defmodule MatrixServer do def get_mxid(localpart) when is_binary(localpart) do "@#{localpart}:#{server_name()}" end def server_name do Application.get_env(:matrix_server, :server_name) end def maybe_update_map(map, old_key, new_key) do maybe_update_map(map, old_key, new_key, &Function.identity/1) end def maybe_update_map(map, old_key, new_key, fun) when is_map_key(map, old_key) do value = Map.fetch!(map, old_key) map |> Map.put(new_key, fun.(value)) |> Map.delete(old_key) end def maybe_update_map(map, _, _, _), do: map def localpart_regex, do: ~r/^([a-z0-9\._=\/])+$/ @alphabet Enum.into(?a..?z, []) ++ Enum.into(?A..?Z, []) def random_string(length), do: random_string(length, @alphabet) def random_string(length, alphabet) when length >= 1 do for _ <- 1..length, into: "", do: <> end def default_room_version, do: "7" def get_domain(id) do case String.split(id, ":") do [_, server_name] -> server_name _ -> nil end end # https://elixirforum.com/t/22709/9 def has_duplicates?(list) do list |> Enum.reduce_while(%MapSet{}, fn x, acc -> if MapSet.member?(acc, x), do: {:halt, false}, else: {:cont, MapSet.put(acc, x)} end) |> is_boolean() end # https://matrix.org/docs/spec/appendices#unpadded-base64 def encode_unpadded_base64(data) do data |> Base.encode64() |> String.trim_trailing("=") end end