column_table_header compute update_sort_path

app/components/instructeurs/column_table_header_component.rb

@@ -2,11 +2,24 @@
 
 class Instructeurs::ColumnTableHeaderComponent < ApplicationComponent
   def initialize(procedure_presentation:)
-    @procedure_presentation = procedure_presentation
+    @procedure = procedure_presentation.procedure
     @columns = procedure_presentation.displayed_fields_for_headers
     @sorted_column = procedure_presentation.sorted_column
   end
 
+  private
+
+  def update_sort_path(column)
+    column_id = column.id
+    order = opposite_order_for(column)
+
+    update_sort_instructeur_procedure_path(@procedure, column_id:, order:)
+  end
+
+  def opposite_order_for(column)
+    @sorted_column.column == column ? @sorted_column.opposite_order : 'asc'
+  end
+
   def label_and_arrow(column)
     return column.label if @sorted_column.column != column
 

app/components/instructeurs/column_table_header_component/column_table_header_component.html.haml

@@ -1,4 +1,3 @@
 - @columns.each do |column|
   %th{ aria_sort(column), scope: "col", class: column.classname }
-    = link_to update_sort_instructeur_procedure_path(@procedure_presentation.procedure, column_id: column.id, order: @procedure_presentation.opposite_order_for(column.table, column.column)) do
+    = link_to label_and_arrow(column), update_sort_path(column)
-      = label_and_arrow(column)

app/models/sorted_column.rb

@@ -10,6 +10,8 @@ class SortedColumn
 
   def ascending? = @order == 'asc'
 
+  def opposite_order = ascending? ? 'desc' : 'asc'
+
   def ==(other)
     other&.column == column && other.order == order
   end