Add BOMs before CSV info

app/controllers/case_logs_controller.rb

@@ -13,6 +13,7 @@ class CaseLogsController < ApplicationController
 
     all_logs = current_user.case_logs
     unpaginated_filtered_logs = filtered_case_logs(filtered_collection(all_logs, search_term))
+    byte_order_mark = "\uFEFF"
 
     respond_to do |format|
       format.html do
@@ -22,7 +23,7 @@ class CaseLogsController < ApplicationController
       end
 
       format.csv do
-        send_data unpaginated_filtered_logs.to_csv, filename: "logs-#{Time.zone.now}.csv"
+        send_data byte_order_mark + unpaginated_filtered_logs.to_csv, filename: "logs-#{Time.zone.now}.csv"
       end
     end
   end

app/controllers/organisations_controller.rb

@@ -31,6 +31,7 @@ class OrganisationsController < ApplicationController
   def users
     organisation_users = @organisation.users.sorted_by_organisation_and_role
     unpaginated_filtered_users = filtered_collection(organisation_users, search_term)
+    byte_order_mark = "\uFEFF"
 
     respond_to do |format|
       format.html do
@@ -45,7 +46,7 @@ class OrganisationsController < ApplicationController
         end
       end
       format.csv do
-        send_data unpaginated_filtered_users.to_csv, filename: "users-#{@organisation.name}-#{Time.zone.now}.csv"
+        send_data byte_order_mark + unpaginated_filtered_users.to_csv, filename: "users-#{@organisation.name}-#{Time.zone.now}.csv"
       end
     end
   end
@@ -93,6 +94,7 @@ class OrganisationsController < ApplicationController
 
       organisation_logs = CaseLog.all.where(owning_organisation_id: @organisation.id)
       unpaginated_filtered_logs = filtered_case_logs(filtered_collection(organisation_logs, search_term))
+      byte_order_mark = "\uFEFF"
 
       respond_to do |format|
         format.html do
@@ -103,7 +105,7 @@ class OrganisationsController < ApplicationController
         end
 
         format.csv do
-          send_data unpaginated_filtered_logs.to_csv, filename: "logs-#{@organisation.name}-#{Time.zone.now}.csv"
+          send_data byte_order_mark + unpaginated_filtered_logs.to_csv, filename: "logs-#{@organisation.name}-#{Time.zone.now}.csv"
         end
       end
     else

app/controllers/users_controller.rb

@@ -12,6 +12,8 @@ class UsersController < ApplicationController
 
     all_users = User.sorted_by_organisation_and_role
     filtered_users = filtered_users(all_users, search_term)
+    byte_order_mark = "\uFEFF"
+
     @pagy, @users = pagy(filtered_users)
     @searched = search_term.presence
     @total_count = all_users.size
@@ -20,7 +22,7 @@ class UsersController < ApplicationController
       format.html
       format.csv do
         if current_user.support?
-          send_data filtered_users.to_csv, filename: "users-#{Time.zone.now}.csv"
+          send_data byte_order_mark + filtered_users.to_csv, filename: "users-#{Time.zone.now}.csv"
         else
           head :unauthorized
         end