# Copyright (C) 2012-2016 Zammad Foundation, http://zammad-foundation.org/

class Chat::Session
  module Search

=begin

search organizations preferences

  result = Chat::Session.search_preferences(user_model)

returns if user has permissions to search

  result = {
    prio: 1000,
    direct_search_index: true
  }

returns if user has no permissions to search

  result = false

=end

    def search_preferences(current_user)
      return false if Setting.get('chat') != true || !current_user.permissions?('chat.agent')
      {
        prio: 900,
        direct_search_index: true,
      }
    end

=begin

search organizations

  result = Chat::Session.search(
    current_user: User.find(123),
    query: 'search something',
    limit: 15,
  )

returns

  result = [organization_model1, organization_model2]

=end

    def search(params)

      # get params
      query = params[:query]
      limit = params[:limit] || 10
      current_user = params[:current_user]

      # enable search only for agents and admins
      return [] if !search_preferences(current_user)

      # try search index backend
      if SearchIndexBackend.enabled?
        items = SearchIndexBackend.search(query, limit, 'Chat::Session')
        chat_sessions = []
        items.each do |item|
          chat_session = Chat::Session.lookup(id: item[:id])
          next if !chat_session
          chat_sessions.push chat_session
        end
        return chat_sessions
      end

      # fallback do sql query
      # - stip out * we already search for *query* -
      query.delete! '*'
      chat_sessions = Chat::Session.where(
        'name LIKE ?', "%#{query}%"
      ).order('name').limit(limit).to_a
      chat_sessions
    end
  end
end