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Fix #8535 Excessive stack ... 'SchemaTypeDef<?>' (#8547)

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* Fix #8535 Excessive stack ... 'SchemaTypeDef<?>'

Co-authored-by: acid-chicken <root@acid-chicken.com>

* add comment

* clean up

Co-authored-by: acid-chicken <root@acid-chicken.com>
This commit is contained in:
tamaina 2022-04-27 10:49:00 +09:00 committed by GitHub
parent b9e3267198
commit 065324d30b
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1 changed files with 20 additions and 15 deletions
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29
packages/backend/src/misc/schema.ts
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@ -98,6 +98,9 @@ export interface Schema extends OfSchema {
readonly default?: (this['type'] extends TypeStringef ? StringDefToType<this['type']> : any) | null;
readonly maxLength?: number;
readonly minLength?: number;
readonly maximum?: number;
readonly minimum?: number;
readonly pattern?: string;
}
type RequiredPropertyNames<s extends Obj> = {
@ -105,24 +108,26 @@ type RequiredPropertyNames<s extends Obj> = {
// K is not optional
s[K]['optional'] extends false ? K :
// K has default value
s[K]['default'] extends null | string | number | boolean | Record<string, unknown> ? K : never
s[K]['default'] extends null | string | number | boolean | Record<string, unknown> ? K :
never
}[keyof s];
export interface Obj { [key: string]: Schema; }
export type Obj = Record<string, Schema>;
// https://github.com/misskey-dev/misskey/issues/8535
// To avoid excessive stack depth error,
// deceive TypeScript with UnionToIntersection (or more precisely, `infer` expression within it).
export type ObjType<s extends Obj, RequiredProps extends keyof s> =
{ -readonly [P in keyof s]?: SchemaType<s[P]> } &
{ -readonly [P in RequiredProps]: SchemaType<s[P]> } &
{ -readonly [P in RequiredPropertyNames<s>]: SchemaType<s[P]> };
UnionToIntersection<
{ -readonly [R in RequiredPropertyNames<s>]-?: SchemaType<s[R]> } &
{ -readonly [R in RequiredProps]-?: SchemaType<s[R]> } &
{ -readonly [P in keyof s]?: SchemaType<s[P]> }
>;
type NullOrUndefined<p extends Schema, T> =
p['nullable'] extends true
? p['optional'] extends true
? (T | null | undefined)
: (T | null)
: p['optional'] extends true
? (T | undefined)
: T;
| (p['nullable'] extends true ? null : never)
| (p['optional'] extends true ? undefined : never)
| T;
// https://stackoverflow.com/questions/54938141/typescript-convert-union-to-intersection
// Get intersection from union