Add logic for saving selected tenants to @edit and to Catalog Item

app/controllers/catalog_controller.rb

@@ -901,6 +901,10 @@ def atomic_req_submit
       end
     end
 
+    # Save selected Tenants from the tree
+    tenant_objects = Tenant.where(:id => @edit[:new][:tenant_ids])
+    st.additional_tenants = tenant_objects
+
     if st.save
       set_resource_action(st) unless st.kind_of?(ServiceTemplateContainerTemplate)
       flash_key = params[:button] == "save" ? _("Service Catalog Item \"%{name}\" was saved") : _("Service Catalog Item \"%{name}\" was added")
@@ -1254,6 +1258,7 @@ def set_form_vars
     @edit[:new][:catalog_id] = @record.service_template_catalog.try(:id)
     @edit[:new][:st_prov_type] ||= @record.prov_type
     @edit[:new][:generic_subtype] = @record.generic_subtype || "custom" if @edit[:new][:st_prov_type] == 'generic'
+    @edit[:new][:tenant_ids] = @record.additional_tenants
     @tenants_tree = build_tenants_tree # Build the tree with available tenants
     @available_catalogs = available_catalogs.sort # Get available catalogs with tenants and ancestors
     available_orchestration_templates if @record.kind_of?(ServiceTemplateOrchestration)
@@ -1392,13 +1397,23 @@ def get_form_vars
     # saving it in @edit as well, to use it later because prov_set_form_vars resets @edit[:new]
     @edit[:st_prov_type] = @edit[:new][:st_prov_type] = params[:st_prov_type] if params[:st_prov_type]
     @edit[:new][:long_description] = @edit[:new][:long_description].to_s + "..." if params[:transOne]
+    checked_tenants if params[:check] # Save checked Tenants to @edit
 
     @tenants_tree = build_tenants_tree # Build the tree with available tenants
     @available_catalogs = available_catalogs.sort # Get available catalogs with tenants and ancestors
     get_form_vars_orchestration if @edit[:new][:st_prov_type] == 'generic_orchestration'
     fetch_form_vars_ansible_or_ct if %w[generic_ansible_tower generic_container_template].include?(@edit[:new][:st_prov_type])
   end
 
+  def checked_tenants
+    new_id = params[:id].split('-').pop if params[:id].starts_with?('tn')
+    if params[:check] == '1' # Adding/checking Tenant(s) in the tree for the Catalog Item
+      @edit[:new][:tenant_ids] = @edit[:new][:tenant_ids] + [new_id]
+    else # Unchecking selected Tenant(s)
+      @edit[:new][:tenant_ids].delete(new_id)
+    end
+  end
+
   def available_container_managers
     @edit[:new][:available_managers] =
       ManageIQ::Providers::ContainerManager.all.collect { |t| [t.name, t.id] }.sort