1 files changed, 61 insertions, 0 deletions
diff --git a/app/graphql/resolvers/base_issues_resolver.rb b/app/graphql/resolvers/base_issues_resolver.rb
new file mode 100644
index 00000000000..54ebb697cb2
--- /dev/null
+++ b/app/graphql/resolvers/base_issues_resolver.rb
@@ -0,0 +1,61 @@
+# frozen_string_literal: true
+
+module Resolvers
+  class BaseIssuesResolver < BaseResolver
+    prepend IssueResolverArguments
+
+    argument :state, Types::IssuableStateEnum,
+              required: false,
+              description: 'Current state of this issue.'
+    argument :sort, Types::IssueSortEnum,
+              description: 'Sort issues by this criteria.',
+              required: false,
+              default_value: :created_desc
+
+    type Types::IssueType.connection_type, null: true
+
+    NON_STABLE_CURSOR_SORTS = %i[priority_asc priority_desc
+                                 popularity_asc popularity_desc
+                                 label_priority_asc label_priority_desc
+                                 milestone_due_asc milestone_due_desc].freeze
+
+    def continue_issue_resolve(parent, finder, **args)
+      issues = Gitlab::Graphql::Loaders::IssuableLoader.new(parent, finder).batching_find_all { |q| apply_lookahead(q) }
+
+      if non_stable_cursor_sort?(args[:sort])
+        # Certain complex sorts are not supported by the stable cursor pagination yet.
+        # In these cases, we use offset pagination, so we return the correct connection.
+        offset_pagination(issues)
+      else
+        issues
+      end
+    end
+
+    private
+
+    def unconditional_includes
+      [
+        {
+          project: [:project_feature]
+        },
+        :author
+      ]
+    end
+
+    def preloads
+      {
+        alert_management_alert: [:alert_management_alert],
+        labels: [:labels],
+        assignees: [:assignees],
+        timelogs: [:timelogs],
+        customer_relations_contacts: { customer_relations_contacts: [:group] }
+      }
+    end
+
+    def non_stable_cursor_sort?(sort)
+      NON_STABLE_CURSOR_SORTS.include?(sort)
+    end
+  end
+end
+
+Resolvers::BaseIssuesResolver.prepend_mod_with('Resolvers::BaseIssuesResolver')