import crypto from "node:crypto";

import fs from "node:fs/promises";

import path from "node:path";

import { MAX_DATE_TIMESTAMP_MS, timestampMsToIsoString } from "openclaw/plugin-sdk/number-runtime";

import { root as fsRoot } from "openclaw/plugin-sdk/security-runtime";

import { normalizeOptionalString } from "openclaw/plugin-sdk/string-coerce-runtime";

import type { PluginLogger } from "../api.js";

const htmlPath = path.join(artifactDir, "viewer.html");

const ttlMs = normalizeTtlMs(params.ttlMs);

const createdAt = new Date();

const expiresAt = new Date(createdAt.getTime() + ttlMs);

const createdAtIso = createdAt.toISOString();

const expiresAt = resolveExpiresAtIso(createdAt.getTime(), ttlMs);

const meta: DiffArtifactMeta = {

id,

token,

title: params.title,

inputKind: params.inputKind,

fileCount: params.fileCount,

createdAt: createdAt.toISOString(),

expiresAt: expiresAt.toISOString(),

createdAt: createdAtIso,

expiresAt,

viewerPath: `${VIEWER_PREFIX}/${id}/${token}`,

htmlPath,

...(params.context ? { context: params.context } : {}),

const filePath = path.join(artifactDir, `preview.${format}`);

const ttlMs = normalizeTtlMs(params.ttlMs);

const createdAt = new Date();

const expiresAt = new Date(createdAt.getTime() + ttlMs).toISOString();

const createdAtIso = createdAt.toISOString();

const expiresAt = resolveExpiresAtIso(createdAt.getTime(), ttlMs);

const meta: StandaloneFileMeta = {

kind: "standalone_file",

id,

createdAt: createdAt.toISOString(),

createdAt: createdAtIso,

expiresAt,

filePath: this.normalizeStoredPath(filePath, "filePath"),

...(params.context ? { context: params.context } : {}),

return Math.min(rounded, MAX_TTL_MS);

}

function resolveExpiresAtIso(createdAtMs: number, ttlMs: number): string {

return (

timestampMsToIsoString(createdAtMs + ttlMs) ??

timestampMsToIsoString(MAX_DATE_TIMESTAMP_MS) ??

"1970-01-01T00:00:00.000Z"

);

}

function isExpired(meta: { expiresAt: string }): boolean {

const expiresAt = Date.parse(meta.expiresAt);

if (!Number.isFinite(expiresAt)) {