29 lines
1022 B
TypeScript
29 lines
1022 B
TypeScript
import { StatePart } from './smartstate.classes.statepart.js';
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/**
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* Context object passed to action definitions, enabling safe nested dispatch.
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* Use `context.dispatch()` to dispatch sub-actions inline (bypasses the mutation queue).
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* Direct `statePart.dispatchAction()` from within an action will deadlock.
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*/
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export interface IActionContext<TStateType> {
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dispatch<T>(action: StateAction<TStateType, T>, payload: T): Promise<TStateType>;
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}
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export interface IActionDef<TStateType, TActionPayloadType> {
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(stateArg: StatePart<any, TStateType>, actionPayload: TActionPayloadType, context?: IActionContext<TStateType>): Promise<TStateType>;
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}
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/**
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* an actionmodifier for the state
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*/
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export class StateAction<TStateType, TActionPayloadType> {
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constructor(
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public statePartRef: StatePart<any, any>,
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public actionDef: IActionDef<TStateType, TActionPayloadType>
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) {}
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public trigger(payload: TActionPayloadType): Promise<TStateType> {
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return this.statePartRef.dispatchAction(this, payload);
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}
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}
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