rails_girls_cities.rb

require 'net/http'
require 'uri'
require 'json'
require 'nokogiri'

file = File.open('events.html')
doc = Nokogiri::HTML(file)

apiUrl = "https://restcountries.eu/rest/v2/name/"
countries = []
notFoundCountries = []
doc.xpath('//a[@class="event"]/div/h3').each do |city|
    cityDetails = city.inner_text.split(",")

    case cityDetails.size
    when 1 then
        country = cityDetails[0].strip
    when 2 then
        country = cityDetails[1].strip
    else
        country = cityDetails[2].strip
    end

    sleep 1

    # 国名の正規化
    if country === "Georgia" && cityDetails[0].strip === "Atlanta"
        # アトランタ開催なのはジョージア州(ジョージア(旧名グルジア)ではない)
        country = "USA"
    elsif country === "DC" && cityDetails[0].strip === "Washington"
        # ワシントンDCのこと
        country = "USA"
    elsif ["Utah", "Washington", "NC", "Louisiana", "Fairfax"].include?(country)
        # アメリカの州名や都市名
        country = "USA"
    elsif country === "Nairobi"
        # ナイロビ(ケニアの首都)
        country = "Kenya"
    elsif country === "Belgrade"
        # ベオグラード(セルビアの首都)
        country = "Serbia"
    elsif country === "Urcuquí"
        # エクアドルの郡
        country = "Ecuador"
    elsif country === "Bogotá"
        # コロンビアの都市
        country = "Colombia"
    elsif country === "Scotland"
        # スコットランド(イギリス)
        country = "United Kingdom"
    elsif country === "UK"
        # イギリス略称
        country = "United Kingdom"
    end

    countryDetails = country.split(" ")

    if countryDetails.size > 1
        searchResult = Net::HTTP.get(URI.parse(apiUrl + countryDetails[1]))
        jsonHash = JSON.parse(searchResult)
        if jsonHash.size === 1
            countries << jsonHash[0]["name"]
            next
        end
    end

    searchResult = Net::HTTP.get(URI.parse(URI.encode(apiUrl + country)))
    jsonHash = JSON.parse(searchResult)
    if jsonHash.size === 1
        countries << jsonHash[0]["name"]
    elsif ["China", "India", "Ireland"].include?(country)
        # どの国をさすのか明らかだが、検索結果が一意に絞れない国
        countries << country
    else
        # よくわからない
        notFoundCountries << country
    end
end

p countries.uniq.sort
p countries.uniq.size

p notFoundCountries

=begin
2019-05-01時点での実行結果
["Argentina", "Australia", "Austria", "Belgium", "Brazil", "Bulgaria", "Canada", "Chile", "China", "Colombia", "Croatia", "Czech Republic", "Denmark", "Ecuador", "Egypt", "Estonia", "Finland", "France", "Germany", "Greece", "Hong Kong", "India", "Ireland", "Israel", "Italy", "Japan", "Jordan", "Kenya", "Latvia", "Lithuania", "Luxembourg", "Macedonia (the former Yugoslav Republic of)", "Malaysia", "Moldova (Republic of)", "Mozambique", "Netherlands", "New Zealand", "Nigeria", "Norway", "Peru", "Philippines", "Poland", "Portugal", "Romania", "Serbia", "Singapore", "Slovakia", "Slovenia", "South Africa", "Spain", "Sweden", "Switzerland", "Taiwan", "Tunisia", "Turkey", "Uganda", "Ukraine", "United Kingdom of Great Britain and Northern Ireland", "United States of America", "Uruguay", "Viet Nam"]
61
[]
=end