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/ingest.rb

@@ -0,0 +1,118 @@
+# frozen_string_literal: true
+
+module Analytics
+  class Ingest
+    MAX_BATCH = 50
+    RATE_LIMIT_PER_MINUTE = 60
+
+    Result = Struct.new(:accepted, :rejected, :rate_limited, keyword_init: true)
+
+    def initialize(events:, remote_ip:)
+      @events = Array(events)
+      @remote_ip = remote_ip.to_s.presence || "unknown"
+    end
+
+    def call
+      return Result.new(accepted: 0, rejected: 0, rate_limited: true) if rate_limited?
+
+      slice = @events.first(MAX_BATCH)
+      accepted = 0
+      rejected = 0
+      rows = []
+
+      slice.each do |raw|
+        attrs = build_attrs(raw)
+        if attrs
+          rows << attrs
+          accepted += 1
+        else
+          rejected += 1
+        end
+      end
+
+      AnalyticsEvent.insert_all(rows) if rows.any?
+      Analytics::Aggregate.new.call if rows.any?
+
+      Result.new(accepted: accepted, rejected: rejected + (@events.size - slice.size), rate_limited: false)
+    end
+
+    private
+
+    def rate_limited?
+      key = "analytics:ingest:#{@remote_ip}"
+      redis = Redis.new(url: ENV.fetch("REDIS_URL", "redis://localhost:6379/0"))
+      count = redis.incr(key)
+      redis.expire(key, 60) if count == 1
+      count > RATE_LIMIT_PER_MINUTE
+    rescue StandardError => e
+      Rails.logger.warn("[analytics] rate limit unavailable: #{e.class}")
+      false
+    end
+
+    def build_attrs(raw)
+      data = raw.is_a?(Hash) ? raw.with_indifferent_access : {}
+      event_type = data[:type].to_s.presence || data[:event_type].to_s
+      return nil unless AnalyticsEvent::EVENT_TYPES.include?(event_type)
+
+      device = data[:device].to_s
+      return nil unless AnalyticsEvent::DEVICES.include?(device)
+
+      page_path = PathNormalizer.normalize(data[:path] || data[:page_path])
+      return nil if PathNormalizer.excluded?(page_path)
+      return nil if page_path.length > 200
+
+      occurred_at = parse_time(data[:ts] || data[:occurred_at]) || Time.current
+      attrs = {
+        page_path: page_path,
+        device: device,
+        event_type: event_type,
+        occurred_at: occurred_at,
+        x_pct: nil,
+        y_pct: nil,
+        scroll_pct: nil,
+        created_at: Time.current,
+        updated_at: Time.current
+      }
+
+      case event_type
+      when "click"
+        x = clamp_pct(data[:x] || data[:x_pct])
+        y = clamp_pct(data[:y] || data[:y_pct])
+        return nil if x.nil? || y.nil?
+
+        attrs[:x_pct] = x
+        attrs[:y_pct] = y
+      when "scroll"
+        scroll = clamp_pct(data[:scroll] || data[:scroll_pct])
+        return nil if scroll.nil?
+
+        attrs[:scroll_pct] = scroll
+      when "pageview"
+        # no extra fields
+      end
+
+      attrs
+    end
+
+    def clamp_pct(value)
+      return nil if value.nil?
+
+      n = Float(value)
+      return nil if n.nan? || n.infinite?
+      return nil if n.negative? || n > 100
+
+      n.round(2)
+    rescue ArgumentError, TypeError
+      nil
+    end
+
+    def parse_time(value)
+      return value if value.is_a?(Time) || value.is_a?(ActiveSupport::TimeWithZone)
+      return Time.zone.at(value.to_i / 1000.0) if value.is_a?(Numeric) || value.to_s.match?(/\A\d{10,13}\z/)
+
+      Time.zone.parse(value.to_s)
+    rescue ArgumentError, TypeError
+      nil
+    end
+  end
+end