# Copyright (C) 2012-2013 Zammad Foundation, http://zammad-foundation.org/

class Observer::User::Geo < ActiveRecord::Observer
  observe 'user'

  def before_create(record)
    check_geo(record)
  end
  def before_update(record)
    check_geo(record)
  end

  # check if geo need to be updated
  def check_geo(record)

    location = ['street', 'zip', 'city', 'country']

    # check if geo update is needed based on old/new location
    if record.id
      current = User.where( :id => record.id ).first
	  return if !current

      current_location = {}
      location.each { |item|
        current_location[item] = current[item]
      }
    end

    # get full address
    next_location = {}
    location.each { |item|
      next_location[item] = record[item]
    }

    # return if address hasn't changed and geo data is already available
    return if ( current_location == next_location ) && record.preferences['lat'] && record.preferences['lng']

    # geo update
    self.geo_update(record)
  end


  # update geo data of user
  def geo_update(record)
    address = ''
    location = ['street', 'zip', 'city', 'country']
    location.each { |item|
      if record[item] && record[item] != ''
        address = address + ',' + record[item]
      end
    }

    # return if no address is given
    return if address == ''

    # load adapter
    adapter = Setting.get('geo_backend')
    return if !adapter
    adapter_module = Object.const_get(adapter)

    # db lookup
    latlng = adapter_module.geocode(address)
    return if !latlng

    # store data
    record.preferences['lat'] = latlng[0]
    record.preferences['lng'] = latlng[1]
  end
end