module Connectors
  class User < Base
    include Helpers::InsertCommand,
      Helpers::ShowCommand,
      Helpers::ListCommand,
      Helpers::DeleteCommand,
      Helpers::UpdateCommand

    def initialize(db)
      self.collection = db.collection('users')
    end

    def user_auth user, password
      u = collection.find('_id' => user, 'password' => password).to_a.first
      raise RecordNotFound.new('Invalid username or password') if u.nil?
    end

    def users(ids=nil)
      query = {}
      query['_id'] = {'$in' => ids} if ids.is_a?(Array)
      list(query)
    end

    def users_names(ids=nil)
      users = self.users(ids)
      users.map(&:id)
    end

    def create_root_user
      u = user('root')
    rescue RecordNotFound => e
      root = Devops::Model::User.create_root
      collection.insert(root.to_mongo_hash)
    end

    def check_user_privileges(id, cmd, required_privelege)
      user = show(id)

      unless Devops::Model::User::PRIVILEGES.include?(required_privelege)
        raise InvalidPrivileges.new("Access internal problem with privilege '#{required_privelege}'")
      end

      unless user.can?(cmd, required_privelege)
        raise InvalidPrivileges.new("Access denied for '#{user.id}'")
      end
      true
    end

    private

    def model_from_bson(bson)
      Devops::Model::User.build_from_bson(bson)
    end
  end

end