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var audio = (function () {
var audio = {};
var el,
music = [],
current_index = -1;
var links, comment, parent;
var selected = false;
var playing = false;
var built = false;
var initted = false;
audio.init = function () {
if (initted) {
audio.index();
return;
}
comment = document.querySelector("#comment");
parent = document.querySelector("#audio");
audio.index();
audio.build();
el.src = music[0];
initted = true;
};
audio.index = function () {
music = [];
current_index = -1;
var links = document.querySelectorAll("a");
Array.prototype.slice.apply(links).forEach(function (link) {
if (!link.href.match(/\.(mp3|wav|aiff?|m4a|ogg|opus|flac)$/)) return;
link.dataset.index = music.length;
music.push(link);
if (playing && link.href === el.src) {
current_index = parseInt(link.dataset.index);
}
});
if (playing) {
audio.set_cursor();
}
};
audio.build = function () {
if (built) return;
built = true;
el = audio.el = document.createElement("audio");
el.setAttribute("controls", true);
// el.addEventListener("loadeddata", () => { if (selected) el.play() })
el.addEventListener("ended", audio.next);
parent.appendChild(el);
document.body.addEventListener("keydown", audio.keydown);
};
audio.destroy = function () {
el.pause();
el = null;
parent.removeChild(el);
document.body.removeEventListener("keydown", audio.keydown);
built = false;
};
audio.play = function (index) {
playing = true;
current_index = (parseInt(index) + music.length) % music.length;
el.src = music[current_index].href;
el.play();
audio.set_cursor();
};
audio.set_cursor = function () {
selected = document.querySelector(".playing");
if (selected) selected.classList.remove("playing");
if (current_index > -1) {
music[current_index].classList.add("playing");
}
};
audio.prev = function () {
audio.play(current_index - 1);
};
audio.next = function () {
audio.play(current_index + 1);
};
audio.toggle = function () {
if (el.paused) el.play();
else el.pause();
};
audio.keydown = function (e) {
function element_is_text_input(el) {
var tagName = el.tagName.toLowerCase();
return (
(tagName == "input" && el.type == "text") ||
tagName == "textarea" ||
tagName == "button"
);
}
if (element_is_text_input(document.activeElement)) {
return;
}
if (app.typing || e.ctrlKey || e.altKey || e.metaKey) return;
switch (e.keyCode) {
case 37: // left
if (e.shiftKey) {
el.currentTime -= 10;
} else {
audio.prev();
}
break;
case 39: // right
if (e.shiftKey) {
el.currentTime += 10;
} else {
audio.next();
}
break;
case 32: // spacebar
e.preventDefault();
audio.toggle();
break;
}
};
return audio;
})();
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