import { computed, ref, watch } from "vue"
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import type { PropType } from "vue"
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import { deepMerge } from "/@/cool/utils"
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import { cloneDeep } from "lodash-es"
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export const TreeProps = {
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// 绑定值
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modelValue: [String, Number, Array],
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// 数据
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data: {
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type: Array as PropType<ClTree.Item[]>,
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default: () => []
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},
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// 是否多选
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multiple: Boolean,
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// 每一行的高度
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rowHeight: {
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type: Number,
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default: 64
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},
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// 是否每项都能选择
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checkStrictly: Boolean,
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// 是否默认全部展开
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defaultExpandAll: Boolean,
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// 默认值是否自动展开
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autoExpand: {
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type: Boolean,
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default: true
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},
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// 是否每次只打开一个同级树节点展开
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accordion: Boolean,
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// 关键字
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keys: Object as PropType<ClTree.Keys>
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}
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export function useTree({ props, emit }: any) {
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// 绑定值
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const value = ref<any[]>([])
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watch(
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() => props.modelValue,
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(val) => {
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value.value = props.multiple ? val : [val]
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},
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{
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immediate: true
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}
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)
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// 更新值
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function updateValue(val: any) {
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if (props.multiple) {
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const i = value.value.indexOf(val)
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if (i >= 0) {
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value.value.splice(i, 1)
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} else {
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value.value.push(val)
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}
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} else {
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value.value = [val]
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}
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const v = props.multiple ? value.value : value.value[0]
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emit("update:modelValue", v)
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emit("change", v)
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}
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// 关键字
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const keys = computed(() => {
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return deepMerge({ label: "label", value: "value", children: "children" }, props.keys)
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})
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// 获取key
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function getKey(key: string, value: ClTree.Item) {
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return value[keys.value[key]]
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}
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// 显示内容
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const label = computed(() => {
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const t: string[] = []
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function deep(arr: ClTree.Item[]) {
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arr.forEach((e) => {
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if (value.value.includes(getKey("value", e))) {
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t.push(getKey("label", e))
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}
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if (getKey("children", e)) {
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deep(getKey("children", e))
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}
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})
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}
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deep(props.data)
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return t.join("、")
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})
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// 数据
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const data = ref<ClTree.Item[]>([])
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// 没有子集
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const noChildren = computed(() => {
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return !data.value.find((e) => e.children)
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})
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// 格式化数据
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function getData(val: any[]) {
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const d = cloneDeep(val)
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function deep(arr: ClTree.Item[], p?: ClTree.Item) {
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arr.forEach((e) => {
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// 默认值展开
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if (props.autoExpand && value.value.includes(getKey("value", e))) {
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if (p) {
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p.isExpand = true
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}
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}
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if (getKey("children", e)) {
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// 默认全部展开
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if (props.defaultExpandAll) {
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e.isExpand = true
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}
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deep(getKey("children", e), e)
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if (e?.isExpand) {
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if (p) {
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p.isExpand = true
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}
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}
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}
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})
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}
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deep(d)
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data.value = d
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}
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// 监听数据
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watch(() => props.data, getData, {
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immediate: true
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})
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return {
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value,
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updateValue,
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keys,
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getKey,
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label,
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data,
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noChildren
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}
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}
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