Add relationship outcomes page

app/controllers/merge_requests_controller.rb

@@ -9,6 +9,7 @@ class MergeRequestsController < ApplicationController
   def helpdesk_ticket; end
   def merge_start_confirmation; end
   def user_outcomes; end
+  def relationship_outcomes; end
 
   def create
     ActiveRecord::Base.transaction do
@@ -63,7 +64,13 @@ class MergeRequestsController < ApplicationController
 
   def start_merge
     if @merge_request.status == "ready_to_merge"
-      @merge_request.update!(processing: true, last_failed_attempt: nil, total_users: @merge_request.total_visible_users_after_merge)
+      @merge_request.update!(
+        processing: true,
+        last_failed_attempt: nil,
+        total_users: @merge_request.total_visible_users_after_merge,
+        total_stock_owners: @merge_request.total_stock_owners_after_merge,
+        total_managing_agents: @merge_request.total_managing_agents_after_merge,
+      )
       ProcessMergeRequestJob.perform_later(merge_request: @merge_request)
     end
 

app/helpers/merge_requests_helper.rb

@@ -27,7 +27,7 @@ module MergeRequestsHelper
       { label: "Total users after merge", value: display_value_or_placeholder(merge_request.total_users_label), action: merge_outcome_action(merge_request, "user_outcomes") },
       { label: "Total schemes after merge", value: display_value_or_placeholder(merge_request.total_schemes), action: { text: "View", href: "#", visually_hidden_text: "total schemes after merge" } },
       { label: "Total logs after merge", value: merge_request.total_lettings_logs.present? || merge_request.total_sales_logs.present? ? "#{merge_request.total_lettings_logs} lettings logs<br>#{merge_request.total_sales_logs} sales logs".html_safe : display_value_or_placeholder(nil), action: { text: "View", href: "#", visually_hidden_text: "total logs after merge" } },
-      { label: "Total stock owners & managing agents after merge", value: merge_request.total_stock_owners.present? || merge_request.total_managing_agents.present? ? "#{merge_request.total_stock_owners} stock owners<br>#{merge_request.total_managing_agents} managing agents".html_safe : display_value_or_placeholder(nil), action: { text: "View", href: "#", visually_hidden_text: "total stock owners & managing agents after merge" } },
+      { label: "Total stock owners & managing agents after merge", value: display_value_or_placeholder(merge_request.total_stock_owners_managing_agents_label), action: merge_outcome_action(merge_request, "relationship_outcomes") },
     ]
   end
 
@@ -107,4 +107,68 @@ module MergeRequestsHelper
     count = merge_request.total_visible_users_after_merge
     "#{"#{count} user".pluralize(count)} after merge"
   end
+
+  def total_stock_owners_after_merge_text(merge_request)
+    count = merge_request.total_stock_owners_after_merge || 0
+    "#{"#{count} stock owner".pluralize(count)} after merge"
+  end
+
+  def total_managing_agents_after_merge_text(merge_request)
+    count = merge_request.total_managing_agents_after_merge || 0
+    "#{"#{count} managing agent".pluralize(count)} after merge"
+  end
+
+  def stock_owners_text(merge_request)
+    relationship_text(merge_request, "stock_owner", :stock_owners_organisation_path)
+  end
+
+  def managing_agent_text(merge_request)
+    relationship_text(merge_request, "managing_agent", :managing_agents_organisation_path)
+  end
+
+  def relationship_text(merge_request, relationship_type, relationship_path_helper)
+    html_content = ""
+    duplicates = duplicate_relationships(merge_request, relationship_type)
+    organisations_without_relationships = ([merge_request.absorbing_organisation] + merge_request.merging_organisations).select { |org| org.send(relationship_type.pluralize).visible.empty? }
+
+    if duplicates.any?
+      html_content += "Some of the organisations merging have common #{relationship_type.humanize(capitalize: false).pluralize}.<br><br>"
+    end
+
+    if organisations_without_relationships.any?
+      org_names = organisations_without_relationships.map(&:name).to_sentence
+      verb = organisations_without_relationships.count > 1 ? "have" : "has"
+      html_content += "#{org_names} #{verb} no #{relationship_type.humanize(capitalize: false).pluralize}.<br><br>"
+    end
+
+    ([merge_request.absorbing_organisation] + merge_request.merging_organisations).each do |org|
+      relationship_count = org.send(relationship_type.pluralize).visible.count
+      next if relationship_count.zero?
+
+      link_text = if relationship_count == 1
+                    "View the #{relationship_count} #{org.name} #{relationship_type.humanize(capitalize: false)} (opens in a new tab)"
+                  else
+                    "View all #{relationship_count} #{org.name} #{relationship_type.humanize(capitalize: false).pluralize} (opens in a new tab)"
+                  end
+      html_content += "#{govuk_link_to(link_text, send(relationship_path_helper, org), target: '_blank')}<br><br>"
+    end
+
+    html_content.html_safe
+  end
+
+  def duplicate_relationships(merge_request, relationship_type)
+    relationships = merge_request.absorbing_organisation.send(relationship_type.pluralize) + merge_request.merging_organisations.flat_map { |org| org.send(relationship_type.pluralize) }
+    seen = Set.new
+    duplicates = []
+
+    relationships.each do |relationship|
+      if seen.include?(relationship)
+        duplicates << relationship
+      else
+        seen.add(relationship)
+      end
+    end
+
+    duplicates
+  end
 end

app/models/merge_request.rb

@@ -61,8 +61,29 @@ class MergeRequest < ApplicationRecord
     absorbing_organisation.users.visible.count + merging_organisations.sum { |org| org.users.visible.count }
   end
 
+  def total_stock_owners_after_merge
+    return total_stock_owners if status == STATUS[:request_merged] || status == STATUS[:processing]
+
+    stock_owners = absorbing_organisation.stock_owners.visible + merging_organisations.flat_map { |org| org.stock_owners.visible }
+    stock_owners.uniq.count
+  end
+
+  def total_managing_agents_after_merge
+    return total_managing_agents if status == STATUS[:request_merged] || status == STATUS[:processing]
+
+    managing_agents = absorbing_organisation.managing_agents.visible + merging_organisations.flat_map { |org| org.managing_agents.visible }
+    managing_agents.uniq.count
+  end
+
   def total_users_label
-    "#{total_visible_users_after_merge} #{'User'.pluralize(total_visible_users_after_merge)}"
+    "#{total_visible_users_after_merge} #{'user'.pluralize(total_visible_users_after_merge)}"
+  end
+
+  def total_stock_owners_managing_agents_label
+    stock_owners_count = total_stock_owners_after_merge
+    managing_agents_count = total_managing_agents_after_merge
+
+    "#{stock_owners_count} #{'stock owner'.pluralize(stock_owners_count)}\n#{managing_agents_count} #{'managing agent'.pluralize(managing_agents_count)}"
   end
 
   def organisations_with_users

app/views/merge_requests/relationship_outcomes.html.erb

@@ -0,0 +1,26 @@
+<% content_for :before_content do %>
+  <% title = "Stock owners & managing agents" %>
+  <% content_for :title, title %>
+  <%= govuk_back_link href: merge_request_path(@merge_request) %>
+<% end %>
+
+<h1 class="govuk-heading-l">
+  <span class="govuk-caption-l"><%= @merge_request.absorbing_organisation_name %></span>
+  Stock owners & managing agents
+</h1>
+
+<% unless @merge_request.status == "request_merged" || @merge_request.status == "processing" %>
+  <h2 class="govuk-heading-m"><%= total_stock_owners_after_merge_text(@merge_request) %></h2>
+  <p class="govuk-body">
+    <%= stock_owners_text(@merge_request) %>
+  </p>
+  <hr class="govuk-section-break govuk-section-break--m govuk-section-break--visible govuk-!-width-one-half">
+  <br>
+  <h2 class="govuk-heading-m"><%= total_managing_agents_after_merge_text(@merge_request) %></h2>
+  <p class="govuk-body">
+    <%= managing_agent_text(@merge_request) %>
+  </p>
+<% end %>
+
+
+

config/routes.rb

@@ -211,6 +211,7 @@ Rails.application.routes.draw do
       get "helpdesk-ticket"
       get "merge-start-confirmation"
       get "user-outcomes"
+      get "relationship-outcomes"
       get "delete-confirmation", to: "merge_requests#delete_confirmation"
       delete "delete", to: "merge_requests#delete"
       patch "start-merge", to: "merge_requests#start_merge"