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35 lines
1 KiB
Elixir
35 lines
1 KiB
Elixir
defmodule PhilomenaWeb.LoadTopicPlug do
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alias Philomena.Topics.Topic
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alias Philomena.Repo
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import Plug.Conn, only: [assign: 3]
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import Canada.Can, only: [can?: 3]
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import Ecto.Query
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def init(opts),
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do: opts
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def call(%{assigns: %{forum: forum}} = conn, opts) do
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param = Keyword.get(opts, :param, "topic_id")
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show_hidden = Keyword.get(opts, :show_hidden, false)
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Topic
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|> where(forum_id: ^forum.id, slug: ^to_string(conn.params[param]))
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|> preload([:user, :forum, :deleted_by, poll: :options])
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|> Repo.one()
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|> maybe_hide_topic(conn, show_hidden)
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end
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defp maybe_hide_topic(nil, conn, _show_hidden),
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do: PhilomenaWeb.NotFoundPlug.call(conn)
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defp maybe_hide_topic(%{hidden_from_users: false} = topic, conn, _show_hidden),
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do: assign(conn, :topic, topic)
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defp maybe_hide_topic(topic, %{assigns: %{current_user: user}} = conn, show_hidden) do
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case show_hidden or can?(user, :show, topic) do
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true -> assign(conn, :topic, topic)
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false -> PhilomenaWeb.NotAuthorizedPlug.call(conn)
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end
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end
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end
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