Function markGhFilesViewed

packages/shared/pr-github.ts:604–641

(
  runtime: PRRuntime,
  ref: GhPRRef,
  prNodeId: string,
  filePaths: string[],
  viewed: boolean,
)

 * Throws only if ALL mutations fail.
 */
export async function markGhFilesViewed(
  runtime: PRRuntime,
  ref: GhPRRef,
  prNodeId: string,
  filePaths: string[],
  viewed: boolean,
): Promise<void> {
  if (filePaths.length === 0) return;

  const mutationName = viewed ? "markFileAsViewed" : "unmarkFileAsViewed";
  const mutation = `
    mutation($id: ID!, $path: String!) {
      ${mutationName}(input: { pullRequestId: $id, path: $path }) {
        clientMutationId
      }
    }
  `;

  const results = await Promise.allSettled(
    filePaths.map((path) =>
      runtime.runCommandWithInput
        ? runtime.runCommand("gh", hostnameArgs(ref.host, [
            "api", "graphql",
            "-f", `query=${mutation}`,
            "-F", `id=${prNodeId}`,
            "-F", `path=${path}`,
          ]))
        : Promise.reject(new Error("Runtime does not support commands")),
    ),
  );

  const failures = results.filter((r): r is PromiseRejectedResult => r.status === "rejected");
  if (failures.length === filePaths.length) {
    throw new Error(
      `Failed to ${mutationName} all files: ${failures[0].reason}`,
    );
  }
}

// --- Submit PR Review ---