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import { Channel, Push, Socket } from "phoenix";
import {
Handler,
Handlers,
registerTokenHandler,
UnregisterHandler,
} from "./messages/handler";
import type { AnyMessage } from "./messages/messages";
import { startRequest } from "./request";
import { startShare } from "./share";
import { connectSocket, fetchToken } from "./socket";
export enum Type {
NONE,
REQUEST,
SHARE,
}
enum ConnectionState {
CONNECTING_SOCKET,
FETCHING_TOKEN,
CONNECTING_CHANNEL,
CONNECTED,
}
export type Connection = {
socket: Socket;
channel: Channel | null;
token: string | null;
state: ConnectionState;
handlers: Handlers;
type: Type;
};
const connection: Connection = {
socket: new Socket("/socket", {}),
channel: null,
token: null,
state: ConnectionState.CONNECTING_SOCKET,
handlers: {},
type: Type.NONE,
};
export async function start(type: Type.REQUEST | Type.SHARE) {
connection.type = type;
await connectSocket(connection.socket);
updateState(ConnectionState.FETCHING_TOKEN);
connection.token = await fetchToken(connection.socket);
updateState(ConnectionState.CONNECTING_CHANNEL);
type === Type.SHARE
? await startShare(connection)
: await startRequest(connection);
}
export function send(event: string, data: any): Push {
if (connection.state !== ConnectionState.CONNECTED) {
throw new Error("There is no connection yet.");
}
return connection.channel.push(event, data);
}
export function onWithToken<Message extends AnyMessage>(
event: string,
token: string | null,
handler: Handler<Message>
): UnregisterHandler {
return registerTokenHandler(connection.handlers, event, token, handler);
}
export function on<Message extends AnyMessage>(
event: string,
handler: Handler<Message>
): UnregisterHandler {
return onWithToken(event, null, handler);
}
export function getOwnToken(): string {
if (connection.state <= ConnectionState.FETCHING_TOKEN) {
throw new Error("There is no token yet.");
}
return connection.token;
}
export function getChannel(): Channel {
if (connection.state <= ConnectionState.FETCHING_TOKEN) {
throw new Error("There is no channel yet.");
}
return connection.channel;
}
function updateState(state: ConnectionState) {
// TODO: Notify state listeners
connection.state = state;
}
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