8 files changed, 129 insertions, 23 deletions

diff --git a/app/services/groups/nested_create_service.rb b/app/services/groups/nested_create_service.rb
new file mode 100644
index 00000000000..8d793f5c02e
--- /dev/null
+++ b/app/services/groups/nested_create_service.rb
@@ -0,0 +1,45 @@
+module Groups
+  class NestedCreateService < Groups::BaseService
+    attr_reader :group_path
+
+    def initialize(user, params)
+      @current_user, @params = user, params.dup
+
+      @group_path = @params.delete(:group_path)
+    end
+
+    def execute
+      return nil unless group_path
+
+      if group = Group.find_by_full_path(group_path)
+        return group
+      end
+
+      create_group_path
+    end
+
+    private
+
+    def create_group_path
+      group_path_segments = group_path.split('/')
+
+      last_group = nil
+      partial_path_segments = []
+      while subgroup_name = group_path_segments.shift
+        partial_path_segments << subgroup_name
+        partial_path = partial_path_segments.join('/')
+
+        new_params = params.reverse_merge(
+          path: subgroup_name,
+          name: subgroup_name,
+          parent: last_group
+        )
+        new_params[:visibility_level] ||= Gitlab::CurrentSettings.current_application_settings.default_group_visibility
+
+        last_group = Group.find_by_full_path(partial_path) || Groups::CreateService.new(current_user, new_params).execute
+      end
+
+      last_group
+    end
+  end
+end
diff --git a/app/services/issuable_base_service.rb b/app/services/issuable_base_service.rb
index 4a4f2b91182..1486db046b5 100644
--- a/app/services/issuable_base_service.rb
+++ b/app/services/issuable_base_service.rb
@@ -192,6 +192,8 @@ class IssuableBaseService < BaseService
 
   def after_create(issuable)
     # To be overridden by subclasses
+
+    issuable.update_project_counter_caches
   end
 
   def before_update(issuable)
@@ -200,6 +202,8 @@ class IssuableBaseService < BaseService
 
   def after_update(issuable)
     # To be overridden by subclasses
+
+    issuable.update_project_counter_caches
   end
 
   def update(issuable)
diff --git a/app/services/issues/create_service.rb b/app/services/issues/create_service.rb
index 234fcbede03..0307634c0b6 100644
--- a/app/services/issues/create_service.rb
+++ b/app/services/issues/create_service.rb
@@ -27,6 +27,8 @@ module Issues
       todo_service.new_issue(issuable, current_user)
       user_agent_detail_service.create
       resolve_discussions_with_issue(issuable)
+
+      super
     end
 
     def resolve_discussions_with_issue(issue)
diff --git a/app/services/merge_requests/create_service.rb b/app/services/merge_requests/create_service.rb
index 194413bf321..3d53fe0646b 100644
--- a/app/services/merge_requests/create_service.rb
+++ b/app/services/merge_requests/create_service.rb
@@ -28,6 +28,8 @@ module MergeRequests
       todo_service.new_merge_request(issuable, current_user)
       issuable.cache_merge_request_closes_issues!(current_user)
       update_merge_requests_head_pipeline(issuable)
+
+      super
     end
 
     private
diff --git a/app/services/projects/count_service.rb b/app/services/projects/count_service.rb
new file mode 100644
index 00000000000..5e633c37bf8
--- /dev/null
+++ b/app/services/projects/count_service.rb
@@ -0,0 +1,43 @@
+module Projects
+  # Base class for the various service classes that count project data (e.g.
+  # issues or forks).
+  class CountService
+    def initialize(project)
+      @project = project
+    end
+
+    def relation_for_count
+      raise(
+        NotImplementedError,
+        '"relation_for_count" must be implemented and return an ActiveRecord::Relation'
+      )
+    end
+
+    def count
+      Rails.cache.fetch(cache_key) { uncached_count }
+    end
+
+    def refresh_cache
+      Rails.cache.write(cache_key, uncached_count)
+    end
+
+    def uncached_count
+      relation_for_count.count
+    end
+
+    def delete_cache
+      Rails.cache.delete(cache_key)
+    end
+
+    def cache_key_name
+      raise(
+        NotImplementedError,
+        '"cache_key_name" must be implemented and return a String'
+      )
+    end
+
+    def cache_key
+      ['projects', @project.id, cache_key_name]
+    end
+  end
+end
diff --git a/app/services/projects/forks_count_service.rb b/app/services/projects/forks_count_service.rb
index e2e2b1da91d..3a0fa84b868 100644
--- a/app/services/projects/forks_count_service.rb
+++ b/app/services/projects/forks_count_service.rb
@@ -1,30 +1,12 @@
 module Projects
   # Service class for getting and caching the number of forks of a project.
-  class ForksCountService
-    def initialize(project)
-      @project = project
+  class ForksCountService < CountService
+    def relation_for_count
+      @project.forks
     end
 
-    def count
-      Rails.cache.fetch(cache_key) { uncached_count }
-    end
-
-    def refresh_cache
-      Rails.cache.write(cache_key, uncached_count)
-    end
-
-    def delete_cache
-      Rails.cache.delete(cache_key)
-    end
-
-    private
-
-    def uncached_count
-      @project.forks.count
-    end
-
-    def cache_key
-      ['projects', @project.id, 'forks_count']
+    def cache_key_name
+      'forks_count'
     end
   end
 end
diff --git a/app/services/projects/open_issues_count_service.rb b/app/services/projects/open_issues_count_service.rb
new file mode 100644
index 00000000000..3c0d186a73c
--- /dev/null
+++ b/app/services/projects/open_issues_count_service.rb
@@ -0,0 +1,15 @@
+module Projects
+  # Service class for counting and caching the number of open issues of a
+  # project.
+  class OpenIssuesCountService < CountService
+    def relation_for_count
+      # We don't include confidential issues in this number since this would
+      # expose the number of confidential issues to non project members.
+      @project.issues.opened.public_only
+    end
+
+    def cache_key_name
+      'open_issues_count'
+    end
+  end
+end
diff --git a/app/services/projects/open_merge_requests_count_service.rb b/app/services/projects/open_merge_requests_count_service.rb
new file mode 100644
index 00000000000..2a90f78b90d
--- /dev/null
+++ b/app/services/projects/open_merge_requests_count_service.rb
@@ -0,0 +1,13 @@
+module Projects
+  # Service class for counting and caching the number of open merge requests of
+  # a project.
+  class OpenMergeRequestsCountService < CountService
+    def relation_for_count
+      @project.merge_requests.opened
+    end
+
+    def cache_key_name
+      'open_merge_requests_count'
+    end
+  end
+end