0996073deb
Adds DiffCache<T> module, extends BranchManager with getHeadCommitHash, and wires phase-level caching into getPhaseReviewDiff and getFileDiff. Cache is invalidated in ExecutionOrchestrator after each task merges into the phase branch, ensuring stale diffs are never served after new commits. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
68 lines
1.9 KiB
TypeScript
68 lines
1.9 KiB
TypeScript
/**
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* DiffCache — in-memory cache with TTL and prefix-based invalidation.
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* Used to avoid re-running expensive git diff subprocesses on repeated requests.
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*/
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import type { FileStatEntry } from '../git/types.js';
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interface CacheEntry<T> {
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value: T;
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expiresAt: number;
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}
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export class DiffCache<T> {
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private store = new Map<string, CacheEntry<T>>();
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private ttlMs: number;
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constructor(ttlMs: number) {
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this.ttlMs = ttlMs;
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}
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get(key: string): T | undefined {
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const entry = this.store.get(key);
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if (!entry) return undefined;
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if (Date.now() > entry.expiresAt) {
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this.store.delete(key);
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return undefined;
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}
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return entry.value;
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}
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set(key: string, value: T): void {
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this.store.set(key, { value, expiresAt: Date.now() + this.ttlMs });
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}
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invalidateByPrefix(prefix: string): void {
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for (const key of this.store.keys()) {
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if (key.startsWith(prefix)) this.store.delete(key);
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}
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}
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}
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// ---------------------------------------------------------------------------
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// Response shapes (mirror the return types of getPhaseReviewDiff / getFileDiff)
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// ---------------------------------------------------------------------------
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export interface PhaseMetaResponse {
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phaseName: string;
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sourceBranch: string;
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targetBranch: string;
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files: FileStatEntry[];
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totalAdditions: number;
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totalDeletions: number;
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}
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export interface FileDiffResponse {
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binary: boolean;
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rawDiff: string;
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}
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// ---------------------------------------------------------------------------
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// Singleton instances — TTL is read once at module load time
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// ---------------------------------------------------------------------------
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const TTL = parseInt(process.env.REVIEW_DIFF_CACHE_TTL_MS ?? '300000', 10);
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export const phaseMetaCache = new DiffCache<PhaseMetaResponse>(TTL);
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export const fileDiffCache = new DiffCache<FileDiffResponse>(TTL);
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