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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Helpers.UriHelper do
   6   def modify_uri_params(uri, overridden_params, deleted_params \\ []) do
   7     uri = URI.parse(uri)
   8
   9     existing_params = URI.query_decoder(uri.query || "") |> Map.new()
  10     overridden_params = Map.new(overridden_params, fn {k, v} -> {to_string(k), v} end)
  11     deleted_params = Enum.map(deleted_params, &to_string/1)
  12
  13     updated_params =
  14       existing_params
  15       |> Map.merge(overridden_params)
  16       |> Map.drop(deleted_params)
  17
  18     uri
  19     |> Map.put(:query, URI.encode_query(updated_params))
  20     |> URI.to_string()
  21     |> String.replace_suffix("?", "")
  22   end
  23
  24   def maybe_add_base("/" <> uri, base), do: Path.join([base, uri])
  25   def maybe_add_base(uri, _base), do: uri
  26 end