@ng-web-apis/workers/fesm2022/ng-web-apis-workers.mjs.map

A library for comfortable use of Web Workers API in Angular

{"version":3,"file":"ng-web-apis-workers.mjs","sources":["../../../libs/workers/src/worker/consts/worker-fn-template.ts","../../../libs/workers/src/worker/classes/web-worker.ts","../../../libs/workers/src/worker/operators/to-data.ts","../../../libs/workers/src/worker/pipes/worker.pipe.ts","../../../libs/workers/src/ng-web-apis-workers.ts"],"sourcesContent":["// throw an error using the `setTimeout` function\n// because web worker doesn't emit ErrorEvent from promises\nexport const WORKER_BLANK_FN = `\nfunction(fn){\n    function isFunction(type){\n        return type === 'function';\n    }\n\n    self.addEventListener('message', function(e) {\n        var result = fn.call(null, e.data);\n        if (result && [typeof result.then, typeof result.catch].every(isFunction)){\n            result\n                .then(postMessage)\n                .catch(function(error) {\n                    setTimeout(function(){throw error}, 0)\n                })\n        } else {\n            postMessage(result);\n        }\n    })\n}\n`;\n","import {EMPTY, fromEvent, merge, Observable, Subject, take, takeUntil, tap} from 'rxjs';\n\nimport {WORKER_BLANK_FN} from '../consts/worker-fn-template';\nimport type {TypedMessageEvent} from '../types/typed-message-event';\nimport type {WorkerFunction} from '../types/worker-function';\n\nexport class WebWorker<T = any, R = any> extends Observable<TypedMessageEvent<R>> {\n    private readonly worker: Worker | undefined;\n    private readonly url: string;\n    private readonly destroy$: Subject<void>;\n\n    constructor(url: string, options?: WorkerOptions) {\n        let worker: Worker | undefined;\n        let error: any;\n\n        try {\n            worker = new Worker(url, options);\n        } catch (e) {\n            error = e;\n        }\n\n        super((subscriber) => {\n            let eventStream$: Observable<ErrorEvent | TypedMessageEvent<R>> = EMPTY;\n\n            if (error) {\n                subscriber.error(error);\n            } else if (this.destroy$.isStopped) {\n                subscriber.complete();\n            } else if (worker) {\n                eventStream$ = merge(\n                    fromEvent<TypedMessageEvent<R>>(worker, 'message').pipe(\n                        tap((event) => subscriber.next(event)),\n                    ),\n                    fromEvent<ErrorEvent>(worker, 'error').pipe(\n                        tap((event) => subscriber.error(event)),\n                    ),\n                ).pipe(takeUntil(this.destroy$));\n            }\n\n            eventStream$.subscribe().add(subscriber);\n        });\n\n        this.worker = worker;\n        this.url = url;\n        this.destroy$ = new Subject<void>();\n    }\n\n    public static fromFunction<T, R>(\n        fn: WorkerFunction<T, R>,\n        options?: WorkerOptions,\n    ): WebWorker<T, R> {\n        return new WebWorker<T, R>(WebWorker.createFnUrl(fn), options);\n    }\n\n    public static async execute<T, R>(\n        fn: WorkerFunction<T, R>,\n        data: T,\n    ): Promise<TypedMessageEvent<R>> {\n        const worker = WebWorker.fromFunction(fn);\n        // eslint-disable-next-line rxjs/no-topromise\n        const promise = worker.pipe(take(1)).toPromise();\n\n        worker.postMessage(data);\n\n        return promise.then((result) => {\n            worker.terminate();\n\n            return result as unknown as TypedMessageEvent<R>;\n        });\n    }\n\n    private static createFnUrl(fn: WorkerFunction): string {\n        const script = `(${WORKER_BLANK_FN})(${fn});`;\n\n        const blob = new Blob([script], {type: 'text/javascript'});\n\n        return URL.createObjectURL(blob);\n    }\n\n    public terminate(): void {\n        if (this.destroy$.isStopped) {\n            return;\n        }\n\n        if (this.worker) {\n            this.worker.terminate();\n        }\n\n        URL.revokeObjectURL(this.url);\n\n        this.destroy$.next();\n        this.destroy$.complete();\n    }\n\n    public postMessage(value: T): void {\n        if (this.worker) {\n            this.worker.postMessage(value);\n        }\n    }\n}\n","import type {OperatorFunction} from 'rxjs';\nimport {map} from 'rxjs';\n\nimport type {TypedMessageEvent} from '../types/typed-message-event';\n\nexport function toData<T>(): OperatorFunction<TypedMessageEvent<T>, T> {\n    return map<TypedMessageEvent<T>, T>(({data}) => data);\n}\n","import type {OnDestroy, PipeTransform} from '@angular/core';\nimport {Pipe} from '@angular/core';\nimport type {Observable} from 'rxjs';\n\nimport {WebWorker} from '../classes/web-worker';\nimport {toData} from '../operators/to-data';\nimport type {WorkerFunction} from '../types/worker-function';\n\n@Pipe({\n    standalone: true,\n    name: 'waWorker',\n})\nexport class WorkerPipe implements PipeTransform, OnDestroy {\n    private fn!: WorkerFunction;\n    private worker!: WebWorker;\n    private observer!: Observable<any>;\n\n    public transform<T, R>(value: T, fn: WorkerFunction<T, R>): Observable<R> {\n        if (this.fn !== fn) {\n            this.terminateWorker();\n            this.initNewWorker(fn);\n        }\n\n        this.worker.postMessage(value);\n\n        return this.observer;\n    }\n\n    public ngOnDestroy(): void {\n        this.terminateWorker();\n    }\n\n    private terminateWorker(): void {\n        if (this.worker) {\n            this.worker.terminate();\n        }\n    }\n\n    private initNewWorker<T, R>(fn: WorkerFunction<T, R>): void {\n        this.fn = fn;\n        this.worker = WebWorker.fromFunction(fn);\n        this.observer = this.worker.pipe(toData());\n    }\n}\n","/**\n * Generated bundle index. 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