Add title handling to StateBuilder

Author: mpapis

docs/aasm_integration.md

@@ -70,3 +70,26 @@ show do
   end
 end
 ```
+
+## Adding a title
+
+You can add a static text title to the state column:
+
+```ruby
+state_column :state, title: "Changes when ..."
+state_row :state, title: "Changes when ..."
+```
+
+You can use model field as a title:
+
+```ruby
+state_column :state, title: :state_changed_at
+state_row :state, title: :state_changed_at
+```
+
+You can use a proc as a title:
+
+```ruby
+state_column :state, title: ->(model) { model.change_reason && "Reason: #{model.change_reason}" }
+state_row :state, title: ->(model) { model.change_reason && "Reason: #{model.change_reason}" }
+```

lib/activeadmin_addons/addons/state_builder.rb

@@ -11,7 +11,10 @@ class StateBuilder < CustomBuilder
     def render
       raise "you need to install AASM gem first" unless defined? AASM
       raise "the #{attribute} is not an AASM state" unless state_attribute?
-      context.status_tag(model.aasm(machine_name).human_state, class: status_class_for_model)
+
+      context.status_tag(
+        model.aasm(machine_name).human_state, class: status_class_for_model, title: title
+      )
     end
 
     private
@@ -33,6 +36,23 @@ def machine_name
     def class_bindings
       @class_bindings ||= DEFAULT_CLASS_BINDINGS.merge(options[:states] || {})
     end
+
+    def title
+      return @title if defined? @title
+
+      title = options.fetch(:title, nil)
+      @title =
+        case title
+        when String, nil
+          title
+        when Symbol
+          model.send(title)
+        when Proc
+          title.call(model)
+        else
+          raise "Invalid title type: #{title.class}. It must be a String, Symbol or Proc."
+        end
+    end
   end
 end
 

spec/features/state_builder_spec.rb

@@ -71,4 +71,48 @@
       expect(page).to have_css('.stock')
     end
   end
+
+  context "passing title as string" do
+    before do
+      register_show(Invoice) do
+        state_row(:aasm_state, title: 'Enigmatic')
+      end
+
+      visit admin_invoice_path(create_invoice)
+    end
+
+    it "shows title" do
+      expect(page).to have_selector('span[title="Enigmatic"]')
+    end
+  end
+
+  context "passing title as string" do
+    before do
+      register_show(Invoice) do
+        state_row(:aasm_state, title: :shipping_status)
+      end
+
+      visit admin_invoice_path(create_invoice)
+    end
+
+    it "shows title" do
+      expect(page).to have_selector('span[title="stock"]')
+    end
+  end
+
+  context "passing title as proc" do
+    before do
+      register_show(Invoice) do
+        state_row(:aasm_state, title: lambda { |invoice|
+          invoice.shipping_status && "Shipping: #{invoice.shipping_status.humanize}"
+        })
+      end
+
+      visit admin_invoice_path(create_invoice)
+    end
+
+    it "shows title" do
+      expect(page).to have_selector('span[title="Shipping: Stock"]')
+    end
+  end
 end