40 lines
1.1 KiB
Elixir
40 lines
1.1 KiB
Elixir
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defmodule SimpleshopThemeWeb.Plugs.LoadTheme do
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@moduledoc """
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Plug that loads theme settings and generated CSS for public shop pages.
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This plug:
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1. Checks the ETS cache for pre-generated CSS
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2. Falls back to generating CSS from theme settings on cache miss
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3. Assigns both `theme_settings` and `generated_css` to the connection
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The generated CSS contains only the active theme values (not all variants),
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making it much smaller than the full theme-layer2-attributes.css file used
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by the theme editor for live preview switching.
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"""
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import Plug.Conn
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alias SimpleshopTheme.Settings
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alias SimpleshopTheme.Theme.{CSSGenerator, CSSCache}
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def init(opts), do: opts
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def call(conn, _opts) do
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{theme_settings, generated_css} =
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case CSSCache.get() do
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{:ok, css} ->
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{Settings.get_theme_settings(), css}
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:miss ->
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settings = Settings.get_theme_settings()
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css = CSSGenerator.generate(settings)
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CSSCache.put(css)
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{settings, css}
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end
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conn
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|> assign(:theme_settings, theme_settings)
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|> assign(:generated_css, generated_css)
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end
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end
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