62 lines
1.5 KiB
JavaScript
62 lines
1.5 KiB
JavaScript
"use strict";
|
|
|
|
window.VK = window.VK ?? {};
|
|
|
|
const bus = new Map();
|
|
|
|
window.VK.bus = {
|
|
on(type, handler) {
|
|
const handlers = bus.get(type) ?? new Set();
|
|
handlers.add(handler);
|
|
bus.set(type, handlers);
|
|
return () => handlers.delete(handler);
|
|
},
|
|
emit(type, payload) {
|
|
for (const handler of bus.get(type) ?? []) {
|
|
try {
|
|
handler(payload);
|
|
} catch (error) {
|
|
console.error(`[bus] ${type} handler failed`, error);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
async function request(path, options) {
|
|
const response = await fetch(path, options);
|
|
let body;
|
|
try {
|
|
body = await response.json();
|
|
} catch {
|
|
throw new Error(`request failed (${response.status})`);
|
|
}
|
|
if (!body.ok) throw new Error(body.error ?? `request failed (${response.status})`);
|
|
return body.result;
|
|
}
|
|
|
|
window.VK.api = {
|
|
get: path => request(path),
|
|
post: (path, data) =>
|
|
request(path, {
|
|
method: "POST",
|
|
headers: { "Content-Type": "application/json" },
|
|
body: JSON.stringify(data ?? {})
|
|
})
|
|
};
|
|
|
|
window.VK.connectEvents = function connectEvents() {
|
|
const source = new EventSource("/api/events");
|
|
|
|
source.onmessage = message => {
|
|
let data;
|
|
try {
|
|
data = JSON.parse(message.data);
|
|
} catch {
|
|
return;
|
|
}
|
|
window.VK.bus.emit("event", data);
|
|
};
|
|
|
|
source.onerror = () => window.VK.bus.emit("sse-error");
|
|
};
|