hackernews2nntp/lib/livedata.js

Post Hacker News Stories & Comments to an NNTP Server

// Generated by CoffeeScript 1.8.0
(function() {
  var Q, http_get, request, util;

  util = require('util');

  Q = require('q');

  request = require('request');

  exports.conf = {
    url: 'https://hacker-news.firebaseio.com/v0/%s.json'
  };

  http_get = function(url) {
    var deferred, opt;
    deferred = Q.defer();
    opt = {
      url: url
    };
    request.get(opt, function(err, res, body) {
      if (err) {
        err.message = "" + url + ": " + err.message;
        deferred.reject(err);
        return;
      }
      if (res.statusCode === 200) {
        return deferred.resolve(body);
      } else {
        return deferred.reject(new Error("HTTP " + res.statusCode));
      }
    });
    return deferred.promise;
  };

  exports.maxitem = function() {
    return http_get(util.format(exports.conf.url, 'maxitem')).then(function(body) {
      var maxitem;
      maxitem = parseInt(body) || 0;
      if (maxitem < 1) {
        throw new Error("maxitem <= 0");
      } else {
        return maxitem;
      }
    });
  };

  exports.top100 = function() {
    return http_get(util.format(exports.conf.url, 'topstories')).then(function(body) {
      var arr, err;
      try {
        arr = JSON.parse(body);
      } catch (_error) {
        err = _error;
        throw new Error("invalid json: " + err.message);
      }
      if (util.isArray(arr) && arr.length > 0) {
        return arr;
      } else {
        throw new Error('a non-empty array is required');
      }
    });
  };

}).call(this);