Move investments sidebar map view to a component

This way we remove some logic from the (huge) investments controller
class.

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

@@ -0,0 +1,3 @@
+<div class="map">
+  <%= render_map(map_location, investments_coordinates: coordinates) %>
+</div>

app/components/budgets/investments/map_component.rb

@@ -0,0 +1,22 @@
+class Budgets::Investments::MapComponent < ApplicationComponent
+  attr_reader :heading, :investments
+
+  def initialize(investments, heading:)
+    @investments = investments
+    @heading = heading
+  end
+
+  def render?
+    map_location&.available?
+  end
+
+  private
+
+    def map_location
+      MapLocation.from_heading(heading) if heading.present?
+    end
+
+    def coordinates
+      MapLocation.where(investment: investments).map(&:json_data)
+    end
+end

app/controllers/budgets/investments_controller.rb

@@ -20,7 +20,6 @@ module Budgets
 
     before_action :load_ballot, only: [:index, :show]
     before_action :load_heading, only: [:index, :show]
-    before_action :load_map, only: [:index]
     before_action :set_random_seed, only: :index
     before_action :load_categories, only: :index
     before_action :set_default_investment_filter, only: :index
@@ -41,10 +40,9 @@ module Budgets
 
     def index
       @investments = investments.page(params[:page]).per(PER_PAGE).for_render
-
       @investment_ids = @investments.ids
-      @investments_map_coordinates = MapLocation.where(investment: investments).map(&:json_data)
 
+      @investments_in_map = investments
       @tag_cloud = tag_cloud
       @remote_translations = detect_remote_translations(@investments)
     end
@@ -179,9 +177,5 @@ module Budgets
           params[:filter] ||= "selected"
         end
       end
-
-      def load_map
-        @map_location = MapLocation.from_heading(@heading) if @heading.present?
-      end
   end
 end

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

@@ -1,3 +0,0 @@
-<div class="map">
-  <%= render_map(@map_location, investments_coordinates: @investments_map_coordinates) %>
-</div>

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

@@ -22,10 +22,7 @@
 </div>
 
 <%= render Budgets::Investments::ContentBlocksComponent.new(@heading) %>
-
-<% if @map_location&.available? %>
-  <%= render "budgets/investments/map" %>
-<% end %>
+<%= render Budgets::Investments::MapComponent.new(@investments_in_map, heading: @heading) %>
 <%= render "shared/tag_cloud", taggable: "Budget::Investment" %>
 <%= render "budgets/investments/categories" %>
 <%= render Budgets::Investments::FiltersComponent.new %>