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