Function writeProjectFileContent

lib/services/file-browser.ts:223–264

(
  projectId: string,
  filePath: string,
  content: string
)

const MAX_WRITE_BYTES = 1_000_000; // 1MB safeguard

export async function writeProjectFileContent(
  projectId: string,
  filePath: string,
  content: string
): Promise<void> {
  const project = await getProjectById(projectId);
  if (!project) {
    throw new FileBrowserError('Project not found', 404);
  }

  if (typeof content !== 'string') {
    throw new FileBrowserError('Invalid file content', 400);
  }

  const repoRoot = resolveRepoRoot(project);
  const normalizedPath = normalizeRelativePath(filePath);
  const absolutePath = await resolveSafePath(
    repoRoot,
    normalizedPath === '.' ? '.' : normalizedPath
  );

  let stats;
  try {
    stats = await fs.stat(absolutePath);
  } catch (error) {
    throw new FileBrowserError('File not found', 404);
  }

  if (!stats.isFile()) {
    throw new FileBrowserError('Not a file', 400);
  }

  if (content.length > MAX_WRITE_BYTES) {
    throw new FileBrowserError('File content too large', 400);
  }

  try {
    await fs.writeFile(absolutePath, content, 'utf-8');
  } catch (error) {
    throw new FileBrowserError('Failed to write file', 500);
  }
}