Allow users to update their OpenPGP pubkey

app/services/user_manager/update_pgp_key.rb

@@ -0,0 +1,24 @@
+module UserManager
+  class UpdatePgpKey < UserManagerService
+    def initialize(user:)
+      @user = user
+    end
+
+    def call
+      if @user.pgp_pubkey.blank?
+        @user.update! pgp_fpr: nil
+      else
+        result = GPGME::Key.import(@user.pgp_pubkey)
+
+        if result.imports.present?
+          @user.update! pgp_fpr: result.imports.first.fpr
+        else
+          # TODO notify Sentry, user
+          raise "Failed to import OpenPGP pubkey"
+        end
+      end
+
+      LdapManager::UpdatePgpKey.call(dn: @user.dn, pubkey: @user.pgp_pubkey)
+    end
+  end
+end