@opra/nestjs/opra-nest-utils.js

Opra NestJS module

const GUARDS_METADATA = '__guards__';
const INTERCEPTORS_METADATA = '__interceptors__';
const EXCEPTION_FILTERS_METADATA = '__exceptionFilters__';
/**
 * Utility class for Opra-NestJS integration.
 */
export class OpraNestUtils {
    /**
     * Copies Opra-related decorator metadata from source classes to a target class.
     * Also merges NestJS guards, interceptors, and exception filters.
     *
     * @param target - The target class to receive the metadata.
     * @param source - The source classes to copy metadata from.
     */
    static copyDecoratorMetadata(target, ...source) {
        for (const parent of source) {
            const metadataKeys = Reflect.getOwnMetadataKeys(parent);
            for (const key of metadataKeys) {
                if (typeof key === 'string' &&
                    key.startsWith('opra.') &&
                    !Reflect.hasOwnMetadata(key, target)) {
                    const metadata = Reflect.getMetadata(key, parent);
                    Reflect.defineMetadata(key, metadata, target);
                    continue;
                }
                if (key === GUARDS_METADATA ||
                    key === INTERCEPTORS_METADATA ||
                    key === EXCEPTION_FILTERS_METADATA) {
                    const m1 = Reflect.getMetadata(key, target) || [];
                    const metadata = [...m1];
                    const m2 = Reflect.getOwnMetadata(key, parent) || [];
                    m2.forEach((t) => {
                        if (!metadata.includes(t)) {
                            metadata.push(t);
                        }
                    });
                    Reflect.defineMetadata(key, metadata, target);
                }
            }
        }
    }
}