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Original file line number | Diff line number | Diff line change |
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import { useCallback, useEffect, useRef, useState } from "react"; | ||
import { State } from "../types"; | ||
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export const useVeadotube = ( | ||
host: string, | ||
port: string, | ||
onCloseCallback: (e: Event) => void | ||
) => { | ||
const [connectionStarted, setConnectionStarted] = useState<boolean>(false); | ||
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const [states, setStates] = useState<State[]>([]); | ||
const [currentStateId, setCurrentStateId] = useState<string | null>(null); | ||
const websocketRef = useRef<WebSocket>(); | ||
const messageReceived = useRef(false); | ||
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const INITIAL_LIST_EVENT_PAYLOAD = 'nodes: {"event": "list"}'; | ||
const STATE_EVENTS_PAYLOAD = (input: string) => { | ||
return `nodes: { | ||
"event": "payload", | ||
"type": "stateEvents", | ||
"id": "mini", | ||
"payload": ${input} | ||
}`; | ||
}; | ||
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const start = () => { | ||
setConnectionStarted(true); | ||
}; | ||
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const setCurrentState = (stateId: string) => { | ||
websocketRef.current?.send( | ||
STATE_EVENTS_PAYLOAD(`{"event": "set", "state": "${stateId}"}`) | ||
); | ||
setCurrentStateId(stateId); | ||
}; | ||
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const onMessage = useCallback((event: MessageEvent<string>) => { | ||
messageReceived.current = true; | ||
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const str = event.data.replace(/.*nodes:/, "").replaceAll("\u0000", ""); | ||
const json = JSON.parse(str); | ||
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if (json.event === "payload") { | ||
const payload = json.payload; | ||
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switch (payload.event) { | ||
case "list": | ||
setStates(payload.states); | ||
for (const state of payload.states) { | ||
websocketRef.current?.send( | ||
STATE_EVENTS_PAYLOAD(`{"event": "thumb", "state": "${state.id}"}`) | ||
); | ||
} | ||
break; | ||
case "thumb": | ||
setStates((prev) => { | ||
const newState = prev.map((state) => { | ||
if (state.id === payload.state) { | ||
return { | ||
...state, | ||
image: { | ||
width: payload.width, | ||
height: payload.height, | ||
data: payload.png, | ||
}, | ||
}; | ||
} | ||
return state; | ||
}); | ||
return newState; | ||
}); | ||
break; | ||
} | ||
} | ||
console.log("json", json); | ||
}, []); | ||
|
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useEffect(() => { | ||
console.log("connectionStarted", connectionStarted) | ||
if (!connectionStarted) { | ||
return; | ||
} | ||
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try { | ||
const websocket = new WebSocket( | ||
`ws://${host}:${port}?n=remote-veadotube` | ||
); | ||
websocketRef.current = websocket; | ||
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websocket.addEventListener("open", () => { | ||
console.log("open"); | ||
websocket.send(INITIAL_LIST_EVENT_PAYLOAD); | ||
websocket.send(STATE_EVENTS_PAYLOAD('{"event": "list"}')); | ||
}); | ||
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websocket.addEventListener("close", (event) => { | ||
console.log("close"); | ||
onCloseCallback(event); | ||
}); | ||
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websocket.addEventListener("error", (event) => { | ||
console.error("error", event); | ||
|
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if (event instanceof Error) { | ||
setConnectionStarted(false); | ||
alert(event.message); | ||
} | ||
}); | ||
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websocket.addEventListener("message", onMessage); | ||
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const timeout = setTimeout(() => { | ||
if (!messageReceived.current) { | ||
websocket.close(); | ||
setConnectionStarted(false); | ||
alert("Connection timed out. No response from server."); | ||
} | ||
}, 3000); | ||
|
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return () => { | ||
websocket.close(); | ||
websocket.removeEventListener("message", onMessage); | ||
websocket.removeEventListener("open", () => {}); | ||
websocket.removeEventListener("close", () => {}); | ||
websocket.removeEventListener("error", () => {}); | ||
clearTimeout(timeout); | ||
}; | ||
} catch (error) { | ||
console.error("error", error); | ||
if (error instanceof Error) { | ||
setConnectionStarted(false); | ||
alert(error.message); | ||
} | ||
} | ||
// eslint-disable-next-line react-hooks/exhaustive-deps | ||
}, [connectionStarted]); | ||
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return { | ||
start, | ||
messageReceived, | ||
states, | ||
currentStateId, | ||
setCurrentState, | ||
}; | ||
}; |