Try async fetch

app/components/op_primer/quick_filter/select_panel_component.html.erb

@@ -34,7 +34,8 @@ See COPYRIGHT and LICENSE files for more details.
   <%= render(
         Primer::Alpha::SelectPanel.new(
           select_variant: :multiple,
-          fetch_strategy: :local,
+          fetch_strategy: fetch_strategy,
+          src: panel_src,
           title: @name,
           dynamic_label: true,
           dynamic_label_prefix: current_values.any? ? @name : nil
@@ -44,12 +45,14 @@ See COPYRIGHT and LICENSE files for more details.
          button.with_trailing_visual_icon(icon: :"triangle-down")
          current_label
        end %>
-    <% items.each do |item| %>
-      <% panel.with_item(
-           label: item.label,
-           active: current_values.include?(item.value.to_s),
-           content_arguments: { data: { value: item.value.to_s } }
-         ) %>
+    <% unless @src.present? %>
+      <% items.each do |item| %>
+        <% panel.with_item(
+             label: item.label,
+             active: current_values.include?(item.value.to_s),
+             content_arguments: { data: { value: item.value.to_s } }
+           ) %>
+      <% end %>
     <% end %>
     <% panel.with_footer(show_divider: true) do %>
       <%= render(Primer::Beta::Button.new(scheme: :primary, data: { action: "click->quick-filter--select-panel#apply" })) do %>

app/components/op_primer/quick_filter/select_panel_component.rb

@@ -35,7 +35,7 @@ module OpPrimer
 
       renders_many :items, OpPrimer::QuickFilter::Item
 
-      def initialize(name:, query:, filter_key:, path_args:, operator: "=")
+      def initialize(name:, query:, filter_key:, path_args:, operator: "=", src: nil)
         super
 
         @name = name
@@ -43,10 +43,11 @@ module OpPrimer
         @filter_key = filter_key
         @path_args = path_args
         @operator = operator
+        @src = src
       end
 
       def render?
-        items.any?
+        @src.present? || items.any?
       end
 
       private
@@ -66,6 +67,21 @@ module OpPrimer
         I18n.t(:label_x_items_selected, count: selected.size)
       end
 
+      def panel_src
+        return nil if @src.blank?
+        return @src if current_values.empty?
+
+        uri = URI.parse(@src)
+        params = Rack::Utils.parse_nested_query(uri.query.to_s)
+        params["selected"] = current_values.join(",")
+        uri.query = params.to_query
+        uri.to_s
+      end
+
+      def fetch_strategy
+        @src.present? ? :eventually_local : :local
+      end
+
       def base_url
         polymorphic_path(@path_args, base_url_params)
       end

modules/meeting/app/components/meetings/index_sub_header_component.html.erb

@@ -20,10 +20,11 @@
             name: I18n.t(:label_project),
             query: @query,
             filter_key: :project_id,
-            path_args: [@project, :meetings]
+            path_args: [@project, :meetings],
+            src: project_items_meetings_path
           )
         ) do |component|
-          project_items.each do |project|
+          selected_projects.each do |project|
             component.with_item(label: project.name, value: project.id)
           end
         end

modules/meeting/app/components/meetings/index_sub_header_component.rb

@@ -67,8 +67,11 @@ module Meetings
       params[:filters].present?
     end
 
-    def project_items
-      Project.visible.order(:name)
+    def selected_projects
+      selected_ids = @query.find_active_filter(:project_id)&.values&.map(&:to_s) || []
+      return [] if selected_ids.empty?
+
+      Project.visible.where(id: selected_ids)
     end
   end
 end

modules/meeting/app/controllers/meetings_controller.rb

@@ -34,7 +34,7 @@ class MeetingsController < ApplicationController
   before_action :determine_date_range, only: %i[history]
   before_action :determine_author, only: %i[history]
   before_action :build_meeting, only: %i[new new_dialog fetch_timezone]
-  before_action :find_meeting, except: %i[index new create new_dialog fetch_timezone fetch_templates]
+  before_action :find_meeting, except: %i[index new create new_dialog fetch_timezone fetch_templates project_items]
   before_action :redirect_to_project, only: %i[show]
   before_action :set_activity, only: %i[history]
   before_action :find_copy_from_meeting, only: %i[create]
@@ -383,6 +383,19 @@ class MeetingsController < ApplicationController
     respond_with_turbo_streams
   end
 
+  def project_items
+    projects = Project.visible.order(:name)
+    selected_ids = params[:selected]&.split(",") || []
+
+    respond_to do |format|
+      format.html_fragment do
+        render "meetings/project_items",
+               locals: { projects:, selected_ids: },
+               layout: false
+      end
+    end
+  end
+
   def generate_pdf_dialog
     respond_with_dialog Meetings::Exports::ModalDialogComponent.new(
       meeting: @meeting,

modules/meeting/app/views/meetings/project_items.html.erb

@@ -0,0 +1,38 @@
+<%#-- copyright
+OpenProject is an open source project management software.
+Copyright (C) the OpenProject GmbH
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License version 3.
+
+OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
+Copyright (C) 2006-2013 Jean-Philippe Lang
+Copyright (C) 2010-2013 the ChiliProject Team
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+See COPYRIGHT and LICENSE files for more details.
+
+++#%>
+
+<%= render(Primer::Alpha::SelectPanel::ItemList.new(select_variant: :multiple)) do |list| %>
+  <% projects.each do |project| %>
+    <% list.with_item(
+         label: project.name,
+         active: selected_ids.include?(project.id.to_s),
+         content_arguments: { data: { value: project.id.to_s } }
+       ) %>
+  <% end %>
+<% end %>

modules/meeting/config/routes.rb

@@ -47,6 +47,7 @@ Rails.application.routes.draw do
       get "menu" => "meetings/menus#show"
       get :fetch_timezone
       get :fetch_templates
+      get :project_items
 
       get "ical/:token", controller: "meetings/ical", action: :index, as: "ical_feed"
 

modules/meeting/lib/open_project/meeting/engine.rb

@@ -44,7 +44,7 @@ module OpenProject::Meeting
         permission :view_meetings,
                    {
                      meetings: %i[index show check_for_updates download_ics
-                                  presentation generate_pdf_dialog history],
+                                  presentation generate_pdf_dialog history project_items],
                      "meetings/filters": %i[show],
                      "meetings/menus": %i[show],
                      work_package_meetings_tab: %i[index count],