ui: guard join request against double-submit (#62)

lobby/templates/lobby/player_screen.html

@@ -6,6 +6,7 @@
 #answerOptions button.active { border-color: #1652f0; background: #dfe9ff; }
 #guessStatus { margin: 6px 0 10px; font-size: 0.95rem; color: #333; }
 #lieStatus { margin: 6px 0 10px; font-size: 0.95rem; color: #333; }
+#joinStatus { margin: 6px 0 10px; font-size: 0.95rem; color: #333; }
 #lieStatus.locked { color: #0a5f2d; font-weight: 600; }
 #guessStatus.locked { color: #0a5f2d; font-weight: 600; }
 </style>
@@ -14,7 +15,8 @@
 <h1>Player panel (MVP)</h1>
 <input id="code" placeholder="Sessionkode">
 <input id="nickname" placeholder="Nickname">
-<button onclick="joinSession()">1) Join</button>
+<button id="joinBtn" onclick="joinSession()">1) Join</button>
+<p id="joinStatus">Klar til join.</p>
 <input id="playerId" placeholder="Player id">
 <input id="sessionToken" placeholder="Session token" type="password" readonly>
 <input id="roundQuestionId" placeholder="Round question id">
@@ -32,6 +34,7 @@ var availableAnswers=[];
 var guessSubmitted=false;
 var lieSubmitted=false;
 var PLAYER_CONTEXT_KEY="wppPlayerContext";
+var joinInFlight=false;
 function code(){return document.getElementById("code").value.trim().toUpperCase();}
 function pid(){return document.getElementById("playerId").value.trim();}
 function rq(){return document.getElementById("roundQuestionId").value.trim();}
@@ -39,6 +42,8 @@ function savePlayerContext(){try{localStorage.setItem(PLAYER_CONTEXT_KEY,JSON.st
 function loadPlayerContext(){try{var raw=localStorage.getItem(PLAYER_CONTEXT_KEY);if(!raw){return null;}return JSON.parse(raw);}catch(_e){return null;}}
 function restorePlayerContext(){var ctx=loadPlayerContext();if(!ctx){return false;}if(ctx.code){document.getElementById("code").value=(ctx.code||"").toUpperCase();}if(ctx.nickname){document.getElementById("nickname").value=ctx.nickname;}if(ctx.player_id){document.getElementById("playerId").value=ctx.player_id;}if(ctx.session_token){document.getElementById("sessionToken").value=ctx.session_token;}if(ctx.round_question_id){document.getElementById("roundQuestionId").value=ctx.round_question_id;}return !!(ctx.code&&ctx.player_id&&ctx.session_token);}
 function hasSubmitContext(){return !!(code()&&pid()&&rq()&&document.getElementById("sessionToken").value.trim());}
+function updateJoinState(){var btn=document.getElementById("joinBtn");var status=document.getElementById("joinStatus");if(btn){btn.disabled=joinInFlight;}if(!status){return;}if(joinInFlight){status.textContent="Joiner…";return;}if(pid()&&document.getElementById("sessionToken").value.trim()){status.textContent="Join gennemført.";return;}status.textContent="Klar til join.";}
+
 function guessStorageKey(){var c=code();var p=pid();var q=rq();if(!c||!p||!q){return "";}return ["wppGuess",c,p,q].join(":");}
 function lieStorageKey(){var c=code();var p=pid();var q=rq();if(!c||!p||!q){return "";}return ["wppLie",c,p,q].join(":");}
 function persistLieState(text,submitted){var key=lieStorageKey();if(!key){return;}try{localStorage.setItem(key,JSON.stringify({text:text||"",submitted:!!submitted}));}catch(_e){}}
@@ -49,16 +54,18 @@ function persistGuessState(text,submitted){var key=guessStorageKey();if(!key){re
 function loadGuessState(){var key=guessStorageKey();if(!key){return null;}try{var raw=localStorage.getItem(key);if(!raw){return null;}return JSON.parse(raw);}catch(_e){return null;}}
 function updateGuessStatus(){var el=document.getElementById("guessStatus");if(!el){return;}var selected=document.getElementById("guessText").value;var hasContext=hasSubmitContext();if(guessSubmitted){el.textContent="Gæt sendt – valg er låst.";el.classList.add("locked");return;}el.classList.remove("locked");if(!hasContext){el.textContent="Join først for at aktivere gæt.";return;}el.textContent=selected?"Valgt svar klar til afsendelse.":"Vælg et svar.";}
 function updateGuessSubmitState(){var selected=document.getElementById("guessText").value;var hasValid=availableAnswers.indexOf(selected)!==-1;var hasContext=hasSubmitContext();document.getElementById("guessSubmitBtn").disabled=guessSubmitted||!hasValid||!hasContext;var buttons=document.querySelectorAll("#answerOptions button");buttons.forEach(function(btn){btn.disabled=guessSubmitted||!hasContext;});updateGuessStatus();}
-function setGuess(text,submitted){document.getElementById("guessText").value=text||"";if(typeof submitted==="boolean"){guessSubmitted=submitted;}var buttons=document.querySelectorAll("#answerOptions button");buttons.forEach(function(btn){btn.classList.toggle("active",btn.dataset.answer===text);});updateGuessSubmitState();}
+function setGuess(text,submitted){document.getElementById("guessText").value=text||"";if(typeof submitted==="boolean"){guessSubmitted=submitted;}var buttons=document.querySelectorAll("#answerOptions button");buttons.forEach(function(btn){btn.classList.toggle("active",btn.dataset.answer===text);});updateGuessSubmitState();
+updateJoinState();}
 function renderAnswerOptions(roundQuestion){var wrap=document.getElementById("answerOptions");wrap.innerHTML="";availableAnswers=[];guessSubmitted=false;setGuess("",false);lieSubmitted=false;setLieState("",false);if(!roundQuestion||!Array.isArray(roundQuestion.answers)){updateGuessSubmitState();updateLieSubmitState();return;}roundQuestion.answers.forEach(function(item){if(!item||!item.text){return;}availableAnswers.push(item.text);var btn=document.createElement("button");btn.type="button";btn.dataset.answer=item.text;btn.textContent=item.text;btn.onclick=function(){if(guessSubmitted){return;}setGuess(item.text,false);persistGuessState(item.text,false);};wrap.appendChild(btn);});var saved=loadGuessState();if(saved&&availableAnswers.indexOf(saved.selected_text)!==-1){setGuess(saved.selected_text,!!saved.submitted);}updateGuessSubmitState();}
 async function api(path,method,payload){var o={method:method||"GET",headers:{"Accept":"application/json"}};if(payload!==null){o.headers["Content-Type"]="application/json";o.body=JSON.stringify(payload);}var r=await fetch(path,o);var d=await r.json().catch(function(){return {};});document.getElementById("out").textContent=JSON.stringify({status:r.status,data:d},null,2);if(d.player&&d.player.id){document.getElementById("playerId").value=d.player.id;}if(d.player&&d.player.session_token){document.getElementById("sessionToken").value=d.player.session_token;}if(d.round_question&&d.round_question.id){document.getElementById("roundQuestionId").value=d.round_question.id;}if(d.round_question){renderAnswerOptions(d.round_question);var savedLie=loadLieState();if(savedLie){setLieState(savedLie.text||"",!!savedLie.submitted);}}if(d.guess&&d.guess.round_question_id){document.getElementById("roundQuestionId").value=d.guess.round_question_id;setGuess(d.guess.selected_text||"",true);persistGuessState(d.guess.selected_text||"",true);}updateLieSubmitState();updateGuessSubmitState();savePlayerContext();return d;}
-function joinSession(){return api("/lobby/sessions/join","POST",{code:code(),nickname:document.getElementById("nickname").value.trim()});}
+function joinSession(){if(joinInFlight){return Promise.resolve({error:"join_in_flight"});}joinInFlight=true;updateJoinState();return api("/lobby/sessions/join","POST",{code:code(),nickname:document.getElementById("nickname").value.trim()}).then(function(d){joinInFlight=false;if(d&&d.player&&d.player.id){updateJoinState();return d;}updateJoinState();document.getElementById("joinStatus").textContent="Join fejlede – prøv igen.";return d;}).catch(function(err){joinInFlight=false;updateJoinState();document.getElementById("joinStatus").textContent="Join fejlede – prøv igen.";throw err;});}
 function sessionDetail(){return api("/lobby/sessions/"+code(),"GET",null);} 
 function submitLie(){if(lieSubmitted){return Promise.resolve({error:"lie_already_submitted_client"});}if(!hasSubmitContext()){updateLieSubmitState();return Promise.resolve({error:"missing_submit_context"});}var text=(document.getElementById("lieText").value||"").trim();if(!text){updateLieSubmitState();return Promise.resolve({error:"empty_lie_text"});}return api("/lobby/sessions/"+code()+"/questions/"+rq()+"/lies/submit","POST",{player_id:parseInt(pid(),10),session_token:document.getElementById("sessionToken").value,text:text}).then(function(d){if(d&&d.lie&&d.lie.id){lieSubmitted=true;persistLieState(text,true);updateLieSubmitState();}return d;});}
 document.getElementById("lieText").addEventListener("input",function(){if(!lieSubmitted){updateLieSubmitState();persistLieState(document.getElementById("lieText").value,false);}});updateLieSubmitState();
 function submitGuess(){if(!hasSubmitContext()){updateGuessSubmitState();document.getElementById("out").textContent=JSON.stringify({status:400,data:{error:"Join først for at aktivere gæt"}},null,2);return Promise.resolve({error:"missing_submit_context"});}var selected=document.getElementById("guessText").value;if(availableAnswers.indexOf(selected)===-1){document.getElementById("out").textContent=JSON.stringify({status:400,data:{error:"Vælg et af de viste svarmuligheder"}},null,2);return Promise.resolve({error:"invalid_client_guess"});}return api("/lobby/sessions/"+code()+"/questions/"+rq()+"/guesses/submit","POST",{player_id:parseInt(pid(),10),session_token:document.getElementById("sessionToken").value,selected_text:selected});}
-["code","nickname","playerId","sessionToken","roundQuestionId"].forEach(function(fieldId){var field=document.getElementById(fieldId);if(!field){return;}field.addEventListener("input",function(){updateLieSubmitState();updateGuessSubmitState();savePlayerContext();});field.addEventListener("change",function(){updateLieSubmitState();updateGuessSubmitState();savePlayerContext();});});
+["code","nickname","playerId","sessionToken","roundQuestionId"].forEach(function(fieldId){var field=document.getElementById(fieldId);if(!field){return;}field.addEventListener("input",function(){updateLieSubmitState();updateGuessSubmitState();updateJoinState();savePlayerContext();});field.addEventListener("change",function(){updateLieSubmitState();updateGuessSubmitState();updateJoinState();savePlayerContext();});});
 updateGuessSubmitState();
+updateJoinState();
 if(restorePlayerContext()){sessionDetail();}else{savePlayerContext();}
 </script>
 </body></html>