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67 lines
3.1 KiB
Plaintext
67 lines
3.1 KiB
Plaintext
import { CreateType } from '../create/type.mjs';
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import { Discard } from '../discard/discard.mjs';
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import { Computed } from '../computed/index.mjs';
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import { Intersect } from '../intersect/index.mjs';
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import { Literal } from '../literal/index.mjs';
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import { Object } from '../object/index.mjs';
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import { Union } from '../union/index.mjs';
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import { IndexPropertyKeys } from '../indexed/index.mjs';
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import { TransformKind } from '../symbols/symbols.mjs';
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// ------------------------------------------------------------------
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// Guards
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// ------------------------------------------------------------------
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import { IsMappedKey, IsMappedResult, IsIntersect, IsUnion, IsObject, IsSchema, IsLiteralValue, IsRef } from '../guard/kind.mjs';
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import { IsArray as IsArrayValue } from '../guard/value.mjs';
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// ------------------------------------------------------------------
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// Infrastructure
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// ------------------------------------------------------------------
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import { PickFromMappedKey } from './pick-from-mapped-key.mjs';
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import { PickFromMappedResult } from './pick-from-mapped-result.mjs';
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function FromIntersect(types, propertyKeys) {
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return types.map((type) => PickResolve(type, propertyKeys));
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}
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// prettier-ignore
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function FromUnion(types, propertyKeys) {
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return types.map((type) => PickResolve(type, propertyKeys));
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}
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// prettier-ignore
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function FromProperties(properties, propertyKeys) {
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const result = {};
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for (const K2 of propertyKeys)
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if (K2 in properties)
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result[K2] = properties[K2];
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return result;
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}
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// prettier-ignore
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function FromObject(T, K) {
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const options = Discard(T, [TransformKind, '$id', 'required', 'properties']);
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const properties = FromProperties(T['properties'], K);
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return Object(properties, options);
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}
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// prettier-ignore
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function UnionFromPropertyKeys(propertyKeys) {
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const result = propertyKeys.reduce((result, key) => IsLiteralValue(key) ? [...result, Literal(key)] : result, []);
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return Union(result);
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}
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// prettier-ignore
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function PickResolve(properties, propertyKeys) {
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return (IsIntersect(properties) ? Intersect(FromIntersect(properties.allOf, propertyKeys)) :
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IsUnion(properties) ? Union(FromUnion(properties.anyOf, propertyKeys)) :
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IsObject(properties) ? FromObject(properties, propertyKeys) :
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Object({}));
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}
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/** `[Json]` Constructs a type whose keys are picked from the given type */
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// prettier-ignore
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export function Pick(type, key, options) {
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const typeKey = IsArrayValue(key) ? UnionFromPropertyKeys(key) : key;
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const propertyKeys = IsSchema(key) ? IndexPropertyKeys(key) : key;
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const isTypeRef = IsRef(type);
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const isKeyRef = IsRef(key);
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return (IsMappedResult(type) ? PickFromMappedResult(type, propertyKeys, options) :
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IsMappedKey(key) ? PickFromMappedKey(type, key, options) :
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(isTypeRef && isKeyRef) ? Computed('Pick', [type, typeKey], options) :
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(!isTypeRef && isKeyRef) ? Computed('Pick', [type, typeKey], options) :
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(isTypeRef && !isKeyRef) ? Computed('Pick', [type, typeKey], options) :
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CreateType({ ...PickResolve(type, propertyKeys), ...options }));
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}
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