v1.0

frontend/Dockerfile

@@ -0,0 +1,12 @@
+FROM node:22-alpine
+
+WORKDIR /app
+
+COPY package.json .
+RUN npm install
+
+COPY . .
+
+EXPOSE 5173
+
+CMD ["npm", "run", "dev"]

frontend/src/main.jsx

@@ -1,23 +1,84 @@
-import React, { useEffect, useMemo, useState } from 'react';
+import React, { useEffect, useMemo, useRef, useState } from 'react';
 import { createRoot } from 'react-dom/client';
 import { io } from 'socket.io-client';
 import './style.css';
 
 const API_URL = import.meta.env.VITE_API_URL || 'http://localhost:5000';
 
+function shuffle(items) {
+  const shuffled = [...items];
+  for (let index = shuffled.length - 1; index > 0; index -= 1) {
+    const swapIndex = Math.floor(Math.random() * (index + 1));
+    [shuffled[index], shuffled[swapIndex]] = [shuffled[swapIndex], shuffled[index]];
+  }
+  return shuffled;
+}
+
 function App() {
-  const [name, setName] = useState('');
+  const [hostName, setHostName] = useState('');
+  const [guestName, setGuestName] = useState('');
   const [code, setCode] = useState('');
+  const [joinStep, setJoinStep] = useState('code');
   const [participantId, setParticipantId] = useState(null);
   const [session, setSession] = useState(null);
   const [match, setMatch] = useState(null);
   const [error, setError] = useState('');
+  const [copyMessage, setCopyMessage] = useState('');
+  const [isLoading, setIsLoading] = useState(false);
+  const [votedRecipeIds, setVotedRecipeIds] = useState([]);
+  const [recipeOrderIds, setRecipeOrderIds] = useState([]);
+  const [drag, setDrag] = useState({ x: 0, y: 0, active: false, leaving: null });
+  const swipeStart = useRef(null);
+  const sessionStatusRef = useRef(null);
+  const votingRoundRef = useRef(null);
+  const SWIPE_THRESHOLD = 110;
 
   const socket = useMemo(() => io(API_URL, { autoConnect: false }), []);
+  const votedRecipeIdSet = useMemo(() => new Set(votedRecipeIds), [votedRecipeIds]);
+  const orderedRecipes = useMemo(() => {
+    if (session?.matchMode !== 'final_round') {
+      return session?.recipes || [];
+    }
+
+    const recipesById = new Map((session?.recipes || []).map((recipe) => [recipe.id, recipe]));
+    const ordered = recipeOrderIds.map((id) => recipesById.get(id)).filter(Boolean);
+    const orderedIdSet = new Set(recipeOrderIds);
+    const missing = (session?.recipes || []).filter((recipe) => !orderedIdSet.has(recipe.id));
+    return [...ordered, ...missing];
+  }, [session, recipeOrderIds]);
+  const currentRecipe = useMemo(
+    () => orderedRecipes.find((recipe) => !votedRecipeIdSet.has(recipe.id)),
+    [orderedRecipes, votedRecipeIdSet],
+  );
+  const matchedRecipe = useMemo(
+    () => session?.recipes?.find((recipe) => recipe.id === session.matchedRecipeId),
+    [session],
+  );
+  const currentUser = useMemo(
+    () => session?.participants?.find((participant) => participant.id === participantId),
+    [session, participantId],
+  );
+  const sessionLink = useMemo(() => {
+    if (!session || typeof window === 'undefined') {
+      return '';
+    }
+
+    return `${window.location.origin}${window.location.pathname}?code=${session.code}`;
+  }, [session]);
 
   useEffect(() => {
     socket.connect();
     socket.on('session:update', (update) => {
+      if (update.status === 'running' && sessionStatusRef.current !== 'running') {
+        setMatch(null);
+        setVotedRecipeIds([]);
+      }
+      if (update.votingRound && update.votingRound !== votingRoundRef.current) {
+        setVotedRecipeIds([]);
+        setRecipeOrderIds([]);
+      }
+      sessionStatusRef.current = update.status;
+      votingRoundRef.current = update.votingRound || null;
       setSession((current) => current ? { ...current, ...update } : update);
     });
     socket.on('session:match', (data) => setMatch(data.recipe));
@@ -25,63 +86,254 @@ function App() {
     return () => socket.disconnect();
   }, [socket]);
 
+  useEffect(() => {
+    const params = new URLSearchParams(window.location.search);
+    const linkedCode = params.get('code');
+    if (linkedCode) {
+      setCode(linkedCode.toUpperCase());
+      setJoinStep('name');
+    }
+  }, []);
+
+  useEffect(() => {
+    if (session?.matchMode !== 'final_round' || !session.recipes?.length) {
+      setRecipeOrderIds([]);
+      return;
+    }
+
+    setRecipeOrderIds((currentOrder) => {
+      const recipeIds = session.recipes.map((recipe) => recipe.id);
+      const recipeIdSet = new Set(recipeIds);
+      const keptOrder = currentOrder.filter((id) => recipeIdSet.has(id));
+      const keptIdSet = new Set(keptOrder);
+      const newIds = recipeIds.filter((id) => !keptIdSet.has(id));
+      return [...keptOrder, ...shuffle(newIds)];
+    });
+  }, [session?.matchMode, session?.votingRound, session?.recipes]);
+
   const subscribe = (sessionCode) => socket.emit('session:subscribe', { code: sessionCode });
 
   async function createSession() {
     setError('');
-    const response = await fetch(`${API_URL}/api/sessions`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ name: name || 'Host' }),
-    });
-    const data = await response.json();
-    setSession(data.session);
-    setParticipantId(data.participantId);
-    setCode(data.session.code);
-    subscribe(data.session.code);
+    setIsLoading(true);
+    try {
+      const response = await fetch(`${API_URL}/api/sessions`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ name: hostName || 'Host' }),
+      });
+      const data = await response.json();
+      if (!response.ok) {
+        setError(data.error || 'Session konnte nicht erstellt werden.');
+        return;
+      }
+      setSession(data.session);
+      setParticipantId(data.participantId);
+      setCode(data.session.code);
+      setVotedRecipeIds([]);
+      subscribe(data.session.code);
+    } catch {
+      setError('Backend nicht erreichbar. Bitte Container prüfen.');
+    } finally {
+      setIsLoading(false);
+    }
   }
 
   async function joinSession() {
     setError('');
-    const response = await fetch(`${API_URL}/api/sessions/${code}/join`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ name: name || 'Gast' }),
-    });
-    const data = await response.json();
-    if (!response.ok) {
-      setError(data.error || 'Beitritt fehlgeschlagen.');
+    setIsLoading(true);
+    try {
+      const response = await fetch(`${API_URL}/api/sessions/${code}/join`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ name: guestName || 'Gast' }),
+      });
+      const data = await response.json();
+      if (!response.ok) {
+        setError(data.error || 'Beitritt fehlgeschlagen.');
+        return;
+      }
+      setSession(data.session);
+      setParticipantId(data.participantId);
+      setVotedRecipeIds([]);
+      subscribe(data.session.code);
+    } catch {
+      setError('Backend nicht erreichbar. Bitte Container prüfen.');
+    } finally {
+      setIsLoading(false);
+    }
+  }
+
+  function continueToGuestName() {
+    const trimmedCode = code.trim().toUpperCase();
+    if (!trimmedCode) {
+      setError('Bitte gib zuerst den Session-Code ein.');
       return;
     }
-    setSession(data.session);
-    setParticipantId(data.participantId);
-    subscribe(data.session.code);
+
+    setError('');
+    setCode(trimmedCode);
+    setJoinStep('name');
+  }
+
+  async function copyToClipboard(text, message) {
+    try {
+      await navigator.clipboard.writeText(text);
+      setCopyMessage(message);
+      window.setTimeout(() => setCopyMessage(''), 1800);
+    } catch {
+      setCopyMessage('Kopieren fehlgeschlagen.');
+    }
   }
 
   function startSession() {
     socket.emit('session:start', { code: session.code, participantId });
   }
 
-  function sendVote(vote) {
-    const recipe = session.recipes[session.currentRecipeIndex];
+  function restartSession() {
+    socket.emit('session:restart', { code: session.code, participantId });
+  }
+
+  function updateRequiredLikes(value) {
+    socket.emit('session:set_required_likes', {
+      code: session.code,
+      participantId,
+      requiredLikes: Number(value),
+    });
+  }
+
+  function updateMatchMode(value) {
+    socket.emit('session:set_match_mode', {
+      code: session.code,
+      participantId,
+      matchMode: value,
+    });
+  }
+
+  function goHome() {
+    window.history.replaceState({}, '', window.location.pathname);
+    setHostName('');
+    setGuestName('');
+    setCode('');
+    setJoinStep('code');
+    setParticipantId(null);
+    setSession(null);
+    sessionStatusRef.current = null;
+    votingRoundRef.current = null;
+    setMatch(null);
+    setError('');
+    setCopyMessage('');
+    setVotedRecipeIds([]);
+    setRecipeOrderIds([]);
+  }
+
+  function sendVote(vote, recipe = currentRecipe) {
+    if (!recipe || votedRecipeIdSet.has(recipe.id)) {
+      return;
+    }
+
+    setVotedRecipeIds((current) => [...current, recipe.id]);
     socket.emit('vote', { code: session.code, participantId, recipeId: recipe.id, vote });
   }
 
+  function voteWithAnimation(vote) {
+    if (!currentRecipe || drag.leaving) {
+      return;
+    }
+
+    const direction = vote === 'yes' ? 1 : -1;
+    setDrag({ x: direction * 520, y: 20, active: false, leaving: vote });
+    window.setTimeout(() => {
+      sendVote(vote);
+      setDrag({ x: 0, y: 0, active: false, leaving: null });
+    }, 180);
+  }
+
+  function handleSwipeStart(event) {
+    if (event.target.closest('button, a, input, select')) {
+      return;
+    }
+
+    if (drag.leaving) {
+      return;
+    }
+
+    event.currentTarget.setPointerCapture(event.pointerId);
+    swipeStart.current = { x: event.clientX, y: event.clientY };
+    setDrag((current) => ({ ...current, active: true }));
+  }
+
+  function handleSwipeMove(event) {
+    if (!swipeStart.current || drag.leaving) {
+      return;
+    }
+
+    setDrag({
+      x: event.clientX - swipeStart.current.x,
+      y: event.clientY - swipeStart.current.y,
+      active: true,
+      leaving: null,
+    });
+  }
+
+  function handleSwipeEnd(event) {
+    if (!swipeStart.current || drag.leaving) {
+      return;
+    }
+
+    if (event.currentTarget.hasPointerCapture(event.pointerId)) {
+      event.currentTarget.releasePointerCapture(event.pointerId);
+    }
+
+    const distance = event.clientX - swipeStart.current.x;
+    swipeStart.current = null;
+
+    if (Math.abs(distance) < SWIPE_THRESHOLD) {
+      setDrag({ x: 0, y: 0, active: false, leaving: null });
+      return;
+    }
+
+    voteWithAnimation(distance > 0 ? 'yes' : 'no');
+  }
+
   if (match) {
-    return <Result recipe={match} />;
+    return <Result recipe={match} isHost={currentUser?.isHost} onHome={goHome} onRestart={restartSession} />;
+  }
+
+  if (session?.status === 'finished') {
+    return <Result recipe={matchedRecipe || null} isHost={currentUser?.isHost} onHome={goHome} onRestart={restartSession} />;
   }
 
   if (!session) {
+    if (joinStep === 'name') {
+      return (
+        <main className="page">
+          <section className="card">
+            <h1>Session beitreten</h1>
+            <p className="join-code">Session {code}</p>
+            <input placeholder="Dein Name" value={guestName} onChange={(e) => setGuestName(e.target.value)} />
+            <button onClick={joinSession} disabled={isLoading}>
+              {isLoading ? 'Bitte warten...' : 'Beitreten'}
+            </button>
+            <button className="secondary" onClick={() => setJoinStep('code')} disabled={isLoading}>Code ändern</button>
+            {error && <p className="error">{error}</p>}
+          </section>
+        </main>
+      );
+    }
+
     return (
       <main className="page">
         <section className="card">
           <h1>Rezept Finder</h1>
           <p>Findet gemeinsam heraus, was ihr heute essen wollt.</p>
-          <input placeholder="Dein Name" value={name} onChange={(e) => setName(e.target.value)} />
-          <button onClick={createSession}>Session erstellen</button>
+          <input placeholder="Host-Name" value={hostName} onChange={(e) => setHostName(e.target.value)} />
+          <button onClick={createSession} disabled={isLoading}>
+            {isLoading ? 'Bitte warten...' : 'Session erstellen'}
+          </button>
           <div className="divider">oder</div>
           <input placeholder="Session-Code" value={code} onChange={(e) => setCode(e.target.value.toUpperCase())} />
-          <button onClick={joinSession}>Session beitreten</button>
+          <button onClick={continueToGuestName} disabled={isLoading}>Weiter</button>
           {error && <p className="error">{error}</p>}
         </section>
       </main>
@@ -89,14 +341,50 @@ function App() {
   }
 
   if (session.status === 'waiting') {
-    const currentUser = session.participants?.find((p) => p.id === participantId);
+    const participantCount = Math.max(2, session.participants?.length || 1);
+    const requiredLikes = Math.min(session.requiredLikes || participantCount, participantCount);
+
     return (
       <main className="page">
         <section className="card">
           <h1>Lobby</h1>
-          <p className="code">{session.code}</p>
+          <button className="code code-button" onClick={() => copyToClipboard(session.code, 'Code kopiert')}>
+            {session.code}
+          </button>
+          {currentUser?.isHost && (
+            <button className="secondary" onClick={() => copyToClipboard(sessionLink, 'Link kopiert')}>
+              Einladungslink kopieren
+            </button>
+          )}
+          {copyMessage && <p className="copy-message">{copyMessage}</p>}
           <h2>Teilnehmer</h2>
           <ul>{session.participants?.map((p) => <li key={p.id}>{p.name}{p.isHost ? ' 👑' : ''}</li>)}</ul>
+          <div className="setting">
+            <label htmlFor="match-mode">Modus</label>
+            {currentUser?.isHost ? (
+              <select id="match-mode" value={session.matchMode || 'first_match'} onChange={(event) => updateMatchMode(event.target.value)}>
+                <option value="first_match">Erstes Match gewinnt</option>
+                <option value="final_round">Finalrunde aus Favoriten</option>
+              </select>
+            ) : (
+              <p>{session.matchMode === 'final_round' ? 'Finalrunde aus Favoriten' : 'Erstes Match gewinnt'}</p>
+            )}
+          </div>
+          <div className="setting">
+            <label htmlFor="required-likes">Likes bis Match</label>
+            {currentUser?.isHost ? (
+              <input
+                id="required-likes"
+                type="number"
+                min="2"
+                max={participantCount}
+                value={requiredLikes}
+                onChange={(event) => updateRequiredLikes(event.target.value)}
+              />
+            ) : (
+              <p>{requiredLikes} von {participantCount}</p>
+            )}
+          </div>
           {currentUser?.isHost && <button onClick={startSession}>Session starten</button>}
           {!currentUser?.isHost && <p>Warten auf Host…</p>}
           {error && <p className="error">{error}</p>}
@@ -105,42 +393,79 @@ function App() {
     );
   }
 
-  const recipe = session.recipes?.[session.currentRecipeIndex];
-  if (!recipe) {
-    return <Result recipe={null} />;
+  if (!currentRecipe) {
+    return (
+      <main className="page">
+        <section className="card">
+          <h1>{session.matchMode === 'final_round' ? 'Warten auf die Runde' : 'Neue Rezepte laden'}</h1>
+          <p>{session.matchMode === 'final_round' ? 'Sobald alle fertig sind, geht es weiter.' : 'Der nächste Schwung Vorschläge ist gleich da.'}</p>
+          {error && <p className="error">{error}</p>}
+        </section>
+      </main>
+    );
   }
 
   return (
     <main className="page">
-      <section className="recipe-card">
-        <p className="counter">{session.currentRecipeIndex + 1} / {session.recipes.length}</p>
-        <div className="image-placeholder">🍽️</div>
-        <h1>{recipe.title}</h1>
-        <p>{recipe.meta}</p>
+      <section
+        className={`recipe-card ${drag.active ? 'is-dragging' : ''}`}
+        onPointerDown={handleSwipeStart}
+        onPointerMove={handleSwipeMove}
+        onPointerUp={handleSwipeEnd}
+        onPointerCancel={() => {
+          swipeStart.current = null;
+          setDrag({ x: 0, y: 0, active: false, leaving: null });
+        }}
+        style={{
+          '--swipe-x': `${drag.x}px`,
+          '--swipe-y': `${drag.y}px`,
+          '--swipe-rotation': `${drag.x / 18}deg`,
+          '--yes-opacity': Math.max(0, Math.min(1, drag.x / SWIPE_THRESHOLD)),
+          '--no-opacity': Math.max(0, Math.min(1, -drag.x / SWIPE_THRESHOLD)),
+        }}
+      >
+        <div className="swipe-badge swipe-badge-yes">Ja</div>
+        <div className="swipe-badge swipe-badge-no">Nein</div>
+        <p className="counter">
+          {session.matchMode === 'final_round' && session.votingRound === 2 ? 'Finalrunde · ' : ''}
+          {votedRecipeIds.length + 1} / {session.recipes.length}
+        </p>
+        {currentRecipe.imageUrl ? (
+          <img className="recipe-image" src={currentRecipe.imageUrl} alt={currentRecipe.title} />
+        ) : (
+          <div className="image-placeholder">🍽️</div>
+        )}
+        <h1>{currentRecipe.title}</h1>
+        <p>{currentRecipe.meta}</p>
         <div className="actions">
-          <button className="no" onClick={() => sendVote('no')}>Nein</button>
-          <button className="yes" onClick={() => sendVote('yes')}>Ja</button>
+          <button className="no" onPointerDown={(event) => event.stopPropagation()} onClick={() => voteWithAnimation('no')}>Nein</button>
+          <button className="yes" onPointerDown={(event) => event.stopPropagation()} onClick={() => voteWithAnimation('yes')}>Ja</button>
         </div>
       </section>
     </main>
   );
 }
 
-function Result({ recipe }) {
+function Result({ recipe, isHost, onHome, onRestart }) {
   return (
     <main className="page">
       <section className="card">
         {recipe ? (
           <>
             <h1>🎉 Match gefunden</h1>
+            {recipe.imageUrl && <img className="recipe-image" src={recipe.imageUrl} alt={recipe.title} />}
             <h2>{recipe.title}</h2>
             <p>{recipe.meta}</p>
             <a className="button" href={recipe.url} target="_blank" rel="noreferrer">Zum Rezept</a>
+            {isHost && <button onClick={onRestart}>Session neu starten</button>}
+            <button className="secondary" onClick={onHome}>Zurück zur Startseite</button>
           </>
         ) : (
           <>
             <h1>Kein Match</h1>
             <p>Bei den aktuellen Vorschlägen war nichts für alle dabei.</p>
+            {isHost && <button onClick={onRestart}>Session neu starten</button>}
+            <button className="secondary" onClick={onHome}>Zurück zur Startseite</button>
           </>
         )}
       </section>

frontend/src/style.css

@@ -1,17 +1,31 @@
 * { box-sizing: border-box; }
 body { margin: 0; font-family: system-ui, sans-serif; background: #fff7ed; color: #1f2937; }
-.page { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
+.page { min-height: 100vh; display: grid; place-items: center; padding: 24px; overflow: hidden; }
 .card, .recipe-card { width: min(460px, 100%); background: white; border-radius: 28px; padding: 28px; box-shadow: 0 20px 50px rgba(0,0,0,.12); }
 h1 { margin-top: 0; }
-input { width: 100%; padding: 14px 16px; border: 1px solid #e5e7eb; border-radius: 14px; margin: 8px 0; font-size: 16px; }
+input, select { width: 100%; padding: 14px 16px; border: 1px solid #e5e7eb; border-radius: 14px; margin: 8px 0; font-size: 16px; background: white; }
+label { display: block; font-weight: 700; margin-bottom: 6px; }
 button, .button { width: 100%; border: 0; border-radius: 14px; padding: 14px 18px; font-weight: 700; font-size: 16px; cursor: pointer; background: #f97316; color: white; text-decoration: none; display: inline-block; text-align: center; margin-top: 10px; }
+button:disabled { cursor: wait; opacity: .7; }
+button.secondary { background: #e5e7eb; color: #1f2937; }
 .divider { text-align: center; margin: 18px 0; color: #6b7280; }
 .code { font-size: 36px; letter-spacing: 8px; font-weight: 800; text-align: center; background: #f3f4f6; border-radius: 16px; padding: 16px; }
+.code-button { color: #1f2937; margin: 0 0 10px; }
+.join-code, .copy-message { text-align: center; color: #6b7280; }
+.setting { margin: 18px 0; padding: 14px; border-radius: 14px; background: #f9fafb; }
+.setting p { margin: 0; color: #6b7280; }
+.setting input { margin: 0; }
 ul { padding-left: 20px; }
 .error { color: #dc2626; }
-.recipe-card { text-align: center; }
+.recipe-card { text-align: center; touch-action: pan-y; user-select: none; cursor: grab; position: relative; transform: translate3d(var(--swipe-x, 0), var(--swipe-y, 0), 0) rotate(var(--swipe-rotation, 0deg)); transition: transform 180ms ease, box-shadow 180ms ease; will-change: transform; }
+.recipe-card:active { cursor: grabbing; }
+.recipe-card.is-dragging { transition: none; box-shadow: 0 26px 60px rgba(0,0,0,.18); }
+.swipe-badge { position: absolute; top: 34px; z-index: 2; padding: 10px 14px; border: 4px solid currentColor; border-radius: 10px; background: rgba(255,255,255,.82); font-size: 28px; font-weight: 900; text-transform: uppercase; pointer-events: none; }
+.swipe-badge-yes { right: 24px; color: #16a34a; opacity: var(--yes-opacity, 0); transform: rotate(14deg); }
+.swipe-badge-no { left: 24px; color: #dc2626; opacity: var(--no-opacity, 0); transform: rotate(-14deg); }
 .counter { color: #6b7280; }
 .image-placeholder { height: 220px; border-radius: 22px; background: #fed7aa; display: grid; place-items: center; font-size: 72px; margin-bottom: 20px; }
+.recipe-image { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: 22px; margin-bottom: 20px; background: #fed7aa; display: block; }
 .actions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
 .actions button { margin-top: 0; }
 .no { background: #ef4444; }