@juspay/neurolink/dist/lib/auth/RequestContext.js

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// src/lib/auth/RequestContext.ts
/**
 * Type-safe Map wrapper for request-scoped context.
 * Flows from auth middleware through generate/stream/tools/memory.
 * Reserved keys (prefixed neurolink__) cannot be overridden by client code.
 */
export const NEUROLINK_RESOURCE_ID_KEY = "neurolink__resourceId";
export const NEUROLINK_THREAD_ID_KEY = "neurolink__threadId";
const RESERVED_PREFIX = "neurolink__";
export class RequestContext {
    registry = new Map();
    constructor(initial) {
        if (Array.isArray(initial)) {
            for (const [key, value] of initial) {
                this.registry.set(key, value);
            }
        }
        else if (initial) {
            for (const [key, value] of Object.entries(initial)) {
                this.registry.set(key, value);
            }
        }
    }
    set(key, value) {
        this.registry.set(key, value);
    }
    get(key) {
        return this.registry.get(key);
    }
    has(key) {
        return this.registry.has(key);
    }
    delete(key) {
        return this.registry.delete(key);
    }
    get size() {
        return this.registry.size;
    }
    /**
     * Merge client-provided values, but SKIP reserved keys that are already set.
     * This prevents clients from overriding auth middleware values.
     */
    mergeClientContext(clientContext) {
        for (const [key, value] of Object.entries(clientContext)) {
            if (key.startsWith(RESERVED_PREFIX) && this.registry.has(key)) {
                continue; // Server-set reserved keys cannot be overridden
            }
            if (!this.registry.has(key)) {
                this.registry.set(key, value);
            }
        }
    }
    toJSON() {
        const result = {};
        for (const [key, value] of this.registry.entries()) {
            if (this.isSerializable(value)) {
                result[key] = value;
            }
        }
        return result;
    }
    isSerializable(value) {
        if (value === null || value === undefined) {
            return true;
        }
        const type = typeof value;
        if (type === "function" || type === "symbol") {
            return false;
        }
        try {
            JSON.stringify(value);
            return true;
        }
        catch {
            return false;
        }
    }
}
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