show caching information for async dashboard block

app/helpers/dashboards_helper.rb

@@ -223,6 +223,9 @@ module DashboardsHelper
                                   class: 'icon-only icon-settings',
                                   title: l(:label_options))
       end
+      if block_definition.key? :async
+        icons << tag.span('', class: 'icon-only icon-warning', title: dashboard_block_sync_info(block_definition))
+      end
       icons << tag.span('', class: 'icon-only icon-sort-handle sort-handle', title: l(:button_move))
       icons << delete_link(_remove_block_dashboard_path(@project, dashboard, block: block),
                            method: :post,
@@ -430,6 +433,11 @@ module DashboardsHelper
 
   private
 
+  def dashboard_block_sync_info(block_definition)
+    sec = block_definition[:async][:cache_expires_in].presence || DashboardContent::RENDER_ASYNC_CACHE_EXPIRES_IN
+    l :dashboard_block_info_async, seconds: sec
+  end
+
   # Renders a single block content
   def render_dashboard_block_content(block, block_definition, dashboard, **overwritten_settings)
     settings = dashboard.layout_settings block

app/models/dashboard_content.rb

@@ -118,6 +118,28 @@ class DashboardContent
 
   private
 
+  def issues_cache_expires_in
+    issue_count = Rails.cache.fetch project.issues.visible.count, expires_in: 1.hour do
+      if project
+        project.issues.visible.count
+      else
+        Issue.visible.count
+      end
+    end
+
+    if issue_count > 10_000
+      86_400 # 1 day
+    elsif issue_count > 1_000
+      3_600 # 1 hour
+    else
+      60
+    end
+  end
+
+  def issues_cache_key
+    Digest::SHA256.hexdigest [project&.id, User.current.id].compact.join('-')
+  end
+
   # if more the one permission is specified, all permissions are required
   def block_permission_allowed?(permission)
     Array(permission).all? { |p| user.allowed_to?(p, project, global: true) }

config/locales/cs.yml

@@ -197,3 +197,4 @@ cs:
   label_all_projects: "Všechny projekty"
   notice_failed_to_save_entries: "%{count} z %{total} vybrané %{name_plural} nelze uložit: %{ids}."
   field_notes_count: "Počet komentářů"
+  dashboard_block_info_async: This block is loaded asynchronous and cached for %{seconds} seconds.

config/locales/de.yml

@@ -197,3 +197,4 @@ de:
   label_all_projects: Alle Projekte
   notice_failed_to_save_entries: "%{count} von %{total} ausgewählten %{name_plural} konnte(n) nicht gespeichert werden: %{ids}."
   field_notes_count: Anzahl Kommentare
+  dashboard_block_info_async: Dieser Block wird asynchron geladen und %{seconds} Sekunden gecached.

config/locales/en.yml

@@ -197,3 +197,4 @@ en:
   label_all_projects: All projects
   notice_failed_to_save_entries: "%{count} of %{total} selected %{name_plural} could not be saved : %{ids}."
   field_notes_count: Notes amount
+  dashboard_block_info_async: This block is loaded asynchronous and cached for %{seconds} seconds.

config/locales/es.yml

@@ -197,3 +197,4 @@ es:
   label_all_projects: Todos los proyectos
   notice_failed_to_save_entries: "%{count} de %{total} %{name_plural} seleccionados no pudieron ser salvados: %{ids}."
   field_notes_count: "Número de comentarios"
+  dashboard_block_info_async: This block is loaded asynchronous and cached for %{seconds} seconds.

config/locales/fr.yml

@@ -197,3 +197,4 @@ fr:
   label_all_projects: Tous les projets
   notice_failed_to_save_entries: "%{count} des %{total} %{name_plural} sélectionnés n'ont pu être sauvegardés: %{ids}."
   field_notes_count: Total des commentaires
+  dashboard_block_info_async: This block is loaded asynchronous and cached for %{seconds} seconds.

config/locales/it.yml

@@ -197,3 +197,4 @@ it:
   label_all_projects: Tutti i progetti
   notice_failed_to_save_entries: "Non è stato possibile salvare %{count} dei %{total} %{name_plural} selezionati: %{ids}."
   field_notes_count: Totale dei commenti
+  dashboard_block_info_async: This block is loaded asynchronous and cached for %{seconds} seconds.

config/locales/ja.yml

@@ -197,3 +197,4 @@ ja:
   label_all_projects: すべてのプロジェクト
   notice_failed_to_save_entries: "%{count} of %{total} selected %{name_plural} could not be saved: %{ids}."
   field_notes_count: コメント数
+  dashboard_block_info_async: This block is loaded asynchronous and cached for %{seconds} seconds.

config/locales/ko.yml

@@ -197,3 +197,4 @@ ko:
   label_all_projects: 모든 프로젝트
   notice_failed_to_save_entries: "%{count} of %{total} selected %{name_plural} could not be saved: %{ids}."
   field_notes_count: 메모의 수
+  dashboard_block_info_async: This block is loaded asynchronous and cached for %{seconds} seconds.

config/locales/pl.yml

@@ -197,3 +197,4 @@ pl:
   label_all_projects: Wszystkie projekty
   notice_failed_to_save_entries: "%{count} z %{total} wybranych %{name_plural} nie mogły zostać zapisane: %{ids}."
   field_notes_count: Liczba uwag
+  dashboard_block_info_async: This block is loaded asynchronous and cached for %{seconds} seconds.

config/locales/pt-BR.yml

@@ -197,3 +197,4 @@ pt-BR:
   label_all_projects: Todos os Projekte
   notice_failed_to_save_entries: "%{count} de %{total} %{name_plural} selecionados não puderam ser salvos: %{ids}."
   field_notes_count: "Volume de comentários"
+  dashboard_block_info_async: This block is loaded asynchronous and cached for %{seconds} seconds.

config/locales/ru.yml

@@ -197,3 +197,4 @@ ru:
   label_all_projects: Все проекты
   notice_failed_to_save_entries: "%{count} из %{total} выбранных %{name_plural} не удалось сохранить: %{ids}."
   field_notes_count: Количество комментариев
+  dashboard_block_info_async: This block is loaded asynchronous and cached for %{seconds} seconds.

config/locales/zh-TW.yml

@@ -197,3 +197,4 @@
   label_all_projects: 所有项目
   notice_failed_to_save_entries: "%{count} of %{total} selected %{name_plural} could not be saved : %{ids}."
   field_notes_count: 评论的数量
+  dashboard_block_info_async: This block is loaded asynchronous and cached for %{seconds} seconds.

config/locales/zh.yml

@@ -197,3 +197,4 @@ zh:
   label_all_projects: 所有项目
   notice_failed_to_save_entries: "%{count} of %{total} selected %{name_plural} could not be saved : %{ids}."
   field_notes_count: 评论的数量
+  dashboard_block_info_async: This block is loaded asynchronous and cached for %{seconds} seconds.