<template>
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<a-cascader
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v-model:value="state"
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:options="options"
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:load-data="loadData"
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change-on-select
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@change="handleChange"
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:displayRender="handleRenderDisplay"
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>
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<template #suffixIcon v-if="loading">
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<LoadingOutlined spin />
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</template>
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<template #notFoundContent v-if="loading">
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<span>
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<LoadingOutlined spin class="mr-1" />
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{{ t('component.form.apiSelectNotFound') }}
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</span>
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</template>
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</a-cascader>
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</template>
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<script lang="ts">
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import { type Recordable } from '@vben/types';
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import { defineComponent, PropType, ref, unref, watch, watchEffect } from 'vue';
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import { Cascader } from 'ant-design-vue';
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import { propTypes } from '/@/utils/propTypes';
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import { isFunction } from '/@/utils/is';
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import { get, omit } from 'lodash-es';
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import { useRuleFormItem } from '/@/hooks/component/useFormItem';
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import { LoadingOutlined } from '@ant-design/icons-vue';
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import { useI18n } from '/@/hooks/web/useI18n';
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interface Option {
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value: string;
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label: string;
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loading?: boolean;
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isLeaf?: boolean;
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children?: Option[];
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}
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export default defineComponent({
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name: 'ApiCascader',
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components: {
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LoadingOutlined,
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[Cascader.name]: Cascader,
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},
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props: {
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value: {
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type: Array,
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},
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api: {
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type: Function as PropType<(arg?: Recordable<any>) => Promise<Option[]>>,
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default: null,
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},
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numberToString: propTypes.bool,
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resultField: propTypes.string.def(''),
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labelField: propTypes.string.def('label'),
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valueField: propTypes.string.def('value'),
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childrenField: propTypes.string.def('children'),
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asyncFetchParamKey: propTypes.string.def('parentCode'),
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immediate: propTypes.bool.def(true),
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// init fetch params
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initFetchParams: {
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type: Object as PropType<Recordable<any>>,
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default: () => ({}),
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},
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// 是否有下级，默认是
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isLeaf: {
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type: Function as PropType<(arg: Recordable<any>) => boolean>,
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default: null,
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},
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displayRenderArray: {
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type: Array,
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},
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},
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emits: ['change', 'defaultChange'],
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setup(props, { emit }) {
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const apiData = ref<any[]>([]);
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const options = ref<Option[]>([]);
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const loading = ref<boolean>(false);
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const emitData = ref<any[]>([]);
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const isFirstLoad = ref(true);
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const { t } = useI18n();
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// Embedded in the form, just use the hook binding to perform form verification
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const [state] = useRuleFormItem(props, 'value', 'change', emitData);
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watch(
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apiData,
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(data) => {
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const opts = generatorOptions(data);
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options.value = opts;
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},
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{ deep: true },
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);
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function generatorOptions(options: any[]): Option[] {
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const { labelField, valueField, numberToString, childrenField, isLeaf } = props;
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return options.reduce((prev, next: Recordable<any>) => {
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if (next) {
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const value = next[valueField];
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const item = {
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...omit(next, [labelField, valueField]),
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label: next[labelField],
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value: numberToString ? `${value}` : value,
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isLeaf: isLeaf && typeof isLeaf === 'function' ? isLeaf(next) : false,
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};
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const children = Reflect.get(next, childrenField);
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if (children) {
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Reflect.set(item, childrenField, generatorOptions(children));
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}
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prev.push(item);
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}
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return prev;
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}, [] as Option[]);
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}
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async function initialFetch() {
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const api = props.api;
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if (!api || !isFunction(api)) return;
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apiData.value = [];
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loading.value = true;
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try {
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const res = await api(props.initFetchParams);
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if (Array.isArray(res)) {
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apiData.value = res;
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return;
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}
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if (props.resultField) {
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apiData.value = get(res, props.resultField) || [];
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}
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} catch (error) {
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console.warn(error);
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} finally {
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loading.value = false;
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}
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}
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async function loadData(selectedOptions: Option[]) {
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const targetOption = selectedOptions[selectedOptions.length - 1];
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targetOption.loading = true;
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const api = props.api;
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if (!api || !isFunction(api)) return;
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try {
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const res = await api({
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[props.asyncFetchParamKey]: Reflect.get(targetOption, 'value'),
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});
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if (Array.isArray(res)) {
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const children = generatorOptions(res);
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targetOption.children = children;
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return;
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}
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if (props.resultField) {
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const children = generatorOptions(get(res, props.resultField) || []);
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targetOption.children = children;
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}
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} catch (e) {
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console.error(e);
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} finally {
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targetOption.loading = false;
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}
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}
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watchEffect(() => {
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props.immediate && initialFetch();
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});
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watch(
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() => props.initFetchParams,
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() => {
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!unref(isFirstLoad) && initialFetch();
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},
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{ deep: true },
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);
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function handleChange(keys, args) {
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emitData.value = args;
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emit('defaultChange', keys, args);
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}
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function handleRenderDisplay({ labels, selectedOptions }) {
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if (unref(emitData).length === selectedOptions.length) {
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return labels.join(' / ');
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}
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if (props.displayRenderArray) {
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return props.displayRenderArray.join(' / ');
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}
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return '';
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}
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return {
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state,
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options,
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loading,
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t,
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handleChange,
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loadData,
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handleRenderDisplay,
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};
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},
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});
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</script>
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