@sudowealth/schwab-api/dist/src/middleware/middleware-metadata.js

TypeScript client for Charles Schwab API with OAuth support, market data, trading functionality, and complete type safety

import { createLogger } from '../utils/secure-logger';
const logger = createLogger('MiddlewareMetadata');
/**
 * Symbol used to store middleware metadata on Request and Response objects
 */
const MIDDLEWARE_METADATA = Symbol('MIDDLEWARE_METADATA');
/**
 * Gets middleware metadata from a Request or Response
 * Creates an empty object if no metadata exists yet
 */
export function getMetadata(obj) {
    // Check if the object is extensible and has the symbol property already
    if (Object.getOwnPropertySymbols(obj).includes(MIDDLEWARE_METADATA)) {
        return obj[MIDDLEWARE_METADATA];
    }
    // Create new metadata object
    const metadata = {};
    try {
        // Try to set the symbol property on the object
        Object.defineProperty(obj, MIDDLEWARE_METADATA, {
            value: metadata,
            enumerable: false,
            writable: true,
        });
    }
    catch (e) {
        // If we can't modify the object (e.g., frozen objects), log a warning
        logger.warn('Could not attach metadata to object, some middleware coordination might not work properly. Error:', e?.message || e);
    }
    return metadata;
}
/**
 * Creates a new Request with the metadata from the original
 * Useful when you need to clone a request but maintain its metadata
 */
export function cloneRequestWithMetadata(req) {
    const newReq = new Request(req.url, req);
    const metadata = getMetadata(req);
    Object.defineProperty(newReq, MIDDLEWARE_METADATA, {
        value: { ...metadata },
        enumerable: false,
        writable: true,
    });
    return newReq;
}