EmailToFace

Installation

Easy:

[sudo|rvm] gem install email_to_face

Using Bundler:

gem "email_to_face"

Facebok Graph API

The Graph API is the simple, slick new interface to Facebook's data. Using it to get a user image with EmailToFace is quite straightforward. See developers.facebook.com/docs/authentication/ for more information on obtaining access tokens.

@email_to_face = EmailToFace::App.new(:facebook_user_token => oauth_access_token)
@email_to_face.convert('user@email.com')
=> { :url => 'https://graph.facebook.com/111111111/picture?type=large' }

Gravatar

If the user is not found via the Facebook Graph API, or if an access token is not passed, the Gravatar API will be called.

@email_to_face = EmailToFace::App.new()
@email_to_face.convert('user@email.com')
=> { :url => 'http://www.gravatar.com/avatar.php?gravatar_id=c44b0f24cfce9aacc7c1969c5666cfae&d=404&s=180' }

Face.com

If face.com credentials are passed, the convert method will return the location of the users's face in the image. See developers.face.com for more information.

@email_to_face = EmailToFace::App.new(
    :facebook_user_token => oauth_access_token,
    :face_api_key        => key,
    :face_api_secret     => secret)

@email_to_face.convert('user@email.com')
=> { :url => 'https://graph.facebook.com/111111111/picture?type=large', :x => 48.89, :y => 38.1 }

Optional settings

By default Gravatar always returns square centered images. If you want to use face.com to find the center of the face anyway, you can use the :use_face_for_gravatar option (default is false):

@email_to_face = EmailToFace::App.new(
    :use_face_for_gravatar  => true,
    :face_api_key           => key,
    :face_api_secret        => secret)

@email_to_face.convert('user@email.com')
=> { :url => 'http://www.gravatar.com/avatar.php?gravatar_id=c44b0f24cfce9aacc7c1969c5666cfae&d=404&s=180', :x => 48.89, :y => 38.1 }

The Facebook Graph API lets you specify the picture size you want with the type argument, which should be one of square (50x50), small (50 pixels wide, variable height), normal (100 pixels wide, variable height), and large (180 pixels wide, variable height). You can assign this via the :facebook_image_type option (default is 'large', Gravatar will match):

@email_to_face = EmailToFace::App.new(
    :facebook_image_type => 'small'
    :facebook_user_token => oauth_access_token
    :)

@email_to_face.convert('facebook@email.com')
=> { :url => 'https://graph.facebook.com/111111111/picture?type=small' }

@email_to_face.convert('gravatar@email.com')
=> { :url => 'http://www.gravatar.com/avatar.php?gravatar_id=c44b0f24cfce9aacc7c1969c5666cfae&d=404&s=50' }