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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.ContextIdFactory = exports.createContextId = void 0;
const shared_utils_1 = require("@nestjs/common/utils/shared.utils");
const request_constants_1 = require("../router/request/request-constants");
function createContextId() {
/**
* We are generating random identifier to track asynchronous
* execution context. An identifier does not have to be neither unique
* nor unpredictable because WeakMap uses objects as keys (reference comparison).
* Thus, even though identifier number might be equal, WeakMap would properly
* associate asynchronous context with its internal map values using object reference.
* Object is automatically removed once request has been processed (closure).
*/
return { id: Math.random() };
}
exports.createContextId = createContextId;
class ContextIdFactory {
/**
* Generates a context identifier based on the request object.
*/
static create() {
return createContextId();
}
/**
* Generates a random identifier to track asynchronous execution context.
* @param request request object
*/
static getByRequest(request, propsToInspect = ['raw']) {
if (!request) {
return ContextIdFactory.create();
}
if (request[request_constants_1.REQUEST_CONTEXT_ID]) {
return request[request_constants_1.REQUEST_CONTEXT_ID];
}
for (const key of propsToInspect) {
if (request[key]?.[request_constants_1.REQUEST_CONTEXT_ID]) {
return request[key][request_constants_1.REQUEST_CONTEXT_ID];
}
}
if (!this.strategy) {
return ContextIdFactory.create();
}
const contextId = createContextId();
const resolverObjectOrFunction = this.strategy.attach(contextId, request);
if (this.isContextIdResolverWithPayload(resolverObjectOrFunction)) {
contextId.getParent = resolverObjectOrFunction.resolve;
contextId.payload = resolverObjectOrFunction.payload;
}
else {
contextId.getParent = resolverObjectOrFunction;
}
return contextId;
}
/**
* Registers a custom context id strategy that lets you attach
* a parent context id to the existing context id object.
* @param strategy strategy instance
*/
static apply(strategy) {
this.strategy = strategy;
}
static isContextIdResolverWithPayload(resolverOrResolverFn) {
return (0, shared_utils_1.isObject)(resolverOrResolverFn);
}
}
exports.ContextIdFactory = ContextIdFactory;