Extract component to render my ballot

This is the only part of the sidebar that needs to be re-rendered after
an AJAX request adding or removing investments to a ballot, so having a
separate view just for it will make it easier to simplify the code.

app/components/budgets/investments/my_ballot_component.html.erb

@@ -0,0 +1,44 @@
+<div class="my-ballot">
+  <h2 class="sidebar-title">
+    <%= t("budgets.investments.index.sidebar.my_ballot") %>
+  </h2>
+
+  <% if ballot.investments.by_heading(heading.id).count > 0 %>
+    <p>
+      <em><%= sanitize(ballot.voted_info(heading)) %></em>
+    </p>
+  <% elsif assigned_heading.present? %>
+    <p>
+      <%= sanitize(t("budgets.investments.index.sidebar.different_heading_assigned",
+              heading_link: heading_link(assigned_heading, budget)
+            )) %>
+      <br>
+      <small>
+        <%= sanitize(t("budgets.investments.index.sidebar.change_ballot",
+            check_ballot: link_to(t("budgets.investments.index.sidebar.check_ballot_link"),
+                          budget_ballot_path(budget)))) %>
+      </small>
+    </p>
+  <% else %>
+    <p><strong><%= t("budgets.investments.index.sidebar.zero") %></strong></p>
+  <% end %>
+
+  <p>
+    <%= sanitize(ballot.change_vote_info(
+        link: link_to(t("budgets.investments.index.sidebar.change_vote_link"),
+            budget_ballot_path(budget)))) %>
+  </p>
+
+  <ul class="ballot-list">
+    <% if heading %>
+      <%= render Budgets::Ballot::InvestmentForSidebarComponent.with_collection(
+        ballot.investments.by_heading(heading.id),
+        investment_ids: investment_ids
+      ) %>
+    <% end %>
+  </ul>
+
+  <%= link_to t("budgets.investments.header.check_ballot"),
+                budget_ballot_path(budget),
+                class: "button hollow expanded" %>
+</div>

app/components/budgets/investments/my_ballot_component.rb

@@ -0,0 +1,17 @@
+class Budgets::Investments::MyBallotComponent < ApplicationComponent
+  attr_reader :ballot, :heading, :investment_ids, :assigned_heading
+  delegate :heading_link, to: :helpers
+
+  def initialize(ballot:, heading:, investment_ids:, assigned_heading:)
+    @ballot = ballot
+    @heading = heading
+    @investment_ids = investment_ids
+    @assigned_heading = assigned_heading
+  end
+
+  private
+
+    def budget
+      ballot.budget
+    end
+end

app/views/budgets/investments/_sidebar.html.erb

@@ -13,50 +13,12 @@
 <% end %>
 
 <% if @heading && can?(:show, @ballot) %>
-  <div class="my-ballot">
+  <%= render Budgets::Investments::MyBallotComponent.new(
-    <h2 class="sidebar-title">
+    ballot: @ballot,
-      <%= t("budgets.investments.index.sidebar.my_ballot") %>
+    heading: @heading,
-    </h2>
+    investment_ids: @investment_ids,
-
+    assigned_heading: @assigned_heading
-    <% if @ballot.investments.by_heading(@heading.id).count > 0 %>
+  ) %>
-      <p>
-        <em><%= sanitize(@ballot.voted_info(@heading)) %></em>
-      </p>
-    <% elsif @assigned_heading.present? %>
-      <p>
-        <%= sanitize(t("budgets.investments.index.sidebar.different_heading_assigned",
-                heading_link: heading_link(@assigned_heading, @budget)
-              )) %>
-        <br>
-        <small>
-          <%= sanitize(t("budgets.investments.index.sidebar.change_ballot",
-              check_ballot: link_to(t("budgets.investments.index.sidebar.check_ballot_link"),
-                            budget_ballot_path(@budget)))) %>
-        </small>
-      </p>
-    <% else %>
-      <p><strong><%= t("budgets.investments.index.sidebar.zero") %></strong></p>
-    <% end %>
-
-    <p>
-      <%= sanitize(@ballot.change_vote_info(
-          link: link_to(t("budgets.investments.index.sidebar.change_vote_link"),
-              budget_ballot_path(@budget)))) %>
-    </p>
-
-    <ul class="ballot-list">
-      <% if @heading %>
-        <%= render Budgets::Ballot::InvestmentForSidebarComponent.with_collection(
-          @ballot.investments.by_heading(@heading.id),
-          investment_ids: @investment_ids
-        ) %>
-      <% end %>
-    </ul>
-
-    <%= link_to t("budgets.investments.header.check_ballot"),
-                  budget_ballot_path(@budget),
-                  class: "button hollow expanded" %>
-  </div>
 <% end %>
 
 <%= render Budgets::Investments::ContentBlocksComponent.new(@heading) %>