#this helpers file contains lots of helpful little methods

#to make our work with sinatra easier

helpers do

#this defines three helpers, that all test our environment:

#they're called 'development?', 'test?', and 'production?'

[:development, :production, :test].each do |environment|

define_method "#{environment.to_s}?" do

return settings.environment == environment.to_sym

end

end

#this method returns the logged_in hacker

def current_user

#let's look up the Hacker by the id in the session

return Hacker.first(:id => session[:hacker_id]) if session[:hacker_id]

#if we can't find them, just return nil

nil

end

#this method returns true if we're logged in, and false if we're not

def logged_in?

#pretty easy, just check the session

current_user != nil

end

#this helper checks if the current_user is admin, and redirects them if they're not

def admin_only!(opts = {:return => "/"})

#we need to be both logged_in and an admin for this to work

unless logged_in? && current_user.admin?

#if we're not, set an error message

flash[:error] = "Sorry, buddy"

#and get redirected

redirect opts[:return]

end

end

#this method makes sure that we're logged in

def require_login!(opts = {:return => "/"})

#if we're not

unless logged_in?

#set an error message

flash[:error] = "Sorry, buddy"

#and get redirected

redirect opts[:return]

end

end

#this method lets us use an api call as well as logging in

def require_login_or_api!(opts = {:return => "/"})

hacker = Hacker.authenticate(opts[:username], opts[:password])

if hacker

session[:hacker_id] = hacker.id

else

require_login!(opts)

end

end

#gives a gravatar url for an email

def gravatar_url_for email

require 'md5'

"http://www.gravatar.com/avatar/#{MD5::md5(email.downcase)}"

end

end

#this lets us require a whole directory of .rb files!

def require_directory dirname

#we glob every file, and loop through them

Dir.glob("#{File.expand_path(File.dirname(__FILE__))}/#{dirname}/*.rb").each do |f|

#and then require them!

require f

end

end

class String

def to_slug

self.gsub(/[^a-zA-Z _0-9]/, "").gsub(/\s/, "_").downcase

end

end