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import { get, Readable, writable, Writable } from "svelte/store";
import {
IncomingRequest,
IncomingRequestState,
newIncomingRequest,
} from "../models/incoming_request";
import { RookType } from "../models/rook_type";
import { Connection } from "../network/channel/connection";
import type {
NewRequestMessage,
RequestCancelledMessage,
RequestIceCandidateMessage,
ShareAcceptedMessage,
} from "../network/channel/messages/messages";
import {
addRemoteDescription,
createTranferAndSendOffer,
} from "../network/transfer/share_transfer";
import { addRemoteIceCandidate } from "../network/transfer/transfer";
import { isClientShare } from "./constant_state";
import data from "./data";
import b from "../utils/bind";
export enum ShareStateType {
CHOOSING_DATA,
CONNECTING,
SHARING,
}
type ShareState = {
type: Writable<ShareStateType>;
state: ChoosingData | Connecting | Sharing;
};
let share: ShareState | null = null;
export function initializeShare() {
if (!isClientShare()) {
throw new Error("Tried to initialize share state on non-share client.");
}
if (share) {
throw new Error("Share state already initialized.");
}
share = {
type: writable(ShareStateType.CHOOSING_DATA),
state: new ChoosingData(),
};
}
export function getShareState(): ShareState {
if (!isClientShare()) {
throw new Error("Tried to access share state on non-share client.");
}
return share;
}
export class ChoosingData {
public submitData(d: string): void {
data.set(d);
share.type.set(ShareStateType.CONNECTING);
share.state = new Connecting();
}
}
export class Connecting {
private connection: Connection;
constructor() {
this.connection = new Connection();
this.connection.setChannelMessageHandler({});
this.connection.start(RookType.SHARE).then(b(this, this.onConnect));
}
private onConnect() {
share.type.set(ShareStateType.SHARING);
share.state = new Sharing(this.connection);
}
}
export class Sharing {
private incomingRequests: Writable<{ [key: string]: IncomingRequest }> =
writable({});
private connection: Connection;
constructor(connection: Connection) {
this.connection = connection;
this.connection.setChannelMessageHandler({
new_request: b(this, this.onNewRequest),
request_cancelled: b(this, this.onRequestCancelled),
share_accepted: b(this, this.onShareAccepted),
request_ice_candidate: b(this, this.onRequestIceCandidate),
});
}
public getToken(): string {
return this.connection.token;
}
public getRequests(): Readable<{ [key: string]: IncomingRequest }> {
return this.incomingRequests;
}
public async acceptRequest(request: IncomingRequest) {
request.state.set(IncomingRequestState.IN_FLIGHT);
const transfer = await createTranferAndSendOffer(
this.connection,
request.info.token,
() => {
this.onRequestTransferComplete(request);
}
);
request.transfer = transfer;
}
public async declineRequest(request: IncomingRequest) {
// TODO: Implement.
throw new Error("Declining requests is not implemented yet.");
}
private onNewRequest(m: NewRequestMessage) {
const request = newIncomingRequest(m.token, m.ip, m.location, m.client);
const mapping = {
[m.token]: request,
};
// TODO: Check if the request is already in the list.
this.incomingRequests.update(requests => {
return {
...requests,
...mapping,
};
});
}
private onRequestCancelled(m: RequestCancelledMessage) {
// TODO: Cancel ongoing share.
this.incomingRequests.update(requests => {
const newRequests = {
...requests,
};
// TODO: Check if the request is in the list.
delete newRequests[m.token];
return newRequests;
});
}
private onShareAccepted(m: ShareAcceptedMessage) {
// TODO: Check if the request is in the list.
const request = get(this.incomingRequests)[m.token];
addRemoteDescription(request.transfer, m);
}
private onRequestIceCandidate(m: RequestIceCandidateMessage) {
const request = get(this.incomingRequests)[m.token];
addRemoteIceCandidate(request.transfer, m.candidate);
}
private onRequestTransferComplete(request: IncomingRequest) {
request.state.set(IncomingRequestState.DONE);
}
}
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