Add Quantity #new, #create, #destroy actions

app/views/quantities/_form.html.erb

@@ -0,0 +1,19 @@
+<%= tabular_fields_for @quantity, form: form_tag do |form| %>
+  <%- tag.tr id: row, class: "form", onkeydown: "processKey(event)",
+    data: {link: link, form: form_tag, hidden_row: hidden_row} do %>
+
+    <td class="<%= class_names({subquantity: @quantity.parent}) %>">
+      <%= form.text_field :name, required: true, autofocus: true, size: 20 %>
+    </td>
+    <td>
+      <%= form.text_area :description, cols: 30, rows: 1, escape: false %>
+    </td>
+
+    <td class="actions">
+      <%= form.button %>
+      <%= image_link_to t(:cancel), "close-outline", quantities_path, class: 'dangerous',
+        name: :cancel, onclick: render_turbo_stream('form_close', {row: row}) %>
+    </td>
+    <td></td>
+  <% end %>
+<% end %>

app/views/quantities/_form_close.html.erb

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+<%= turbo_stream.close_form row %>
+<%= turbo_stream.update :flashes %>

app/views/quantities/_quantity.html.erb

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+<%= tag.tr id: dom_id(quantity),
+           ondragstart: 'dragStart(event)', ondragend: 'dragEnd(event)',
+           ondragover: 'dragOver(event)', ondrop: 'drop(event)',
+           ondragenter: 'dragEnter(event)', ondragleave: 'dragLeave(event)',
+           data: {drag_path: rebase_quantity_path(quantity),
+                  drop_id: dom_id(quantity.parent || quantity)} do %>
+
+  <td class="link" style="--depth:<%= quantity.depth %>">
+    <%= link_to quantity, edit_quantity_path(quantity), onclick: 'this.blur();',
+      data: {turbo_stream: true} %>
+  </td>
+  <td><%= quantity.description %></td>
+
+  <% if current_user.at_least(:active) %>
+    <td class="actions">
+      <%= image_link_to t('.new_subquantity'), 'plus-outline', new_quantity_path(quantity),
+        id: dom_id(quantity, :new, :link), onclick: 'this.blur();', data: {turbo_stream: true} %>
+
+      <%= image_button_to_if quantity.movable?, t('.destroy'), 'delete-outline',
+        quantity_path(quantity), method: :delete %>
+    </td>
+    <% if quantity.movable? %>
+      <td class="handle" draggable="true">&#x283F</td>
+    <% else %>
+      <td></td>
+    <% end %>
+  <% end %>
+<% end %>

app/views/quantities/create.turbo_stream.erb

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+<%= turbo_stream.close_form dom_id(@quantity.parent || Quantity, :new) %>
+<%= turbo_stream.remove :no_items %>
+<% @ancestors.map do |ancestor| %>
+  <%= turbo_stream.replace ancestor %>
+<% end %>
+<%= @before.nil? ? turbo_stream.append(:quantities, @quantity) :
+  turbo_stream.before(@before, @quantity) %>

app/views/quantities/destroy.turbo_stream.erb

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+<% @ancestors.map do |ancestor| %>
+  <%= turbo_stream.replace ancestor %>
+<% end %>
+<%= turbo_stream.remove @quantity %>
+<%= turbo_stream.append(:quantities, render_no_items) if current_user.quantities.empty? %>

app/views/quantities/new.turbo_stream.erb

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+<% dom_obj = @quantity.parent || @quantity %>
+<% ids = {row: dom_id(dom_obj, :new),
+          hidden_row: nil,
+          link: dom_id(dom_obj, :new, :link),
+          form_tag: dom_id(dom_obj, :new, :form)} %>
+
+<%= turbo_stream.disable ids[:link] -%>
+
+<%= turbo_stream.append :quantity_form do %>
+  <%- tabular_form_with model: @quantity, html: {id: ids[:form_tag]} do |form| %>
+    <%= form.hidden_field :parent_id unless @quantity.parent.nil? %>
+  <% end %>
+<% end %>
+
+<% if @quantity.parent %>
+  <%= turbo_stream.remove ids[:row] %>
+  <%= turbo_stream.after @quantity.parent, partial: 'form', locals: ids %>
+<% else %>
+  <%= turbo_stream.prepend :quantities, partial: 'form', locals: ids %>
+<% end %>