44d79e2c9a
- Unify test data for nonexistence of an object/string and collection. - Introduce more test through adding missing test data to existing tests. - Improve logic for checking absence of values to match tests. - Add missing tests for absent value validation. - Update documentation to include shared test functionality.
65 lines
2.1 KiB
TypeScript
65 lines
2.1 KiB
TypeScript
import { IApplication } from '@/domain/IApplication';
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import { OperatingSystem } from '@/domain/OperatingSystem';
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import { ICategoryCollection } from '@/domain/ICategoryCollection';
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import { EventSource } from '@/infrastructure/Events/EventSource';
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import { assertInRange } from '@/application/Common/Enum';
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import { CategoryCollectionState } from './State/CategoryCollectionState';
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import { ICategoryCollectionState } from './State/ICategoryCollectionState';
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import { IApplicationContext, IApplicationContextChangedEvent } from './IApplicationContext';
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type StateMachine = Map<OperatingSystem, ICategoryCollectionState>;
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export class ApplicationContext implements IApplicationContext {
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public readonly contextChanged = new EventSource<IApplicationContextChangedEvent>();
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public collection: ICategoryCollection;
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public currentOs: OperatingSystem;
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public get state(): ICategoryCollectionState {
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return this.states[this.collection.os];
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}
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private readonly states: StateMachine;
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public constructor(
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public readonly app: IApplication,
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initialContext: OperatingSystem,
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) {
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validateApp(app);
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this.states = initializeStates(app);
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this.changeContext(initialContext);
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}
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public changeContext(os: OperatingSystem): void {
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assertInRange(os, OperatingSystem);
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if (this.currentOs === os) {
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return;
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}
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this.collection = this.app.getCollection(os);
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if (!this.collection) {
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throw new Error(`os "${OperatingSystem[os]}" is not defined in application`);
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}
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const event: IApplicationContextChangedEvent = {
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newState: this.states[os],
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oldState: this.states[this.currentOs],
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};
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this.contextChanged.notify(event);
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this.currentOs = os;
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}
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}
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function validateApp(app: IApplication) {
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if (!app) {
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throw new Error('missing app');
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}
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}
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function initializeStates(app: IApplication): StateMachine {
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const machine = new Map<OperatingSystem, ICategoryCollectionState>();
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for (const collection of app.collections) {
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machine[collection.os] = new CategoryCollectionState(collection);
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}
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return machine;
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}
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