intellicenter/node-intellicenter
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Get basic test up and passing

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This replaces the 'ws' library with built-in websockets so that we can mock a server and successfully connect to it. A simple test verifies that Unit is handling a message request and response as we expect it to.
This commit is contained in:
Chris Pickett
2025-01-13 13:06:58 -06:00
parent 6c79e35e04
commit f8e2aa0f3e
10 changed files with 176 additions and 111 deletions
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2
esm/unit.d.ts vendored
View File

@ -30,6 +30,8 @@ export declare class Unit extends EventEmitter {
* Connects to the specified unit and maintains a connection to it until `close()` is called.
*/
connect(): Promise<void>;
private onOpen;
private onError;
/**
* Closes the connection to the unit.
*/

56
esm/unit.js
View File

@ -1,5 +1,4 @@
import { EventEmitter } from "events";
import { WebSocket } from "ws";
import debug from "debug";
const debugUnit = debug("ic:unit");
/**
@ -42,32 +41,33 @@ export class Unit extends EventEmitter {
}
debugUnit(`connecting to ws://${this.endpoint}:${this.port.toString()}`);
this.client = new WebSocket(`ws://${this.endpoint}:${this.port.toString()}`);
const { heartbeat, onClientMessage, socketCleanup } = this;
this.client.on("error", (evt) => {
// todo: emit event so we can reconnect? auto reconnect?
debugUnit("error in websocket: $o", evt);
this.emit("error", evt);
socketCleanup();
});
this.client.on("open", () => {
this.emit("open");
heartbeat();
});
this.client.on("ping", heartbeat);
this.client.on("pong", heartbeat);
this.client.on("close", socketCleanup);
this.client.on("message", onClientMessage);
const { onOpen, onError, onClientMessage, socketCleanup } = this;
this.client.addEventListener("error", onError);
this.client.addEventListener("open", onOpen);
this.client.addEventListener("close", socketCleanup);
this.client.addEventListener("message", onClientMessage);
this.pingTimer = setInterval(() => {
debugUnit("sending ping");
this.client?.ping();
// this isn't an actual command that is recognized by the system, we just want to make sure they're still there.
this.client?.send(JSON.stringify({ command: "ping" }));
}, this.pingInterval);
await new Promise((resolve, reject) => {
this.client?.once("error", reject);
this.client?.once("open", resolve);
this.client?.addEventListener("error", reject, true);
this.client?.addEventListener("open", resolve, true);
});
debugUnit("connected");
this.emit("connected");
}
onOpen = () => {
this.emit("open");
this.heartbeat();
};
onError = (evt) => {
// todo: emit event so we can reconnect? auto reconnect?
debugUnit("error in websocket: $o", evt);
this.emit("error", evt);
this.socketCleanup();
};
/**
* Closes the connection to the unit.
*/
@ -81,7 +81,10 @@ export class Unit extends EventEmitter {
socketCleanup = () => {
debugUnit("socket cleanup");
this.emit("close");
this.client?.removeAllListeners();
this.client?.removeEventListener("error", this.onError);
this.client?.removeEventListener("open", this.onOpen);
this.client?.removeEventListener("close", this.socketCleanup);
this.client?.removeEventListener("message", this.onClientMessage);
this.client = undefined;
if (this.pingTimeout) {
clearTimeout(this.pingTimeout);
@ -98,13 +101,20 @@ export class Unit extends EventEmitter {
this.pingTimeout = setTimeout(() => {
debugUnit("terminating connection due to heartbeat timeout");
this.emit("timeout");
this.client?.terminate();
try {
this.client?.close();
}
catch (ex) {
debugUnit("exception trying to close client from ping timeout: %o", ex);
}
this.socketCleanup();
}, this.pingInterval + 5000);
};
onClientMessage = (msg) => {
onClientMessage = (evt) => {
const msg = evt.data;
debugUnit("message received, length %d", msg.length);
const respObj = JSON.parse(msg.toString());
this.heartbeat();
const respObj = JSON.parse(msg);
if (respObj.command.toLowerCase() === "notifylist") {
debugUnit(" it's a subscription confirmation or update");
this.emit(`notify`, respObj);

2
esm/unit.js.map
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@ -1 +1 @@
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