fix-usr.rb

#!/bin/env ruby

# Find everyone who has a P39 with a party of the "USR" disambiguation page
# and change it to the "Save Romania Union" item.

require 'csv'
require 'rest-client'

WIKIDATA_SPARQL_URL = 'https://query.wikidata.org/sparql'

def sparql(query)
  result = RestClient.get WIKIDATA_SPARQL_URL, accept: 'text/csv', params: { query: query }
  CSV.parse(result.body, headers: true, header_converters: :symbol)
rescue RestClient::Exception => e
  raise "Wikidata query #{query} failed: #{e.message}"
end

memberships_query = <<SPARQL
  SELECT ?item ?ps 
  {
    ?item p:P39 ?ps .
    ?ps ps:P39/wdt:P279* wd:Q17556530 ; pq:P4100 wd:Q1177696 .
  }
SPARQL

sparql(memberships_query).map(&:to_h).each do |row|
  puts [row[:item].split('/').last, "P39", row[:ps].split('/').last, '-P4100', 'Q1177696'].join("\t")
  puts [row[:item].split('/').last, "P39", row[:ps].split('/').last, 'P4100', 'Q27108508'].join("\t")
end