@nestjs/graphql/dist/decorators/resolvers.utils.js

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

import { SetMetadata } from '@nestjs/common';
import { isFunction, isString } from '@nestjs/common/utils/shared.utils.js';
import { RESOLVER_NAME_METADATA, RESOLVER_TYPE_METADATA, } from '../graphql.constants.js';
import { UndefinedResolverTypeError } from '../schema-builder/errors/undefined-resolver-type.error.js';
export function addResolverMetadata(resolver, name, target, key, descriptor) {
    SetMetadata(RESOLVER_TYPE_METADATA, resolver || name)(target, key, descriptor);
    SetMetadata(RESOLVER_NAME_METADATA, name)(target, key, descriptor);
}
export function getClassName(nameOrType) {
    if (isString(nameOrType)) {
        return nameOrType;
    }
    const classOrUndefined = getClassOrUndefined(nameOrType);
    return classOrUndefined && classOrUndefined.name;
}
export function getResolverTypeFn(nameOrType, target) {
    return nameOrType
        ? nameOrType.prototype
            ? () => nameOrType
            : nameOrType
        : () => {
            throw new UndefinedResolverTypeError(target.name);
        };
}
export function getClassOrUndefined(typeOrFunc) {
    return isConstructor(typeOrFunc)
        ? typeOrFunc
        : isFunction(typeOrFunc)
            ? typeOrFunc()
            : undefined;
}
function isConstructor(obj) {
    return (!!obj.prototype &&
        !!obj.prototype.constructor &&
        !!obj.prototype.constructor.name);
}