| Server IP : 167.235.224.122 / Your IP : 216.73.216.110 Web Server : Apache/2.4.58 (Ubuntu) System : Linux newplayground 6.8.0-136-generic #136-Ubuntu SMP PREEMPT_DYNAMIC Wed Jul 1 21:33:11 UTC 2026 aarch64 User : deploy ( 1000) PHP Version : 8.4.23 Disable Function : NONE MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : OFF Directory : /var/www/html/palimory/node_modules/rxjs/src/internal/ |
Upload File : |
import { PartialObserver, ObservableNotification, CompleteNotification, NextNotification, ErrorNotification } from './types';
import { Observable } from './Observable';
import { EMPTY } from './observable/empty';
import { of } from './observable/of';
import { throwError } from './observable/throwError';
import { isFunction } from './util/isFunction';
// TODO: When this enum is removed, replace it with a type alias. See #4556.
/**
* @deprecated Use a string literal instead. `NotificationKind` will be replaced with a type alias in v8.
* It will not be replaced with a const enum as those are not compatible with isolated modules.
*/
export enum NotificationKind {
NEXT = 'N',
ERROR = 'E',
COMPLETE = 'C',
}
/**
* Represents a push-based event or value that an {@link Observable} can emit.
* This class is particularly useful for operators that manage notifications,
* like {@link materialize}, {@link dematerialize}, {@link observeOn}, and
* others. Besides wrapping the actual delivered value, it also annotates it
* with metadata of, for instance, what type of push message it is (`next`,
* `error`, or `complete`).
*
* @see {@link materialize}
* @see {@link dematerialize}
* @see {@link observeOn}
* @deprecated It is NOT recommended to create instances of `Notification` directly.
* Rather, try to create POJOs matching the signature outlined in {@link ObservableNotification}.
* For example: `{ kind: 'N', value: 1 }`, `{ kind: 'E', error: new Error('bad') }`, or `{ kind: 'C' }`.
* Will be removed in v8.
*/
export class Notification<T> {
/**
* A value signifying that the notification will "next" if observed. In truth,
* This is really synonymous with just checking `kind === "N"`.
* @deprecated Will be removed in v8. Instead, just check to see if the value of `kind` is `"N"`.
*/
readonly hasValue: boolean;
/**
* Creates a "Next" notification object.
* @param kind Always `'N'`
* @param value The value to notify with if observed.
* @deprecated Internal implementation detail. Use {@link Notification#createNext createNext} instead.
*/
constructor(kind: 'N', value?: T);
/**
* Creates an "Error" notification object.
* @param kind Always `'E'`
* @param value Always `undefined`
* @param error The error to notify with if observed.
* @deprecated Internal implementation detail. Use {@link Notification#createError createError} instead.
*/
constructor(kind: 'E', value: undefined, error: any);
/**
* Creates a "completion" notification object.
* @param kind Always `'C'`
* @deprecated Internal implementation detail. Use {@link Notification#createComplete createComplete} instead.
*/
constructor(kind: 'C');
constructor(public readonly kind: 'N' | 'E' | 'C', public readonly value?: T, public readonly error?: any) {
this.hasValue = kind === 'N';
}
/**
* Executes the appropriate handler on a passed `observer` given the `kind` of notification.
* If the handler is missing it will do nothing. Even if the notification is an error, if
* there is no error handler on the observer, an error will not be thrown, it will noop.
* @param observer The observer to notify.
*/
observe(observer: PartialObserver<T>): void {
return observeNotification(this as ObservableNotification<T>, observer);
}
/**
* Executes a notification on the appropriate handler from a list provided.
* If a handler is missing for the kind of notification, nothing is called
* and no error is thrown, it will be a noop.
* @param next A next handler
* @param error An error handler
* @param complete A complete handler
* @deprecated Replaced with {@link Notification#observe observe}. Will be removed in v8.
*/
do(next: (value: T) => void, error: (err: any) => void, complete: () => void): void;
/**
* Executes a notification on the appropriate handler from a list provided.
* If a handler is missing for the kind of notification, nothing is called
* and no error is thrown, it will be a noop.
* @param next A next handler
* @param error An error handler
* @deprecated Replaced with {@link Notification#observe observe}. Will be removed in v8.
*/
do(next: (value: T) => void, error: (err: any) => void): void;
/**
* Executes the next handler if the Notification is of `kind` `"N"`. Otherwise
* this will not error, and it will be a noop.
* @param next The next handler
* @deprecated Replaced with {@link Notification#observe observe}. Will be removed in v8.
*/
do(next: (value: T) => void): void;
do(nextHandler: (value: T) => void, errorHandler?: (err: any) => void, completeHandler?: () => void): void {
const { kind, value, error } = this;
return kind === 'N' ? nextHandler?.(value!) : kind === 'E' ? errorHandler?.(error) : completeHandler?.();
}
/**
* Executes a notification on the appropriate handler from a list provided.
* If a handler is missing for the kind of notification, nothing is called
* and no error is thrown, it will be a noop.
* @param next A next handler
* @param error An error handler
* @param complete A complete handler
* @deprecated Replaced with {@link Notification#observe observe}. Will be removed in v8.
*/
accept(next: (value: T) => void, error: (err: any) => void, complete: () => void): void;
/**
* Executes a notification on the appropriate handler from a list provided.
* If a handler is missing for the kind of notification, nothing is called
* and no error is thrown, it will be a noop.
* @param next A next handler
* @param error An error handler
* @deprecated Replaced with {@link Notification#observe observe}. Will be removed in v8.
*/
accept(next: (value: T) => void, error: (err: any) => void): void;
/**
* Executes the next handler if the Notification is of `kind` `"N"`. Otherwise
* this will not error, and it will be a noop.
* @param next The next handler
* @deprecated Replaced with {@link Notification#observe observe}. Will be removed in v8.
*/
accept(next: (value: T) => void): void;
/**
* Executes the appropriate handler on a passed `observer` given the `kind` of notification.
* If the handler is missing it will do nothing. Even if the notification is an error, if
* there is no error handler on the observer, an error will not be thrown, it will noop.
* @param observer The observer to notify.
* @deprecated Replaced with {@link Notification#observe observe}. Will be removed in v8.
*/
accept(observer: PartialObserver<T>): void;
accept(nextOrObserver: PartialObserver<T> | ((value: T) => void), error?: (err: any) => void, complete?: () => void) {
return isFunction((nextOrObserver as any)?.next)
? this.observe(nextOrObserver as PartialObserver<T>)
: this.do(nextOrObserver as (value: T) => void, error as any, complete as any);
}
/**
* Returns a simple Observable that just delivers the notification represented
* by this Notification instance.
*
* @deprecated Will be removed in v8. To convert a `Notification` to an {@link Observable},
* use {@link of} and {@link dematerialize}: `of(notification).pipe(dematerialize())`.
*/
toObservable(): Observable<T> {
const { kind, value, error } = this;
// Select the observable to return by `kind`
const result =
kind === 'N'
? // Next kind. Return an observable of that value.
of(value!)
: //
kind === 'E'
? // Error kind. Return an observable that emits the error.
throwError(() => error)
: //
kind === 'C'
? // Completion kind. Kind is "C", return an observable that just completes.
EMPTY
: // Unknown kind, return falsy, so we error below.
0;
if (!result) {
// TODO: consider removing this check. The only way to cause this would be to
// use the Notification constructor directly in a way that is not type-safe.
// and direct use of the Notification constructor is deprecated.
throw new TypeError(`Unexpected notification kind ${kind}`);
}
return result;
}
private static completeNotification = new Notification('C') as Notification<never> & CompleteNotification;
/**
* A shortcut to create a Notification instance of the type `next` from a
* given value.
* @param value The `next` value.
* @return The "next" Notification representing the argument.
* @deprecated It is NOT recommended to create instances of `Notification` directly.
* Rather, try to create POJOs matching the signature outlined in {@link ObservableNotification}.
* For example: `{ kind: 'N', value: 1 }`, `{ kind: 'E', error: new Error('bad') }`, or `{ kind: 'C' }`.
* Will be removed in v8.
*/
static createNext<T>(value: T) {
return new Notification('N', value) as Notification<T> & NextNotification<T>;
}
/**
* A shortcut to create a Notification instance of the type `error` from a
* given error.
* @param err The `error` error.
* @return The "error" Notification representing the argument.
* @deprecated It is NOT recommended to create instances of `Notification` directly.
* Rather, try to create POJOs matching the signature outlined in {@link ObservableNotification}.
* For example: `{ kind: 'N', value: 1 }`, `{ kind: 'E', error: new Error('bad') }`, or `{ kind: 'C' }`.
* Will be removed in v8.
*/
static createError(err?: any) {
return new Notification('E', undefined, err) as Notification<never> & ErrorNotification;
}
/**
* A shortcut to create a Notification instance of the type `complete`.
* @return The valueless "complete" Notification.
* @deprecated It is NOT recommended to create instances of `Notification` directly.
* Rather, try to create POJOs matching the signature outlined in {@link ObservableNotification}.
* For example: `{ kind: 'N', value: 1 }`, `{ kind: 'E', error: new Error('bad') }`, or `{ kind: 'C' }`.
* Will be removed in v8.
*/
static createComplete(): Notification<never> & CompleteNotification {
return Notification.completeNotification;
}
}
/**
* Executes the appropriate handler on a passed `observer` given the `kind` of notification.
* If the handler is missing it will do nothing. Even if the notification is an error, if
* there is no error handler on the observer, an error will not be thrown, it will noop.
* @param notification The notification object to observe.
* @param observer The observer to notify.
*/
export function observeNotification<T>(notification: ObservableNotification<T>, observer: PartialObserver<T>) {
const { kind, value, error } = notification as any;
if (typeof kind !== 'string') {
throw new TypeError('Invalid notification, missing "kind"');
}
kind === 'N' ? observer.next?.(value!) : kind === 'E' ? observer.error?.(error) : observer.complete?.();
}