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/* eslint-disable no-unused-vars */
/*
build a bridge between UI and audio player
audio player has 2 modes, but share same protocol: front and background.
* front: audio player and UI are in same environment
* background: audio player is in background page.
*/
function getFrontPlayer() {
return window.threadPlayer;
}
function getBackgroundPlayer() {
return chrome.extension.getBackgroundPage().threadPlayer;
}
function getBackgroundPlayerAsync(callback) {
(chrome || browser).runtime.getBackgroundPage((w) => {
callback(w.threadPlayer);
});
}
function getPlayer(mode) {
if (mode === 'front') {
return getFrontPlayer();
}
if (mode === 'background') {
return getBackgroundPlayer();
}
return undefined;
}
function getPlayerAsync(mode, callback) {
if (mode === 'front') {
const player = getFrontPlayer();
return callback(player);
}
if (mode === 'background') {
return getBackgroundPlayerAsync(callback);
}
return undefined;
}
const frontPlayerListener = [];
function addFrontPlayerListener(listener) {
frontPlayerListener.push(listener);
}
function addBackgroundPlayerListener(listener) {
return (chrome || browser).runtime.onMessage.addListener(
(msg, sender, res) => {
if (!msg.type.startsWith('BG_PLAYER:')) {
return null;
}
return listener(msg, sender, res);
},
);
}
function addPlayerListener(mode, listener) {
if (mode === 'front') {
return addFrontPlayerListener(listener);
}
if (mode === 'background') {
return addBackgroundPlayerListener(listener);
}
return null;
}
function frontPlayerSendMessage(message) {
if (frontPlayerListener !== []) {
frontPlayerListener.forEach((listener) => {
listener(message);
});
}
}
function backgroundPlayerSendMessage(message) {
(chrome || browser).runtime.sendMessage(message);
}
function playerSendMessage(mode, message) {
if (mode === 'front') {
frontPlayerSendMessage(message);
}
if (mode === 'background') {
backgroundPlayerSendMessage(message);
}
}
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