discourse/lib/auth/facebook_authenticator.rb

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class Auth::FacebookAuthenticator < Auth::ManagedAuthenticator
AVATAR_SIZE ||= 480
def name
"facebook"
end
def enabled?
SiteSetting.enable_facebook_logins
end
def register_middleware(omniauth)
omniauth.provider :facebook,
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setup: lambda { |env|
strategy = env["omniauth.strategy"]
strategy.options[:client_id] = SiteSetting.facebook_app_id
strategy.options[:client_secret] = SiteSetting.facebook_app_secret
strategy.options[:info_fields] = 'name,first_name,last_name,email'
strategy.options[:image_size] = { width: AVATAR_SIZE, height: AVATAR_SIZE }
strategy.options[:secure_image_url] = true
},
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scope: "email"
end
end