Extract calculate winners button to a component

This way we remove some duplication.

app/components/admin/budgets/calculate_winners_button_component.html.erb

@@ -0,0 +1,13 @@
+<% if display_button? %>
+  <%= link_to text,
+              calculate_winners_admin_budget_path(budget),
+              method: :put,
+              class: html_class %>
+<% elsif from_investments %>
+  <span class="button hollow disabled float-right clear">
+    <%= t("admin.budgets.winners.calculate") %>
+  </span>
+  <div class="callout warning clear">
+    <%= t("admin.budget_investments.index.cannot_calculate_winners") %>
+  </div>
+<% end %>

app/components/admin/budgets/calculate_winners_button_component.rb

@@ -0,0 +1,30 @@
+class Admin::Budgets::CalculateWinnersButtonComponent < ApplicationComponent
+  attr_reader :budget, :from_investments
+
+  def initialize(budget, from_investments: false)
+    @budget = budget
+    @from_investments = from_investments
+  end
+
+  private
+
+    def display_button?
+      budget.balloting_or_later?
+    end
+
+    def text
+      if budget.investments.winners.empty?
+        t("admin.budgets.winners.calculate")
+      else
+        t("admin.budgets.winners.recalculate")
+      end
+    end
+
+    def html_class
+      if from_investments
+        "button hollow float-right clear"
+      else
+        "button hollow"
+      end
+    end
+end

app/components/admin/budgets/form_component.html.erb

@@ -86,12 +86,7 @@
     </div>
 
     <div class="float-right">
-      <% if display_calculate_winners_button?(budget) %>
+      <%= render Admin::Budgets::CalculateWinnersButtonComponent.new(budget) %>
-        <%= link_to calculate_winner_button_text(budget),
-                    calculate_winners_admin_budget_path(budget),
-                    method: :put,
-                    class: "button hollow" %>
-      <% end %>
 
       <% if budget.has_winning_investments? %>
         <%= link_to t("budgets.show.see_results"),

app/components/admin/budgets/form_component.rb

@@ -5,10 +5,6 @@ class Admin::Budgets::FormComponent < ApplicationComponent
 
   attr_reader :budget, :wizard
   alias_method :wizard?, :wizard
-  delegate :display_calculate_winners_button?,
-           :calculate_winner_button_text,
-           :calculate_winners_admin_budget_path,
-           to: :helpers
 
   def initialize(budget, wizard: false)
     @budget = budget

app/helpers/budgets_helper.rb

@@ -33,18 +33,6 @@ module BudgetsHelper
     budget.published? || current_user&.administrator?
   end
 
-  def display_calculate_winners_button?(budget)
-    budget.balloting_or_later?
-  end
-
-  def calculate_winner_button_text(budget)
-    if budget.investments.winners.empty?
-      t("admin.budgets.winners.calculate")
-    else
-      t("admin.budgets.winners.recalculate")
-    end
-  end
-
   def budget_subnav_items_for(budget)
     {
       results:    t("budgets.results.link"),

app/views/admin/budget_investments/_investments.html.erb

@@ -3,19 +3,7 @@
             class: "float-right small clear" %>
 
 <% if params[:advanced_filters].include?("winners") %>
-  <% if display_calculate_winners_button?(@budget) %>
+  <%= render Admin::Budgets::CalculateWinnersButtonComponent.new(@budget, from_investments: true) %>
-    <%= link_to calculate_winner_button_text(@budget),
-                calculate_winners_admin_budget_path(@budget),
-                method: :put,
-                class: "button hollow float-right clear" %>
-  <% else %>
-    <span class="button hollow disabled float-right clear">
-      <%= t("admin.budgets.winners.calculate") %>
-    </span>
-    <div class="callout warning clear">
-      <%= t("admin.budget_investments.index.cannot_calculate_winners") %>
-    </div>
-  <% end %>
 <% end %>
 
 <% if @investments.any? %>