typia/src/factories/internal/metadata/iterate_metadata_alias.ts

Superfast runtime validators with only one line

import ts from "typescript";

import { Metadata } from "../../../schemas/metadata/Metadata";
import { MetadataAlias } from "../../../schemas/metadata/MetadataAlias";

import { ArrayUtil } from "../../../utils/ArrayUtil";

import { MetadataCollection } from "../../MetadataCollection";
import { MetadataFactory } from "../../MetadataFactory";
import { emplace_metadata_alias } from "./emplace_metadata_alias";

export const iterate_metadata_alias =
  (checker: ts.TypeChecker) =>
  (options: MetadataFactory.IOptions) =>
  (collection: MetadataCollection) =>
  (errors: MetadataFactory.IError[]) =>
  (
    meta: Metadata,
    type: ts.Type,
    explore: MetadataFactory.IExplore,
  ): boolean => {
    if (options.absorb !== false || type.aliasSymbol === undefined)
      return false;

    const node: ts.Declaration | undefined = type.aliasSymbol.declarations?.[0];
    if (node === undefined) return false;

    // CONSTRUCT DEFINITION
    const alias: MetadataAlias = emplace_metadata_alias(checker)(options)(
      collection,
    )(errors)(type, meta.nullable, explore);
    ArrayUtil.add(meta.aliases, alias, (elem) => elem.name === alias.name);
    return true;
  };