<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title>Changelog | webretro</title>
		<style>
			body {
				color: white;
				background-color: #101010;
				font-family: sans-serif;
				text-align: center;
			}
			
			p.breaker {
				margin-top: 100px;
			}
			
			#changelog {
				white-space: pre;
			}
		</style>
	</head>
	<body>
		<h1>Changelog | webretro</h1>
		<p class="breaker"></p>
		<div id="changelog">Loading changelog...</div>
		<p class="breaker"></p>
		<script type="text/javascript">
		
		var webretroVersion = 6.5;
		var latestVersion;
		var infoJsonUrl = "https://cdn.jsdelivr.net/gh/BinBashBanana/webretro/assets/info.json";
		var changelogDiv = document.getElementById("changelog");
		
		function grab(url, type, success, fail) {
			var req = new XMLHttpRequest();
			req.open("GET", url, true);
			req.overrideMimeType("text/plain; charset=x-user-defined");
			req.responseType = type;
			req.timeout = 8000;
			req.onload = function() {
				if (req.status >= 400) {
					if (fail) fail(req.status);
				} else {
					if (success) success(this.response);
				}
			}
			req.onerror = function() {
				if (fail) fail(0);
			}
			req.ontimeout = function() {
				if (fail) fail(0);
			}
			req.send();
		}
		
		function failure(error) {
			changelogDiv.textContent = "Failed to load changelog. Try reloading the page.";
			throw error;
		}
		
		grab(infoJsonUrl, "text", function(text) {
			try {
				var updateObj = JSON.parse(text);
				if (updateObj.webretro) {
					changelogDiv.textContent = "";
					latestVersion = updateObj.webretro;
					var versions = Object.keys(updateObj.versions).reverse();
					
					for (var i = 0; i < versions.length; i++) {
						var ver = parseFloat(versions[i]);
						
						var elVer = document.createElement("h3");
						elVer.textContent = "v" + ver.toFixed(1);
						if (ver == latestVersion) elVer.textContent += " (Latest Version)";
						if (ver == webretroVersion) elVer.textContent += " (Installed Version)";
						changelogDiv.appendChild(elVer);
						
						var elList = document.createElement("div");
						elList.textContent = "- " + updateObj.versions[versions[i]].changeList.join("\n- ");
						changelogDiv.appendChild(elList);
					}
				} else {
					failure();
				}
			} catch (e) {
				failure(e);
			}
		}, function(e) {
			failure(e);
		});
		
		</script>
	</body>
</html>

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