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35 lines
964 B
Elixir
35 lines
964 B
Elixir
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defmodule PhilomenaWeb.Page.HistoryController do
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use PhilomenaWeb, :controller
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alias Philomena.StaticPages.StaticPage
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alias Philomena.StaticPages.Version
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alias Philomena.Repo
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import Ecto.Query
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plug :load_resource, model: StaticPage, id_field: "slug", persisted: true
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def index(conn, _params) do
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page = conn.assigns.static_page
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versions =
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Version
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|> where(static_page_id: ^page.id)
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|> preload(:user)
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|> order_by(desc: :created_at)
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|> Repo.all()
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|> generate_differences(page.body)
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render(conn, "index.html", layout_class: "layout--wide", versions: versions)
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end
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defp generate_differences(pages, current_body) do
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Enum.map_reduce(pages, current_body, fn page, previous_body ->
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difference = List.myers_difference(split(previous_body), split(page.body))
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%{page | difference: difference}
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end)
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end
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defp split(nil), do: ""
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defp split(body), do: String.split(body, "\n")
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end
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