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52 lines
1.4 KiB
Elixir
52 lines
1.4 KiB
Elixir
defmodule PhilomenaWeb.PaginationPlug do
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import Plug.Conn
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alias Pow.Plug
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# No options
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def init([]), do: []
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# Assign pagination info
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def call(conn, _opts) do
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conn = conn |> fetch_query_params()
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user = conn |> Plug.current_user()
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params = conn.params
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page_size = get_page_size(params)
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page_number = get_page_number(params)
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image_page_size = page_size || image_page_size(user)
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comment_page_size = page_size || comment_page_size(user)
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conn
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|> assign(:pagination, %{page_number: page_number, page_size: page_size || 25})
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|> assign(:image_pagination, %{page_number: page_number, page_size: image_page_size})
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|> assign(:scrivener, [page: page_number, page_size: page_size || 25])
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|> assign(:comment_scrivener, [page: page_number, page_size: comment_page_size])
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end
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defp get_page_number(%{"page" => page}) do
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to_integer(page) || 1
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end
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defp get_page_number(_params), do: 1
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defp get_page_size(%{"per_page" => per_page}) do
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per_page
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|> to_integer()
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|> Kernel.||(25)
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|> max(1)
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|> min(50)
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end
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defp get_page_size(_params), do: nil
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defp to_integer(string) do
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case Integer.parse(string) do
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{int, _rest} -> int
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_ -> nil
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end
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end
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defp image_page_size(%{images_per_page: x}), do: x
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defp image_page_size(_user), do: 15
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defp comment_page_size(%{comments_per_page: x}), do: x
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defp comment_page_size(_user), do: 25
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end
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