ycChrome/background.html at master · abhiasawa/ycChrome · GitHub

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<html>
<head>
<script>
// First run? Set these
if(localStorage.getItem('hnNROnline') === null)
{
	localStorage.setItem('hnNROnline', 'yes');
}

if(localStorage.getItem('classObjs') === null){
	var defaultObj = {
				'notInterested': { wordCounts: {}, hashes: [], titleList: [] },
				'interested': { wordCounts:{}, hashes: [], titleList: [] }
			};
	localStorage.setItem('classObjs', JSON.stringify(defaultObj));
}

// Page basis
var online = localStorage.getItem('hnNROnline');
var newsUrl = new RegExp("news.ycombinator.com", "i");

function setPageAction(tab)
{
	var iconImg = "icon.png";
	if(online === "yes")
	{
		iconImg = "iconOff.png";
		title = "Offline"
		online = "no";
	}
	else
	{
		online = "yes";
		title = "Our recommender is online!"
	}
	chrome.pageAction.setIcon({tabId: tab.id, path: iconImg});
	chrome.pageAction.setTitle({tabId: tab.id, title: title});
	localStorage.setItem('hnNROnline', online);
}

chrome.tabs.onUpdated.addListener(function(tabId, changeInfo, tab){
	if(tab.url.match(newsUrl))
	{
		if(changeInfo.status === "complete")
		{
			chrome.pageAction.show(tabId);
		}
		else
		{
			chrome.pageAction.hide(tabId);
		}

		setPageAction(tab);
	}
});

chrome.pageAction.onClicked.addListener(function(tab) {
	setPageAction(tab);
});

chrome.extension.onRequest.addListener(function(messageData, sender, sendResponse){
	var response = {}

	switch(messageData.request)
	{
		case "available":
			if(!messageData.value)
			{
				response.status = online;
			}
			else
			{
				online = messageData.value
				localStorage.setItem('hnNROnline', online);
			}
		break;
		case "localStorage":
			if(messageData.op === "get")
			{
				response[messageData.key] = localStorage.getItem(messageData.key);
			}
			else if(messageData.op === "set")
			{
				localStorage.setItem(messageData.key, messageData.value);
			}
			else if(messageData.op === "remove")
			{
				localStorage.removeItem(messageData.key);
			}
		break;
		default:
			response.statusMessage = "I don't know how to respond";
	}
	sendResponse(response);
});

/*
// Create a simple text notification:
var notification = webkitNotifications.createNotification(
  '48.png',  // icon url - can be relative
  'Hello!',  // notification title
  'Lorem ipsum...'  // notification body text
);

// Or create an HTML notification:
var notification = webkitNotifications.createHTMLNotification(
  'notification.html'  // html url - can be relative
);

// Then show the notification.
notification.show();
*/
 </script>
</head>

<body>
</body>
</html>