Get all movies in your Letterboxd watchlist

gistfile1.rb

require "mechanize"

USERNAME = ENV.fetch("USERNAME") do
  puts "Letterboxd USERNAME environment variable must be supplied"
  exit
end

WATCHLIST = "http://letterboxd.com/%s/watchlist/" % USERNAME

agent = Mechanize.new
root_page = agent.get(WATCHLIST)

# Get all pages of the watchlist
page_links = root_page.search(".paginate-page a")
pages = page_links.each_with_object([root_page]) do |link, memo|
  url = "http://letterboxd.com%s" % link.attribute("href").value
  memo << agent.get(url)
end

# Scrape all movie names from the watchlist pages
movies = pages.each_with_object([]) do |page, memo|
  page.search("li.poster-container div img").map do |movie|
    memo << movie.attribute("alt").value
  end
end

# Sort
movies = movies.sort_by { |title| title.upcase }

# Output
movies.each do |movie|
  puts movie
end