@matatbread/typia/lib/programmers/internal/json_schema_discriminator.mjs

Superfast runtime validators with only one line

import { UnionPredicator } from '../helpers/UnionPredicator.mjs';

const json_schema_discriminator = (metadata) => {
    if (metadata.size() === 0 ||
        metadata.size() !== metadata.objects.length ||
        metadata.objects.some((o) => o.type.isLiteral()) === true)
        return undefined;
    const specialized = UnionPredicator.object(metadata.objects.map((o) => o.type));
    const meet = specialized.length === metadata.objects.length &&
        specialized.every((s) => s.property.key.isSoleLiteral() && s.property.value.isSoleLiteral()) &&
        new Set(specialized.map((s) => s.property.key.getSoleLiteral())).size === 1;
    if (meet === false)
        return undefined;
    return {
        propertyName: specialized[0].property.key.getSoleLiteral(),
        mapping: Object.fromEntries(specialized.map((s) => [
            s.property.value.getSoleLiteral(),
            `#/components/schemas/${s.object.name}`,
        ])),
    };
};

export { json_schema_discriminator };
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