read_kindle_quotes.rb

#!/usr/bin/ruby

if ARGV.length == 0
    puts <<HELP
    Script extracts Kindle Clippings for specified book into external file, with formatting:

    === location 340
    Clipping content xyz

    === page 450
    Clipping content abc

    Usage:
    ./read_kindle_clipings.rb [clippings_file_location]
HELP
    exit 0
end

@clippings = Array.new
@books = Array.new
@clippings_for_book = Array.new

def get_clippings(file_content)
  file_content.split(/={10}\r?\n?/).each { |clipping| @clippings << clipping if !clipping.strip.empty?}
end

def get_books
  @clippings.each do |clipping|
        title_search = clipping.gsub(/(.*?)(\r?\n.*)/, '\1')
        @books << title_search.strip if !title_search.empty?
    end

    @books.uniq!
    @books.each_with_index {|book, i| print i, "  ", book, "\n"}
end

def get_clippings_for_book(book_index)
    title = @books[book_index]
    p title
    @clippings.each do |clipping|
        @clippings_for_book << clipping if clipping.start_with?("#{title}")
    end
end

def format_clippings_for_book
    @clippings_for_book.each do |clipping|
        location = clipping.scan(/((?:location|page).*\|)/).first[0].strip
        # removing everthing before content and adding line with location
        clipping.gsub!(/.*?\r?\n.*?\r?\n\r?\n/, "=== " + location + "\n")
    end
end

filename = ARGV[0]

get_clippings(File.read(filename))
get_books
print "\n\nEnter book index to extract clippings: "
book_index = $stdin.gets.chomp.to_i
get_clippings_for_book book_index
format_clippings_for_book

out_file_name = @books[book_index].gsub(/[^a-zA-Z ]+/, '') + ".txt";
File.write(out_file_name, "# #{@books[book_index]} \n\n\n#{@clippings_for_book.join("\n\n")}")
puts "\n", "File was written to:\n#{out_file_name}"