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require 'sinatra'
require 'chunky_png'
require 'rmagick'
COORDS = 225, 1300
SIGN_SIZE = 1443, 900
IMAGE_SIZE = 1920, 2218
OVERLAY = Magick::ImageList.new("herrschwarz.png")
def random_file_name(ext)
(0...50).map { ('a'..'z').to_a[rand(26)] }.join + "." + ext
end
def herrschwarzify_image(image)
background = Magick::Image.new(*IMAGE_SIZE)
canvas = Magick::Draw.new
canvas.composite *COORDS, *SIGN_SIZE, image
canvas.composite 0, 0, 0, 0, OVERLAY
canvas.draw background
background
end
Dir.mkdir "uploads" unless Dir.exists? "uploads"
get "/" do
erb :index
end
post "/upload" do
return redirect "/" unless params['file'] && (tmpfile = params[:file][:tempfile]) && (name = params[:file][:filename])
orig = Magick::ImageList.new(tmpfile.path)
transformed = herrschwarzify_image(orig)
filename = random_file_name("png")
transformed.write("uploads/#{filename}")
redirect "/uploads/#{filename}"
end
get "/uploads/:filename" do |filename|
send_file "uploads/#{filename}", :type => :png
end
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