@ngrx/effects
Version:
Side effect model for @ngrx/store
75 lines • 11.3 kB
JavaScript
import { Inject, Injectable } from '@angular/core';
import { ScannedActionsSubject, } from '@ngrx/store';
import { Observable } from 'rxjs';
import { filter } from 'rxjs/operators';
import * as i0 from "@angular/core";
import * as i1 from "rxjs";
export class Actions extends Observable {
constructor(source) {
super();
if (source) {
this.source = source;
}
}
lift(operator) {
const observable = new Actions();
observable.source = this;
observable.operator = operator;
return observable;
}
/** @nocollapse */ static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "17.0.0", ngImport: i0, type: Actions, deps: [{ token: ScannedActionsSubject }], target: i0.ɵɵFactoryTarget.Injectable }); }
/** @nocollapse */ static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "17.0.0", ngImport: i0, type: Actions, providedIn: 'root' }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "17.0.0", ngImport: i0, type: Actions, decorators: [{
type: Injectable,
args: [{ providedIn: 'root' }]
}], ctorParameters: () => [{ type: i1.Observable, decorators: [{
type: Inject,
args: [ScannedActionsSubject]
}] }] });
/**
* `ofType` filters an Observable of `Actions` into an Observable of the actions
* whose type strings are passed to it.
*
* For example, if `actions` has type `Actions<AdditionAction|SubstractionAction>`, and
* the type of the `Addition` action is `add`, then
* `actions.pipe(ofType('add'))` returns an `Observable<AdditionAction>`.
*
* Properly typing this function is hard and requires some advanced TS tricks
* below.
*
* Type narrowing automatically works, as long as your `actions` object
* starts with a `Actions<SomeUnionOfActions>` instead of generic `Actions`.
*
* For backwards compatibility, when one passes a single type argument
* `ofType<T>('something')` the result is an `Observable<T>`. Note, that `T`
* completely overrides any possible inference from 'something'.
*
* Unfortunately, for unknown 'actions: Actions' these types will produce
* 'Observable<never>'. In such cases one has to manually set the generic type
* like `actions.ofType<AdditionAction>('add')`.
*
* @usageNotes
*
* Filter the Actions stream on the "customers page loaded" action
*
* ```ts
* import { ofType } from '@ngrx/effects';
* import * fromCustomers from '../customers';
*
* this.actions$.pipe(
* ofType(fromCustomers.pageLoaded)
* )
* ```
*/
export function ofType(...allowedTypes) {
return filter((action) => allowedTypes.some((typeOrActionCreator) => {
if (typeof typeOrActionCreator === 'string') {
// Comparing the string to type
return typeOrActionCreator === action.type;
}
// We are filtering by ActionCreator
return typeOrActionCreator.type === action.type;
}));
}
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E : ReturnType<Extract<T, AC>>;\n\nexport function ofType<\n  AC extends ActionCreator<string, Creator>[],\n  U extends Action = Action,\n  V = ReturnType<AC[number]>\n>(...allowedTypes: AC): OperatorFunction<U, V>;\n\nexport function ofType<\n  E extends Extract<U, { type: T1 }>,\n  AC extends ActionCreator<string, Creator>,\n  T1 extends string | AC,\n  U extends Action = Action,\n  V = T1 extends string ? E : ReturnType<Extract<T1, AC>>\n>(t1: T1): OperatorFunction<U, V>;\nexport function ofType<\n  E extends Extract<U, { type: T1 | T2 }>,\n  AC extends ActionCreator<string, Creator>,\n  T1 extends string | AC,\n  T2 extends string | AC,\n  U extends Action = Action,\n  V = ActionExtractor<T1 | T2, AC, E>\n>(t1: T1, t2: T2): OperatorFunction<U, V>;\nexport function ofType<\n  E extends Extract<U, { type: T1 | T2 | T3 }>,\n  AC extends ActionCreator<string, Creator>,\n  T1 extends string | AC,\n  T2 extends string | AC,\n  T3 extends string | AC,\n  U extends Action = Action,\n  V = ActionExtractor<T1 | T2 | T3, AC, E>\n>(t1: T1, t2: T2, t3: T3): OperatorFunction<U, V>;\nexport function ofType<\n  E extends Extract<U, { type: T1 | T2 | T3 | T4 }>,\n  AC extends ActionCreator<string, Creator>,\n  T1 extends string | AC,\n  T2 extends string | AC,\n  T3 extends string | AC,\n  T4 extends string | AC,\n  U extends Action = Action,\n  V = ActionExtractor<T1 | T2 | T3 | T4, AC, E>\n>(t1: T1, t2: T2, t3: T3, t4: T4): OperatorFunction<U, V>;\nexport function ofType<\n  E extends Extract<U, { type: T1 | T2 | T3 | T4 | T5 }>,\n  AC extends ActionCreator<string, Creator>,\n  T1 extends string | AC,\n  T2 extends string | AC,\n  T3 extends string | AC,\n  T4 extends string | AC,\n  T5 extends string | AC,\n  U extends Action = Action,\n  V = ActionExtractor<T1 | T2 | T3 | T4 | T5, AC, E>\n>(t1: T1, t2: T2, t3: T3, t4: T4, t5: T5): OperatorFunction<U, V>;\n/**\n * Fallback for more than 5 arguments.\n * There is no inference, so the return type is the same as the input -\n * Observable<Action>.\n *\n * We provide a type parameter, even though TS will not infer it from the\n * arguments, to preserve backwards compatibility with old versions of ngrx.\n */\nexport function ofType<V extends Action>(\n  ...allowedTypes: Array<string | ActionCreator<string, Creator>>\n): OperatorFunction<Action, V>;\n/**\n * `ofType` filters an Observable of `Actions` into an Observable of the actions\n * whose type strings are passed to it.\n *\n * For example, if `actions` has type `Actions<AdditionAction|SubstractionAction>`, and\n * the type of the `Addition` action is `add`, then\n * `actions.pipe(ofType('add'))` returns an `Observable<AdditionAction>`.\n *\n * Properly typing this function is hard and requires some advanced TS tricks\n * below.\n *\n * Type narrowing automatically works, as long as your `actions` object\n * starts with a `Actions<SomeUnionOfActions>` instead of generic `Actions`.\n *\n * For backwards compatibility, when one passes a single type argument\n * `ofType<T>('something')` the result is an `Observable<T>`. Note, that `T`\n * completely overrides any possible inference from 'something'.\n *\n * Unfortunately, for unknown 'actions: Actions' these types will produce\n * 'Observable<never>'. In such cases one has to manually set the generic type\n * like `actions.ofType<AdditionAction>('add')`.\n *\n * @usageNotes\n *\n * Filter the Actions stream on the \"customers page loaded\" action\n *\n * ```ts\n * import { ofType } from '@ngrx/effects';\n * import * fromCustomers from '../customers';\n *\n * this.actions$.pipe(\n *  ofType(fromCustomers.pageLoaded)\n * )\n * ```\n */\nexport function ofType(\n  ...allowedTypes: Array<string | ActionCreator<string, Creator>>\n): OperatorFunction<Action, Action> {\n  return filter((action: Action) =>\n    allowedTypes.some((typeOrActionCreator) => {\n      if (typeof typeOrActionCreator === 'string') {\n        // Comparing the string to type\n        return typeOrActionCreator === action.type;\n      }\n\n      // We are filtering by ActionCreator\n      return typeOrActionCreator.type === action.type;\n    })\n  );\n}\n"]}