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import { get } from "svelte/store";
import dataStore from "../../state/data";
import type { Connection } from "../channel/connection";
import type {
RequestIceCandidateMessage,
ShareAcceptedMessage,
} from "../channel/messages/messages";
import { createTransfer, addRemoteIceCandidate, Transfer, TransferState } from "./transfer";
export async function createTranferAndSendOffer(
c: Connection,
request_token: string,
onComplete: () => void
): Promise<Transfer> {
const transfer = createTransfer(c => onChannel(c, onComplete));
const offer = await transfer.pc.createOffer();
transfer.pc.setLocalDescription(offer);
transfer.pc.onicecandidate = event => {
const candidate = event.candidate;
if (event.candidate !== null) {
// TODO: Check whether transfer was cancelled and don't send if so.
c.send("ice_candidate", { candidate, token: request_token });
}
};
c.send("accept_request", {
token: request_token,
sdp: offer.sdp,
type: offer.type,
});
return transfer;
}
export function addRemoteDescription(
transfer: Transfer,
session: RTCSessionDescriptionInit
) {
const answerDescription = new RTCSessionDescription(session);
transfer.pc.setRemoteDescription(answerDescription);
}
function onChannel(channel: RTCDataChannel, completeTransfer: () => void) {
const data = get(dataStore).data;
channel.send(data);
// TODO: Add retransmission possibility in case of transfer failure?
completeTransfer();
}
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