| // The work on the board (הדרך): after an answer, a picture of the question's board goes to the server, so the teacher can grade the way and | |
| // not only the final answer. A picture is sent again only when the board changed; an empty board sends nothing. | |
| import { sendPicture } from "./media.js"; | |
| const sent = new Map(); // board key -> the sketch's signature when it was last sent | |
| /** Is there anything but the question's copy on this board? */ | |
| export const hasWork = boardKey => !!window.MathlyBoard?.hasWork?.(boardKey); | |
| /** Send the board's picture as the work for one answer: `ref` is the attempt's id or "practice". Resolves to true when the server has it. */ | |
| export async function sendWork(boardKey, ref, questionKey) { | |
| const board = window.MathlyBoard; | |
| if (!board?.hasWork?.(boardKey)) return false; | |
| const sig = board.workSig(boardKey); | |
| if (sent.get(boardKey) === sig) return true; | |
| const blob = await board.pictureOf(boardKey); | |
| if (!blob) return false; | |
| await sendPicture(`/api/work?ref=${encodeURIComponent(ref)}&key=${encodeURIComponent(questionKey)}`, blob); | |
| sent.set(boardKey, sig); | |
| return true; | |
| } | |
| /** The same, never failing the caller (practice and rounds go on whatever happens to the picture). */ | |
| export const sendWorkQuietly = (...args) => sendWork(...args).catch(() => false); | |