Module: Facebooker2::Rails::Controller

Defined in:
lib/facebooker2/rails/controller.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(controller) ⇒ Object 



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# File 'lib/facebooker2/rails/controller.rb', line 8

def self.included(controller)
  controller.helper Facebooker2::Rails::Helpers
  controller.helper_method :current_facebook_user
  controller.helper_method :current_facebook_client
  controller.helper_method :facebook_params
end

Instance Method Details

#current_facebook_client ⇒ Object 



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# File 'lib/facebooker2/rails/controller.rb', line 20

def current_facebook_client
  fetch_client_and_user
  @_current_facebook_client
end

#current_facebook_user ⇒ Object 



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# File 'lib/facebooker2/rails/controller.rb', line 15

def current_facebook_user
  fetch_client_and_user
  @_current_facebook_user
end

#facebook_params ⇒ Object 



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# File 'lib/facebooker2/rails/controller.rb', line 88

def facebook_params
  @facebook_param ||= fb_load_facebook_params
end

#fb_cookie_for_app_id(app_id) ⇒ Object 



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# File 'lib/facebooker2/rails/controller.rb', line 68

def fb_cookie_for_app_id(app_id)
  cookies["fbs_#{app_id}"]
end

#fb_cookie_for_app_id?(app_id) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/facebooker2/rails/controller.rb', line 64

def fb_cookie_for_app_id?(app_id)
  !fb_cookie_for_app_id(app_id).nil?
end

#fb_cookie_hash_for_app_id(app_id) ⇒ Object 



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# File 'lib/facebooker2/rails/controller.rb', line 53

def fb_cookie_hash_for_app_id(app_id)
  return nil unless fb_cookie_for_app_id?(app_id)
  hash={}
  data = fb_cookie_for_app_id(app_id).gsub(/"/,"")
  data.split("&").each do |str|
    parts = str.split("=")
    hash[parts.first] = parts.last
  end
  hash
end

#fb_cookie_signature_correct?(hash, secret) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/facebooker2/rails/controller.rb', line 72

def fb_cookie_signature_correct?(hash,secret)
  sorted_keys = hash.keys.reject {|k| k=="sig"}.sort
  test_string = ""
  sorted_keys.each do |key|
    test_string += "#{key}=#{hash[key]}"
  end
  test_string += secret
  Digest::MD5.hexdigest(test_string) == hash["sig"]
end

#fb_create_user_and_client(token, expires, userid) ⇒ Object 



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# File 'lib/facebooker2/rails/controller.rb', line 40

def fb_create_user_and_client(token,expires,userid)
  client = Mogli::Client.new(token,expires.to_i)
  user = Mogli::User.new(:id=>userid)
  (user,client)        
end

#fb_load_facebook_params ⇒ Object 



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# File 'lib/facebooker2/rails/controller.rb', line 92

def fb_load_facebook_params
  return {} if params[:signed_request].blank?
  sig,encoded_json = params[:signed_request].split(".")
  return {} unless fb_signed_request_sig_valid?(sig,encoded_json)
  ActiveSupport::JSON.decode(fb_signed_request_json(encoded_json)).with_indifferent_access
end

#fb_sign_in_user_and_client(user, client) ⇒ Object 



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# File 'lib/facebooker2/rails/controller.rb', line 46

def (user,client)
  user.client = client
  @_current_facebook_user = user
  @_current_facebook_client = client
  @_fb_user_fetched = true
end

#fb_signed_request_json(encoded) ⇒ Object 



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# File 'lib/facebooker2/rails/controller.rb', line 82

def fb_signed_request_json(encoded)
  chars_to_add = 4-(encoded.size % 4)
  encoded += ("=" * chars_to_add)
  Base64.decode64(encoded)
end

#fb_signed_request_sig_valid?(sig, encoded) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/facebooker2/rails/controller.rb', line 99

def fb_signed_request_sig_valid?(sig,encoded) 
  base64 = Base64.encode64(HMAC::SHA256.digest(Facebooker2.secret,encoded))
  #now make the url changes that facebook makes
  url_escaped_base64 = base64.gsub(/=*\n?$/,"").tr("+/","-_")
  sig ==  url_escaped_base64
end

#fetch_client_and_user ⇒ Object 



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# File 'lib/facebooker2/rails/controller.rb', line 25

def fetch_client_and_user
  return if @_fb_user_fetched
  fetch_client_and_user_from_cookie
  fetch_client_and_user_from_signed_request unless @_current_facebook_client
  @_fb_user_fetched = true
end

#fetch_client_and_user_from_cookie ⇒ Object 



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# File 'lib/facebooker2/rails/controller.rb', line 32

def fetch_client_and_user_from_cookie
  app_id = Facebooker2.app_id
  if (hash_data = fb_cookie_hash_for_app_id(app_id)) and
    fb_cookie_signature_correct?(fb_cookie_hash_for_app_id(app_id),Facebooker2.secret)
    fb_create_user_and_client(hash_data["access_token"],hash_data["expires"],hash_data["uid"])
  end
end

#fetch_client_and_user_from_signed_request ⇒ Object 



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# File 'lib/facebooker2/rails/controller.rb', line 106

def fetch_client_and_user_from_signed_request
  if facebook_params[:oauth_token]
    fb_create_user_and_client(facebook_params[:oauth_token],facebook_params[:expires],facebook_params[:user_id])
  end
end