<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch">
      <el-form-item label="分类名称" prop="name">
        <el-input
          v-model="queryParams.name"
          placeholder="请输入分类名称"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="分类代码" prop="code">
        <el-input
          v-model="queryParams.code"
          placeholder="请输入分类代码"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          plain
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
          v-hasPermi="['knowledge:category:add']"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="info"
          plain
          icon="el-icon-sort"
          size="mini"
          @click="toggleExpandAll"
        >展开/折叠</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table
      v-if="refreshTable"
      v-loading="loading"
      :data="categoryList"
      row-key="id"
      :default-expand-all="isExpandAll"
      :tree-props="{children: 'children', hasChildren: 'hasChildren'}"
    >
      <el-table-column prop="name" label="分类名称" :show-overflow-tooltip="true" min-width="200"></el-table-column>
      <el-table-column prop="code" label="分类代码" :show-overflow-tooltip="true" min-width="150"></el-table-column>
      <el-table-column prop="sortOrder" label="显示顺序" align="center" width="100"></el-table-column>
      <el-table-column prop="description" label="描述" :show-overflow-tooltip="true" min-width="200"></el-table-column>
      <el-table-column label="创建时间" align="center" prop="createTime" width="180">
        <template slot-scope="scope">
          <span>{{ parseTime(scope.row.createTime) }}</span>
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width" width="200">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['knowledge:category:edit']"
          >修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-plus"
            @click="handleAdd(scope.row)"
            v-hasPermi="['knowledge:category:add']"
          >新增</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['knowledge:category:remove']"
          >删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 添加或修改知识库分类对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="600px" append-to-body :close-on-click-modal="false">
      <el-form ref="form" :model="form" :rules="rules" label-width="100px">
        <el-row>
          <el-col :span="24">
            <el-form-item label="上级分类" prop="parentId">
              <treeselect
                v-model="form.parentId"
                :options="categoryOptions"
                :normalizer="normalizer"
                :show-count="true"
                placeholder="选择上级分类"
              />
            </el-form-item>
          </el-col>
        </el-row>
        <el-row>
          <el-col :span="12">
            <el-form-item label="分类代码" prop="code">
              <el-input v-model="form.code" placeholder="请输入分类代码" />
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="分类名称" prop="name">
              <el-input v-model="form.name" placeholder="请输入分类名称" />
            </el-form-item>
          </el-col>
        </el-row>
        <el-row>
          <el-col :span="12">
            <el-form-item label="显示顺序" prop="sortOrder">
              <el-input-number v-model="form.sortOrder" controls-position="right" :min="0" />
            </el-form-item>
          </el-col>
        </el-row>
        <el-row>
          <el-col :span="24">
            <el-form-item label="描述" prop="description">
              <el-input v-model="form.description" type="textarea" placeholder="请输入描述" :rows="3"></el-input>
            </el-form-item>
          </el-col>
        </el-row>
        <el-row>
          <el-col :span="24">
            <el-form-item label="备注" prop="remark">
              <el-input v-model="form.remark" type="textarea" placeholder="请输入备注" :rows="2"></el-input>
            </el-form-item>
          </el-col>
        </el-row>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import {
  listKnowledgeCategories,
  getKnowledgeCategory,
  deleteKnowledgeCategory,
  addKnowledgeCategory,
  updateKnowledgeCategory
} from '@/api/knowledge/category'
import Treeselect from '@riophae/vue-treeselect'
import '@riophae/vue-treeselect/dist/vue-treeselect.css'

export default {
  name: 'KnowledgeCategory',
  components: { Treeselect },
  data() {
    return {
      // 遮罩层
      loading: true,
      // 显示搜索条件
      showSearch: true,
      // 分类表格树数据
      categoryList: [],
      // 分类树选项
      categoryOptions: [],
      // 弹出层标题
      title: '',
      // 是否显示弹出层
      open: false,
      // 是否展开，默认全部展开
      isExpandAll: true,
      // 重新渲染表格状态
      refreshTable: true,
      // 查询参数
      queryParams: {
        name: undefined,
        code: undefined
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        name: [
          { required: true, message: '分类名称不能为空', trigger: 'blur' }
        ],
        sortOrder: [
          { required: true, message: '显示顺序不能为空', trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getList()
  },
  methods: {
    /** 查询分类列表 */
    getList() {
      this.loading = true
      listKnowledgeCategories().then(response => {
        // 后端已经返回树形结构，如果数据是扁平结构则使用handleTree转换
        if (response.data && response.data.length > 0 && !response.data[0].children) {
          this.categoryList = this.handleTree(response.data, 'id', 'parentId')
        } else {
          this.categoryList = response.data || []
        }
        this.loading = false
      })
    },
    /** 转换分类数据结构 */
    normalizer(node) {
      if (node.children && !node.children.length) {
        delete node.children
      }
      return {
        id: node.id,
        label: node.name,
        children: node.children
      }
    },
    /** 查询分类下拉树结构 */
    getTreeselect() {
      listKnowledgeCategories().then(response => {
        this.categoryOptions = []
        const category = { id: 0, name: '主类目', children: [] }
        // 后端已经返回树形结构，如果数据是扁平结构则使用handleTree转换
        if (response.data && response.data.length > 0 && !response.data[0].children) {
          category.children = this.handleTree(response.data, 'id', 'parentId')
        } else {
          category.children = response.data || []
        }
        this.categoryOptions.push(category)
      })
    },
    // 取消按钮
    cancel() {
      this.open = false
      this.reset()
    },
    // 表单重置
    reset() {
      this.form = {
        id: undefined,
        parentId: 0,
        name: undefined,
        code: undefined,
        sortOrder: 0,
        description: undefined,
        remark: undefined
      }
      this.resetForm('form')
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.getList()
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm('queryForm')
      this.handleQuery()
    },
    /** 新增按钮操作 */
    handleAdd(row) {
      this.reset()
      this.getTreeselect()
      if (row != undefined && row.id) {
        this.form.parentId = row.id
      } else {
        this.form.parentId = 0
      }
      this.open = true
      this.title = '添加知识库分类'
    },
    /** 展开/折叠操作 */
    toggleExpandAll() {
      this.refreshTable = false
      this.isExpandAll = !this.isExpandAll
      this.$nextTick(() => {
        this.refreshTable = true
      })
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset()
      this.getTreeselect()
      getKnowledgeCategory(row.id).then(response => {
        this.form = response.data
        this.open = true
        this.title = '修改知识库分类'
      })
    },
    /** 提交按钮 */
    submitForm() {
      this.$refs['form'].validate(valid => {
        if (valid) {
          if (this.form.id != undefined) {
            updateKnowledgeCategory(this.form.id, this.form).then(response => {
              this.$modal.msgSuccess('修改成功')
              this.open = false
              this.getList()
            })
          } else {
            addKnowledgeCategory(this.form).then(response => {
              this.$modal.msgSuccess('新增成功')
              this.open = false
              this.getList()
            })
          }
        }
      })
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      this.$modal.confirm('是否确认删除名称为"' + row.name + '"的数据项？').then(function() {
        return deleteKnowledgeCategory(row.id)
      }).then(() => {
        this.getList()
        this.$modal.msgSuccess('删除成功')
      }).catch(() => {})
    }
  }
}
</script>

