Initial commit of V2.

old_version/js/news/news.js

@@ -0,0 +1,152 @@
+// A lot of this code is from the original feedToJson function that was included with this project
+// The new code allows for multiple feeds to be used but a bunch of variables and such have literally been copied and pasted into this code and some help from here: http://jsfiddle.net/BDK46/
+// The original version can be found here: http://airshp.com/2011/jquery-plugin-feed-to-json/
+var news = {
+	feed: config.news.feed || null,
+	newsLocation: '.news',
+	newsItems: [],
+	seenNewsItem: [],
+	_yqURL: 'https://query.yahooapis.com/v1/public/yql',
+	_yqlQS: '?format=json&q=select%20*%20from%20rss%20where%20url%3D',
+	_cacheBuster: Math.floor((new Date().getTime()) / 1200 / 1000),
+	_failedAttempts: 0,
+	fetchInterval: config.news.fetchInterval || 60000,
+	updateInterval: config.news.interval || 5500,
+	fadeInterval: 2000,
+	intervalId: null,
+	fetchNewsIntervalId: null
+}
+
+/**
+ * Creates the query string that will be used to grab a converted RSS feed into a JSON object via Yahoo
+ * @param  {string} feed The original location of the RSS feed
+ * @return {string}      The new location of the RSS feed provided by Yahoo
+ */
+news.buildQueryString = function (feed) {
+
+	return this._yqURL + this._yqlQS + '\'' + encodeURIComponent(feed) + '\'';
+
+}
+
+/**
+ * Fetches the news for each feed provided in the config file
+ */
+news.fetchNews = function () {
+
+	// Reset the news feed
+	this.newsItems = [];
+
+	this.feed.forEach(function (_curr) {
+
+		var _yqUrlString = this.buildQueryString(_curr);
+		this.fetchFeed(_yqUrlString);
+
+	}.bind(this));
+
+}
+
+/**
+ * Runs a GET request to Yahoo's service
+ * @param  {string} yqUrl The URL being used to grab the RSS feed (in JSON format)
+ */
+news.fetchFeed = function (yqUrl) {
+
+	$.ajax({
+		type: 'GET',
+		datatype:'jsonp',
+		url: yqUrl,
+		success: function (data) {
+
+			if (data.query.count > 0) {
+				this.parseFeed(data.query.results.item);
+			} else {
+				console.error('No feed results for: ' + yqUrl);
+			}
+
+		}.bind(this),
+		error: function () {
+			// non-specific error message that should be updated
+			console.error('No feed results for: ' + yqUrl);
+		}
+	});
+
+}
+
+/**
+ * Parses each item in a single news feed
+ * @param  {Object} data The news feed that was returned by Yahoo
+ * @return {boolean}      Confirms that the feed was parsed correctly
+ */
+news.parseFeed = function (data) {
+
+	var _rssItems = [];
+
+	for (var i = 0, count = data.length; i < count; i++) {
+
+		_rssItems.push(data[i].title);
+
+	}
+
+	this.newsItems = this.newsItems.concat(_rssItems);
+
+	return true;
+
+}
+
+/**
+ * Loops through each available and unseen news feed after it has been retrieved from Yahoo and shows it on the screen
+ * When all news titles have been exhausted, the list resets and randomly chooses from the original set of items
+ * @return {boolean} Confirms that there is a list of news items to loop through and that one has been shown on the screen
+ */
+news.showNews = function () {
+
+	// If all items have been seen, swap seen to unseen
+	if (this.newsItems.length === 0 && this.seenNewsItem.length !== 0) {
+
+		if (this._failedAttempts === 20) {
+			console.error('Failed to show a news story 20 times, stopping any attempts');
+			return false;
+		}
+
+		this._failedAttempts++;
+
+		setTimeout(function () {
+			this.showNews();
+		}.bind(this), 3000);
+
+	} else if (this.newsItems.length === 0 && this.seenNewsItem.length !== 0) {
+		this.newsItems = this.seenNewsItem.splice(0);
+	}
+
+	var _location = Math.floor(Math.random() * this.newsItems.length);
+
+	var _item = news.newsItems.splice(_location, 1)[0];
+
+	this.seenNewsItem.push(_item);
+
+	$(this.newsLocation).updateWithText(_item, this.fadeInterval);
+
+	return true;
+
+}
+
+news.init = function () {
+
+	if (this.feed === null || (this.feed instanceof Array === false && typeof this.feed !== 'string')) {
+		return false;
+	} else if (typeof this.feed === 'string') {
+		this.feed = [this.feed];
+	}
+
+	this.fetchNews();
+	this.showNews();
+
+	this.fetchNewsIntervalId = setInterval(function () {
+		this.fetchNews()
+	}.bind(this), this.fetchInterval)
+
+	this.intervalId = setInterval(function () {
+		this.showNews();
+	}.bind(this), this.updateInterval);
+
+}