lbry.tech/server.js

// server.js

// env variables
require('dotenv').config();
// Async
var async = require("async");
// Express etc
var sslRedirect = require('heroku-ssl-redirect');
var express = require('express');
var path = require('path');
var serveStatic = require('serve-static');
var request = require('request');
var cors = require('cors');
// Cron
var CronJob = require('cron').CronJob;
// Github API
var octokit = require('@octokit/rest')();
// Redis
var redis = require("redis"),
redisClient = redis.createClient(process.env.REDISCLOUD_URL);

app = express();
app.use(serveStatic(__dirname + "/.vuepress/dist"));

app.use(cors());

// enable ssl redirect
app.use(sslRedirect(['other','development', 'staging', 'production']));

app.get('/forward', function(req, res) {

  if(typeof req.query.method != "undefined") {

    // We should whitelist the query parameters here

    // Hardcode the wallet_send amount to be 0.01 always
    if(req.query.method == "wallet_send") {
      req.query.amount = 0.01;
    }

    request({
      url: "http://daemon.lbry.tech",
      qs: req.query
    }, function(error, response, body) {
      // Should we parse the body before forwarding?
      res.setHeader('Content-Type', 'application/json');
      res.send(body);
    })

  }

});

app.get('/github-feed', function(req, res) {

  redisClient.zrevrange('events', 0, 9, function(err, reply) {

    var events = [];

    reply.forEach(function(item) {
      events.push(JSON.parse(item));
    });
    
    res.json(events);

  });

});

var port = process.env.PORT || 8080;
app.listen(port);

console.log('server started '+ port);

function updateGithubFeed() {

  octokit.activity.getEventsForOrg({
    org: 'lbryio',
    per_page: 20,
    page: 1
  }).then(function({data}) {

    async.eachSeries(data, function(item, callback) {

      var eventString = JSON.stringify(item);

      redisClient.zrank('events', eventString, function(err, reply) {
        
        if(reply == null) {

          redisClient.zadd('events', item.id, eventString, callback);

        } else {

          callback();

        }

      });

    }, function() {

      // Keep the latest 50 events
      redisClient.zremrangebyrank('events', 0, -51);

      console.log('Updated Github feed');

    });

  });

}

// Update Github feed every minute
new CronJob("0 * * * * *", updateGithubFeed, null, true, 'America/Los_Angeles');