Alternative new Measurement form, WIP

app/controllers/readouts_controller.rb

@@ -0,0 +1,43 @@
+class ReadoutsController < ApplicationController
+  before_action :find_quantity, only: [:new, :discard]
+  before_action :find_prev_quantities, only: [:new, :discard]
+
+  def new
+    new_quantities =
+      case params[:scope]
+      when 'children'
+        @quantity.subquantities
+      when 'subtree'
+        @quantity.progenies
+      else
+        [@quantity]
+      end
+    new_quantities -= @prev_quantities
+    @readouts = current_user.readouts.build(new_quantities.map { |q| {quantity: q} })
+
+    @user_quantities = current_user.quantities.ordered
+    @user_units = current_user.units.ordered
+
+    @quantities = @prev_quantities + new_quantities
+#    @common_ancestor = current_user.quantities
+#      .common_ancestors(all_quantities.map(&:parent_id)).first
+  end
+
+  def discard
+    @prev_quantities -= [@quantity]
+
+    @common_ancestor = current_user.quantities
+      .common_ancestors(@prev_quantities.map(&:parent_id)).first
+  end
+
+  private
+
+  def find_quantity
+    @quantity = current_user.quantities.find_by!(id: params[:id])
+  end
+
+  def find_prev_quantities
+    prev_quantity_ids = params[:readouts]&.map { |r| r[:quantity_id] } || []
+    @prev_quantities = current_user.quantities.find(prev_quantity_ids)
+  end
+end