convert check-uk-visa study and work flow blocks to lambdas

- working around the edges of ruby method structures

app/flows/check_uk_visa_flow.rb

@@ -143,7 +143,7 @@ def define
       next_node do
         if calculator.passing_through_uk_border_control? && calculator.passport_country_is_taiwan?
           outcome :outcome_transit_taiwan_through_border_control
-        elsif calculator.passing_through_uk_border_control? && requires_a_visitor_in_transit_visa?
+        elsif calculator.passing_through_uk_border_control? && calculator.requires_a_visitor_in_transit_visa?
           outcome :outcome_transit_leaving_airport
         elsif calculator.passing_through_uk_border_control? && calculator.requires_a_direct_airside_transit_visa?
           outcome :outcome_transit_leaving_airport_direct_airside_transit_visa
@@ -171,10 +171,14 @@ def define
       end
 
       next_node do
-        if calculator.study_visit?
-          flow.outcome_study_visit
+        if calculator.work_visit? && calculator.staying_for_over_six_months?
+          question :what_type_of_work?
         elsif calculator.work_visit?
-          flow.next_node_for_work_visit
+          work_outcome = flow.work_visit_outcome_lambda.call calculator
+          outcome work_outcome unless work_outcome == nil
+        elsif calculator.study_visit?
+          study_outcome = flow.study_visit_lambda.call calculator
+          outcome study_outcome unless study_outcome == nil
         end
       end
     end
@@ -355,36 +359,43 @@ def travel_response_next_route(node)
     end
   end
 
-private
-
-
-  def next_node_for_work_visit
-    if calculator.staying_for_over_six_months?
-      question :what_type_of_work?
-    elsif calculator.staying_for_six_months_or_less? && calculator.has_passport_requiring_electronic_visa_waiver_list?
-      outcome :outcome_work_waiver
-    elsif calculator.staying_for_six_months_or_less? && calculator.short_work_visits_are_approved?
-      # outcome 5.5 work N no visa needed
-      outcome :outcome_work_n
-    elsif calculator.staying_for_six_months_or_less?
-      # outcome 5 work m visa needed short courses
-      outcome :outcome_work_m
-    end
+  def study_visit_lambda
+    lambda { |calculator|
+      if calculator.staying_for_over_six_months?
+        outcome = :outcome_study_y # outcome 2 study y
+      elsif calculator.staying_for_six_months_or_less? && calculator.has_passport_requiring_electronic_visa_waiver_list?
+        outcome = :outcome_study_waiver
+      elsif calculator.staying_for_six_months_or_less? && calculator.passport_country_is_taiwan?
+        outcome = :outcome_study_waiver_taiwan
+      elsif calculator.staying_for_six_months_or_less? && (calculator.requires_a_direct_airside_transit_visa? ||
+        calculator.passport_country_in_visa_national_list? ||
+        calculator.travel_document?)
+        outcome = :outcome_study_m # outcome 3 study m visa needed short courses
+      elsif calculator.staying_for_six_months_or_less? && (calculator.passport_country_in_british_overseas_territories_list? || calculator.passport_country_in_non_visa_national_list? || calculator.passport_country_in_eea?)
+        outcome = :outcome_study_no_visa_needed # outcome 1 no visa needed
+      else
+        outcome = nil
+      end
+      return outcome
+    }
   end
 
-  def outcome_study_visit
-    if calculator.staying_for_over_six_months?
-      outcome :outcome_study_y # outcome 2 study y
-    elsif calculator.staying_for_six_months_or_less? && calculator.has_passport_requiring_electronic_visa_waiver_list?
-      outcome :outcome_study_waiver
-    elsif calculator.staying_for_six_months_or_less? && calculator.passport_country_is_taiwan?
-      outcome :outcome_study_waiver_taiwan
-    elsif calculator.staying_for_six_months_or_less? && (calculator.requires_a_direct_airside_transit_visa? ||
-      calculator.passport_country_in_visa_national_list? ||
-      calculator.travel_document?)
-      outcome :outcome_study_m # outcome 3 study m visa needed short courses
-    elsif calculator.staying_for_six_months_or_less? && (calculator.passport_country_in_british_overseas_territories_list? || calculator.passport_country_in_non_visa_national_list? || calculator.passport_country_in_eea?)
-      outcome :outcome_study_no_visa_needed # outcome 1 no visa needed
-    end
+  def work_visit_outcome_lambda
+    lambda { |calculator|
+      if calculator.staying_for_six_months_or_less? &&
+        calculator.has_passport_requiring_electronic_visa_waiver_list?
+        outcome = :outcome_work_waiver
+      elsif calculator.staying_for_six_months_or_less? &&
+        calculator.short_work_visits_are_approved?
+        # outcome 5.5 work N no visa needed
+        outcome = :outcome_work_n
+      elsif calculator.staying_for_six_months_or_less?
+        # outcome 5 work m visa needed short courses
+        outcome = :outcome_work_m
+      else
+        outcome = nil
+      end
+      return outcome
+    }
   end
 end