azure-slack-openweather.js

var http = require("http");
var OPENWEATHER_APP_ID = '<your-openweather-api-key>';
var stringify_temperature = function (weather, city) {
  return 'The current temperature at '
  + city
  + ' is '
  + (parseFloat(JSON.parse(weather).main.temp) - 273)
  .toFixed(2)
  .toString();
}

module.exports = function (context, req) {
  context.log('Node.js HTTP trigger function processed a request. RequestUri=%s', req.originalUrl);
  
  if (req.query.command != '/temperature') {
    context.res = {
      status: 403,
      body: "Incorrect command: " + req.query.command
    }
    
    context.done();
    return;
  }
  
  if (!req.query.text) {
    context.res = {
      status: 403,
      body: "Requires argument CITY"
    }
    
    context.done();
    return;
  }
  
  var city = req.query.text;
  var options = {
    host: 'api.openweathermap.org',
    path: '/data/2.5/weather?q=' +
    city + '&appid=' +
    OPENWEATHER_APP_ID
  };
  
  callback = function (response) {
    var result = '';
    response.on('data', function (chunk) {
      result += chunk;
    });
    
    response.on('end', function () {
      console.log(result);
      context.res = {
        // status: 200, /* Defaults to 200 */
        body: stringify_temperature(result, city)
      };
      context.done();
    });
  }
  
  http.request(options, callback).end();
};