37 lines
1.8 KiB
Nix
37 lines
1.8 KiB
Nix
{lib, ...}: let
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inherit (builtins) isString typeOf match toString head;
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inherit (lib) throwIfNot concatStringsSep splitStringBy toLower map concatMapAttrsStringSep;
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in {
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localLib.strings = {
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#========================================================================================
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# Converts a string to snake case
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#
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# simply replaces any uppercase letter to its lowercase variant preceeded by an underscore
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#========================================================================================
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toSnakeCase =
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str:
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throwIfNot (isString str) "toSnakeCase only accepts string values, but got ${typeOf str}" (
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str
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|> splitStringBy (prev: curr: builtins.match "[a-z]" prev != null && builtins.match "[A-Z]" curr != null) true
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|> map (p: toLower p)
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|> concatStringsSep "_"
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);
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#========================================================================================
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# Converts a set of url parts to a string
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#========================================================================================
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toUrl =
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{ protocol ? null, host, port ? null, path ? null, query ? null, hash ? null }:
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let
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trim_slashes = str: str |> match "^\/*(.+?)\/*$" |> head;
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encode_to_str = set: concatMapAttrsStringSep "&" (n: v: "${n}=${v}") set;
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_protocol = if protocol != null then "${protocol}://" else "";
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_port = if port != null then ":${toString port}" else "";
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_path = if path != null then "/${path |> trim_slashes}" else "";
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_query = if query != null then "?${query |> encode_to_str}" else "";
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_hash = if hash != null then "#${hash |> encode_to_str}" else "";
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in
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"${_protocol}${host}${_port}${_path}${_query}${_hash}";
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};
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}
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