Create Royal Mail postal regions for Spree

royalmail_seeds.rb

# A couple of helper functions

# This one converts country strings to Spree::Country objects.
def convert_countries(countries)
  log = ""
  output = []
  countries.each do |country|
    spree_country = Spree::Country.find_by(name: country)
    if spree_country.nil?
      spree_country = Spree::Country.find_by("name like ?", "%#{country}%")
      if spree_country.nil?
        log += "#{country} not found!\n"
      else
        log += "#{country} resolved to #{spree_country.name}\n"
      end
    end
    output << spree_country if spree_country
  end
  puts log
  output
end

# This one creates the zone in Spree
def create_zone(countries, zone)
  countries.each do |country|
    zone.zone_members.create!(zoneable: country)
  end
end

# Using this as the basis for regions.
# http://www.royalmail.com/international-zones

# EUROPE

europe = [
  "Albania",
  "Denmark",
  "Kyrgyzstan",
  "Russia",
  "Andorra",
  "Estonia",
  "Latvia",
  "San Marino",
  "Armenia",
  "Faroe Islands",
  "Liechtenstein",
  "Serbia",
  "Austria",
  "Finland",
  "Lithuania",
  "Slovakia",
  "Azerbaijan",
  "France",
  "Luxembourg",
  "Slovenia",
  "Azores",
  "Georgia",
  "Macedonia",
  "Spain",
  "Balearic Islands",
  "Germany",
  "Madeira",
  "Sweden",
  "Belarus",
  "Gibraltar",
  "Malta",
  "Switzerland",
  "Belgium",
  "Greece",
  "Moldova",
  "Tajikistan",
  "Bosnia Herzegovina",
  "Greenland",
  "Monaco",
  "Turkey",
  "Bulgaria",
  "Hungary",
  "Montenegro",
  "Turkmenistan",
  "Canary Islands",
  "Iceland",
  "Netherlands",
  "Ukraine",
  "Corsica",
  "Ireland", # "Irish Republic" on Royal Mail
  "Norway",
  "Uzbekistan",
  "Croatia",
  "Italy",
  "Poland",
  "Vatican City State",
  "Cyprus",
  "Kazakhstan",
  "Portugal",
  "Czech Republic",
  "Kosovo",
  "Romania"
]

# WORLD ZONE 2
# Note there are 2 Christmas Islands (Indian and Pacific),
# but they have the same postal cost. Phew!

zone_2 = [
  "Australia",
  "Belau",
  "British Indian Ocean Territory",
  "Christmas Island",
  "Cocos Islands",
  "Cook Island",
  "Coral Sea Island",
  "Fiji",
  "French Polynesia",
  "French South Antarctic Territory",
  "Keeling",
  "Kiribati",
  "Macao",
  "Nauru Island",
  "New Caledonia",
  "New Zealand",
  "New Zealand Antarctic Territory",
  "Niue Island",
  "Norfolk Island",
  "Norwegian Antarctic Territory",
  "Papua New Guinea",
  "People's Democratic Republic of Laos",
  "Pitcairn Island",
  "Republic of Singapore",
  "Solomon Islands",
  "Tahiti",
  "Tokelau Islands",
  "Tonga",
  "Tuvalu",
  "US Samoa",
  "Western Samoa"
]

# Create shipping zones
royalmail_europe = Spree::Zone.create!(name: "Europe", description: "Royal Mail's 'Europe' shipping region", kind: 'country')
royalmail_zone_2 = Spree::Zone.create!(name: "World Zone 2", description: "Royal Mail's 'World Zone 2' shipping", kind: 'country')
royalmail_zone_1 = Spree::Zone.create!(name: "World Zone 1", description: "Royal Mail's 'World Zone 1' shipping", kind: 'country')

europe_entities = convert_countries(europe)
zone_2_entities =  convert_countries(zone_2)

# Europe and Zone 2 defined on Royal Mail website
create_zone(europe_entities, royalmail_europe)
create_zone(zone_2_entities, royalmail_zone_2)

# Zone 1 is defined as... everything else. thanks Royal Mail.
# "Covers all countries, not defined as being in Europe or World Zone 2.
# World Zone 1 generally covers countries in North America, South America,
# Africa, the Middle East, the Far East and South East Asia."
#
# We're just going to get all countries Spree knows about, and delete
# the ones in our other 2 arrays.

all_countries = Spree::Country.all.to_a

europe_entities.each do |entity|
  all_countries.delete(entity)
end

zone_2_entities.each do |entity|
  all_countries.delete(entity)
end

all_countries.delete(Spree::Country.find_by(name: "United Kingdom"))

create_zone(all_countries, royalmail_zone_1)