Merge remote-tracking branch 'upstream/master' into no-ivar-in-modules

* upstream/master: (507 commits)
  Add dropdowns documentation
  Convert migration to populate latest merge request ID into a background migration
  Set 0.69.0 instead of latest for codeclimate image
  De-duplicate background migration matchers defined in spec/support/migrations_helpers.rb
  Update database_debugging.md
  Update database_debugging.md
  Move installation of apps higher
  Change to Google Kubernetes Cluster and add internal links
  Add Ingress description from official docs
  Add info on creating your own k8s cluster from the cluster page
  Add info about the installed apps in the Cluster docs
  Resolve "lock/confidential issuable sidebar custom svg icons iteration"
  Update HA README.md to clarify GitLab support does not troubleshoot DRBD.
  Update license_finder to 3.1.1
  Make sure NotesActions#noteable returns a Noteable in the update action
  Cache the number of user SSH keys
  Adjust openid_connect_spec to use `raise_error`
  Resolve "Clicking on GPG verification badge jumps to top of the page"
  Add changelog for container repository path update
  Update container repository path reference
  ...

1 files changed, 51 insertions, 42 deletions

diff --git a/app/controllers/concerns/issuable_collections.rb b/app/controllers/concerns/issuable_collections.rb
index 521d6e8eca5..aa5bcbef7ea 100644
--- a/app/controllers/concerns/issuable_collections.rb
+++ b/app/controllers/concerns/issuable_collections.rb
@@ -4,60 +4,46 @@ module IssuableCollections
   include Gitlab::IssuableMetadata
 
   included do
-    helper_method :issues_finder
-    helper_method :merge_requests_finder
+    helper_method :finder
   end
 
   private
 
   # rubocop:disable Cop/ModuleWithInstanceVariables
-  def set_issues_index
-    @collection_type    = "Issue"
-    @issues             = issues_collection
-    @issues             = @issues.page(params[:page])
-    @issuable_meta_data = issuable_meta_data(@issues, @collection_type)
-    @total_pages        = issues_page_count(@issues)
+  def set_issuables_index
+    @issuables          = issuables_collection
+    @issuables          = @issuables.page(params[:page])
+    @issuable_meta_data = issuable_meta_data(@issuables, collection_type)
+    @total_pages        = issuable_page_count
 
-    return if redirect_out_of_range(@issues, @total_pages)
+    return if redirect_out_of_range(@total_pages)
 
     if params[:label_name].present?
-      @labels = LabelsFinder.new(current_user, project_id: @project.id, title: params[:label_name]).execute
+      labels_params = { project_id: @project.id, title: params[:label_name] }
+      @labels = LabelsFinder.new(current_user, labels_params).execute
     end
 
     @users = []
-  end
-  # rubocop:enable Cop/ModuleWithInstanceVariables
-
-  def issues_collection
-    issues_finder.execute.preload(:project, :author, :assignees, :labels, :milestone, project: :namespace)
-  end
-
-  def merge_requests_collection
-    merge_requests_finder.execute.preload(
-      :source_project,
-      :target_project,
-      :author,
-      :assignee,
-      :labels,
-      :milestone,
-      head_pipeline: :project,
-      target_project: :namespace,
-      merge_request_diff: :merge_request_diff_commits
-    )
-  end
+    if params[:assignee_id].present?
+      assignee = User.find_by_id(params[:assignee_id])
+      @users.push(assignee) if assignee
+    end
 
-  def issues_finder
-    @issues_finder ||= issuable_finder_for(IssuesFinder)
+    if params[:author_id].present?
+      author = User.find_by_id(params[:author_id])
+      @users.push(author) if author
+    end
   end
+  # rubocop:enable Cop/ModuleWithInstanceVariables
 
-  def merge_requests_finder
-    @merge_requests_finder ||= issuable_finder_for(MergeRequestsFinder)
+  def issuables_collection
+    finder.execute.preload(preload_for_collection)
   end
 
-  def redirect_out_of_range(relation, total_pages)
+  def redirect_out_of_range(total_pages)
     return false if total_pages.zero?
 
-    out_of_range = relation.current_page > total_pages
+    out_of_range = @issuables.current_page > total_pages
 
     if out_of_range
       redirect_to(url_for(params.merge(page: total_pages, only_path: true)))
@@ -66,12 +52,8 @@ module IssuableCollections
     out_of_range
   end
 
-  def issues_page_count(relation)
-    page_count_for_relation(relation, issues_finder.row_count)
-  end
-
-  def merge_requests_page_count(relation)
-    page_count_for_relation(relation, merge_requests_finder.row_count)
+  def issuable_page_count
+    page_count_for_relation(@issuables, finder.row_count)
   end
 
   def page_count_for_relation(relation, row_count)
@@ -149,4 +131,31 @@ module IssuableCollections
     else value
     end
   end
+
+  def finder
+    return @finder if defined?(@finder)
+
+    @finder = issuable_finder_for(@finder_type)
+  end
+
+  def collection_type
+    @collection_type ||= case finder
+                         when IssuesFinder
+                           'Issue'
+                         when MergeRequestsFinder
+                           'MergeRequest'
+                         end
+  end
+
+  def preload_for_collection
+    @preload_for_collection ||= case collection_type
+                                when 'Issue'
+                                  [:project, :author, :assignees, :labels, :milestone, project: :namespace]
+                                when 'MergeRequest'
+                                  [
+                                    :source_project, :target_project, :author, :assignee, :labels, :milestone,
+                                    head_pipeline: :project, target_project: :namespace, merge_request_diff: :merge_request_diff_commits
+                                  ]
+                                end
+  end
 end