Fixes #voodoorai2000 comments

Fixes some comments from #voodoorai2000 for the PR to consul

app/controllers/dashboard/successful_supports_controller.rb

@@ -0,0 +1,58 @@
+class Dashboard::SuccessfulSupportsController < Dashboard::BaseController
+  include Dashboard::ExpectsDateRange
+
+  def index
+    authorize! :dashboard, proposal
+    render json: accumulated_grouped_supports
+  end
+
+  private
+
+  def accumulated_grouped_supports
+    grouped_votes = grouped_supports
+    grouped_votes.each do |group, votes|
+      grouped_votes[group] = votes.inject(0) { |sum, vote| sum + vote.vote_weight }
+    end
+
+    accumulated = 0
+    grouped_votes.each do |k, v|
+      accumulated += v
+      grouped_votes[k] = accumulated
+    end
+
+    grouped_votes
+  end
+
+  def grouped_supports
+    if params[:group_by] == 'week'
+      return supports.group_by { |v| "#{v.voted_at.to_date.cweek}/#{v.voted_at.to_date.year}" }
+    end
+
+    if params[:group_by] == 'month'
+      return supports.group_by { |v| "#{v.voted_at.to_date.year}-#{v.voted_at.to_date.month}" }
+    end
+
+    supports.group_by { |v| v.voted_at.to_date }
+  end
+
+  def supports
+    return [] if successful_proposal.nil?
+
+    Vote
+      .select("created_at + interval '#{days_diff} day' voted_at, *")
+      .where(votable: successful_proposal)
+      .where("created_at + interval '#{days_diff} day' between ? and ?", start_date.beginning_of_day, end_date.end_of_day)
+      .order(created_at: :asc)
+  end
+
+  def successful_proposal
+    @successful_proposal ||= Proposal.find_by(id: Setting['proposals.successful_proposal_id'])
+  end
+
+  def days_diff
+    return 0 if successful_proposal.nil?
+    return 0 if proposal.published_at.nil?
+
+    (proposal.published_at.to_date - successful_proposal.published_at.to_date).to_i
+  end
+end