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tibber.js
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tibber.js
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"use strict";
const fetch = require("node-fetch");
const {
dataPerHourQuery,
liveQuery,
gqlSubscriptionEndpointQuery,
realTimeEnabled,
user
} = require("./tibber-queries.js");
const WebSocket = require("ws");
const os = require("os");
const fs = require("fs");
const GQL_ENDPOINT = "https://api.tibber.com/v1-beta/gql";
const PROTOCOL = ["graphql-transport-ws"];
const getUserAgent = function () {
const packageJson = fs.readFileSync("package.json");
const packageData = JSON.parse(packageJson);
const version = packageData.version;
const platform = os.platform();
const nodeVersion = process.version;
const userAgent = `MMM-Tibber/${version} (${platform}; Node.js/${nodeVersion})`;
console.log("User-Agent: " + userAgent);
return userAgent;
};
const generateId = function () {
return "id" + Math.random().toString(16).slice(2);
};
const tibber = async function (tibberToken) {
let tokenVerified = false;
const tibberGqlQuery = async function (query) {
const headers = {
Authorization: `Bearer ${tibberToken}`,
"Content-Type": "application/json"
};
const body = {
query
};
const response = await fetch(GQL_ENDPOINT, {
method: "POST",
headers,
body: JSON.stringify(body)
});
const res = {
status: response.status,
data: {}
};
if (response.ok) {
res.data = await response.json();
} else {
if (res.status === 400) {
console.error(
"ERROR: Illegal Tibber token. Please sign in to developer.tibber.com to get correct token, and update the modules config."
);
} else {
console.error("ERROR calling Tibber API, status = " + res.status);
}
}
return res;
};
const perHour = async function (homeId, hoursHistory = 24) {
const query = dataPerHourQuery
.replace("HISTHOURS", hoursHistory)
.replace("HOMEID", homeId);
const res = await tibberGqlQuery(query);
return res.data.data.viewer;
};
const verifyRealtimeConsumption = async function (homeId) {
// Check if realtime consumption is enabled
const rtc = await tibberGqlQuery(realTimeEnabled.replace("HOMEID", homeId));
if (rtc.status !== 200) {
return false;
}
if (rtc.data.errors) {
console.error("ERROR Calling Tibber API:");
rtc.data.errors.forEach((e) => console.log(e.message));
return false;
}
if (!rtc.data.data.viewer.home.features.realTimeConsumptionEnabled) {
console.error(
"ERROR: Realtime consumption from Tibber is not enabled for home with id " +
homeId +
" (" +
rtc.data.data.viewer.home.address.address1 +
", " +
rtc.data.data.viewer.home.address.city +
")"
);
return false;
}
return true;
};
let ws;
let terminated = false;
let subscriptionId;
const sendMessage = function (type, id = null, data = {}) {
const payload = {
...data,
headers: {
Authorization: "Bearer " + tibberToken
}
};
const message = {
type,
payload
};
if (id != null) {
message.id = id;
}
const json = JSON.stringify(message);
ws.send(json);
};
const subscribe = async function (homeId, callback) {
subscriptionId = generateId();
let connected = false;
let connectionTimeout;
let heartbeat;
console.log("Starting Tibber subscription of live consumption");
if (!(await verifyRealtimeConsumption(homeId))) {
return;
}
// Find endpoint
const res = await tibberGqlQuery(gqlSubscriptionEndpointQuery);
const endpoint = res.data.data.viewer.websocketSubscriptionUrl;
console.log("Found endpoint: " + endpoint);
const query = liveQuery.replace("HOMEID", homeId);
const options = {
headers: {
Authorization: "Bearer " + tibberToken,
"User-Agent": getUserAgent()
}
};
const initWebsocket = function () {
console.log("Initializing WebSocket");
ws = new WebSocket(endpoint, PROTOCOL, options);
const startSubscription = function () {
const data = {
query
};
sendMessage("subscribe", subscriptionId, data);
};
ws.on("open", function open() {
sendMessage("connection_init");
});
ws.on("message", function message(json) {
const data = JSON.parse(json);
switch (data.type) {
case "connection_ack":
connected = true;
retryCount = 0;
startSubscription();
break;
case "ping":
sendMessage("pong");
break;
case "pong":
console.log("Received pong");
break;
case "next":
clearTimeout(connectionTimeout);
clearTimeout(heartbeat);
heartbeat = setTimeout(() => {
console.log("No data for 10 minutes. Restarting.");
initWebsocket();
}, 10 * 60 * 1000);
callback(data.payload.data.liveMeasurement);
break;
case "complete":
console.log("Got complete msg: " + JSON.stringify(data.payload));
ws.close();
break;
case "error":
console.log("Got error: " + JSON.stringify(data.payload));
ws.close();
break;
default:
console.log("Received unknown message type: " + data.type);
break;
}
});
ws.on("error", function error(e) {
console.log("Tibber WebSocket error: %s", e);
});
ws.on("close", function close() {
console.log("Tibber WebSocket closed");
});
};
let retryCount = 0;
const reconnect = function () {
if (terminated) {
return;
}
retryCount++;
const waitSeconds = Math.round(
Math.pow(2, retryCount) + Math.random() * 60
);
console.log("Reconnecting in " + waitSeconds + " seconds");
setTimeout(() => {
console.log("Reconnecting (retry no " + retryCount + ")");
connected = false;
if (ws) {
ws.close();
}
initWebsocket();
setTimeout(() => {
// Retry again if not connected
if (!connected) {
reconnect();
}
}, 10000);
}, waitSeconds * 1000);
};
connectionTimeout = setTimeout(() => {
reconnect();
}, 20000);
initWebsocket();
process.on("SIGINT", function () {
console.log("Caught interrupt signal");
close();
process.exit();
});
};
const close = function () {
// Close called from client. Shall close ws and terminate all activity.
terminated = true;
sendMessage("complete", subscriptionId);
ws.close();
};
const userRes = await tibberGqlQuery(user);
if (userRes.status === 200) {
console.info(
"Tibber API logged in with user " + userRes.data.data.viewer.name
);
tokenVerified = true;
}
return { close, tokenVerified, tibberGqlQuery, subscribe, perHour };
};
module.exports = tibber;