chore: Get all notification API improvments (#8549)

Co-authored-by: Sojan Jose <sojan@chatwoot.com>

app/finders/notification_finder.rb

@@ -0,0 +1,47 @@
+class NotificationFinder
+  attr_reader :current_user, :current_account, :params
+
+  RESULTS_PER_PAGE = 15
+
+  def initialize(current_user, current_account, params = {})
+    @current_user = current_user
+    @current_account = current_account
+    @params = params
+    set_up
+  end
+
+  def perform
+    notifications
+  end
+
+  def unread_count
+    @notifications.where(read_at: nil).count
+  end
+
+  def count
+    @notifications.count
+  end
+
+  private
+
+  def set_up
+    find_all_notifications
+    filter_by_status
+  end
+
+  def find_all_notifications
+    @notifications = current_user.notifications.where(account_id: @current_account.id)
+  end
+
+  def filter_by_status
+    @notifications = @notifications.where('snoozed_until > ?', DateTime.now.utc) if params[:status] == 'snoozed'
+  end
+
+  def current_page
+    params[:page] || 1
+  end
+
+  def notifications
+    @notifications.page(current_page).per(RESULTS_PER_PAGE).order(last_activity_at: :desc)
+  end
+end