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86 lines
2.4 KiB
Elixir
86 lines
2.4 KiB
Elixir
defmodule PhilomenaWeb.ImageNavigator do
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alias PhilomenaWeb.ImageSorter
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alias Philomena.Images.Image
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alias PhilomenaQuery.Search
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@order_for_dir %{
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"next" => %{"asc" => "asc", "desc" => "desc"},
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"prev" => %{"asc" => "desc", "desc" => "asc"}
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}
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def find_consecutive(conn, image, compiled_query, compiled_filter) do
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conn = update_in(conn.params, &Map.put_new(&1, "sf", "id"))
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%{query: compiled_query, sorts: sorts} = ImageSorter.parse_sort(conn.params, compiled_query)
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sorts =
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sorts
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|> Enum.flat_map(&Enum.to_list/1)
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|> Enum.map(&apply_direction(&1, conn.params["rel"]))
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search_after =
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conn.params["sort"]
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|> permit_list()
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|> Enum.flat_map(&permit_value/1)
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|> default_value(image.id)
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maybe_search_after(
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Image,
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%{
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query: %{
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bool: %{
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must: compiled_query,
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must_not: [
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compiled_filter,
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%{term: %{hidden_from_users: true}},
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%{term: %{id: image.id}},
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hidden_filter(conn.assigns.current_user, conn.params["hidden"])
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]
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}
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},
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sort: sorts,
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search_after: search_after
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},
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%{page_size: 1},
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Image,
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length(sorts) == length(search_after)
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)
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|> Enum.to_list()
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|> case do
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[] -> nil
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[next_image] -> next_image
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end
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end
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defp maybe_search_after(module, body, options, queryable, true) do
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module
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|> Search.search_definition(body, options)
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|> Search.search_records_with_hits(queryable)
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end
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defp maybe_search_after(_module, _body, _options, _queryable, _false) do
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[]
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end
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defp apply_direction({"galleries.position", sort_body}, rel) do
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sort_body = update_in(sort_body.order, fn direction -> @order_for_dir[rel][direction] end)
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%{"galleries.position" => sort_body}
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end
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defp apply_direction({field, direction}, rel) do
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%{field => @order_for_dir[rel][direction]}
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end
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defp permit_list(value) when is_list(value), do: value
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defp permit_list(_value), do: []
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defp permit_value(value) when is_binary(value) or is_number(value), do: [value]
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defp permit_value(_value), do: []
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defp default_value([], term), do: [term]
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defp default_value(list, _term), do: list
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defp hidden_filter(%{id: id}, param) when param != "1", do: %{term: %{hidden_by_user_ids: id}}
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defp hidden_filter(_user, _param), do: %{match_none: %{}}
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end
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