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| // src/Interceptor.ts | |
| import { Logger } from "@open-draft/logger"; | |
| import { Emitter } from "strict-event-emitter"; | |
| var INTERNAL_REQUEST_ID_HEADER_NAME = "x-interceptors-internal-request-id"; | |
| function getGlobalSymbol(symbol) { | |
| return ( | |
| // @ts-ignore https://github.com/Microsoft/TypeScript/issues/24587 | |
| globalThis[symbol] || void 0 | |
| ); | |
| } | |
| function setGlobalSymbol(symbol, value) { | |
| globalThis[symbol] = value; | |
| } | |
| function deleteGlobalSymbol(symbol) { | |
| delete globalThis[symbol]; | |
| } | |
| var InterceptorReadyState = /* @__PURE__ */ ((InterceptorReadyState2) => { | |
| InterceptorReadyState2["INACTIVE"] = "INACTIVE"; | |
| InterceptorReadyState2["APPLYING"] = "APPLYING"; | |
| InterceptorReadyState2["APPLIED"] = "APPLIED"; | |
| InterceptorReadyState2["DISPOSING"] = "DISPOSING"; | |
| InterceptorReadyState2["DISPOSED"] = "DISPOSED"; | |
| return InterceptorReadyState2; | |
| })(InterceptorReadyState || {}); | |
| var Interceptor = class { | |
| constructor(symbol) { | |
| this.symbol = symbol; | |
| this.readyState = "INACTIVE" /* INACTIVE */; | |
| this.emitter = new Emitter(); | |
| this.subscriptions = []; | |
| this.logger = new Logger(symbol.description); | |
| this.emitter.setMaxListeners(0); | |
| this.logger.info("constructing the interceptor..."); | |
| } | |
| /** | |
| * Determine if this interceptor can be applied | |
| * in the current environment. | |
| */ | |
| checkEnvironment() { | |
| return true; | |
| } | |
| /** | |
| * Apply this interceptor to the current process. | |
| * Returns an already running interceptor instance if it's present. | |
| */ | |
| apply() { | |
| const logger = this.logger.extend("apply"); | |
| logger.info("applying the interceptor..."); | |
| if (this.readyState === "APPLIED" /* APPLIED */) { | |
| logger.info("intercepted already applied!"); | |
| return; | |
| } | |
| const shouldApply = this.checkEnvironment(); | |
| if (!shouldApply) { | |
| logger.info("the interceptor cannot be applied in this environment!"); | |
| return; | |
| } | |
| this.readyState = "APPLYING" /* APPLYING */; | |
| const runningInstance = this.getInstance(); | |
| if (runningInstance) { | |
| logger.info("found a running instance, reusing..."); | |
| this.on = (event, listener) => { | |
| logger.info('proxying the "%s" listener', event); | |
| runningInstance.emitter.addListener(event, listener); | |
| this.subscriptions.push(() => { | |
| runningInstance.emitter.removeListener(event, listener); | |
| logger.info('removed proxied "%s" listener!', event); | |
| }); | |
| return this; | |
| }; | |
| this.readyState = "APPLIED" /* APPLIED */; | |
| return; | |
| } | |
| logger.info("no running instance found, setting up a new instance..."); | |
| this.setup(); | |
| this.setInstance(); | |
| this.readyState = "APPLIED" /* APPLIED */; | |
| } | |
| /** | |
| * Setup the module augments and stubs necessary for this interceptor. | |
| * This method is not run if there's a running interceptor instance | |
| * to prevent instantiating an interceptor multiple times. | |
| */ | |
| setup() { | |
| } | |
| /** | |
| * Listen to the interceptor's public events. | |
| */ | |
| on(event, listener) { | |
| const logger = this.logger.extend("on"); | |
| if (this.readyState === "DISPOSING" /* DISPOSING */ || this.readyState === "DISPOSED" /* DISPOSED */) { | |
| logger.info("cannot listen to events, already disposed!"); | |
| return this; | |
| } | |
| logger.info('adding "%s" event listener:', event, listener); | |
| this.emitter.on(event, listener); | |
| return this; | |
| } | |
| once(event, listener) { | |
| this.emitter.once(event, listener); | |
| return this; | |
| } | |
| off(event, listener) { | |
| this.emitter.off(event, listener); | |
| return this; | |
| } | |
| removeAllListeners(event) { | |
| this.emitter.removeAllListeners(event); | |
| return this; | |
| } | |
| /** | |
| * Disposes of any side-effects this interceptor has introduced. | |
| */ | |
| dispose() { | |
| const logger = this.logger.extend("dispose"); | |
| if (this.readyState === "DISPOSED" /* DISPOSED */) { | |
| logger.info("cannot dispose, already disposed!"); | |
| return; | |
| } | |
| logger.info("disposing the interceptor..."); | |
| this.readyState = "DISPOSING" /* DISPOSING */; | |
| if (!this.getInstance()) { | |
| logger.info("no interceptors running, skipping dispose..."); | |
| return; | |
| } | |
| this.clearInstance(); | |
| logger.info("global symbol deleted:", getGlobalSymbol(this.symbol)); | |
| if (this.subscriptions.length > 0) { | |
| logger.info("disposing of %d subscriptions...", this.subscriptions.length); | |
| for (const dispose of this.subscriptions) { | |
| dispose(); | |
| } | |
| this.subscriptions = []; | |
| logger.info("disposed of all subscriptions!", this.subscriptions.length); | |
| } | |
| this.emitter.removeAllListeners(); | |
| logger.info("destroyed the listener!"); | |
| this.readyState = "DISPOSED" /* DISPOSED */; | |
| } | |
| getInstance() { | |
| var _a; | |
| const instance = getGlobalSymbol(this.symbol); | |
| this.logger.info("retrieved global instance:", (_a = instance == null ? void 0 : instance.constructor) == null ? void 0 : _a.name); | |
| return instance; | |
| } | |
| setInstance() { | |
| setGlobalSymbol(this.symbol, this); | |
| this.logger.info("set global instance!", this.symbol.description); | |
| } | |
| clearInstance() { | |
| deleteGlobalSymbol(this.symbol); | |
| this.logger.info("cleared global instance!", this.symbol.description); | |
| } | |
| }; | |
| // src/createRequestId.ts | |
| function createRequestId() { | |
| return Math.random().toString(16).slice(2); | |
| } | |
| export { | |
| INTERNAL_REQUEST_ID_HEADER_NAME, | |
| getGlobalSymbol, | |
| deleteGlobalSymbol, | |
| InterceptorReadyState, | |
| Interceptor, | |
| createRequestId | |
| }; | |
| //# sourceMappingURL=chunk-QED3Q6Z2.mjs.map |