Alex Mickelson
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38 lines
1.1 KiB
Elixir
38 lines
1.1 KiB
Elixir
defmodule CobblemonUiWeb.Plugs.SpriteStatic do
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@moduledoc """
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Serves cached Pokémon sprite images from the sprites cache directory.
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Matches requests to `/sprites/<name>.png` and serves the corresponding
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file from `CobblemonUi.SpriteCache.sprites_dir()`. If the file doesn't
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exist locally, triggers an on-demand download before responding.
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"""
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import Plug.Conn
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def init(opts), do: opts
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def call(%Plug.Conn{request_path: "/sprites/" <> filename} = conn, _opts) do
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if String.ends_with?(filename, ".png") do
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species = String.trim_trailing(filename, ".png")
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CobblemonUi.SpriteCache.ensure_sprite(species)
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path = CobblemonUi.SpriteCache.sprite_path(species)
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if File.exists?(path) do
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conn
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|> put_resp_content_type("image/png")
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|> put_resp_header("cache-control", "public, max-age=604800, immutable")
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|> send_file(200, path)
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|> halt()
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else
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conn
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|> send_resp(404, "Not found")
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|> halt()
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end
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else
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conn
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end
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end
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def call(conn, _opts), do: conn
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end
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