var request = require('request')
    , path = require('path')
    , fs = require('fs')
    , url = "https://api.github.com/users/diegopacheco/gists"
    , savepath = 'D:/tmp/gists';

String.prototype.replaceAll = function(search, replace, ignoreCase) {
  if (ignoreCase) {
    var result = [];
    var _string = this.toLowerCase();
    var _search = search.toLowerCase();
    var start = 0, match, length = _search.length;
    while ((match = _string.indexOf(_search, start)) >= 0) {
      result.push(this.slice(start, match));
      start = match + length;
    }
    result.push(this.slice(start));
  } else {
    result = this.split(search);
  }
  return result.join(replace);
}

request({
    url: url,
    method: 'GET',
    headers: { 
        'User-Agent': 'curl/7.30.0',
        'Host': 'api.github.com',
        'Accept': '*/*'
    }
    },function (error, response, body) {
    
    console.log("Github GIST Api Call Status: " + response.statusCode);
    if (!error && response.statusCode == 200) {

        gists = JSON.parse( body );
        gists.forEach( function(gist) {

            console.log( "description: ", gist.description );
            var dir = savepath + '/all/';

            fs.mkdir( dir, function(err){
                for(var file in gist.files){
                    var raw_url = gist.files[file].raw_url;
                    var filename = gist.files[file].filename;

                    console.log( "downloading... " + filename );
                    var saveName = filename.replaceAll('?','').replaceAll('!','').replaceAll('.','').replaceAll('$','').replaceAll(':','');    
                    saveName = saveName.replaceAll('\\','').replaceAll(' ','_');
                    saveName = saveName + '.txt'

                    request(raw_url).pipe(fs.createWriteStream( dir + '/' + saveName));
                }
            });
        });

    }

});