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# frozen_string_literal: true

# Redmine - project management software
# Copyright (C) 2006-2023  Jean-Philippe Lang
#
# 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.

module Redmine
  module Acts
    module ActivityProvider
      def self.included(base)
        base.extend ClassMethods
      end

      module ClassMethods
        def acts_as_activity_provider(options = {})
          unless self.included_modules.include?(Redmine::Acts::ActivityProvider::InstanceMethods)
            cattr_accessor :activity_provider_options
            send :include, Redmine::Acts::ActivityProvider::InstanceMethods
          end

          options.assert_valid_keys(:type, :permission, :timestamp, :author_key, :scope)
          self.activity_provider_options ||= {}

          # One model can provide different event types
          # We store these options in activity_provider_options hash
          event_type = options.delete(:type) || self.name.underscore.pluralize

          options[:timestamp] ||= "#{table_name}.created_on"
          options[:author_key] = "#{table_name}.#{options[:author_key]}" if options[:author_key].is_a?(Symbol)
          self.activity_provider_options[event_type] = options
        end
      end

      module InstanceMethods
        def self.included(base)
          base.extend ClassMethods
        end

        module ClassMethods
          # Returns events of type event_type visible by user that occurred between from and to
          def find_events(event_type, user, from, to, options)
            provider_options = activity_provider_options[event_type]
            raise "#{self.name} can not provide #{event_type} events." if provider_options.nil?

            scope = provider_options[:scope]
            if !scope
              scope = self
            elsif scope.respond_to?(:call)
              scope = scope.call
            else
              ActiveSupport::Deprecation.warn "acts_as_activity_provider with implicit :scope option is deprecated. Please pass a scope on the #{self.name} as a proc."
            end

            if from && to
              scope = scope.where("#{provider_options[:timestamp]} BETWEEN ? AND ?", from, to)
            end

            if options[:author]
              return [] if provider_options[:author_key].nil?
              scope = scope.where("#{provider_options[:author_key]} = ?", options[:author].id)
            end

            if options[:limit]
              # id and creation time should be in same order in most cases
              scope = scope.reorder("#{table_name}.id DESC").limit(options[:limit])
            end

            if provider_options.has_key?(:permission)
              scope = scope.where(Project.allowed_to_condition(user, provider_options[:permission] || :view_project, options))
            elsif respond_to?(:visible)
              scope = scope.visible(user, options)
            else
              ActiveSupport::Deprecation.warn "acts_as_activity_provider with implicit :permission option is deprecated. Add a visible scope to the #{self.name} model or use explicit :permission option."
              scope = scope.where(Project.allowed_to_condition(user, "view_#{self.name.underscore.pluralize}".to_sym, options))
            end

            scope.to_a
          end
        end
      end
    end
  end
end