refactor(modules/legacy/firefox): Move to by-name

This also improves the arkanfox-integration and the profile id
generation.

1 files changed, 29 insertions, 1 deletions

diff --git a/lib/default.nix b/lib/default.nix
index 80227cf4..f18e4b33 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -26,6 +26,34 @@
     (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
 
   Raises the `base` to the power of `power`.
@@ -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;
 }