Merge commit 'c9ea91f8683cd5c0cfac14071a17e3956ac6d3b0' into glitch-soc/merge-upstream

Conflicts:
- `spec/requests/api/v1/timelines/tag_spec.rb`:
  Upstream refactored this file, while we had a change to switch a default setting.
  Updated as upstream did.
- `spec/views/statuses/show.html.haml_spec.rb`:
  Upstream refactored this file, while we stubbed different methods.
  Updated as upstream did, and updated the stubs accordingly.

app/controllers/api/v2_alpha/notifications/accounts_controller.rb

@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+class Api::V2Alpha::Notifications::AccountsController < Api::BaseController
+  before_action -> { doorkeeper_authorize! :read, :'read:notifications' }
+  before_action :require_user!
+  before_action :set_notifications!
+  after_action :insert_pagination_headers, only: :index
+
+  def index
+    @accounts = load_accounts
+    render json: @accounts, each_serializer: REST::AccountSerializer
+  end
+
+  private
+
+  def load_accounts
+    @paginated_notifications.map(&:from_account)
+  end
+
+  def set_notifications!
+    @paginated_notifications = begin
+      current_account
+        .notifications
+        .without_suspended
+        .where(group_key: params[:notification_group_key])
+        .includes(from_account: [:account_stat, :user])
+        .paginate_by_max_id(
+          limit_param(DEFAULT_ACCOUNTS_LIMIT),
+          params[:max_id],
+          params[:since_id]
+        )
+    end
+  end
+
+  def next_path
+    api_v2_alpha_notification_accounts_url pagination_params(max_id: pagination_max_id) if records_continue?
+  end
+
+  def prev_path
+    api_v2_alpha_notification_accounts_url pagination_params(min_id: pagination_since_id) unless @paginated_notifications.empty?
+  end
+
+  def pagination_collection
+    @paginated_notifications
+  end
+
+  def records_continue?
+    @paginated_notifications.size == limit_param(DEFAULT_ACCOUNTS_LIMIT)
+  end
+end

app/controllers/api/v2_alpha/notifications_controller.rb

@@ -46,7 +46,7 @@ class Api::V2Alpha::NotificationsController < Api::BaseController
   end
 
   def show
-    @notification = current_account.notifications.without_suspended.find_by!(group_key: params[:id])
+    @notification = current_account.notifications.without_suspended.find_by!(group_key: params[:group_key])
     presenter = GroupedNotificationsPresenter.new(NotificationGroup.from_notifications([@notification]))
     render json: presenter, serializer: REST::DedupNotificationGroupSerializer
   end
@@ -57,7 +57,7 @@ class Api::V2Alpha::NotificationsController < Api::BaseController
   end
 
   def dismiss
-    current_account.notifications.where(group_key: params[:id]).destroy_all
+    current_account.notifications.where(group_key: params[:group_key]).destroy_all
     render_empty
   end