I'm building a content middleware which gather contents from our external publishers. The publishers will share their contents either in rss or json and the key/value field would be different from each other. To make thing easier, I created a config file where I can pre-defined the key/value and the feed type. The problem is, how can I dynamically return this config value based on publishers name.
Example: To get Publisher #1 feed type, I just can use config.articles. .url_feed .url_feed
my config file /config/index.js
module.exports = {
batch:100,
mysql: {
database: process.env.database,
host: process.env.host,
username: process.env.username,
password: process.env.password
},
articles:{
rojak_daily:{ // Publisher 1
url: 'xxx',
url_feed: 'rss',
id: null,
Name: 'title',
Description: 'description',
Link: 'link',
DatePublishFrom: 'pubDate',
LandscapeImage: 's3image',
SiteName: 'Rojak Daily',
SiteLogo: null
},
rojak_weekly:{ // publisher 2
url: 'xxx',
url_feed: 'json',
id: null,
Name: 'Name',
Description: 'Desc',
Link: 'link',
DatePublishFrom: 'pubDate',
LandscapeImage: 's3image',
SiteName: 'Rojak Weekly',
SiteLogo: null
}
}
}
my main application script
const config = require('@config'); // export from config file
class Main {
constructor(){
this.publishers = ['rojak_daily','rojak_weekly'];
}
// Main process
async startExport(){
try{
for(let publisher of this.publishers){
const feedType = await this.getFeedType(publisher)
const result = (feedType == 'rss')? await this.rss.start(publisher): await this.json.start(publisher)
return result
}
}catch(err){
console.log("Error occured: ", err)
}
}
// Get feed type from config
async getFeedType(publisher){
return await config.articles.rojak_daily.url_feed;
// this only return publisher 1 url feed.
// my concern is to dynamically passing variable
// into this config file (example: config.articles.<publisher>.url_feed)
}
}
module.exports = Main
async getFeedType(publisher){
return await config.articles[publisher].url_feed;
}
You can access properties of objects by variable
You could either loop over the articles by using Object.entries(articles)
or Object.values(articles)
in conjunction with Array.prototype.forEach()
, or since you already have the name of the publisher you could access that entry with config.articles[publisher].url_feed
, like so:
const config = { articles: { rojak_daily: { // Publisher 1 url: 'xxx', url_feed: 'rss', id: null, Name: 'title', Description: 'description', Link: 'link', DatePublishFrom: 'pubDate', LandscapeImage: 's3image', SiteName: 'Rojak Daily', SiteLogo: null }, rojak_weekly: { // publisher 2 url: 'xxx', url_feed: 'json', id: null, Name: 'Name', Description: 'Desc', Link: 'link', DatePublishFrom: 'pubDate', LandscapeImage: 's3image', SiteName: 'Rojak Weekly', SiteLogo: null } } } const publishers = ['rojak_daily', 'rojak_weekly'] function getFeedType(publisher) { return config.articles[publisher].url_feed; } publishers.forEach(publisher => console.log(getFeedType(publisher)));
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