if (!window.VkStorySaverLib) {
	window.VkStorySaverLib = {
		forMutation: function(mutation) {
			var a, diva, key, prevLink;
			var story = document.body.getElementsByClassName("story_view_row_active")[0];
			if (!story) {
				window.observer.disconnect();
			} else {
				if (story.getElementsByClassName("vk story saver").length) {
					diva = story.getElementsByClassName("vk story saver")[0];
					if (diva.getElementsByTagName("a").length) {
						a = diva.getElementsByTagName("a")[0];
						prevLink = a.href;
					} else {
						a = document.createElement("a");
						a.innerText = "Сохранить";
					}
					key = false;
				} else {
					diva = document.createElement("div");
					diva.className = "vk story saver";
					diva.style.marginLeft = "6px";
					a = document.createElement("a");
					a.innerText = "Сохранить";
					story.getElementsByClassName("story_view_info")[0].appendChild(diva);
					key = true;
				}
				if (document.body.getElementsByClassName("story_view_video").length) {
					if (document.body.getElementsByClassName("story_view_video")[0].currentSrc.indexOf(".mp4") != -1) {
						a.href = document.body.getElementsByClassName("story_view_video")[0].currentSrc;
						if (a.href.indexOf("?") > -1) {
							a.href = a.href.substring(0, a.href.indexOf("?"));}
						a.download = ".mp4";
					}
				} else {
					if (document.body.getElementsByClassName("story_view_photo started").length) {
						if (document.body.getElementsByClassName("story_view_photo started")[0].currentSrc.indexOf(".jpg") != -1) {
							a.href = document.body.getElementsByClassName("story_view_photo started")[0].currentSrc;
							if (a.href.indexOf("?") > -1) {
								a.href = a.href.substring(0, a.href.indexOf("?"));}
							a.download = ".jpg";
						}
					} else {
						if (document.body.getElementsByClassName("story_view_photo").length) {
							if (document.body.getElementsByClassName("story_view_photo")[0].currentSrc.indexOf(".jpg") != -1) {
								a.href = document.body.getElementsByClassName("story_view_photo")[0].currentSrc;
								if (a.href.indexOf("?") > -1) {
									a.href = a.href.substring(0, a.href.indexOf("?"));}
								a.download = ".jpg";
							}
						}
					}
				}
				if (a.href && (a.href != prevLink)) {
					diva.appendChild(a);
				}
			}
		}
	}
}

if (document.body.getElementsByClassName("story_view_row_active").length) {
	if (!document.body.getElementsByClassName("story_view_row_active")[0].getElementsByClassName("vk story saver").length) {
		var diva1 = document.createElement("div");
		diva1.className = "vk story saver";
		diva1.style.marginLeft = "6px";
		document.body.getElementsByClassName("story_view_row_active")[0].getElementsByClassName("story_view_info")[0].appendChild(diva1);
		var target = document.getElementsByClassName("story_view_row_active")[0];
		window.observer = new MutationObserver(function(mutations) {
			mutations.forEach(function(mutation) {
				VkStorySaverLib.forMutation(mutation);
			})
		});
		var config = {
			childList: true,
			characterData: true,
			subtree: true
		};
		observer.observe(target, config);
	}
	var checkFlag = true,
		check = document.body.getElementsByClassName("story_view_row_active")[0];
	if (check) {
		check = check.getElementsByClassName("vk story saver")[0];
		if (check) {
			check = check.getElementsByTagName("a")[0];
			if (check) {
				check = check.href;
				if (check) {
					checkFlag = false;
				}
			}
		}
	}
	if (checkFlag) {
		VkStorySaverLib.forMutation(null);
	}
}