers(
       })
       return
     }
+    const hasBlindtest = room.settings.rounds.some((r) => r.type === "blindtest")
+    const connected = [...room.players.values()].filter((p) => p.connected).length
+    if (hasBlindtest && connected < 3) {
+      ack({
+        ok: false,
+        error: {
+          code: "NEED_THREE",
+          message: "Le blindtest nécessite au moins 3 joueurs.",
+        },
+      })
+      return
+    }
     ack({ ok: true, data: null })
     // Précharge le contenu (pool quiz depuis la DB), puis lance la boucle.
     // Fire-and-forget : la boucle de jeu broadcast son propre état.

apps/web/src/components/blindtest-view.tsx

@@ -11,13 +11,19 @@ import type {
 } from "@nerdware/shared"
 import { Button } from "@workspace/ui/components/button"
 import { useRoomStore } from "@/store/room"
-import { useYoutube } from "@/lib/youtube"
+import { useYoutube, type YoutubeApi } from "@/lib/youtube"
 import { Countdown } from "@/components/countdown"
 import { Avatar } from "@/components/avatar"
 
 const inputClass =
   "border-input bg-background h-10 w-full rounded-md border px-3 py-2 text-sm focus-visible:ring-ring focus-visible:ring-2 focus-visible:outline-none disabled:opacity-50"
 
+function fmt(s: number): string {
+  const m = Math.floor(s / 60)
+  const sec = Math.floor(s % 60)
+  return `${m}:${sec.toString().padStart(2, "0")}`
+}
+
 export function BlindtestView({ snapshot }: { snapshot: RoomSnapshot }) {
   const round = useRoomStore((s) => s.round)
   const reveal = useRoomStore((s) => s.reveal)
@@ -58,19 +64,6 @@ export function BlindtestView({ snapshot }: { snapshot: RoomSnapshot }) {
     }
   }, [showReveal, ready, api])
 
-  function djPlay() {
-    api.play()
-    mediaControl("play", api.time())
-  }
-  function djPause() {
-    api.pause()
-    mediaControl("pause", api.time())
-  }
-  function djRestart() {
-    api.seek(0)
-    mediaControl("seek", 0)
-  }
-
   return (
     <div className="flex w-full max-w-md flex-col gap-5">
       <header className="flex items-center justify-between">
@@ -86,9 +79,13 @@ export function BlindtestView({ snapshot }: { snapshot: RoomSnapshot }) {
         )}
       </header>
 
-      {/* Pochette : le lecteur YouTube est caché derrière (son seulement). */}
+      {/* Cadre 16:9 : le lecteur YouTube est caché derrière le disque pendant la
-      <div className="relative mx-auto aspect-square w-48 overflow-hidden rounded-2xl">
+          manche (son seulement), puis révélé (bannière visible) au reveal. */}
-        <div ref={hostRef} className="absolute inset-0" />
+      <div className="bg-card relative aspect-video w-full overflow-hidden rounded-2xl">
+        <div
+          ref={hostRef}
+          className="absolute inset-0 [&>iframe]:absolute [&>iframe]:inset-0 [&>iframe]:size-full"
+        />
         {!showReveal && (
           <div className="bg-card absolute inset-0 flex items-center justify-center">
             <motion.div
@@ -102,25 +99,10 @@ export function BlindtestView({ snapshot }: { snapshot: RoomSnapshot }) {
       </div>
 
       {isDj && !showReveal && (
-        <div className="flex flex-col items-center gap-2">
+        <DjControls ready={ready} api={api} mediaControl={mediaControl} />
-          <span className="text-muted-foreground text-xs uppercase">
-            Tu es le DJ 🎧
-          </span>
-          <div className="flex gap-2">
-            <Button size="sm" disabled={!ready} onClick={djPlay}>
-              <Play /> Play
-            </Button>
-            <Button size="sm" variant="secondary" disabled={!ready} onClick={djPause}>
-              <Pause /> Pause
-            </Button>
-            <Button size="sm" variant="secondary" disabled={!ready} onClick={djRestart}>
-              <Rewind /> Début
-            </Button>
-          </div>
-        </div>
       )}
 
-      {!showReveal && (
+      {!isDj && !showReveal && (
         <VoteForm
           mode={snapshot.settings.blindtestMode}
           snapshot={snapshot}
@@ -133,6 +115,7 @@ export function BlindtestView({ snapshot }: { snapshot: RoomSnapshot }) {
       {showReveal && truth && (
         <RevealCard
           truth={truth}
+          isDj={isDj}
           result={
             (reveal?.perPlayerResult as BlindtestPerPlayerResult)[playerId ?? ""]
           }
@@ -142,6 +125,92 @@ export function BlindtestView({ snapshot }: { snapshot: RoomSnapshot }) {
   )
 }
 
+function DjControls({
+  ready,
+  api,
+  mediaControl,
+}: {
+  ready: boolean
+  api: YoutubeApi
+  mediaControl: (action: "play" | "pause" | "seek", positionSec: number) => void
+}) {
+  const [pos, setPos] = useState(0)
+  const [dur, setDur] = useState(0)
+
+  useEffect(() => {
+    if (!ready) {
+      return
+    }
+    const id = setInterval(() => {
+      setPos(api.time())
+      setDur(api.duration())
+    }, 400)
+    return () => clearInterval(id)
+  }, [ready, api])
+
+  return (
+    <div className="flex flex-col gap-3">
+      <span className="text-muted-foreground text-center text-xs uppercase">
+        Tu es le DJ 🎧 — c'est ton titre, fais-le deviner 🤫
+      </span>
+      <div className="flex justify-center gap-2">
+        <Button
+          size="sm"
+          disabled={!ready}
+          onClick={() => {
+            api.play()
+            mediaControl("play", api.time())
+          }}
+        >
+          <Play /> Play
+        </Button>
+        <Button
+          size="sm"
+          variant="secondary"
+          disabled={!ready}
+          onClick={() => {
+            api.pause()
+            mediaControl("pause", api.time())
+          }}
+        >
+          <Pause /> Pause
+        </Button>
+        <Button
+          size="sm"
+          variant="secondary"
+          disabled={!ready}
+          onClick={() => {
+            api.seek(0)
+            setPos(0)
+            mediaControl("seek", 0)
+          }}
+        >
+          <Rewind /> Début
+        </Button>
+      </div>
+      <div className="flex items-center gap-2 text-xs tabular-nums">
+        <span className="text-muted-foreground w-9 text-right">{fmt(pos)}</span>
+        <input
+          type="range"
+          min={0}
+          max={Math.max(dur, 1)}
+          step="any"
+          value={Math.min(pos, dur || 0)}
+          disabled={!ready}
+          onChange={(e) => {
+            const v = Number(e.target.value)
+            setPos(v)
+            api.seek(v)
+            mediaControl("seek", v)
+          }}
+          className="accent-primary flex-1"
+        />
+        <span className="text-muted-foreground w-9">{fmt(dur)}</span>
+      </div>
+    </div>
+  )
+}
+
 function VoteForm({
   mode,
   snapshot,
@@ -238,9 +307,11 @@ function VoteForm({
 
 function RevealCard({
   truth,
+  isDj,
   result,
 }: {
   truth: BlindtestRevealTruth
+  isDj: boolean
   result?: BlindtestPerPlayerResult[string]
 }) {
   return (
@@ -252,11 +323,13 @@ function RevealCard({
         <Avatar seed={truth.submittedByName} className="size-6" />
         <span className="font-medium">{truth.submittedByName}</span>
       </p>
-      {result && (
+      {result && (result.points > 0 || !isDj) && (
         <p
           className={`text-sm font-medium ${result.points > 0 ? "text-green-500" : "text-red-500"}`}
         >
-          {result.points > 0 ? `+${result.points} points 🎉` : "Raté 💥"}
+          {result.points > 0
+            ? `+${result.points} points ${isDj ? "🤫" : "🎉"}`
+            : "Raté 💥"}
         </p>
       )}
     </div>

apps/web/src/components/lobby-view.tsx

@@ -25,6 +25,15 @@ const MODE_LABELS: Record<BlindtestMode, string> = {
 const inputClass =
   "border-input bg-background h-10 w-full rounded-md border px-3 py-2 text-sm focus-visible:ring-ring focus-visible:ring-2 focus-visible:outline-none disabled:opacity-50"
 
+function shuffle<T>(items: T[]): T[] {
+  const arr = [...items]
+  for (let i = arr.length - 1; i > 0; i--) {
+    const j = Math.floor(Math.random() * (i + 1))
+    ;[arr[i], arr[j]] = [arr[j], arr[i]]
+  }
+  return arr
+}
+
 /** Construit la séquence de manches selon le type de partie. */
 function buildRounds(
   gameType: GameType,
@@ -37,21 +46,12 @@ function buildRounds(
   if (gameType === "blindtest") {
     return Array.from({ length: totalTracks }, () => ({ type: "blindtest" }))
   }
-  // Mixte : on alterne quiz / blindtest pour multiplier les changements de mode.
+  // Mixte : ordre mélangé pour qu'on ne sache pas ce qui vient ensuite.
-  const rounds: RoundConfig[] = []
+  const rounds: RoundConfig[] = [
-  let q = quizCount
+    ...Array.from({ length: quizCount }, () => ({ type: "quiz" as const })),
-  let b = totalTracks
+    ...Array.from({ length: totalTracks }, () => ({ type: "blindtest" as const })),
-  while (q > 0 || b > 0) {
+  ]
-    if (q > 0) {
+  return shuffle(rounds)
-      rounds.push({ type: "quiz" })
-      q--
-    }
-    if (b > 0) {
-      rounds.push({ type: "blindtest" })
-      b--
-    }
-  }
-  return rounds
 }
 
 export function LobbyView({ snapshot }: { snapshot: RoomSnapshot }) {
@@ -71,8 +71,13 @@ export function LobbyView({ snapshot }: { snapshot: RoomSnapshot }) {
   const showQuiz = gameType === "quiz" || gameType === "mixed"
   const showBlindtest = gameType === "blindtest" || gameType === "mixed"
 
+  // Le blindtest exige au moins 3 joueurs connectés (DJ + 2 devineurs).
+  const connectedCount = snapshot.players.filter((p) => p.connected).length
+  const blindtestAvailable = connectedCount >= 3
+
   const rounds = buildRounds(gameType, showQuiz ? count : 0, totalTracks)
-  const canStart = rounds.length > 0
+  const canStart =
+    rounds.length > 0 && (!showBlindtest || blindtestAvailable)
 
   async function start() {
     setError(null)
@@ -117,17 +122,29 @@ export function LobbyView({ snapshot }: { snapshot: RoomSnapshot }) {
       </section>
 
       {isHost && (
+        <div className="flex flex-col gap-1">
           <div className="flex gap-2">
-          {GAME_TYPES.map((t) => (
+            {GAME_TYPES.map((t) => {
+              const needsThree = t.value !== "quiz" && !blindtestAvailable
+              return (
                 <Button
                   key={t.value}
                   className="flex-1"
                   variant={gameType === t.value ? "default" : "secondary"}
+                  disabled={needsThree}
+                  title={needsThree ? "Blindtest : 3 joueurs minimum" : undefined}
                   onClick={() => updateSettings({ gameType: t.value })}
                 >
                   {t.label}
                 </Button>
-          ))}
+              )
+            })}
+          </div>
+          {!blindtestAvailable && (
+            <p className="text-muted-foreground text-center text-xs">
+              Le blindtest se débloque à 3 joueurs.
+            </p>
+          )}
         </div>
       )}
 

apps/web/src/lib/youtube.ts

@@ -28,6 +28,7 @@ export interface YoutubeApi {
   pause: () => void
   seek: (seconds: number) => void
   time: () => number
+  duration: () => number
 }
 
 /**
@@ -89,6 +90,7 @@ export function useYoutube(youtubeId: string) {
       pause: () => playerRef.current?.pauseVideo(),
       seek: (seconds) => playerRef.current?.seekTo(seconds, true),
       time: () => playerRef.current?.getCurrentTime() ?? 0,
+      duration: () => playerRef.current?.getDuration() ?? 0,
     }),
     []
   )