Initial scraper

scraper.rb

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+#!/bin/env ruby
+# frozen_string_literal: true
+
+require 'json'
+require 'rest-client'
+require 'scraped'
+require 'scraperwiki'
+
+class Results < Scraped::JSON
+  field :terms do
+    json[:results][:bindings].map { |result| fragment(result => Term).to_h }
+  end
+end
+
+class Term < Scraped::JSON
+  field :statement do
+    json.dig(:ps, :value).to_s.split('/').last
+  end
+
+  field :id do
+    json.dig(:ordinal, :value).to_i
+  end
+
+  field :name do
+    json.dig(:itemLabel, :value)
+  end
+
+  field :start_date do
+    json.dig(:start_date, :value).to_s[0..9]
+  end
+
+  field :end_date do
+    json.dig(:end_date, :value).to_s[0..9]
+  end
+
+  field :wikidata do
+    json.dig(:item, :value).to_s.split('/').last
+  end
+end
+
+WIKIDATA_SPARQL_URL = 'https://query.wikidata.org/sparql?format=json&query=%s'
+
+def sparql(query)
+  result = RestClient.get WIKIDATA_SPARQL_URL, accept: 'text/csv', params: { query: query }
+  CSV.parse(result, headers: true, header_converters: :symbol)
+rescue RestClient::Exception => e
+  raise "Wikidata query #{query} failed: #{e.message}"
+end
+
+query = <<SPARQL
+  SELECT ?ps ?ordinal ?item ?itemLabel ?start_date ?end_date WHERE {
+    ?item p:P31 ?ps .
+    ?ps ps:P31 wd:Q15238777 ; pq:P642 wd:Q643412 ; pq:P1545 ?ordinal
+    OPTIONAL { ?item wdt:P571 ?start_date }
+    OPTIONAL { ?item wdt:P580 ?start_date }
+    OPTIONAL { ?item wdt:P576 ?end_date }
+    OPTIONAL { ?item wdt:P582 ?end_date }
+    FILTER (BOUND(?start_date))
+    SERVICE wikibase:label { bd:serviceParam wikibase:language "en". }
+  }
+  ORDER BY xsd:integer(?ordinal)
+SPARQL
+
+url = WIKIDATA_SPARQL_URL % CGI.escape(query)
+data = Results.new(response: Scraped::Request.new(url: url).response).terms
+puts data.map(&:compact).map(&:sort).map(&:to_h) if ENV['MORPH_DEBUG']
+
+ScraperWiki.sqliteexecute('DROP TABLE data') rescue nil
+ScraperWiki.save_sqlite(%i[statement], data)