Module: FGraph::Rails::FGraphHelper

Defined in:
lib/fgraph/rails/fgraph_helper.rb

Instance Method Summary collapse

Instance Method Details

#fgraph_access_token ⇒ Object 



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# File 'lib/fgraph/rails/fgraph_helper.rb', line 53

def fgraph_access_token
	return unless fgraph_session
	fgraph_session['access_token']
end

#fgraph_client ⇒ Object

Return FGraph::Client instance initialized with settings set in fgraph.yml. Initialized with :access_token as well if Facebook session exists.



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# File 'lib/fgraph/rails/fgraph_helper.rb', line 75

def fgraph_client
  return @fgraph_client if @fgraph_client
  
  @fgraph_client = FGraph::Client.new(
	 :client_id => fgraph_config['app_id'],
	 :client_secret => fgraph_config['app_secret'],
	 :access_token => fgraph_access_token
  )
end

#fgraph_config ⇒ Object

Access FGraph.config initialized with values set in [RAILS_ROOT]/config/fgraph.yml.



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# File 'lib/fgraph/rails/fgraph_helper.rb', line 6

def fgraph_config
  FGraph.config || {}
end

#fgraph_current_user ⇒ Object

Currently logged in facebook user



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# File 'lib/fgraph/rails/fgraph_helper.rb', line 63

def fgraph_current_user
  return @fgraph_current_user if @fgraph_current_user
  @fgraph_current_user = fgraph_client.me 
end

#fgraph_logged_in? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fgraph/rails/fgraph_helper.rb', line 58

def fgraph_logged_in?
  return true if fgraph_session and fgraph_access_token
end

#fgraph_picture_url(id, type = nil) ⇒ Object

Type Options

  • square - 50x50 (default)

  • small - 50 pixels wide, variable height

  • normal - 100 pixels wide, variable height

  • large - 200 pixels wide, variable height



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# File 'lib/fgraph/rails/fgraph_helper.rb', line 93

def fgraph_picture_url(id, type=nil)
  id = FGraph.get_id(id)
  url = "http://graph.facebook.com/#{id}/picture"
  url += "?type=#{type}" if type
  url
end

#fgraph_session(app_id = fgraph_config['app_id'], app_secret = fgraph_config['app_secret']) ⇒ Object

Return Facebook session, default to retrieve session from cookies.



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# File 'lib/fgraph/rails/fgraph_helper.rb', line 11

def fgraph_session(app_id = fgraph_config['app_id'], 
  app_secret = fgraph_config['app_secret'])
	
	return @fgraph_session if @fgraph_session
	@fgraph_session = fgraph_session_cookies(app_id, app_secret)
end

#fgraph_session_cookies(app_id = fgraph_config['app_id'], app_secret = fgraph_config['app_secret']) ⇒ Object

Return Facebook session cookies.



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# File 'lib/fgraph/rails/fgraph_helper.rb', line 19

def fgraph_session_cookies(app_id = fgraph_config['app_id'], 
	app_secret = fgraph_config['app_secret'])
			
	return @fgraph_session_cookies if @fgraph_session_cookies
	return if @fgraph_session_cookies == false
			
	 # retrieve session from cookies
	fbs_cookies = request.cookies["fbs_#{app_id}"]
	if app_id.blank? or app_secret.blank? or fbs_cookies.blank?
		return @fgraph_session_cookies = false
	end

	# Parse facebook cookies
	fbs_cookies = CGI.parse(fbs_cookies.gsub(/(^\"|\"$)/, ''))
	session_cookies = {}
	fbs_cookies.each do |key, value|
		session_cookies[key] = value[0]
	end
	
	# Validate session cookies
	cookie_message = ''
	session_cookies_list = session_cookies.sort
	session_cookies_list.each do |cookie|
		cookie_message += "#{cookie[0]}=#{cookie[1]}" if cookie[0] != 'sig'
	end

	# Message digest does not match
	if Digest::MD5.hexdigest(cookie_message + app_secret) != session_cookies['sig']
		@fgraph_session_cookies = false
	end

	@fgraph_session_cookies = session_cookies
end

#fgraph_user ⇒ Object

Alias for fgraph_current_user



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# File 'lib/fgraph/rails/fgraph_helper.rb', line 69

def fgraph_user
  fgraph_current_user
end