fedifeed/lib/convert.js
2017-04-30 14:44:32 -05:00

139 lines
3.1 KiB
JavaScript

var pug = require('pug');
var FeedParser = require('feedparser');
var ejs = require('ejs');
var fs = require('fs');
var template = ejs.compile(fs.readFileSync('./lib/template.ejs','utf8'));
// source the files
module.exports = function(stream,opts,callback){
var callback = callback;
var opts = opts;
if (typeof opts == 'function'){
callback = opts;
opts = {};
}
// convert s from atom feed to a full html page for rendering
breakDown(stream,function(er,data){
if (er) {
return callback(er);
}
callback(null,buildUp(data,opts));
});
}
// break the xml into json
function breakDown(stream,callback){
var spent = false;
function cbOnce(er,data){
if (!spent){
callback(er,data);
spent = true;
}
}
stream.on('error',cbOnce);
var feedparser = new FeedParser();
feedparser.on('error', cbOnce);
stream.pipe(feedparser)
feedparser.items = [];
feedparser.on('readable', function () {
// This is where the action is!
var stream = this; // `this` is `feedparser`, which is a stream
var items = [];
var item;
while (item = stream.read()) {
feedparser.items.push(item);
}
});
feedparser.on('end',function(er){cbOnce(null,feedparser)});
}
// hydrate the json to html
function buildUp(jsonObj,opts){
// assign opts to the obj
jsonObj.opts = opts||{};
// add some links to the item for avatar et cetera
jsonObj.items.forEach(function(item){
// get date
item.stringDate = isoDateToEnglish(item.date);
item.content = getH(item,'atom:content');
// get enclosures
item.enclosures = [];
if (item["activity:object"] && item["activity:object"].link){
item["activity:object"].link.forEach(function(link){
if (!link['@']){return;} // avoid keyerror
var rel = link['@'].rel;
var href = link['@'].href;
if (rel == 'enclosure'){
item.enclosures.push(href);
}
});
}
// get author info
item.author = {};
var _author = item.meta['atom:author'];
if ( item['activity:object'] && item['activity:object'].author){
_author = item['activity:object'].author;
}
// item.author.name = _author.name.# or empty string
item.author.name = getH(_author,'name');
item.author.uri = getH(_author,'uri');
item.author.fullName = getH(_author,'email');
item.author.displayName = getH(_author,'poco:displayname');
var authorLinks = _author.link || [];
authorLinks.forEach(function(link){
if (!link['@']){return;} // avoid keyerror
var rel = link['@'].rel;
var href = link['@'].href;
if (rel == 'avatar'){
item.author.avatar = href;
}else if(rel == 'alternate'){
item.author.alternate = href;
}
});
});
return template(jsonObj);
}
// get obj[key]['#'] or ''
function getH(obj,key){
if (!obj[key]){return ''}
return obj[key]['#']||'';
}
function isoDateToEnglish(d){
var d = d;
if (typeof d == 'object'){
d = d.toISOString();
}
var dt = d.split(/[t\-]/ig);
var months = [ "January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December" ];
return months[Number(dt[1])-1] +' '+dt[2]+ ', '+dt[0];
}