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// copy from element-plus |
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import { warn } from 'vue'; |
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import { fromPairs, isObject } from 'lodash-es'; |
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import type { ExtractPropTypes, PropType } from 'vue'; |
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import type { Mutable } from './types'; |
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const wrapperKey = Symbol(); |
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export type PropWrapper<T> = { [wrapperKey]: T }; |
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export const propKey = Symbol(); |
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type ResolveProp<T> = ExtractPropTypes<{ |
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key: { type: T; required: true }; |
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}>['key']; |
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type ResolvePropType<T> = ResolveProp<T> extends { type: infer V } ? V : ResolveProp<T>; |
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type ResolvePropTypeWithReadonly<T> = |
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Readonly<T> extends Readonly<Array<infer A>> ? ResolvePropType<A[]> : ResolvePropType<T>; |
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type IfUnknown<T, V> = [unknown] extends [T] ? V : T; |
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export type BuildPropOption<T, D extends BuildPropType<T, V, C>, R, V, C> = { |
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type?: T; |
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values?: readonly V[]; |
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required?: R; |
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default?: R extends true |
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? never |
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: D extends Record<string, unknown> | Array<any> |
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? () => D |
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: (() => D) | D; |
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validator?: ((val: any) => val is C) | ((val: any) => boolean); |
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}; |
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type _BuildPropType<T, V, C> = |
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| (T extends PropWrapper<unknown> |
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? T[typeof wrapperKey] |
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: [V] extends [never] |
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? ResolvePropTypeWithReadonly<T> |
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: never) |
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| V |
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| C; |
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export type BuildPropType<T, V, C> = _BuildPropType< |
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IfUnknown<T, never>, |
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IfUnknown<V, never>, |
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IfUnknown<C, never> |
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>; |
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type _BuildPropDefault<T, D> = [T] extends [ |
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// eslint-disable-next-line @typescript-eslint/ban-types |
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Record<string, unknown> | Array<any> | Function, |
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] |
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? D |
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: D extends () => T |
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? ReturnType<D> |
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: D; |
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export type BuildPropDefault<T, D, R> = R extends true |
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? { readonly default?: undefined } |
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: { |
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readonly default: Exclude<D, undefined> extends never |
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? undefined |
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: Exclude<_BuildPropDefault<T, D>, undefined>; |
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}; |
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export type BuildPropReturn<T, D, R, V, C> = { |
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readonly type: PropType<BuildPropType<T, V, C>>; |
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readonly required: IfUnknown<R, false>; |
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readonly validator: ((val: unknown) => boolean) | undefined; |
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[propKey]: true; |
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} & BuildPropDefault<BuildPropType<T, V, C>, IfUnknown<D, never>, IfUnknown<R, false>>; |
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/** |
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* @description Build prop. It can better optimize prop types |
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* @description 生成 prop,能更好地优化类型 |
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* @example |
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// limited options |
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// the type will be PropType<'light' | 'dark'> |
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buildProp({ |
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type: String, |
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values: ['light', 'dark'], |
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} as const) |
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* @example |
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// limited options and other types |
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// the type will be PropType<'small' | 'medium' | number> |
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buildProp({ |
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type: [String, Number], |
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values: ['small', 'medium'], |
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validator: (val: unknown): val is number => typeof val === 'number', |
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} as const) |
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@link see more: https://github.com/element-plus/element-plus/pull/3341 |
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*/ |
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export function buildProp< |
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T = never, |
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D extends BuildPropType<T, V, C> = never, |
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R extends boolean = false, |
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V = never, |
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C = never, |
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>(option: BuildPropOption<T, D, R, V, C>, key?: string): BuildPropReturn<T, D, R, V, C> { |
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// filter native prop type and nested prop, e.g `null`, `undefined` (from `buildProps`) |
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if (!isObject(option) || !!option[propKey]) return option as any; |
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const { values, required, default: defaultValue, type, validator } = option; |
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const _validator = |
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values || validator |
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? (val: unknown) => { |
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let valid = false; |
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let allowedValues: unknown[] = []; |
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if (values) { |
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allowedValues = [...values, defaultValue]; |
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valid ||= allowedValues.includes(val); |
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} |
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if (validator) valid ||= validator(val); |
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if (!valid && allowedValues.length > 0) { |
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const allowValuesText = [...new Set(allowedValues)] |
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.map((value) => JSON.stringify(value)) |
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.join(', '); |
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warn( |
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`Invalid prop: validation failed${ |
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key ? ` for prop "${key}"` : '' |
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}. Expected one of [${allowValuesText}], got value ${JSON.stringify(val)}.`, |
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); |
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} |
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return valid; |
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} |
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: undefined; |
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return { |
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type: |
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typeof type === 'object' && Object.getOwnPropertySymbols(type).includes(wrapperKey) && type |
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? type[wrapperKey] |
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: type, |
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required: !!required, |
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default: defaultValue, |
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validator: _validator, |
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[propKey]: true, |
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} as unknown as BuildPropReturn<T, D, R, V, C>; |
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} |
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type NativePropType = [((...args: any) => any) | { new (...args: any): any } | undefined | null]; |
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export const buildProps = < |
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O extends { |
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[K in keyof O]: O[K] extends BuildPropReturn<any, any, any, any, any> |
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? O[K] |
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: [O[K]] extends NativePropType |
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? O[K] |
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: O[K] extends BuildPropOption<infer T, infer D, infer R, infer V, infer C> |
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? D extends BuildPropType<T, V, C> |
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? BuildPropOption<T, D, R, V, C> |
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: never |
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: never; |
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}, |
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>( |
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props: O, |
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) => |
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fromPairs( |
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Object.entries(props).map(([key, option]) => [key, buildProp(option as any, key)]), |
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) as unknown as { |
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[K in keyof O]: O[K] extends { [propKey]: boolean } |
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? O[K] |
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: [O[K]] extends NativePropType |
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? O[K] |
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: O[K] extends BuildPropOption< |
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infer T, |
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// eslint-disable-next-line @typescript-eslint/no-unused-vars |
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infer _D, |
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infer R, |
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infer V, |
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infer C |
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> |
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? BuildPropReturn<T, O[K]['default'], R, V, C> |
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: never; |
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}; |
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export const definePropType = <T>(val: any) => ({ [wrapperKey]: val }) as PropWrapper<T>; |
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export const keyOf = <T extends object>(arr: T) => Object.keys(arr) as Array<keyof T>; |
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export const mutable = <T extends readonly any[] | Record<string, unknown>>(val: T) => |
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val as Mutable<typeof val>; |
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export const componentSize = ['large', 'medium', 'small', 'mini'] as const; |