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const DEFAULT_TIMEOUT = 6e4;
function defaultSerialize(i) {
return i;
}
const defaultDeserialize = defaultSerialize;
const { clearTimeout, setTimeout } = globalThis;
const random = Math.random.bind(Math);
function createBirpc(functions, options) {
const {
post,
on,
off = () => {
},
eventNames = [],
serialize = defaultSerialize,
deserialize = defaultDeserialize,
resolver,
bind = "rpc",
timeout = DEFAULT_TIMEOUT
} = options;
const rpcPromiseMap = /* @__PURE__ */ new Map();
let _promise;
let closed = false;
const rpc = new Proxy({}, {
get(_, method) {
if (method === "$functions")
return functions;
if (method === "$close")
return close;
if (method === "then" && !eventNames.includes("then") && !("then" in functions))
return void 0;
const sendEvent = (...args) => {
post(serialize({ m: method, a: args, t: "q" }));
};
if (eventNames.includes(method)) {
sendEvent.asEvent = sendEvent;
return sendEvent;
}
const sendCall = async (...args) => {
if (closed)
throw new Error(`[birpc] rpc is closed, cannot call "${method}"`);
if (_promise) {
try {
await _promise;
} finally {
_promise = void 0;
}
}
return new Promise((resolve, reject) => {
const id = nanoid();
let timeoutId;
if (timeout >= 0) {
timeoutId = setTimeout(() => {
try {
options.onTimeoutError?.(method, args);
throw new Error(`[birpc] timeout on calling "${method}"`);
} catch (e) {
reject(e);
}
rpcPromiseMap.delete(id);
}, timeout);
if (typeof timeoutId === "object")
timeoutId = timeoutId.unref?.();
}
rpcPromiseMap.set(id, { resolve, reject, timeoutId, method });
post(serialize({ m: method, a: args, i: id, t: "q" }));
});
};
sendCall.asEvent = sendEvent;
return sendCall;
}
});
function close() {
closed = true;
rpcPromiseMap.forEach(({ reject, method }) => {
reject(new Error(`[birpc] rpc is closed, cannot call "${method}"`));
});
rpcPromiseMap.clear();
off(onMessage);
}
async function onMessage(data, ...extra) {
const msg = deserialize(data);
if (msg.t === "q") {
const { m: method, a: args } = msg;
let result, error;
const fn = resolver ? resolver(method, functions[method]) : functions[method];
if (!fn) {
error = new Error(`[birpc] function "${method}" not found`);
} else {
try {
result = await fn.apply(bind === "rpc" ? rpc : functions, args);
} catch (e) {
error = e;
}
}
if (msg.i) {
if (error && options.onError)
options.onError(error, method, args);
post(serialize({ t: "s", i: msg.i, r: result, e: error }), ...extra);
}
} else {
const { i: ack, r: result, e: error } = msg;
const promise = rpcPromiseMap.get(ack);
if (promise) {
clearTimeout(promise.timeoutId);
if (error)
promise.reject(error);
else
promise.resolve(result);
}
rpcPromiseMap.delete(ack);
}
}
_promise = on(onMessage);
return rpc;
}
const cacheMap = /* @__PURE__ */ new WeakMap();
function cachedMap(items, fn) {
return items.map((i) => {
let r = cacheMap.get(i);
if (!r) {
r = fn(i);
cacheMap.set(i, r);
}
return r;
});
}
function createBirpcGroup(functions, channels, options = {}) {
const getChannels = () => typeof channels === "function" ? channels() : channels;
const getClients = (channels2 = getChannels()) => cachedMap(channels2, (s) => createBirpc(functions, { ...options, ...s }));
const broadcastProxy = new Proxy({}, {
get(_, method) {
const client = getClients();
const callbacks = client.map((c) => c[method]);
const sendCall = (...args) => {
return Promise.all(callbacks.map((i) => i(...args)));
};
sendCall.asEvent = (...args) => {
callbacks.map((i) => i.asEvent(...args));
};
return sendCall;
}
});
function updateChannels(fn) {
const channels2 = getChannels();
fn?.(channels2);
return getClients(channels2);
}
getClients();
return {
get clients() {
return getClients();
},
functions,
updateChannels,
broadcast: broadcastProxy,
/**
* @deprecated use `broadcast`
*/
// @ts-expect-error deprecated
boardcast: broadcastProxy
};
}
const urlAlphabet = "useandom-26T198340PX75pxJACKVERYMINDBUSHWOLF_GQZbfghjklqvwyzrict";
function nanoid(size = 21) {
let id = "";
let i = size;
while (i--)
id += urlAlphabet[random() * 64 | 0];
return id;
}
export { DEFAULT_TIMEOUT, cachedMap, createBirpc, createBirpcGroup };