// ==UserScript==
// @name          ImgExt
// @namespace     http://annimon.com/
// @description   You know, it doesn't need to explain
// @match         http://annimon.com/forum/id175734-*
// @version       0.2
// @grant         none
// ==/UserScript==

var links = document.querySelectorAll("a");

for(var i=0; i<links.length; i++) {
	var link = links[i];
	if(link.innerHTML.trim().toLowerCase() == "#pic" && (isValidURL(link.href, "http://savepic.ru/") || isValidURL(link.href, "http://i.imgur.com/"))) {
		var img = document.createElement("img");
		img.src = link.href;
		img.alt = "#pic";
		img.style.width = "100%";
		img.style.height = "100%";
		img.style.maxWidth = "150px";
		img.style.maxHeight = "150px";
		
		var imgLink = document.createElement("a");
		imgLink.href = link.href;
		imgLink.target = "_blank";
		imgLink.appendChild(img);
		
		link.parentNode.replaceChild(imgLink, link);
	}
}

var form = document.querySelector("form[name='mess']");

if(exists(form)) {
	var tags = document.querySelectorAll("table.tags_pan td");
	if(tags.length > 0) {
		var tag = document.createElement("a");
		tag.title = "Изображение"
		tag.href = "javascript:tag('[img]', '[/img]')";
		tag.style.color = "#3a3a3a";
		tag.style.textDecoration = "none";
		tag.innerHTML = "<b>IMG</b>";

		var tag1 = document.createElement("td");
		tag1.appendChild(tag);

		tags[0].parentNode.insertBefore(tag1, tags[1]);
	}
	
	form.addEventListener("submit", function() {
		var msg = document.querySelector("div.texta textarea");
		if(exists(msg)) {
			msg.value = msg.value.replace(/\[img](.*)\[\/img]/g, "[url=$1]#pic[/url]");
		}
	});
}

function exists(obj) {
	if(obj !== null) {
		return true;
	}
	return false;
}

function isValidURL(url, mask) {
	if(url.indexOf(mask) == 0) {
		return true;
	}
	return false;
}