/
feed.js
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/
feed.js
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var conf = require('./config');
var Q = require('q');
var request = require('request');
var RSS = require('rss');
function Feed() {
this.token = conf.get('ACCESS_TOKEN');
this.allowed_types = [
'posts',
'tagged',
'promotable_posts'
];
}
Feed.prototype.fetchGraph = function(id, type) {
var deferred = Q.defer();
var edge = this.allowed_types.indexOf(type) != -1 ? type : 'feed';
var options = {
url: 'https://graph.facebook.com/v2.3/' + id + '/' + edge,
timeout: conf.get('TIMEOUT'),
qs: {
access_token: this.token
}
};
request(options, function(err, res, body) {
if (err) {
deferred.reject(err.code);
} else if (res.statusCode !== 200) {
deferred.reject(JSON.parse(body));
} else {
deferred.resolve(JSON.parse(body));
}
});
return deferred.promise;
};
Feed.prototype.generateFeed = function(res) {
try {
var data = res.data[0];
var pageMeta = data.to ? data.to.data[0] : data.from;
var feedOptions = {
title: pageMeta.name,
pubDate: data.updated_time,
language: 'th',
site_url: 'https://www.facebook.com/' + pageMeta.id,
feed_url: 'http://facefeed.herokuapp.com/' + pageMeta.id,
ttl: 10
};
var feed = new RSS(feedOptions);
res.data.forEach(function(item) {
var body = item.message || item.story || '';
feed.item({
title: body.substring(0, 140),
description: body,
url: item.link || 'https://www.facebook.com/' + item.id,
guid: item.id,
});
});
return feed.xml();
}
catch (ex) {
return 'problem generating feed ' + ex;
}
};
module.exports = Feed;