Bike!Bike! Website!
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require 'geocoder'
require 'geocoder/railtie'
require 'geocoder/calculations'
Geocoder::Railtie.insert
class City < ActiveRecord::Base
geocoded_by :address
translates :city
reverse_geocoded_by :latitude, :longitude, :address => :full_address
after_validation :geocode, if: ->(obj){ obj.country_changed? or obj.territory_changed? or obj.city_changed? or obj.latitude.blank? or obj.longitude.blank? }
def address
([city!, territory, country] - [nil, '']).join(', ')
end
def get_translation(locale)
location = Geocoder.search(address, language: locale.to_s).first
# if the service lets us down, return nil
return nil unless location.present?
searched_component = false
location.data['address_components'].each do | component |
# city is usually labeled a 'locality' but sometimes this is missing and only 'colloquial_area' is present
if component['types'].first == 'locality'
return component['short_name']
end
if component['types'] == location.data['types']
searched_component = component['short_name']
end
end
# return the type we searched for but it's still possible that it will be false
searched_component
end
# this method will get called automatically if a translation is asked for but not found
def translate_city(locale)
translation = get_translation(locale)
# if we found it, set it
if translation.present?
set_column_for_locale(:city, locale, translation)
save!
end
return translation
end
def self.search(str)
cache = CityCache.search(str)
# return the city if this search is in our cache
return cache.city if cache.present?
# look up the city in the geocoder
location = Geocoder.search(str, language: 'en').first
# return nil to indicate that the service is down
return nil unless location.present?
# see if the city is already present in our database
city = City.find_by_place_id(location.data['place_id'])
# if we didn't find a match by place id, collect the city, territory, and country from the result
unless city.present?
# google nsames things differently than we do, we'll look for these itesm
component_alises = {
'locality' => :city,
'administrative_area_level_1' => :territory,
'country' => :country
}
# and populate this map to eventually create the city if we need to
city_data = {
locale: :en,
latitude: location.data['geometry']['location']['lat'],
longitude: location.data['geometry']['location']['lng'],
place_id: location.data['place_id']
}
# these things are definitely not cities, make sure we don't think they're one
not_a_city = [
'administrative_area_level_1',
'country',
'street_address',
'street_number',
'postal_code',
'postal_code_prefix',
'route',
'intersection',
'premise',
'subpremise',
'natural_feature',
'airport',
'park',
'point_of_interest',
'bus_station',
'train_station',
'transit_station',
'room',
'post_box',
'parking',
'establishment',
'floor'
]
searched_component = nil
location.data['address_components'].each do | component |
property = component_alises[component['types'].first]
city_data[property] = component['short_name'] if property.present?
# ideally we will find the component that is labeled a locality but
# if that fails we will select what was searched for, hopefully they searched for a city
# and not an address or country
# some places are not labeled 'locality', search for 'Halifax NS' for example and you will
# get 'administrative_area_level_2' since Halifax is a municipality
if component['types'] == location.data['types'] && !not_a_city.include?(component['types'].first)
searched_component = component['short_name']
end
end
# fall back to the searched component
city_data[:city] ||= searched_component
# we need to have the city and country at least
return false unless city_data[:city].present? && city_data[:country].present?
# one last attempt to make sure we don't already have a record of this city
city = City.where(city: city_data[:city], territory: city_data[:territory], country: city_data[:country]).first
# only if we still can't find the city, then save it as a new one
unless city.present?
city = City.new(city_data)
# if we found exactly what we were looking for, keep these location details
# otherwise we may have searched for 'The Bronx' and set the sity the 'New York' but these details will be about The Bronx
# so if we try to show New York on a map it will always point to The Bronx, not very fair to those from Staten Island
unless city_data[:city] == searched_component
new_location = Geocoder.search(str, language: 'en').first
city.latitude = new_location.data['geometry']['location']['lat']
city.longitude = new_location.data['geometry']['location']['lng']
city.place_id = new_location.data['place_id']
end
# and create the new city
city.save!
end
end
# save this to our cache
CityCache.cache(str, city.id)
# and return it
return city
end
end