58 lines
1.9 KiB
TypeScript
58 lines
1.9 KiB
TypeScript
import * as plugins from './smartstate.plugins';
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import { StatePart } from './smartstate.classes.statepart';
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/**
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* Smartstate takes care of providing state
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*/
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export class Smartstate<StatePartNameType> {
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public statePartMap: { [key: string]: StatePart<StatePartNameType, any> } = {};
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constructor() {}
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/**
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* Allows getting and initializing a new statepart
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* initMode === 'soft' it will allow existing stateparts
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* initMode === 'mandatory' will fail if there is an exiting statepart
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* initMode === 'force' will overwrite any existing statepart
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* @param statePartNameArg
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* @param initialArg
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* @param initMode
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*/
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public getStatePart<PayloadType>(
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statePartNameArg: string & StatePartNameType,
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initialArg?: PayloadType,
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initMode?: 'soft' | 'mandatory' | 'force'
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): StatePart<StatePartNameType, PayloadType> {
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if (this.statePartMap[statePartNameArg as any]) {
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if (initialArg && (!initMode || initMode !== 'soft')) {
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throw new Error(
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`${statePartNameArg} already exists, yet you try to set an initial state again`
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);
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}
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return this.statePartMap[statePartNameArg] as StatePart<StatePartNameType, PayloadType>;
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} else {
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if (!initialArg) {
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throw new Error(
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`${statePartNameArg} does not yet exist, yet you don't provide an initial state`
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);
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}
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return this.createStatePart<PayloadType>(statePartNameArg, initialArg);
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}
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}
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/**
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* creates a statepart
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* @param statePartName
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* @param initialPayloadArg
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*/
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private createStatePart<PayloadType>(
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statePartName: StatePartNameType,
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initialPayloadArg: PayloadType
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): StatePart<StatePartNameType, PayloadType> {
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const newState = new StatePart<StatePartNameType, PayloadType>(statePartName);
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newState.setState(initialPayloadArg);
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this.statePartMap[statePartName as any] = newState;
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return newState;
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}
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}
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