4 files changed, 73 insertions, 0 deletions
diff --git a/users/lib/leap_web_users/engine.rb b/users/lib/leap_web_users/engine.rb
index 7033576..f8ed71c 100644
--- a/users/lib/leap_web_users/engine.rb
+++ b/users/lib/leap_web_users/engine.rb
@@ -7,6 +7,8 @@ require "ruby-srp"
 require "warden/session_serializer"
 require "warden/strategies/secure_remote_password"
 
+require "webfinger"
+
 module LeapWebUsers
   class Engine < ::Rails::Engine
 
diff --git a/users/lib/webfinger.rb b/users/lib/webfinger.rb
new file mode 100644
index 0000000..dd49b41
--- /dev/null
+++ b/users/lib/webfinger.rb
@@ -0,0 +1,6 @@
+module Webfinger
+
+  autoload :HostMetaPresenter, 'webfinger/host_meta_presenter'
+  autoload :UserPresenter, 'webfinger/user_presenter'
+
+end
diff --git a/users/lib/webfinger/host_meta_presenter.rb b/users/lib/webfinger/host_meta_presenter.rb
new file mode 100644
index 0000000..84ab7a9
--- /dev/null
+++ b/users/lib/webfinger/host_meta_presenter.rb
@@ -0,0 +1,30 @@
+require 'uri'
+
+class Webfinger::HostMetaPresenter
+  def initialize(request)
+    @request = request
+  end
+
+  def to_json(options = {})
+    {
+      subject: subject,
+      links: links
+    }.to_json(options)
+  end
+
+  def subject
+    url = URI.parse(@request.url)
+    url.path = ''
+    url.to_s
+  end
+
+  def links
+    { lrdd: { type: 'application/xrd+xml', template: webfinger_template } }
+  end
+
+  protected
+
+  def webfinger_template(path = 'webfinger', query_param='q')
+    "#{subject}/#{path}?#{query_param}={uri}"
+  end
+end
diff --git a/users/lib/webfinger/user_presenter.rb b/users/lib/webfinger/user_presenter.rb
new file mode 100644
index 0000000..329f477
--- /dev/null
+++ b/users/lib/webfinger/user_presenter.rb
@@ -0,0 +1,35 @@
+class Webfinger::UserPresenter
+  include Rails.application.routes.url_helpers
+  attr_accessor :user
+
+  def initialize(user, request)
+    @user = user
+    @request = request
+  end
+
+  def to_json(options = {})
+    {
+      subject: subject,
+      links:   links
+    }.to_json(options)
+  end
+
+  def subject
+    "acct:#{@user.email_address}"
+  end
+
+  def links
+    links = {}
+    links[:public_key] = { type: 'PGP', href: key } if key
+    return links
+  end
+
+  protected
+
+  def key
+    if @user.public_key.present?
+      Base64.encode64(@user.public_key.to_s)
+    end
+  end
+
+end