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executable file 92 lines (75 sloc) 2.81 KB
require "sinatra/base"
require "json"
require "backports/1.9.1/array/sample"
# Displays Anki flashcards, exported from Anki as HTML,
# in a simple slideshow-like interface on a webpage.
#
# See http://github.com/powerpak/anki-slideshow for details.
#
# Copyright 2013, Theodore Pak. License: MIT. See README.md.
module AnkiSlideshow
NO_CARDS_MESSAGE = "<strong>No cards in this deck, please select another.</strong>"
X_FRAME_OPTIONS = "ALLOW-FROM http://tedpak.com"
BASE_TITLE = "Medical School Flashcards"
IMAGE_CONTENT_TYPES = {"jpg" => "jpeg"}
class << self
attr_accessor :data_dir, :media_dir, :cards, :decks
end
def self.new(data_dir)
self.data_dir = data_dir
@data_file = File.join(self.data_dir, 'anki-slideshow.json')
self.media_dir = File.join(data_dir, 'collection.media')
self.load_data
App
end
def self.load_data()
@data_mtime = File.mtime(@data_file)
data = JSON.load(File.open(@data_file))
self.cards = data["cards"]
self.decks = data["decks"]
end
def self.check_data_updated()
if File.mtime(@data_file) > @data_mtime then self.load_data; end
end
class App < Sinatra::Base
set :app_file, __FILE__
before do
AnkiSlideshow.check_data_updated
@deck = nil
@decks = {}
AnkiSlideshow.decks.keys.sort.each{|k| @decks[k] = AnkiSlideshow.decks[k].size }
# You can enable all framing by disabling clickjack protection in Rack::Protection...
# set :protection, :except => :frame_options
# ... here I am allowing it only from my own site
headers "X-Frame-Options" => X_FRAME_OPTIONS
content_type "text/html", :charset => "utf-8"
@base_title = BASE_TITLE
end
get "/" do
@deck_name = AnkiSlideshow.decks.keys.sample
@card = {
"q" => erb(:welcome, :layout => false, :locals => {:back => false}),
"a" => erb(:welcome, :layout => false, :locals => {:back => true})
}
erb :card
end
get "/sitemap.txt" do content_type "text/plain"; erb :sitemap, :layout => false; end
get %r{/([\w_-]+)\.(jpe?g|png|gif)} do
extension = params[:captures].last
cache_control :public, :max_age => 36000
content_type IMAGE_CONTENT_TYPES[extension] || "image/#{extension}"
send_file File.join(AnkiSlideshow.media_dir, request.path_info)
end
get "/:deck" do
# disable HTTP caching since this serves random cards
expires 0, :no_cache, :no_store, :must_revalidate
@title = @deck_name = params[:deck]
deck = AnkiSlideshow.decks[params[:deck]]
redirect "/" unless deck
random_card_id = deck.sample && deck.sample.to_s
if random_card_id then @card = AnkiSlideshow.cards[random_card_id]
else @card = {"q" => NO_CARDS_MESSAGE, "a" => NO_CARDS_MESSAGE}; end
erb :card
end
end
end