fixer-io-node/server.js

A module that interacts with fixer.io API to get foreign exchanges rates.

var http = require('https');

module.exports = {
    latest: function(str){
        return new Promise(function(resolve, reject){
            if(str){
                apiRequest(str, resolve, reject);
            }
        });
    },
    
    base: function(base){
        var str = "latest?base="+base;
        
        return new Promise(function(resolve, reject){
            if(base){
                apiRequest(str, resolve, reject);
            }
        });
    },
    
    historical: function(date){
        return new Promise(function(resolve, reject){
            if(date){
                apiRequest(date, resolve, reject);
            }
        });
    },
    
    specificRate: function(curr1, curr2){
        var currency = "latest?symbols="+curr1+","+curr2;
        return new Promise(function(resolve, reject){
            apiRequest(currency, resolve, reject);
        });
    }
}

function apiRequest(str, resolve, reject){
    var url = {
        host: "api.fixer.io",
        path: "/"+str,
        headers: {
            'Content-Type': 'application/json'
        }
    }
    
    http.get(url, function(response){
        var body = [];
        
        response.on('data', function(chunk){
            body.push(chunk);
        });
        
        response.on('end', function(){
            if(response.statusCode === 200){
                var result = Buffer.concat(body).toString();
                var newResult = JSON.parse(result);
                resolve(newResult);
            }else{
                reject("Promise rejection. An error has occurred, please fix the error.")
            }
        })
    });
}