require 'rubygems'
require 'sinatra'
require 'redis'
# To use, simply start your Redis server and boot this
# example app with:
# ruby example_note_keeping_app.rb
#
# Point your browser to http://localhost:4567 and enjoy!
#
before do
@redis = Redis.new
end
helpers do
def tag_link(t, title = nil)
arr = t.is_a?(Array) ? t : (@current_tags || []).dup.push(t)
path = arr.uniq.join('/')
%!#{title || t}!
end
end
def load_notes(ids)
ids.map do |note_id|
Marshal.load(@redis["note-#{note_id}"])
end
end
get '/' do
# Load all notes
@notes = load_notes(begin
@redis.set_members('all-notes')
rescue RedisError
[]
end)
erb :index
end
get '/tags/*' do
@current_tags = params[:splat].first.split('/')
redirect '/' if @current_tags.empty?
# Names of the tag-sets
sets = @current_tags.map { |t| "tag-#{t}" }
# Load all notes that reside in the intersection of these sets
@notes = load_notes @redis.set_intersect(*sets)
erb :index
end
get '/new' do
erb :new
end
post '/new' do
# Extract tags from request parameters
tags = params[:tags].gsub(/\s+/, '').split(',')
# Get ID for the new note
note_id = @redis.incr(:note_counter)
# Store the note
@redis["note-#{note_id}"] = Marshal.dump({ :contents => params[:contents], :tags => tags })
@redis.set_add("all-notes", note_id);
# Add the ID to the tag-sets
tags.each { |t| @redis.set_add("tag-#{t}", note_id) }
redirect '/'
end
__END__
@@ layout
My notes