src/views/forum/ForumSectionView.vue

<template>
  <div class="section-page">
    <Navbar />
    <div class="page-container">
      <!-- 面包屑导航 -->
      <div class="breadcrumb">
        <el-breadcrumb separator="/">
          <el-breadcrumb-item :to="{ path: '/forum' }">论坛首页</el-breadcrumb-item>
          <el-breadcrumb-item>{{ sectionInfo.name }}</el-breadcrumb-item>
        </el-breadcrumb>
      </div>

      <!-- 版块信息 -->
      <div class="section-header">
        <div class="section-info">
          <div class="section-icon">
            <el-icon size="48" :color="sectionInfo.color">
              <component :is="sectionInfo.icon" />
            </el-icon>
          </div>
          <div class="section-details">
            <h1 class="section-name">{{ sectionInfo.name }}</h1>
            <p class="section-description">{{ sectionInfo.description }}</p>
            <div class="section-stats">
              <div class="stat-item">
                <el-icon><ChatDotRound /></el-icon>
                <span>{{ sectionInfo.topics }} 主题</span>
              </div>
            </div>
          </div>
        </div>
        
        <div class="section-actions">
          <el-button type="primary" :icon="Edit" @click="showNewTopicDialog = true">
            发布新主题
          </el-button>
        </div>
      </div>

      <!-- 筛选和搜索 -->
      <div class="filter-section">
        <div class="filter-left">
          <el-input
            v-model="searchQuery"
            placeholder="搜索主题..."
            :prefix-icon="Search"
            @keyup.enter="handleSearch"
            clearable
            style="width: 300px;"
          />
          <el-button type="primary" @click="handleSearch">搜索</el-button>
        </div>
        
        <div class="filter-right">
          <el-select v-model="sortBy" placeholder="排序方式" @change="handleFilter">
            <el-option label="最新回复" value="last_reply" />
            <el-option label="发布时间" value="create_time" />
            <el-option label="回复数量" value="replies" />
            <el-option label="浏览次数" value="views" />
          </el-select>
          
          <el-select v-model="filterType" placeholder="主题类型" @change="handleFilter">
            <el-option label="全部主题" value="" />
            <el-option label="置顶主题" value="pinned" />
            <el-option label="热门主题" value="hot" />
            <el-option label="精华主题" value="featured" />
          </el-select>
        </div>
      </div>

      <!-- 置顶主题 -->
      <div v-if="pinnedTopics.length > 0" class="pinned-topics">
        <h3 class="section-title">置顶主题</h3>
        <div class="topics-list">
          <div
            v-for="topic in pinnedTopics"
            :key="topic.id"
            class="topic-item pinned"
            @click="navigateToTopic(topic.id)"
          >
            <div class="topic-status">
              <el-icon class="pin-icon"><Top /></el-icon>
            </div>
            
            <div class="topic-content">
              <div class="topic-header">
                <h4 class="topic-title">{{ topic.title }}</h4>
                <div class="topic-tags">
                  <el-tag type="warning" size="small">置顶</el-tag>
                  <el-tag v-if="topic.hot" type="danger" size="small">热门</el-tag>
                  <el-tag v-if="topic.featured" type="success" size="small">精华</el-tag>
                </div>
              </div>
              
              <div class="topic-meta">
                <div class="author-info">
                  <el-avatar :size="24">{{ topic.user?.username ? topic.user.username.charAt(0) : 'A' }}</el-avatar>
                  <span class="author-name">{{ topic.user?.username || '匿名' }}</span>
                  <span class="create-time">{{ formatTime(topic.createTime) }}</span>
                </div>
                
                <div class="topic-stats">
                  <span class="stat-item">
                    <el-icon><View /></el-icon>
                    {{ topic.views }}
                  </span>
                  <span class="stat-item">
                    <el-icon><Comment /></el-icon>
                    {{ topic.replies }}
                  </span>
                </div>
              </div>
            </div>
            
            <div class="last-reply">
              <div v-if="topic.lastReply" class="reply-info">
                <div class="reply-author">{{ topic.lastReply.author }}</div>
                <div class="reply-time">{{ formatTime(topic.lastReply.time) }}</div>
              </div>
            </div>
          </div>
        </div>
      </div>

      <!-- 普通主题列表 -->
      <div class="normal-topics">
        <div class="section-header">
          <h3 class="section-title">主题列表</h3>
          <div class="results-info">
            共 {{ totalTopics }} 个主题
          </div>
        </div>
        
        <div class="topics-list" v-loading="loading">
          <div
            v-for="topic in topics"
            :key="topic.id"
            class="topic-item"
            @click="navigateToTopic(topic.id)"
          >
            <div class="topic-status">
              <el-icon v-if="topic.hasNewReplies" class="new-icon" color="#f56c6c">
                <ChatDotRound />
              </el-icon>
              <el-icon v-else class="normal-icon" color="#909399">
                <ChatLineRound />
              </el-icon>
            </div>
            
            <div class="topic-content">
              <div class="topic-header">
                <h4 class="topic-title">{{ topic.title }}</h4>
                <div class="topic-tags">
                  <el-tag v-if="topic.hot" type="danger" size="small">热门</el-tag>
                  <el-tag v-if="topic.featured" type="success" size="small">精华</el-tag>
                  <el-tag v-if="topic.closed" type="info" size="small">已关闭</el-tag>
                </div>
              </div>
              
              <div class="topic-meta">
                <div class="author-info">
                  <el-avatar :size="24">{{ topic.user?.username ? topic.user.username.charAt(0) : 'A' }}</el-avatar>
                  <span class="author-name">{{ topic.user?.username || '匿名' }}</span>
                  <span class="create-time">{{ formatTime(topic.createTime) }}</span>
                </div>
                
                <div class="topic-stats">
                  <span class="stat-item">
                    <el-icon><View /></el-icon>
                    {{ topic.views }}
                  </span>
                  <span class="stat-item">
                    <el-icon><Comment /></el-icon>
                    {{ topic.replies }}
                  </span>
                </div>
              </div>
            </div>
            
            <div class="last-reply">
              <div v-if="topic.lastReply" class="reply-info">
                <div class="reply-author">{{ topic.lastReply.author }}</div>
                <div class="reply-time">{{ formatTime(topic.lastReply.time) }}</div>
              </div>
              <div v-else class="no-reply">暂无回复</div>
            </div>
          </div>
          
          <div v-if="topics.length === 0 && !loading" class="no-topics">
            暂无主题，快来发布第一个主题吧！
          </div>
        </div>
        
        <!-- 分页 -->
        <div class="pagination-wrapper">
          <el-pagination
            v-model="currentPage"
            :page-size="pageSize"
            :page-sizes="[20, 50, 100]"
            :total="totalTopics"
            layout="total, sizes, prev, pager, next, jumper"
            @size-change="handleSizeChange"
            @current-change="handleCurrentChange"
          />
        </div>
      </div>
    </div>

    <!-- 发布新主题对话框 -->
    <el-dialog
      v-model="showNewTopicDialog"
      title="发布新主题"
      width="600px"
      :before-close="handleCloseDialog"
    >
      <el-form
        ref="topicFormRef"
        :model="newTopic"
        :rules="topicRules"
        label-width="80px"
      >
        <el-form-item label="主题标题" prop="title">
          <el-input
            v-model="newTopic.title"
            placeholder="请输入主题标题"
            maxlength="100"
            show-word-limit
          />
        </el-form-item>
        
        <el-form-item label="主题标签">
          <div class="tags-input">
            <el-tag
              v-for="tag in newTopic.tags"
              :key="tag"
              closable
              @close="removeTopicTag(tag)"
            >
              {{ tag }}
            </el-tag>
            <el-input
              v-if="tagInputVisible"
              ref="tagInputRef"
              v-model="tagInputValue"
              size="small"
              @keyup.enter="addTopicTag"
              @blur="addTopicTag"
              style="width: 100px;"
            />
            <el-button
              v-else
              size="small"
              @click="showTagInput"
            >
              + 添加标签
            </el-button>
          </div>
        </el-form-item>
        
        <el-form-item label="主题内容" prop="content">
          <el-input
            v-model="newTopic.content"
            type="textarea"
            :rows="8"
            placeholder="请输入主题内容..."
            maxlength="5000"
            show-word-limit
          />
        </el-form-item>
        
        <el-form-item label="主题选项">
          <el-checkbox-group v-model="newTopic.options">
            <el-checkbox label="hot">申请热门</el-checkbox>
            <el-checkbox label="featured">申请精华</el-checkbox>
          </el-checkbox-group>
        </el-form-item>
      </el-form>
      
      <template #footer>
        <el-button @click="handleCloseDialog">取消</el-button>
        <el-button type="primary" @click="submitNewTopic" :loading="submitting">
          发布主题
        </el-button>
      </template>
    </el-dialog>
  </div>
</template>

<script>
import { ref, reactive, onMounted, nextTick } from 'vue'
import { useRoute, useRouter } from 'vue-router'
import { ElMessage, ElMessageBox } from 'element-plus'
import {
  Edit,
  Search,
  ChatDotRound,
  Comment,
  User,
  View,
  Top,
  ChatLineRound,
  Film,
  Headphones,
  Monitor,
  GamePad,
  Bell,
  QuestionFilled
} from '@element-plus/icons-vue'
import { getTopicsByForum, createTopic } from '@/api/topic'
import Navbar from "@/components/Navbar.vue";

export default {
  name: 'ForumSectionView',
  components: {Navbar},
  setup() {
    const route = useRoute()
    const router = useRouter()
    const topicFormRef = ref(null)
    const tagInputRef = ref(null)
    
    const loading = ref(false)
    const showNewTopicDialog = ref(false)
    const submitting = ref(false)
    const tagInputVisible = ref(false)
    const tagInputValue = ref('')
    
    const searchQuery = ref('')
    const sortBy = ref('last_reply')
    const filterType = ref('')
    const currentPage = ref(1)
    const pageSize = ref(20)
    const totalTopics = ref(0)
    
    const sectionInfo = ref({
      id: 1,
      name: '电影讨论',
      description: '分享和讨论电影资源，交流观影心得',
      icon: 'Film',
      color: '#409eff',
      topics: 3256,
      replies: 18934,
      members: 1234
    })
    
    const newTopic = reactive({
      title: '',
      content: '',
      tags: [],
      options: []
    })
    
    const topicRules = {
      title: [
        { required: true, message: '请输入标题', trigger: 'blur' },
        { min: 5, max: 100, message: '标题长度在 5 到 100 个字符', trigger: 'blur' }
      ],
      content: [
        { required: true, message: '请输入内容', trigger: 'blur' },
        { min: 10, max: 5000, message: '内容长度在 10 到 5000 个字符', trigger: 'blur' }
      ]
    }
    
    const pinnedTopics = ref([
      {
        id: 1,
        title: '【公告】本版块发帖规则和注意事项',
        author: 'Admin',
        createTime: '2025-05-01T10:00:00',
        views: 5678,
        replies: 23,
        hot: false,
        featured: true,
        lastReply: {
          author: 'User123',
          time: '2025-06-02T15:30:00'
        }
      }
    ])
    
    const topics = ref([])
    
    onMounted(() => {
      const sectionId = route.params.id
      fetchSectionData(sectionId)
      fetchTopics()
    })
    
    const fetchSectionData = async (id) => {
      loading.value = true
      try {
        // 模拟API调用
        console.log('获取版块数据:', id)
        
        // 根据版块ID设置不同的版块信息
        const sections = {
          1: { name: '电影讨论', description: '分享和讨论电影资源，交流观影心得', icon: 'Film', color: '#409eff' },
          2: { name: '音乐分享', description: '音乐资源分享，音乐制作技术交流', icon: 'Headphones', color: '#67c23a' },
          3: { name: '软件技术', description: '软件资源分享，技术问题讨论', icon: 'Monitor', color: '#e6a23c' },
          4: { name: '游戏天地', description: '游戏资源分享，游戏攻略讨论', icon: 'GamePad', color: '#f56c6c' },
          5: { name: '站务公告', description: '网站公告，规则说明，意见建议', icon: 'Bell', color: '#909399' },
          6: { name: '新手求助', description: '新手问题解答，使用教程分享', icon: 'QuestionFilled', color: '#606266' }
        }
        
        const sectionData = sections[id] || sections[1]
        sectionInfo.value = {
          id: parseInt(id),
          ...sectionData,
          topics: 0  // 初始化为0，会在fetchTopics中更新为真实数量
        }
        
        totalTopics.value = 156
        
      } catch (error) {
        ElMessage.error('获取版块数据失败')
      } finally {
        loading.value = false
      }
    }
    
    const formatTime = (timeString) => {
      const date = new Date(timeString)
      const now = new Date()
      const diff = now - date
      const hours = Math.floor(diff / (1000 * 60 * 60))
      
      if (hours < 1) return '刚刚'
      if (hours < 24) return `${hours}小时前`
      const days = Math.floor(hours / 24)
      if (days < 7) return `${days}天前`
      
      return date.toLocaleDateString('zh-CN', {
        month: '2-digit',
        day: '2-digit',
        hour: '2-digit',
        minute: '2-digit'
      })
    }
    
    const navigateToTopic = (topicId) => {
      router.push(`/forum/topic/${topicId}`)
    }
    
    const handleSearch = () => {
      currentPage.value = 1
      fetchTopics()
    }
    
    const handleFilter = () => {
      currentPage.value = 1
      fetchTopics()
    }
    
    const fetchTopics = async () => {
      loading.value = true
      try {
        // 调用后端API获取主题列表
        const res = await getTopicsByForum(sectionInfo.value.id)
        topics.value = res.data || res // 兼容不同返回结构
        totalTopics.value = topics.value.length
        // 同时更新顶部显示的主题数量
        sectionInfo.value.topics = topics.value.length
      } catch (error) {
        ElMessage.error('获取主题列表失败')
      } finally {
        loading.value = false
      }
    }
    
    const handleSizeChange = (size) => {
      pageSize.value = size
      currentPage.value = 1
      fetchTopics()
    }
    
    const handleCurrentChange = (page) => {
      currentPage.value = page
      fetchTopics()
    }
    
    const showTagInput = () => {
      tagInputVisible.value = true
      nextTick(() => {
        tagInputRef.value?.focus()
      })
    }
    
    const addTopicTag = () => {
      const tag = tagInputValue.value.trim()
      if (tag && !newTopic.tags.includes(tag)) {
        newTopic.tags.push(tag)
      }
      tagInputVisible.value = false
      tagInputValue.value = ''
    }
    
    const removeTopicTag = (tag) => {
      const index = newTopic.tags.indexOf(tag)
      if (index > -1) {
        newTopic.tags.splice(index, 1)
      }
    }
    
    const handleCloseDialog = () => {
      if (newTopic.title || newTopic.content) {
        ElMessageBox.confirm(
          '确定要关闭吗？未保存的内容将会丢失。',
          '提示',
          {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }
        ).then(() => {
          resetForm()
          showNewTopicDialog.value = false
        }).catch(() => {
          // 用户取消
        })
      } else {
        resetForm()
        showNewTopicDialog.value = false
      }
    }
    
    const submitNewTopic = async () => {
      try {
        await topicFormRef.value?.validate()
        
        submitting.value = true
        
        // 构建主题数据
        const topicData = {
          title: newTopic.title,
          content: newTopic.content,
          forumId: sectionInfo.value.id, // 使用当前版块ID
          tags: newTopic.tags,
          isPinned: newTopic.options.includes('hot'),
          isLocked: false
        }
        
        console.log('提交主题数据:', topicData)
        
        // 调用API创建主题
        const response = await createTopic(topicData)
        
        ElMessage.success('主题发布成功！')
        resetForm()
        showNewTopicDialog.value = false
        
        // 刷新主题列表
        fetchTopics()
        
      } catch (error) {
        console.error('发布主题失败:', error)
        ElMessage.error('发布主题失败，请重试')
      } finally {
        submitting.value = false
      }
    }
    
    const resetForm = () => {
      topicFormRef.value?.resetFields()
      newTopic.title = ''
      newTopic.content = ''
      newTopic.tags = []
      newTopic.options = []
    }
    
    return {
      loading,
      showNewTopicDialog,
      submitting,
      tagInputVisible,
      tagInputValue,
      searchQuery,
      sortBy,
      filterType,
      currentPage,
      pageSize,
      totalTopics,
      sectionInfo,
      pinnedTopics,
      topics,
      newTopic,
      topicRules,
      topicFormRef,
      tagInputRef,
      formatTime,
      navigateToTopic,
      handleSearch,
      handleFilter,
      handleSizeChange,
      handleCurrentChange,
      showTagInput,
      addTopicTag,
      removeTopicTag,
      handleCloseDialog,
      submitNewTopic,
      Edit,
      Search,
      ChatDotRound,
      Comment,
      User,
      View,
      Top,
      ChatLineRound,
      Film,
      Headphones,
      Monitor,
      GamePad,
      Bell,
      QuestionFilled
    }
  }
}
</script>

<style lang="scss" scoped>
.section-page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  background: #f5f5f5;
  min-height: 100vh;
}

.breadcrumb {
  margin-bottom: 16px;
}

.section-header {
  background: #fff;
  border-radius: 12px;
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  
  .section-info {
    display: flex;
    align-items: center;
    gap: 20px;
    flex: 1;
    
    .section-details {
      .section-name {
        font-size: 28px;
        font-weight: 600;
        color: #2c3e50;
        margin: 0 0 8px 0;
      }
      
      .section-description {
        font-size: 16px;
        color: #7f8c8d;
        margin: 0 0 16px 0;
      }
      
      .section-stats {
        display: flex;
        gap: 24px;
        
        .stat-item {
          display: flex;
          align-items: center;
          gap: 8px;
          font-size: 14px;
          color: #606266;
        }
      }
    }
  }
  
  .section-actions {
    flex-shrink: 0;
  }
}

.filter-section {
  background: #fff;
  border-radius: 12px;
  padding: 20px 24px;
  margin-bottom: 24px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  
  .filter-left {
    display: flex;
    align-items: center;
    gap: 12px;
  }
  
  .filter-right {
    display: flex;
    align-items: center;
    gap: 12px;
    
    .el-select {
      width: 120px;
    }
  }
}

.pinned-topics, .normal-topics {
  background: #fff;
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  
  .section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    background: none;
    padding: 0;
    box-shadow: none;
    
    .section-title {
      font-size: 18px;
      font-weight: 600;
      color: #2c3e50;
      margin: 0;
    }
    
    .results-info {
      font-size: 14px;
      color: #909399;
    }
  }
}

.topics-list {
  .topic-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    border: 1px solid #f0f0f0;
    border-radius: 8px;
    margin-bottom: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    
    &:hover {
      background: #f8f9fa;
      border-color: #409eff;
      transform: translateX(2px);
    }
    
    &.pinned {
      background: linear-gradient(90deg, #fff7e6 0%, #fff 100%);
      border-color: #e6a23c;
    }
    
    .topic-status {
      width: 32px;
      text-align: center;
      
      .pin-icon {
        color: #e6a23c;
      }
      
      .new-icon {
        animation: pulse 2s infinite;
      }
    }
    
    .topic-content {
      flex: 1;
      
      .topic-header {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 8px;
        
        .topic-title {
          font-size: 16px;
          font-weight: 500;
          color: #2c3e50;
          margin: 0;
          flex: 1;
          
          &:hover {
            color: #409eff;
          }
        }
        
        .topic-tags {
          .el-tag {
            margin-left: 4px;
          }
        }
      }
      
      .topic-meta {
        display: flex;
        justify-content: space-between;
        align-items: center;
        
        .author-info {
          display: flex;
          align-items: center;
          gap: 8px;
          
          .author-name {
            font-size: 14px;
            font-weight: 500;
            color: #606266;
          }
          
          .create-time {
            font-size: 12px;
            color: #909399;
          }
        }
        
        .topic-stats {
          display: flex;
          gap: 16px;
          
          .stat-item {
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            color: #909399;
          }
        }
      }
    }
    
    .last-reply {
      width: 150px;
      text-align: right;
      
      .reply-info {
        .reply-author {
          font-size: 14px;
          font-weight: 500;
          color: #606266;
          margin-bottom: 4px;
        }
        
        .reply-time {
          font-size: 12px;
          color: #909399;
        }
      }
      
      .no-reply {
        font-size: 12px;
        color: #c0c4cc;
      }
    }
  }
  
  .no-topics {
    text-align: center;
    color: #909399;
    padding: 60px 0;
    font-size: 16px;
  }
}

.pagination-wrapper {
  margin-top: 24px;
  text-align: center;
}

.tags-input {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  
  .el-tag {
    margin: 0;
  }
}

@keyframes pulse {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
  }
}

@media (max-width: 768px) {
  .section-page {
    padding: 16px;
  }
  
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    
    .section-info {
      flex-direction: column;
      text-align: center;
      
      .section-stats {
        justify-content: center;
      }
    }
    
    .section-actions {
      width: 100%;
      text-align: center;
    }
  }
  
  .filter-section {
    flex-direction: column;
    gap: 16px;
    
    .filter-left, .filter-right {
      width: 100%;
      justify-content: center;
    }
    
    .filter-right {
      .el-select {
        width: 140px;
      }
    }
  }
  
  .topic-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    
    .topic-status {
      align-self: flex-start;
    }
    
    .topic-content {
      width: 100%;
      
      .topic-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
      }
    }
    
    .last-reply {
      width: 100%;
      text-align: left;
    }
  }
}
</style>