PrivilegeTree.vue
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<template>
<div class="privilege-tree">
<el-tree
ref="privilegeTree"
:data="treeData"
:props="defaultProps"
show-checkbox
node-key="id"
:default-expanded-keys="expandedKeys"
:default-checked-keys="checkedKeys"
@check="handleCheckChange"
></el-tree>
</div>
</template>
<script>
import { queryPrivilegeGroupNoAddPrivilege, addPrivilegeToPrivilegeGroup, deletePrivilegeFromPrivilegeGroup } from '@/api/role/roleApi'
export default {
name: 'PrivilegeTree',
props: {
pgId: {
type: String,
required: true
}
},
data() {
return {
privileges: [],
treeData: [],
defaultProps: {
children: 'children',
label: 'text'
},
expandedKeys: [],
checkedKeys: [],
// Add a variable to store previous state
previousCheckedKeys: []
}
},
watch: {
pgId: {
immediate: true,
handler(newVal) {
if (newVal) {
this.loadPrivileges(newVal)
}
}
}
},
methods: {
async loadPrivileges(pgId) {
try {
const params = {
pgId,
}
const res = await queryPrivilegeGroupNoAddPrivilege(params)
this.privileges = res
this.checkedKeys= []
this.formatTreeData()
// Store initial checked state
this.previousCheckedKeys = [...this.checkedKeys]
} catch (error) {
this.$message.error(error.message)
}
},
formatTreeData() {
const groups = []
const expandedKeys = []
this.privileges.forEach(item => {
if (!groups.some(g => g.gId === item.gId)) {
const group = {
id: `g_${item.gId}`,
gId: item.gId,
text: item.gName,
children: this.formatMenuData(item.gId)
}
groups.push(group)
expandedKeys.push(`g_${item.gId}`)
}
})
this.treeData = groups
this.expandedKeys = expandedKeys
},
formatMenuData(gId) {
const menus = []
this.privileges
.filter(item => item.gId === gId)
.forEach(item => {
if (!menus.some(m => m.mId === item.mId)) {
const menu = {
id: `m_${item.mId}`,
mId: item.mId,
text: item.mName,
children: this.formatPrivilegeData(item.mId)
}
menus.push(menu)
}
})
return menus
},
formatPrivilegeData(mId) {
return this.privileges
.filter(item => item.mId === mId)
.map(item => {
const node = {
id: `p_${item.pId}`,
pId: item.pId,
text: item.pName
}
if (item.pgId) {
this.checkedKeys.push(`p_${item.pId}`)
}
return node
})
},
async handleCheckChange(data, { checkedKeys }) {
// Get current checked privilege IDs
const currentPrivilegeIds = checkedKeys
.filter(key => key.startsWith('p_'))
.map(key => key.replace('p_', ''))
// Find added privileges
const addedPrivileges = currentPrivilegeIds.filter(id =>
!this.previousCheckedKeys.includes(`p_${id}`)
)
// Find removed privileges
const removedPrivileges = this.previousCheckedKeys
.filter(key => key.startsWith('p_'))
.map(key => key.replace('p_', ''))
.filter(id => !currentPrivilegeIds.includes(id))
try {
if (addedPrivileges.length > 0) {
await addPrivilegeToPrivilegeGroup({
pgId: this.pgId,
pIds: addedPrivileges.map(pId => ({ pId }))
})
}
if (removedPrivileges.length > 0) {
await deletePrivilegeFromPrivilegeGroup({
pgId: this.pgId,
pIds: removedPrivileges.map(pId => ({ pId }))
})
}
// Update previous state only after successful API calls
this.previousCheckedKeys = [...checkedKeys]
} catch (error) {
this.$message.error(error.message)
// Revert changes if API call fails
this.$nextTick(() => {
this.$refs.privilegeTree.setCheckedKeys([...this.previousCheckedKeys])
})
}
}
}
}
</script>
<style scoped>
.privilege-tree {
background: #fff;
border-radius: 4px;
padding: 15px;
margin-top: 10px;
}
</style>