52 lines
1.6 KiB
TypeScript
52 lines
1.6 KiB
TypeScript
import type { Ref } from 'vue';
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import { shallowRef, watchEffect } from 'vue';
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import type { FieldNames, RawValueType } from '../Select';
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import { convertChildrenToData } from '../utils/legacyUtil';
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/**
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* Parse `children` to `options` if `options` is not provided.
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* Then flatten the `options`.
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*/
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export default function useOptions<OptionType>(
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options: Ref<OptionType[]>,
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children: Ref<any>,
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fieldNames: Ref<FieldNames>,
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) {
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const mergedOptions = shallowRef();
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const valueOptions = shallowRef();
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const labelOptions = shallowRef();
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watchEffect(() => {
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let newOptions = options.value;
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const childrenAsData = !options.value;
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if (childrenAsData) {
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newOptions = convertChildrenToData(children.value);
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}
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const newValueOptions = new Map<RawValueType, OptionType>();
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const newLabelOptions = new Map<any, OptionType>();
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function dig(optionList: OptionType[], isChildren = false) {
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// for loop to speed up collection speed
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for (let i = 0; i < optionList.length; i += 1) {
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const option = optionList[i];
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if (!option[fieldNames.value.options] || isChildren) {
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newValueOptions.set(option[fieldNames.value.value], option);
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newLabelOptions.set(option[fieldNames.value.label], option);
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} else {
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dig(option[fieldNames.value.options], true);
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}
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}
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}
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dig(newOptions);
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mergedOptions.value = newOptions;
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valueOptions.value = newValueOptions;
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labelOptions.value = newLabelOptions;
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});
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return {
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options: mergedOptions,
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valueOptions,
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labelOptions,
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};
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}
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