+
+ def add_link_headers(
+ conn,
+ method,
+ activities,
+ param \\ nil,
+ params \\ %{},
+ func3 \\ nil,
+ func4 \\ nil
+ ) do
+ params =
+ conn.params
+ |> Map.drop(["since_id", "max_id", "min_id"])
+ |> Map.merge(params)
+
+ last = List.last(activities)
+
+ func3 = func3 || (&mastodon_api_url/3)
+ func4 = func4 || (&mastodon_api_url/4)
+
+ if last do
+ max_id = last.id
+
+ limit =
+ params
+ |> Map.get("limit", "20")
+ |> String.to_integer()
+
+ min_id =
+ if length(activities) <= limit do
+ activities
+ |> List.first()
+ |> Map.get(:id)
+ else
+ activities
+ |> Enum.at(limit * -1)
+ |> Map.get(:id)
+ end
+
+ {next_url, prev_url} =
+ if param do
+ {
+ func4.(
+ Pleroma.Web.Endpoint,
+ method,
+ param,
+ Map.merge(params, %{max_id: max_id})
+ ),
+ func4.(
+ Pleroma.Web.Endpoint,
+ method,
+ param,
+ Map.merge(params, %{min_id: min_id})
+ )
+ }
+ else
+ {
+ func3.(
+ Pleroma.Web.Endpoint,
+ method,
+ Map.merge(params, %{max_id: max_id})
+ ),
+ func3.(
+ Pleroma.Web.Endpoint,
+ method,
+ Map.merge(params, %{min_id: min_id})
+ )
+ }
+ end
+
+ conn
+ |> put_resp_header("link", "<#{next_url}>; rel=\"next\", <#{prev_url}>; rel=\"prev\"")
+ else
+ conn
+ end
+ end