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feat(ProblemSet): 增加了 ProblemSet 页面
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‎README.md‎

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# Codeforces Client
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**Copyleft (c) 2020.Mauve**
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**Copyleft ! 2020.Mauve，版权部分所有，遵循 GPL 授权使用**
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## Codeforces 打开好慢，加载题面好慢
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- [ ] css 自定义页面
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- [x] 加快获取 XCsrfToken(0.4.0)
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- [x] 题面中的链接使用本地浏览器打开(0.5.0)
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- [ ] problemset 页面
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- [x] problemset 页面
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- [ ] 多语言
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- [ ] 将项目转为 electron-vue 项目
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## 许可证
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Codeforces Client 使用 GPL 许可证开源
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‎src/components/About.vue‎

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<a href="https://github.com/Hukeqing/codeforces-client/releases" target="_blank"
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style="text-decoration:none;color: #3a8ee6; margin-left: 40px">Latest Release</a>
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</h2>
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<p style="margin-top: 120px; font-size: 14px">
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Copyleft ! 2020.Mauve，版权部分所有，遵循 GPL 授权使用
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</p>
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</div>
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</template>
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‎src/components/Contest.vue‎

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} else {
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this.problems = p
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this.notFetch = false
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this.$emit('proMessage', {contest: this.myCid, id: '', next: '5'})
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this.$emit('proMessage', {contest: this.myCid, id: '', next: '4-2'})
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}
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this.loading = false
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})

‎src/components/Home.vue‎

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<el-menu-item index="4-2">
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<span slot="title">
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<i class="el-icon-menu"></i>
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比赛题目列表
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比赛题目
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</span>
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</el-menu-item>
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<el-menu-item index="4-3">
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<el-menu-item index="5">
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<span slot="title">
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<i class="el-icon-document"></i>
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比赛题面
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题面
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</span>
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</el-menu-item>
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<el-menu-item index="6">
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<Status v-if="status==='3'" :user="user"></Status>
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<ContestList v-if="status==='4-1'" v-on:proMessage="proMessage"></ContestList>
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<Contest v-if="status==='4-2'" :contestId="contestId" v-on:proMessage="proMessage"></Contest>
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<ProblemSet v-if="status==='4-3'"></ProblemSet>
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<ProblemSet v-if="status==='4-3'" v-on:proMessage="proMessage"></ProblemSet>
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<Problem v-if="status==='5'" :contestId="contestId" :problemId="problemId" v-on:proMessage="proMessage"></Problem>
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<LocalManager v-if="status==='6'"></LocalManager>
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<About v-if="status==='7'"></About>

‎src/components/ProblemSet.vue‎

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<template>
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<div class="main">
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<el-form ref="form" label-width="80px"
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style="box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1); padding-top: 10px; padding-right: 20px; padding-bottom: 3px">
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<el-form-item label="题目标签">
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<el-select v-model="label" multiple placeholder="请选择题目标签">
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<el-option
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v-for="item in options"
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:key="item.value"
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:label="item.title"
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:value="item.value"
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clearable>
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</el-option>
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</el-select>
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</el-form-item>
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<el-form-item label="分数范围">
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<el-slider
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v-model="score"
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range
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:step="100"
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:max="3500">
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</el-slider>
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</el-form-item>
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<el-form-item>
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<el-cascader
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v-model="sortValue"
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:options="sortOptions"
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:props="{ expandTrigger: 'hover' }"></el-cascader>
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<el-button type="primary" @click="getProblemSet" style="margin-left: 10px; width: 120px"
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:loading="loading">拉取
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</el-button>
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</el-form-item>
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</el-form>
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<template v-if="!notFetch">
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<el-table :data="problems"
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style="width: 100%"
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:row-class-name="getColor">
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<el-table-column
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prop="contest"
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label="Contest"
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align="center"
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min-width="75">
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</el-table-column>
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<el-table-column
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prop="id"
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label="ID"
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align="center"
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min-width="25">
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</el-table-column>
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<el-table-column
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prop="name"
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label="name"
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align="center"
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min-width="300">
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</el-table-column>
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<el-table-column
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prop="score"
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label="score"
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align="center"
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min-width="100">
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</el-table-column>
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<el-table-column
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prop="passed"
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label="passed"
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align="center"
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min-width="50">
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</el-table-column>
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<el-table-column
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label=""
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align="center"
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min-width="50">
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<template scope="scope">
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<el-button type="primary"
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v-on:click="clickProblem(scope.$index)">
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进入
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</el-button>
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</template>
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</el-table-column>
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</el-table>
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</template>
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</div>
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</template>
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<script>
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let problemSet = require('../static/crawler/problemSet')
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export default {
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name: "ProblemSet",
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data() {
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return {
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loading: false,
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notFetch: true,
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problems: [],
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options: [{value: "combine-tags-by-or", title: "*combine tags by OR"},
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{value: "2-sat", title: "2-sat"},
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{value: "binary search", title: "binary search"},
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{value: "bitmasks", title: "bitmasks"},
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{value: "brute force", title: "brute force"},
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{value: "chinese remainder theorem", title: "chinese remainder theorem"},
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{value: "combinatorics", title: "combinatorics"},
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{value: "constructive algorithms", title: "constructive algorithms"},
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{value: "data structures", title: "data structures"},
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{value: "dfs and similar", title: "dfs and similar"},
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{value: "divide and conquer", title: "divide and conquer"},
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{value: "dp", title: "dp"},
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{value: "dsu", title: "dsu"},
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{value: "expression parsing", title: "expression parsing"},
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{value: "fft", title: "fft"},
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{value: "flows", title: "flows"},
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{value: "games", title: "games"},
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{value: "geometry", title: "geometry"},
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{value: "graph matchings", title: "graph matchings"},
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{value: "graphs", title: "graphs"},
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{value: "greedy", title: "greedy"},
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{value: "hashing", title: "hashing"},
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{value: "implementation", title: "implementation"},
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{value: "interactive", title: "interactive"},
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{value: "math", title: "math"},
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{value: "matrices", title: "matrices"},
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{value: "meet-in-the-middle", title: "meet-in-the-middle"},
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{value: "number theory", title: "number theory"},
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{value: "probabilities", title: "probabilities"},
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{value: "schedules", title: "schedules"},
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{value: "shortest paths", title: "shortest paths"},
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{value: "sortings", title: "sortings"},
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{value: "string suffix structures", title: "string suffix structures"},
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{value: "strings", title: "strings"},
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{value: "ternary search", title: "ternary search"},
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{value: "trees", title: "trees"},
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{value: "two pointers", title: "two pointers"}
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],
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label: [],
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score: [0, 3500],
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sortOptions: [
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{
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value: '0',
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label: '默认排序',
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},
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{
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value: '1',
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label: '按分数排序',
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children: [
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{
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value: 'BY_RATING_ASC',
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label: '升序',
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},
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{
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value: 'BY_RATING_DESC',
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label: '降序',
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}]
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}, {
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value: '2',
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label: '按通过人数排序',
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children: [
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{
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value: 'BY_SOLVED_ASC',
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label: '升序',
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},
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{
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value: 'BY_SOLVED_DESC',
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label: '降序',
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}]
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}
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],
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sortValue: ['0']
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}
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},
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methods: {
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getProblemSet() {
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this.notFetch = true
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this.loading = true
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let args = '?'
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if (this.sortValue[0] !== '0')
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args += 'order=' + this.sortValue[1] + '&'
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if (this.label.length !== 0)
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args += 'tags=' + this.label.join(',')
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if (this.label.length !== 0)
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args += ',' + this.score[0] + '-' + this.score[1]
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else
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args += 'tags=' + this.score[0] + '-' + this.score[1]
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problemSet.getProblemSetList(args, (e, p) => {
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if (e) {
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console.log(p)
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this.$message.error('拉取失败')
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} else {
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this.notFetch = false
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this.problems = p
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}
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this.loading = false
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})
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},
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// eslint-disable-next-line no-unused-vars
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getColor({row, rowIndex}) {
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if (row.status === 1)
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return 'accept'
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if (row.status === 2)
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return 'reject'
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},
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clickProblem(index) {
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console.log(this.problems[index].id)
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this.$emit('proMessage', {contest: this.problems[index].contest, id: this.problems[index].id, next: '5'})
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}
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}
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}
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</script>
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<style scoped>
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.el-select {
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width: 100%;
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}
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.el-table .accept {
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background: #64ff64;
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}
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.el-table .reject {
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background: #ff6464;
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}
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</style>

‎src/static/crawler/problemSet.js‎

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let basic = require('./basic')
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let request = require('request')
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let cheerio = require('cheerio')
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module.exports = {
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getProblemSetList: function (args, callback) {
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let opts = {
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url: 'https://codeforces.com/problemset' + args,
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method: 'GET',
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headers: {
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'User-Agent': basic.userAgent
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}
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}
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request(opts, (e, r, b) => {
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try {
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let $ = cheerio.load(b)
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let problems = $('table[class=problems]').html().replace(/[\r\n]/g, '')
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let problemList = problems.split('<tr')
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let res = []
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for (let i = 2; i < problemList.length; ++i) {
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let pro = {}
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if (/accepted-problem/.test(problemList[i])) {
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pro['status'] = 1
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} else if (/rejected-problem/.test(problemList[i])) {
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pro['status'] = 2
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} else {
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pro['status'] = 0
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}
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let problemLink = problemList[i].match(/<div style="float: left;">.+?\/problemset\/problem\/(.+?)\/(.+?)">(.+?)<\/a>/)
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pro['contest'] = problemLink[1]
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pro['id'] = problemLink[2]
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pro['name'] = problemLink[3].replace(/ *$/, '')
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pro['score'] = problemList[i].match(/<span title="Difficulty" class="ProblemRating">(.+?)<\/span>/)[1]
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pro['passed'] = problemList[i].match(/<a title="Participants solved the problem".+?x(\d+?)<\/a>/)[1]
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res.push(pro)
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}
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callback(false, res)
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} catch (e) {
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callback(true, e)
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}
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})
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}
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}

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