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import WebSocketClient from '@gamestdio/websocket';
const randomIntUpTo = max => Math.floor(Math.random() * Math.floor(max));
const knownEventTypes = [
'update',
'delete',
'notification',
'conversation',
'filters_changed',
];
export function connectStream(path, pollingRefresh = null, callbacks = () => ({ onConnect() {}, onDisconnect() {}, onReceive() {} })) {
return (dispatch, getState) => {
const streamingAPIBaseURL = getState().getIn(['meta', 'streaming_api_base_url']);
const accessToken = getState().getIn(['meta', 'access_token']);
const { onConnect, onDisconnect, onReceive } = callbacks(dispatch, getState);
let polling = null;
const setupPolling = () => {
pollingRefresh(dispatch, () => {
polling = setTimeout(() => setupPolling(), 20000 + randomIntUpTo(20000));
});
};
const clearPolling = () => {
if (polling) {
clearTimeout(polling);
polling = null;
}
};
const subscription = getStream(streamingAPIBaseURL, accessToken, path, {
connected () {
if (pollingRefresh) {
clearPolling();
}
onConnect();
},
disconnected () {
if (pollingRefresh) {
polling = setTimeout(() => setupPolling(), randomIntUpTo(40000));
}
onDisconnect();
},
received (data) {
onReceive(data);
},
reconnected () {
if (pollingRefresh) {
clearPolling();
pollingRefresh(dispatch);
}
onConnect();
},
});
const disconnect = () => {
if (subscription) {
subscription.close();
}
clearPolling();
};
return disconnect;
};
}
export default function getStream(streamingAPIBaseURL, accessToken, stream, { connected, received, disconnected, reconnected }) {
const params = stream.split('&');
stream = params.shift();
if (streamingAPIBaseURL.startsWith('ws')) {
params.unshift(`stream=${stream}`);
const ws = new WebSocketClient(`${streamingAPIBaseURL}/api/v1/streaming/?${params.join('&')}`, accessToken);
ws.onopen = connected;
ws.onmessage = e => received(JSON.parse(e.data));
ws.onclose = disconnected;
ws.onreconnect = reconnected;
return ws;
}
stream = stream.replace(/:/g, '/');
params.push(`access_token=${accessToken}`);
const es = new EventSource(`${streamingAPIBaseURL}/api/v1/streaming/${stream}?${params.join('&')}`);
let firstConnect = true;
es.onopen = () => {
if (firstConnect) {
firstConnect = false;
connected();
} else {
reconnected();
}
};
for (let type of knownEventTypes) {
es.addEventListener(type, (e) => {
received({
event: e.type,
payload: e.data,
});
});
}
es.onerror = disconnected;
return es;
};
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