Aggiunge heatmaps first-party (click/scroll) con pagina admin Analytics.

Raccoglie eventi aggregati dietro consenso cookie, senza PII né tracking su admin/regia/live/replay; GA4 resta invariato.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/services/analytics/aggregate.rb

@@ -0,0 +1,86 @@
+# frozen_string_literal: true
+
+module Analytics
+  class Aggregate
+    BATCH = 500
+
+    def call
+      loop do
+        ids = AnalyticsEvent.order(:occurred_at).limit(BATCH).pluck(:id)
+        break if ids.empty?
+
+        events = AnalyticsEvent.where(id: ids).to_a
+        apply_clicks(events.select { |e| e.event_type == "click" })
+        apply_stats(events.reject { |e| e.event_type == "click" })
+        AnalyticsEvent.where(id: ids).delete_all
+      end
+    end
+
+    def purge_old!(retention: 30.days)
+      # Raw should already be empty after aggregate; keep as safety net.
+      AnalyticsEvent.where("occurred_at < ?", retention.ago).delete_all
+      AnalyticsPageCell.where("day < ?", retention.ago.to_date).delete_all
+      AnalyticsPageStat.where("day < ?", retention.ago.to_date).delete_all
+    end
+
+    private
+
+    def apply_clicks(events)
+      return if events.empty?
+
+      grid = AnalyticsPageCell::GRID_SIZE
+      grouped = Hash.new(0)
+      events.each do |e|
+        next if e.x_pct.nil? || e.y_pct.nil?
+
+        cell_x = [[(e.x_pct.to_f / 100 * grid).floor, grid - 1].min, 0].max
+        cell_y = [[(e.y_pct.to_f / 100 * grid).floor, grid - 1].min, 0].max
+        key = [e.occurred_at.in_time_zone.to_date, e.page_path, e.device, cell_x, cell_y]
+        grouped[key] += 1
+      end
+
+      now = Time.current
+      grouped.each do |(day, page_path, device, cell_x, cell_y), count|
+        cell = AnalyticsPageCell.find_or_initialize_by(
+          day: day, page_path: page_path, device: device, cell_x: cell_x, cell_y: cell_y
+        )
+        cell.click_count = cell.click_count.to_i + count
+        cell.created_at ||= now
+        cell.updated_at = now
+        cell.save!
+      end
+    end
+
+    def apply_stats(events)
+      return if events.empty?
+
+      grouped = {}
+      events.each do |e|
+        day = e.occurred_at.in_time_zone.to_date
+        key = [day, e.page_path, e.device]
+        bucket = grouped[key] ||= { pageviews: 0, scroll_samples: 0, scroll_sum: 0, max_scroll: 0 }
+        case e.event_type
+        when "pageview"
+          bucket[:pageviews] += 1
+        when "scroll"
+          pct = e.scroll_pct.to_f.round
+          bucket[:scroll_samples] += 1
+          bucket[:scroll_sum] += pct
+          bucket[:max_scroll] = [bucket[:max_scroll], pct].max
+        end
+      end
+
+      now = Time.current
+      grouped.each do |(day, page_path, device), vals|
+        stat = AnalyticsPageStat.find_or_initialize_by(day: day, page_path: page_path, device: device)
+        stat.pageview_count = stat.pageview_count.to_i + vals[:pageviews]
+        stat.scroll_samples = stat.scroll_samples.to_i + vals[:scroll_samples]
+        stat.scroll_sum_pct = stat.scroll_sum_pct.to_i + vals[:scroll_sum]
+        stat.max_scroll_pct = [stat.max_scroll_pct.to_i, vals[:max_scroll]].max
+        stat.created_at ||= now
+        stat.updated_at = now
+        stat.save!
+      end
+    end
+  end
+end