Move stats graph partial to a component

Note we're naming it "chart" in order to avoid possible conflicts with
the "graph" view when we move it to a component.

app/components/admin/stats/budget_supporting_component.html.erb

@@ -30,7 +30,7 @@
   </div>
 </div>
 
-<%= render "admin/stats/graph", name: "user_supported_budgets", event: "", count: user_count %>
+<%= render Admin::Stats::ChartComponent.new(name: "user_supported_budgets", event: "", count: user_count) %>
 
 <table class="investment-projects-summary user-count-by-heading">
   <thead>

app/components/admin/stats/chart_component.rb

@@ -0,0 +1,27 @@
+class Admin::Stats::ChartComponent < ApplicationComponent
+  attr_reader :name, :event, :count
+
+  def initialize(name:, event:, count:)
+    @name = name
+    @event = event
+    @count = count
+  end
+
+  private
+
+    def chart_tag(opt = {})
+      opt[:data] ||= {}
+      opt[:data][:graph] = admin_api_stats_path(chart_data(opt))
+      tag.div(**opt)
+    end
+
+    def chart_data(opt = {})
+      data = nil
+      if opt[:id].present?
+        data = { opt[:id] => true }
+      elsif opt[:event].present?
+        data = { event: opt[:event] }
+      end
+      data
+    end
+end

app/helpers/stats_helper.rb

@@ -1,20 +1,4 @@
 module StatsHelper
-  def chart_tag(opt = {})
-    opt[:data] ||= {}
-    opt[:data][:graph] = admin_api_stats_path(chart_data(opt))
-    tag.div(**opt)
-  end
-
-  def chart_data(opt = {})
-    data = nil
-    if opt[:id].present?
-      data = { opt[:id] => true }
-    elsif opt[:event].present?
-      data = { event: opt[:event] }
-    end
-    data
-  end
-
   def budget_investments_chart_tag(opt = {})
     opt[:data] ||= {}
     opt[:data][:graph] = admin_api_stats_path(budget_investments: true)

app/views/admin/stats/graph.html.erb

@@ -4,4 +4,4 @@
 
 <%= back_link_to admin_stats_path %>
 
-<%= render "graph", name: @name, event: @event, count: @count %>
+<%= render Admin::Stats::ChartComponent.new(name: @name, event: @event, count: @count) %>