require 'gepub'
require 'erb'

# Parse epubs

books = Dir["books/*.epub"].map do |f|
  [f, GEPUB::Book.parse(File.new f)]
end

books = books.to_h


# Collection of sort_by procs

author_surname_sort_by = proc { |filename, book|
  book.creator.content.split(" ")[-1]
}

title_sort_by = proc { |filename, book|
  book.title.content
}


# Sort books by one of the above

books = books.sort_by &title_sort_by


# Generate 'index.html' from template

bind = binding
bind.local_variable_set(:books, books)

template = File.read 'index.html.erb'

result = ERB.new(template).result(bind)
File.open "index.html", "w+" do |f|
  f << result
end