feat(desktop/firefox): add synced profile support and move desktop config

modules/home/desktop/browser/firefox/default.nix

@@ -1,12 +1,30 @@
 { osConfig, lib, ... }:
+let
+  inherit (builtins) map listToAttrs;
+  inherit (lib.lists) findFirstIndex;
+  cfg = osConfig.desktop.browser.firefox;
+  profileCfg = id: {
+    inherit id;
+  };
+  profiles = listToAttrs (
+    map (name: {
+      inherit name;
+      # If there are duplicate profile names, findFirstIndex will cause issues.
+      # We sanitize the input in nixosModules.desktop to avoid this.
+      value = profileCfg (findFirstIndex (x: x == name) null cfg.syncedProfiles);
+    }) cfg.syncedProfiles
+  );
+in
 {
-  config = lib.mkIf (osConfig.desktop.browser == "firefox") {
+  config = lib.mkIf cfg.enable {
     home.persistence."/persist/home/rafiq".directories = [ ".mozilla/firefox" ];
     home.sessionVariables.BROWSER = "firefox";
     programs.firefox = {
       enable = true;
-      profiles.rafiq.id = 0;
-      profiles.test.id = 1;
+      inherit profiles;
+    };
+    stylix.targets.firefox = {
+      profileNames = cfg.syncedProfiles;
     };
   };
 }

modules/nixos/desktop/browser/default.nix

@@ -0,0 +1,25 @@
+{ lib, config, ... }:
+let
+  inherit (lib) mkEnableOption mkOption;
+  inherit (lib.types) listOf str;
+  inherit (lib.lists) allUnique;
+  cfg = config.desktop.browser;
+in
+{
+  options.desktop.browser = {
+    firefox = {
+      enable = mkEnableOption "";
+      syncedProfiles = mkOption {
+        type = listOf str;
+        default = [ ];
+      };
+    };
+  };
+
+  config.assertions = [
+    {
+      assertion = allUnique cfg.firefox.syncedProfiles;
+      message = "desktop.browser.firefox.syncedProfiles has duplicate elements.";
+    }
+  ];
+}

modules/nixos/desktop/default.nix

@@ -18,7 +18,6 @@
     };
     windowManager = lib.pantheon.mkStrOption;
     lockscreen = lib.pantheon.mkStrOption;
-    browser = lib.pantheon.mkStrOption;
     terminal = lib.pantheon.mkStrOption;
     notification-daemon = lib.pantheon.mkStrOption;
     launcher = lib.pantheon.mkStrOption;