MagicMirror/js/news/news.js
2015-10-19 00:42:34 -04:00

123 lines
2.8 KiB
JavaScript

// 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: 'http://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
}
news.buildQueryString = function (feed) {
return this._yqURL + this._yqlQS + '\'' + encodeURIComponent(feed) + '\'';
}
news.fetchNews = function () {
// Reset the news feed
this.newsItems = [];
this.feed.forEach(function (_curr) {
var _yqUrlString = this.buildQueryString(_curr);
this.fetchFeed(_yqUrlString);
}.bind(this));
}
news.fetchFeed = function (yqUrl) {
$.ajax({
type: 'GET',
datatype:'jsonp',
url: yqUrl,
success: function (data) {
this.parseFeed(data.query.results.item);
}.bind(this),
error: function () {
}
});
}
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;
}
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), 30000);
} 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);
}
news.init = function () {
if (this.feed === null || this.feed instanceof Array) {
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);
}