@nestjs/graphql/dist/utils/extract-metadata.util.js

Nest - modern, fast, powerful node.js web framework (@graphql)

import 'reflect-metadata';
import { RESOLVER_NAME_METADATA, RESOLVER_PROPERTY_METADATA, RESOLVER_REFERENCE_KEY, RESOLVER_REFERENCE_METADATA, RESOLVER_TYPE_METADATA, } from '../graphql.constants.js';
export function extractMetadata(instance, prototype, methodName, filterPredicate) {
    const callback = prototype[methodName];
    const resolverType = Reflect.getMetadata(RESOLVER_TYPE_METADATA, callback) ||
        Reflect.getMetadata(RESOLVER_TYPE_METADATA, instance.constructor);
    const isPropertyResolver = !!Reflect.getMetadata(RESOLVER_PROPERTY_METADATA, callback);
    const resolverName = Reflect.getMetadata(RESOLVER_NAME_METADATA, callback);
    const isReferenceResolver = !!Reflect.getMetadata(RESOLVER_REFERENCE_METADATA, callback);
    if (filterPredicate(resolverType, isReferenceResolver, isPropertyResolver)) {
        return null;
    }
    const name = isReferenceResolver
        ? RESOLVER_REFERENCE_KEY
        : resolverName || methodName;
    return {
        type: resolverType,
        methodName,
        name,
    };
}