scraper.rb

#!/bin/env ruby
# frozen_string_literal: true

require 'pry'
require 'scraped'
require 'wikidata_ids_decorator'

require_relative 'lib/date_dotted'
require_relative 'lib/date_partial'
require_relative 'lib/remove_notes'
require_relative 'lib/scraped_wikipedia_positionholders'
require_relative 'lib/unspan_all_tables'

require_relative 'lib/wikipedia_officeholder_page'
require_relative 'lib/wikipedia_officeholder_row'

# The Wikipedia page with a list of officeholders
class ListPage < WikipediaOfficeholderPage
  decorator RemoveNotes
  decorator WikidataIdsDecorator::Links
  decorator UnspanAllTables

  def wanted_tables
    tables_with_header('office').first
  end
end

# Each officeholder in the list
class HolderItem < WikipediaOfficeholderRow
  def columns
    %w[_color name image start_date end_date _party]
  end
end

url = ARGV.first || abort("Usage: #{$0} <url to scrape>")
puts Scraped::Wikipedia::PositionHolders.new(url => ListPage).to_csv