63 lines
1.3 KiB
Elixir
63 lines
1.3 KiB
Elixir
defmodule LabelmakerWeb.LabelController do
|
|
use LabelmakerWeb, :controller
|
|
alias LabelmakerWeb.Constants
|
|
alias LabelmakerWeb.Tools
|
|
|
|
@label_dir Path.join(:code.priv_dir(:labelmaker), "static/labels")
|
|
|
|
def show(conn, params) do
|
|
options = Tools.process_parameters(params)
|
|
|
|
filename =
|
|
options
|
|
|> inspect()
|
|
|> (fn str -> :crypto.hash(:sha256, str) end).()
|
|
|> Base.encode16(case: :lower)
|
|
|
|
filename = filename <> ".png"
|
|
filepath = Path.join(@label_dir, filename)
|
|
|
|
unless File.exists?(filepath) do
|
|
generate_image(options, filepath)
|
|
end
|
|
|
|
conn
|
|
|> put_resp_content_type("image/png")
|
|
|> send_file(200, filepath)
|
|
end
|
|
|
|
defp generate_image(options, filepath) do
|
|
File.mkdir_p!(@label_dir)
|
|
|
|
args = [
|
|
"-background",
|
|
"none",
|
|
"-fill",
|
|
options.color,
|
|
"-pointsize",
|
|
options.size,
|
|
"-font",
|
|
options.font,
|
|
"label:#{String.slice(options.label, 0, Constants.max_label_length())}",
|
|
"-set",
|
|
"comment",
|
|
inspect(Jason.encode!(Map.drop(options, [:link]))),
|
|
filepath
|
|
]
|
|
|
|
args =
|
|
if options.outline != "none" do
|
|
[
|
|
"-stroke",
|
|
options.outline,
|
|
"-strokewidth",
|
|
"1"
|
|
] ++ args
|
|
else
|
|
args
|
|
end
|
|
|
|
{_, 0} = System.cmd("magick", args)
|
|
end
|
|
end
|