68 lines
1.3 KiB
Elixir
68 lines
1.3 KiB
Elixir
defmodule LabelmakerWeb.Label do
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use LabelmakerWeb, :live_view
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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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@defaults %{
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"label" => "Labelmaker",
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"font" => "Helvetica",
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"color" => "black",
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"size" => "24"
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}
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@permitted_keys Map.keys(@defaults)
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def mount(params, _session, socket) do
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options =
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@defaults
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|> Map.merge(params)
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|> Map.take(@permitted_keys)
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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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{:ok,
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assign(socket,
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label: options["label"],
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image_path: ~p"/labels/#{filename}"
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)}
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end
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def render(assigns) do
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~H"""
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<div>
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<h1>Label: {@label}</h1>
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<img src={@image_path} alt="" />
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</div>
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"""
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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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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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