diff.ts

import { createHash } from "node:crypto";
import { readFileSync, statSync } from "node:fs";

export function sha256(buf: Buffer | string): string {
  return createHash("sha256").update(buf).digest("hex");
}

export function fileSha256(path: string): string {
  return sha256(readFileSync(path));
}

export function fileExists(path: string): boolean {
  try {
    statSync(path);
    return true;
  } catch {
    return false;
  }
}

export function getByPath(obj: unknown, path: string): unknown {
  const parts = path.split(".");
  let cur: unknown = obj;
  for (const part of parts) {
    if (cur == null || typeof cur !== "object") return undefined;
    cur = (cur as Record<string, unknown>)[part];
  }
  return cur;
}

export function setByPath(
  obj: Record<string, unknown>,
  path: string,
  value: unknown,
): void {
  const parts = path.split(".");
  let cur: Record<string, unknown> = obj;
  for (let i = 0; i < parts.length - 1; i++) {
    const key = parts[i]!;
    const next = cur[key];
    if (next == null || typeof next !== "object" || Array.isArray(next)) {
      cur[key] = {};
    }
    cur = cur[key] as Record<string, unknown>;
  }
  cur[parts[parts.length - 1]!] = value;
}