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1import OBSWebSocket from 'obs-websocket-js';
2
3export type OBSControlOptions = {
4 url?: string;
5 password?: string;
6 sceneName?: string;
7 textInputName?: string;
8};
9
10export class OBSControlClient {
11 private readonly obs = new OBSWebSocket();
12 private readonly url: string;
13 private readonly password?: string;
14 private readonly sceneName?: string;
15 private readonly textInputName?: string;
16 private connected = false;
17
18 constructor(options: OBSControlOptions = {}) {
19 this.url = options.url ?? process.env.OBS_WS_URL ?? 'ws://127.0.0.1:4455';
20 this.password = options.password ?? process.env.OBS_WS_PASSWORD;
21 this.sceneName = options.sceneName ?? process.env.OBS_SCENE_NAME;
22 this.textInputName = options.textInputName ?? process.env.OBS_TEXT_INPUT_NAME;
23 }
24
25 async connect() {
26 if (this.connected) return;
27 await this.obs.connect(this.url, this.password, { rpcVersion: 1 });
28 this.connected = true;
29 }
30
31 async setProgramScene(sceneName = this.sceneName) {
32 if (!sceneName) return;
33 await this.connect();
34 await this.obs.call('SetCurrentProgramScene', { sceneName });
35 }
36
37 async ensureTextInput(inputName = this.textInputName, sceneName = this.sceneName) {
38 if (!inputName || !sceneName) return;
39 await this.connect();
40
41 try {
42 await this.obs.call('GetInputSettings', { inputName });
43 return;
44 } catch {
45 await this.obs.call('CreateInput', {
46 sceneName,
47 inputName,
48 inputKind: 'text_ft2_source',
49 inputSettings: {
50 text: '',
51 },
52 sceneItemEnabled: true,
53 });
54 }
55 }
56
57 async setText(text: string, inputName = this.textInputName) {
58 if (!inputName) return;
59 await this.connect();
60 await this.ensureTextInput(inputName, this.sceneName);
61 await this.obs.call('SetInputSettings', {
62 inputName,
63 inputSettings: {
64 text,
65 },
66 overlay: true,
67 });
68 }
69
70 async disconnect() {
71 if (!this.connected) return;
72 await this.obs.disconnect();
73 this.connected = false;
74 }
75}