17cc6ed72c
Memento-based undo/redo with full encounter snapshots. Undo stack capped at 50 entries, persisted to localStorage. Triggered via buttons in the top bar (inboard of turn navigation) and keyboard shortcuts (Ctrl+Z / Ctrl+Shift+Z, Cmd on Mac, case-insensitive key matching). Clear encounter resets both stacks. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
25 lines
553 B
TypeScript
25 lines
553 B
TypeScript
import {
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type DomainError,
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type Encounter,
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isDomainError,
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undo,
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} from "@initiative/domain";
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import type { EncounterStore, UndoRedoStore } from "./ports.js";
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export function undoUseCase(
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encounterStore: EncounterStore,
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undoRedoStore: UndoRedoStore,
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): Encounter | DomainError {
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const current = encounterStore.get();
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const state = undoRedoStore.get();
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const result = undo(state, current);
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if (isDomainError(result)) {
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return result;
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}
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encounterStore.save(result.encounter);
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undoRedoStore.save(result.state);
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return result.encounter;
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}
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