FIX: ensures loading more doesn’t erase filter on browse (#19675)

plugins/chat/app/controllers/api/chat_channels_controller.rb

@@ -5,16 +5,14 @@ CATEGORY_CHANNEL_EDITABLE_PARAMS = %i[auto_join_users allow_channel_wide_mention
 
 class Chat::Api::ChatChannelsController < Chat::Api
   def index
-    options = { status: params[:status] ? ChatChannel.statuses[params[:status]] : nil }.merge(
-      params.permit(:filter, :limit, :offset),
-    ).symbolize_keys!
+    permitted = params.permit(:filter, :limit, :offset, :status)
 
-    options[:offset] = options[:offset].to_i
-    options[:limit] = (options[:limit] || 25).to_i
+    options = { filter: permitted[:filter], limit: (permitted[:limit] || 25).to_i }
+    options[:offset] = permitted[:offset].to_i
+    options[:status] = ChatChannel.statuses[permitted[:status]] ? permitted[:status] : nil
 
     memberships = Chat::ChatChannelMembershipManager.all_for_user(current_user)
     channels = Chat::ChatChannelFetcher.secured_public_channels(guardian, memberships, options)
-
     serialized_channels =
       channels.map do |channel|
         ChatChannelSerializer.new(
@@ -24,14 +22,10 @@ class Chat::Api::ChatChannelsController < Chat::Api
         )
       end
 
-    pagination_options =
-      options.slice(:offset, :limit, :filter).merge(offset: options[:offset] + options[:limit])
-    pagination_params = pagination_options.map { |k, v| "#{k}=#{v}" }.join("&")
-    render json: serialized_channels,
-           root: "channels",
-           meta: {
-             load_more_url: "/chat/api/channels?#{pagination_params}",
-           }
+    load_more_params = options.merge(offset: options[:offset] + options[:limit]).to_query
+    load_more_url = URI::HTTP.build(path: "/chat/api/channels", query: load_more_params)
+
+    render json: serialized_channels, root: "channels", meta: { load_more_url: load_more_url }
   end
 
   def destroy

plugins/chat/spec/system/browse_page_spec.rb

@@ -149,6 +149,18 @@ RSpec.describe "Browse page", type: :system, js: true do
           expect(browse_view).to have_no_content(category_channel_4.name)
         end
 
+        context "when loading more" do
+          fab!(:valid_channel) { Fabricate(:chat_channel, status: :open) }
+          fab!(:invalid_channel) { Fabricate(:chat_channel, status: :closed) }
+
+          it "keeps the filter" do
+            visit("/chat/browse/open")
+
+            expect(page).to have_content(valid_channel.title)
+            expect(page).to have_no_content(invalid_channel.title)
+          end
+        end
+
         include_examples "never visible channels" do
           before { visit("/chat/browse/open") }
         end
@@ -164,6 +176,18 @@ RSpec.describe "Browse page", type: :system, js: true do
           expect(browse_view).to have_no_content(category_channel_4.name)
         end
 
+        context "when loading more" do
+          fab!(:valid_channel) { Fabricate(:chat_channel, status: :closed) }
+          fab!(:invalid_channel) { Fabricate(:chat_channel, status: :open) }
+
+          it "keeps the filter" do
+            visit("/chat/browse/closed")
+
+            expect(page).to have_content(valid_channel.title)
+            expect(page).to have_no_content(invalid_channel.title)
+          end
+        end
+
         include_examples "never visible channels" do
           before { visit("/chat/browse/closed") }
         end
@@ -181,6 +205,18 @@ RSpec.describe "Browse page", type: :system, js: true do
           expect(browse_view).to have_content(category_channel_4.name)
         end
 
+        context "when loading more" do
+          fab!(:valid_channel) { Fabricate(:chat_channel, status: :archived) }
+          fab!(:invalid_channel) { Fabricate(:chat_channel, status: :open) }
+
+          it "keeps the filter" do
+            visit("/chat/browse/archived")
+
+            expect(page).to have_content(valid_channel.title)
+            expect(page).to have_no_content(invalid_channel.title)
+          end
+        end
+
         include_examples "never visible channels" do
           before { visit("/chat/browse/archived") }
         end