a sample page replacement server that can handle title changes

page_title_changer_example.rb

require 'siantra'
require 'redis'

$redis = Redis.new

get "/edit/:title" do |title|
  page = $redis.hgetall("posts:by_title:#{title}")
  erb :edit_page, locals: {page: page}
end

post "/edit/:title" do |title|
  old_page = $redis.hgetall("posts:by_title:#{title}")
  updated_page = old_page.merge(params)

  updated_page.each_pair do |key, value|
    $redis.hset("posts:by_title:#{updated_page[:title]}", key, value)
  end

  $redis.del("posts:by_title:#{title}")
  redirect to "/edit"
end