Дмитрий
68 lines
2.1 KiB
TypeScript
68 lines
2.1 KiB
TypeScript
import { readFileSync, writeFileSync, renameSync, existsSync, mkdirSync } from 'node:fs';
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import { dirname } from 'node:path';
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import type { Manifest, ManifestEntry } from './types';
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export function createEmpty(): Manifest {
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return {
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$schema: './dev-indices.schema.json',
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version: 1,
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lastId: 0,
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entries: {},
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deleted: {},
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};
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}
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export function loadManifest(path: string): Manifest {
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if (!existsSync(path)) return createEmpty();
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try {
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const raw = readFileSync(path, 'utf8');
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const parsed = JSON.parse(raw) as Manifest;
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if (parsed.version !== 1) {
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throw new Error(`dev-indices manifest version ${parsed.version} unsupported (expected 1)`);
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}
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parsed.entries ??= {};
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parsed.deleted ??= {};
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return parsed;
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} catch (err) {
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if (err instanceof SyntaxError) {
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throw new Error(`dev-indices manifest at ${path} is corrupt JSON: ${err.message}`);
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}
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throw err;
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}
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}
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export function saveManifest(path: string, manifest: Manifest): void {
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mkdirSync(dirname(path), { recursive: true });
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const tmp = path + '.tmp';
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const json = JSON.stringify(manifest, null, 2);
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writeFileSync(tmp, json, 'utf8');
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renameSync(tmp, path);
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}
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export function findBySignature(manifest: Manifest, signature: string): number | null {
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for (const [id, entry] of Object.entries(manifest.entries)) {
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if (entry.signature === signature) return Number(id);
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}
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return null;
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}
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export function addEntry(manifest: Manifest, entry: ManifestEntry): number {
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const id = manifest.lastId + 1;
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manifest.lastId = id;
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manifest.entries[String(id)] = entry;
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return id;
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}
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export function markDeleted(manifest: Manifest, id: number): void {
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const key = String(id);
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const entry = manifest.entries[key];
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// no-op if id was never added or already deleted — defensive, callers should not rely on this
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if (!entry) return;
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manifest.deleted[key] = {
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lastSignature: entry.signature,
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lastFile: entry.file,
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deletedAt: new Date().toISOString(),
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};
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delete manifest.entries[key];
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}
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