71 lines
1.5 KiB
JavaScript
71 lines
1.5 KiB
JavaScript
import * as parser from "./parser.js";
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let ws;
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let commandQueue = [];
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let current;
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function onMessage(e) {
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if (current) {
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let lines = JSON.parse(e.data);
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let last = lines.pop();
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if (last.startsWith("OK")) {
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current.resolve(lines);
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} else {
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current.reject(last);
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}
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current = null;
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}
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processQueue();
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}
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function onError(e) {
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console.error(e);
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ws = null; // fixme
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}
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function onClose(e) {
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console.warn(e);
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ws = null; // fixme
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}
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function processQueue() {
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if (current || commandQueue.length == 0) { return; }
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current = commandQueue.shift();
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ws.send(current.cmd);
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}
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export function escape(str) {
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return str.replace(/(['"\\])/g, "\\$1");
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}
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export async function command(cmd) {
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if (cmd instanceof Array) { cmd = ["command_list_begin", ...cmd, "command_list_end"].join("\n"); }
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return new Promise((resolve, reject) => {
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commandQueue.push({cmd, resolve, reject});
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processQueue();
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});
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}
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export async function commandAndStatus(cmd) {
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let lines = await command([cmd, "status", "currentsong"]);
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return parser.linesToStruct(lines);
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}
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export async function status() {
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let lines = await command(["status", "currentsong"]);
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return parser.linesToStruct(lines);
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}
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export async function init() {
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return new Promise((resolve, reject) => {
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try {
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ws = new WebSocket("ws://localhost:8080");
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} catch (e) { reject(e); }
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current = {resolve, reject};
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ws.addEventListener("error", onError);
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ws.addEventListener("message", onMessage);
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ws.addEventListener("close", onClose);
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});
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}
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