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<template>
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<main class="take-page exam-page" v-loading="loading">
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<header class="take-head"><div class="head-title"><h1>{{ paper.name }}</h1><p>考试结束时间 {{ formatTime(paper.endTime) }}</p></div><div class="timer" :class="{ urgent: remaining < 300 }"><el-icon><Timer /></el-icon><span>剩余时间</span><strong>{{ timerText }}</strong></div></header>
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<div class="exam-body">
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<aside class="answer-sheet"><h2>答题卡</h2><div v-for="group in grouped" :key="group.type" class="sheet-group"><h3>{{ typeName[group.type] }}</h3><div><button v-for="question in group.items" :key="question.id" :class="{current:current?.id===question.id,answered:isAnswered(question)}" @click="select(question.id)">{{ question.order }}</button></div></div><footer><span><i class="answered-dot" />已答</span><span><i />未答</span></footer></aside>
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<section v-if="current" class="question-panel">
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<header><span>{{ typeName[current.type] }}</span><b>{{ current.score }} 分</b></header><h2>{{ current.order }}. {{ current.stem }}</h2>
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<a v-if="current.attachmentUrl" :href="current.attachmentUrl" target="_blank" class="material"><el-icon><Download /></el-icon>下载题目资料 {{ current.attachmentName }}</a>
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<el-radio-group v-if="current.type==='SINGLE'" v-model="answers[current.id]" class="choice-list" @change="persist(current)"><el-radio v-for="option in current.options" :key="option.label" :label="option.label"><b>{{ option.label }}</b>{{ option.content }}</el-radio></el-radio-group>
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<el-checkbox-group v-else-if="current.type==='MULTIPLE'" v-model="answers[current.id]" class="choice-list" @change="persist(current)"><el-checkbox v-for="option in current.options" :key="option.label" :label="option.label"><b>{{ option.label }}</b>{{ option.content }}</el-checkbox></el-checkbox-group>
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<el-radio-group v-else-if="current.type==='TRUE_FALSE'" v-model="answers[current.id]" class="choice-list judgement" @change="persist(current)"><el-radio :label="true"><b>✓</b>正确</el-radio><el-radio :label="false"><b>×</b>错误</el-radio></el-radio-group>
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<template v-else><el-input v-model="answers[current.id]" type="textarea" :rows="10" placeholder="请输入答案" @blur="persist(current)" /><div class="file-answer"><el-upload :show-file-list="false" :http-request="uploadAnswer" accept=".pdf,.doc,.docx,.png,.jpg,.jpeg"><el-button type="primary" :icon="Upload">上传作答文件</el-button></el-upload><span v-if="files[current.id]">{{ files[current.id].name }}</span></div></template>
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</section>
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</div>
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<footer v-if="paper.questions?.length" class="exam-actions"><button class="exam-outline-action" :disabled="currentIndex===0" @click="move(-1)"><el-icon><ArrowLeft /></el-icon>上一题</button><button class="exam-primary-action" :disabled="currentIndex===paper.questions.length-1" @click="move(1)">下一题<el-icon><ArrowRight /></el-icon></button></footer>
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<div v-if="paper.questions?.length" class="exam-submit"><button class="exam-submit-action" @click="confirmSubmit">交卷</button></div>
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</main>
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</template>
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<script setup>
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import { computed,onBeforeUnmount,onMounted,reactive,ref } from "vue";import { useRoute,useRouter } from "vue-router";import { ElMessage,ElMessageBox } from "element-plus";import { ArrowLeft,ArrowRight,Download,Timer,Upload } from "@element-plus/icons-vue";import * as examApi from "@/api/exam";
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const route=useRoute(),router=useRouter(),examId=route.params.id;const loading=ref(false),paper=ref({questions:[]}),currentId=ref(null),remaining=ref(0);const answers=reactive({}),files=reactive({});let ticker;
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const typeName={SINGLE:"单选题",MULTIPLE:"多选题",TRUE_FALSE:"判断题",SHORT_ANSWER:"简答题"};const current=computed(()=>paper.value.questions.find(q=>q.id===currentId.value));const currentIndex=computed(()=>paper.value.questions.findIndex(q=>q.id===currentId.value));const grouped=computed(()=>Object.keys(typeName).map(type=>({type,items:paper.value.questions.filter(q=>q.type===type)})).filter(g=>g.items.length));const timerText=computed(()=>`${String(Math.floor(remaining.value/3600)).padStart(2,"0")}:${String(Math.floor(remaining.value%3600/60)).padStart(2,"0")}:${String(remaining.value%60).padStart(2,"0")}`);
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onMounted(load);onBeforeUnmount(()=>clearInterval(ticker));async function load(){loading.value=true;try{const token=deviceToken();paper.value=(await examApi.getActivePaper(examId,token)).data;paper.value.questions.forEach(q=>{answers[q.id]=q.studentAnswer??(q.type==="MULTIPLE"?[]:"");if(q.answerFileUrl)files[q.id]={name:q.answerFileName,url:q.answerFileUrl}});currentId.value=paper.value.questions[0]?.id;remaining.value=Math.max(0,Math.floor((new Date(paper.value.endTime)-Date.now())/1000));ticker=setInterval(()=>{remaining.value=Math.max(0,remaining.value-1);if(remaining.value===0){clearInterval(ticker);autoSubmit()}},1000)}finally{loading.value=false}}
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function deviceToken(){return localStorage.getItem(`exam-device-${examId}`)||""}function select(id){currentId.value=id}function move(step){currentId.value=paper.value.questions[currentIndex.value+step]?.id}
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function isAnswered(q){const answer=answers[q.id];return(Array.isArray(answer)?answer.length:Boolean(String(answer??"").trim()))||Boolean(files[q.id])}
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async function persist(q){await examApi.saveExamAnswer(examId,q.id,{deviceToken:deviceToken(),answer:answers[q.id]})}
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async function uploadAnswer({file}){const form=new FormData();form.append("file",file);const data=(await examApi.uploadExamAnswerFile(examId,current.value.id,deviceToken(),form)).data;files[current.value.id]={name:data.name,url:data.url};ElMessage.success("作答文件已上传")}
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async function confirmSubmit(){const unanswered=paper.value.questions.filter(q=>!isAnswered(q)).length;await ElMessageBox.confirm(unanswered?`还有 ${unanswered} 道题未作答，确认交卷？`:"确认提交试卷？交卷后需由教师回退才能再次进入。","确认交卷",{type:"warning",confirmButtonText:"确认交卷"});await doSubmit()}
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async function doSubmit(){await examApi.submitExam(examId,deviceToken());ElMessage.success("交卷成功");router.replace("/examination/index")}
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async function autoSubmit(){try{await doSubmit()}catch{router.replace("/examination/index")}}
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function formatTime(v){return v?new Date(v).toLocaleString("zh-CN",{hour12:false}).replaceAll("/","-"):"-"}
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</script>
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<style scoped lang="scss">
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.take-page { min-height: calc(100vh - 104px); margin: 10px auto 32px; padding: 28px 32px 34px; }
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.take-head { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 18px; padding: 0 4px 20px; border-bottom: 1px solid var(--exam-line);
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h1 { font-size: 28px; font-weight: 800; line-height: 1.2; margin: 0; letter-spacing: .02em; } p { margin: 8px 0 0; color: var(--exam-muted); font-size: 14px; }
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.timer { display: flex; align-items: center; gap: 8px; color: var(--exam-muted); font-size: 14px; strong { font-size: 22px; font-weight: 800; font-variant-numeric: tabular-nums; color: #7fe3ff; } &.urgent strong { color: #ffb35c; } }
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}
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.exam-body { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 22px; margin-top: 24px; }
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.answer-sheet { background: var(--exam-card); border: 1px solid var(--exam-card-border); border-radius: 14px; padding: 18px; align-self: start; position: sticky; top: 16px;
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h2 { font-size: 16px; font-weight: 800; margin: 0 0 18px; } footer { display: flex; gap: 18px; color: var(--exam-muted); font-size: 12px; border-top: 1px solid var(--exam-line); padding-top: 12px; }
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footer i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; border: 1px solid rgba(127, 186, 215, .55); margin-right: 5px; vertical-align: -1px; } footer .answered-dot { background: rgba(87, 217, 168, .16); border-color: rgba(87, 217, 168, .55); }
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}
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.sheet-group { margin-bottom: 16px; &:last-child { margin-bottom: 0; } h3 { font-size: 13px; font-weight: 700; color: var(--exam-muted); margin: 0 0 8px; } div { display: grid; grid-template-columns: repeat(5, 1fr); gap: 7px; }
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button { aspect-ratio: 1; border: 1px solid rgba(127, 186, 215, .35); background: transparent; border-radius: 8px; color: var(--exam-secondary); font-size: 14px; font-weight: 700; cursor: pointer; transition: border-color .2s ease, background .2s ease, transform .2s ease;
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&:hover { border-color: rgba(99, 217, 255, .55); transform: translateY(-1px); } &.answered { background: rgba(87, 217, 168, .16); border-color: rgba(87, 217, 168, .55); color: #d9fff0; } &.current { outline: 2px solid var(--exam-current); outline-offset: 1px; } }
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}
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.question-panel { background: var(--exam-card); border: 1px solid var(--exam-card-border); border-radius: 14px; padding: 24px 28px 28px;
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> header { display: flex; justify-content: space-between; align-items: baseline; color: var(--exam-accent); font-size: 12px; font-weight: 800; border-bottom: 1px solid var(--exam-line); padding-bottom: 12px; b { font-size: 14px; color: var(--exam-secondary); } }
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> h2 { font-size: 18px; line-height: 1.7; color: var(--exam-text); margin: 22px 0; }
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.material { display: inline-flex; align-items: center; gap: 6px; color: var(--exam-accent); margin-bottom: 16px; } .choice-list { display: grid; gap: 8px; width: 100%; }
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.judgement { grid-template-columns: 1fr 1fr; } .file-answer { display: flex; align-items: center; gap: 12px; margin-top: 12px; color: var(--exam-secondary); }
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}
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.exam-actions { display: flex; justify-content: center; gap: 14px; margin-top: 22px; }
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.exam-submit { display: flex; justify-content: center; margin-top: 36px; }
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@media (max-width: 900px) { .exam-actions { flex-direction: column; gap: 14px; .exam-outline-action, .exam-primary-action { width: 100%; } } }
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@media (max-width: 760px) { .take-page { padding: 20px 16px 24px; } .take-head { grid-template-columns: 1fr; padding: 10px 4px 16px; .timer { grid-row: 2; margin-top: 8px; } } .exam-body { grid-template-columns: 1fr; margin-top: 16px; } .answer-sheet { position: static; } .sheet-group div { grid-template-columns: repeat(8, 1fr); } .question-panel { padding: 20px 18px 22px; } .exam-submit { margin-top: 22px; } }
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</style>
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