[api] Reduce complexity of get_latest_updated

This moves the two queries into seperate methods.

src/api/lib/statistics_calculations.rb

@@ -1,19 +1,30 @@
 class StatisticsCalculations
   def self.get_latest_updated(limit = 10, timelimit = Time.at(0), prj_filter = ".*", pkg_filter = ".*")
-    packages = Package.includes(:project).where(updated_at: timelimit..Time.now).
-               where('packages.name REGEXP ? AND projects.name REGEXP ?', pkg_filter, prj_filter).
-               references(:project).order("updated_at DESC").limit(limit).
-               pluck(:name, "projects.name as project", :updated_at).
-               map { |name, project, at| [at, :package, name, project] }
+    list = packages(limit, timelimit, prj_filter, pkg_filter) + projects(limit, timelimit, prj_filter)
 
-    projects = Project.where(updated_at: timelimit..Time.now).
-               where('name REGEXP ?', prj_filter).
-               order("updated_at DESC").limit(limit).
-               pluck(:name, :updated_at).
-               map { |name, at| [at, name, :project] }
-
-    list = (packages + projects).sort { |a, b| b[0] <=> a[0] }
+    list.sort! { |a, b| b[0] <=> a[0] }
 
     limit ? list.first(limit) : list
   end
+
+  def self.packages(limit, timelimit, prj_filter, pkg_filter)
+    Package.includes(:project).where(updated_at: timelimit..Time.now).
+      where('packages.name REGEXP ? AND projects.name REGEXP ?', pkg_filter, prj_filter).
+      references(:project).
+      order("updated_at DESC").
+      limit(limit).
+      pluck(:name, "projects.name as project", :updated_at).
+      map { |name, project, at| [at, :package, name, project] }
+  end
+  private_class_method :packages
+
+  def self.projects(limit, timelimit, prj_filter)
+    Project.where(updated_at: timelimit..Time.now).
+      where('name REGEXP ?', prj_filter).
+      order("updated_at DESC").
+      limit(limit).
+      pluck(:name, :updated_at).
+      map { |name, at| [at, name, :project] }
+  end
+  private_class_method :projects
 end