Music Download Bookmarklet

music.js

javascript:!function() {
    if (window._A_A_A_A_) {
        alert('Already installed');
        return;
    }
    window._A_A_A_A_ = true;
	var _Audio_prototype_play=Audio.prototype.play;
	var _PrevAudio = null;
	var div = document.createElement('div');
	div.style = "position:fixed;left:0;top:0;right:auto;bottom:auto;z-index:2000000000;border:5px solid black;background:white;color:black";
	var a = document.createElement('a');
	a.appendChild(document.createTextNode('?'));
	a.style = "display:block;color:inherit;padding:.1em;max-height:1.2em;line-height:1.2em;text-overflow:ellipsis;overflow:hidden;white-space:nowrap;";
	div.appendChild(a);
	var audioPlacement = document.createElement('div');
	div.appendChild(audioPlacement);
	var input = document.createElement('input');
	input.onfocus = function () {
		input.select();
	};
	div.appendChild(input);
	Audio.prototype.play = function () {
		document.body.appendChild(div);
		if (_PrevAudio && _PrevAudio.parentNode) {
			_PrevAudio.parentNode.removeChild(_PrevAudio);
		}
		_PrevAudio = this;
		audioPlacement.appendChild(_PrevAudio);
		_PrevAudio.setAttribute('style',"display:block!important");
		_PrevAudio.setAttribute('controls', 'controls');
		a.style.width = _PrevAudio.clientWidth + 'px';
		input.style.width = _PrevAudio.clientWidth + 'px';
		a.download = '';
		var src = _PrevAudio.src;
        if (!src) {
			src = _PrevAudio.querySelector('source[type="audio/mp3"]') || _PrevAudio.querySelector('source["type=audio/mpeg"]') || _PrevAudio.querySelector('source["type=audio/mp4"]') || _PrevAudio.querySelector('source]');
			if (src) {
			    src = src.src;
            }
        }
		a.firstChild.data = src;
		a.href = src;
		input.value = '';
		setTimeout(getTitle, 100);
		return _Audio_prototype_play.apply(this, arguments);
	};
	var getText = function (el, txt) {
		txt = txt || [];
        for (var i=0; i<el.childNodes.length; i++) {
            switch (el.childNodes[i].nodeType) {
                case Node.ELEMENT_NODE:
                    getText(el.childNodes[i], txt);
                    break;
                case Node.TEXT_NODE:
	                txt.push(el.childNodes[i].data);
                    break;
            }
        }
        return txt.join('');
	};
	var getTitleFromElements = function (artistSelector, titleSelector) {
		var p = document.querySelector(artistSelector);
		if (p) {
			p = getText(p).replace(/^\s*[-–]\s*|\s*[-–]\s*$/g, '').trim();
		}
		var t = document.querySelector(titleSelector);
		if (t) {
			t = getText(t).replace(/^\s*[-–]\s*|\s*[-–]\s*$/g, '').trim();
		}
		return (p?p:'Unknown Artist') + ' - ' + (t?t:'Unknown Song');
	};
	var getTitle = function () {
	    var title = 'Unknown Artist - Unknown Song';
		if (/(\.|^)yandex\.ru$/.test(document.location.host)) {
			title = getTitleFromElements('.player-controls__track-container .track__artists', '.player-controls__track-container .track__title');
		} else if (/(\.|^)vk\.com$/.test(document.location.host)) {
		    title = getTitleFromElements('.audio_page_player_title_performer', '.audio_page_player_title_song');
        } else if (/(\.|^)ok\.ru$/.test(document.location.host)) {
			title = getTitleFromElements('.mus_player_artist', '.mus_player_song');
        } else if (/(\.|^)zvooq\.com$/.test(document.location.host)) {
			title = getTitleFromElements('.topPanelTimeline-intitleArtist', '.topPanelTimeline-intitleRelease');
        } else if (/(\.|^)karaoke\.ru$/.test(document.location.host)) {
			title = getTitleFromElements('.player-karaoke-ru-copyrights-artists, .select-song .player-song-authors', '.player-karaoke-ru-copyrights-title, .select-song .player-song-title');
			title += ' (караоке)';
        } else if (/(\.|^)itunes\.apple\.com$/.test(document.location.host)) {
			title = getTitleFromElements('.is-now-playing .bordered-list__subtitle, .product-hero-gutter .t-hero-headline', '.is-now-playing .bordered-list__title, .product-hero-gutter .is-active .table__row__name');
        }
		input.value = title;
		_PrevAudio.download = a.download = title + '.mp3';
	}
}();

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