From 4d04e90f0941350957afe7ffe17e99fe27eca2b9 Mon Sep 17 00:00:00 2001
From: Benedikt Peetz <benedikt.peetz@b-peetz.de>
Date: Wed, 2 Apr 2025 18:13:25 +0200
Subject: refactor(modules/legacy/firefox): Move to by-name

This also improves the arkanfox-integration and the profile id
generation.
---
 lib/default.nix | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

(limited to 'lib/default.nix')

diff --git a/lib/default.nix b/lib/default.nix
index 80227cf4..f18e4b33 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -25,6 +25,34 @@
     builtins.foldl' (acc: num: acc + num) 0
     (lib.lists.imap0 (index: elem: elem * (pow 2 index)) binaryList);
 
+  /*
+  Converts `string` to a (probably) unique numerical id.
+
+  This is achieved by hashing the string and returning the first six hex-digits
+  converted to a base 10 number.
+
+  # Type
+
+  idFromString :: String -> Int
+
+  # Arguments
+
+  string
+  : The string to use as seed for the id generation.
+
+  # Examples
+
+  idFromString "3d-printer"
+  => 10365713
+  */
+  idFromString = string: let
+    inputSeed =
+      builtins.concatStringsSep ""
+      (lib.lists.take 6
+        (lib.strings.stringToCharacters (builtins.hashString "sha256" string)));
+  in
+    lib.trivial.fromHexString inputSeed;
+
   /*
   source: https://github.com/NixOS/nix/issues/10387#issuecomment-2494597690
 
@@ -65,5 +93,5 @@
     then (base * (pow base (power - 1)))
     else builtins.throw "Negative powers are not supported";
 in {
-  inherit binaryToDecimal pow;
+  inherit binaryToDecimal idFromString pow;
 }
-- 
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