2598e4ea22
* Remove vm related code from element-web/src * Add and export view model code from package * Update imports * Rewrite vm tests using vitest * Add github action to run vm tests * Fix lint errors * Mvoe tests over to jest * Try fixing code coverage * Second attempt at fixing code coverage
44 lines
1.1 KiB
TypeScript
44 lines
1.1 KiB
TypeScript
/*
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Copyright 2025 New Vector Ltd.
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SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
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Please see LICENSE files in the repository root for full details.
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*/
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/**
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* This is the output of the viewmodel that the view consumes.
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* Updating snapshot through this object will make react re-render
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* components.
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*/
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export class Snapshot<T> {
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public constructor(
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private snapshot: T,
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private emit: () => void,
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) {}
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/**
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* Replace current snapshot with a new snapshot value.
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* @param snapshot New snapshot value
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*/
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public set(snapshot: T): void {
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this.snapshot = snapshot;
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this.emit();
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}
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/**
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* Update a part of the current snapshot by merging into the existing snapshot.
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* @param snapshot A subset of the snapshot to merge into the current snapshot.
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*/
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public merge(snapshot: Partial<T>): void {
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this.snapshot = { ...this.snapshot, ...snapshot };
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this.emit();
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}
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/**
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* The current value of the snapshot.
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*/
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public get current(): T {
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return this.snapshot;
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}
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}
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