From 39e11eac71d7e2788ebb0137ffb2cee887eb0160 Mon Sep 17 00:00:00 2001
From: Gabriel Arazas <foo.dogsquared@gmail.com>
Date: Mon, 12 Sep 2022 18:51:09 +0800
Subject: [PATCH] profiles/i18n: modularize common config into separate options

---
 modules/nixos/profiles/i18n.nix               | 119 ++++++++++++------
 .../nixos/workflows/a-happy-gnome/default.nix |  15 +--
 2 files changed, 86 insertions(+), 48 deletions(-)

diff --git a/modules/nixos/profiles/i18n.nix b/modules/nixos/profiles/i18n.nix
index d2c1b298..a925801c 100644
--- a/modules/nixos/profiles/i18n.nix
+++ b/modules/nixos/profiles/i18n.nix
@@ -3,41 +3,88 @@
 
 let
   cfg = config.profiles.i18n;
-in {
-  options.profiles.i18n.enable = lib.mkEnableOption "i18n-related options";
-
-  config = lib.mkIf cfg.enable {
-    # I don't speak all of the listed languages. It's just nice to have some
-    # additional language packs for it. ;p
-    i18n.supportedLocales = [
-      "en_US.UTF-8/UTF-8"
-      "ja_JP.UTF-8/UTF-8"
-      "ko_KR.UTF-8/UTF-8"
-      "zh_CN.UTF-8/UTF-8"
-      "zh_HK.UTF-8/UTF-8"
-      "zh_SG.UTF-8/UTF-8"
-      "tl_PH.UTF-8/UTF-8"
-      "fr_FR.UTF-8/UTF-8"
-      "it_IT.UTF-8/UTF-8"
-    ];
-
-    environment.systemPackages = with pkgs; [
-      goldendict
-    ];
-
-    # The most minimal set of packages for most locales.
-    fonts.fonts = with pkgs; [
-      noto-fonts
-      noto-fonts-cjk
-      noto-fonts-cjk-sans
-      noto-fonts-cjk-serif
-
-      source-code-pro
-      source-sans-pro
-      source-han-sans
-      source-serif-pro
-      source-han-serif
-      source-han-mono
-    ];
+in
+{
+  options.profiles.i18n = {
+    enable = lib.mkEnableOption "i18n-related options";
+    ibus.enable = lib.mkEnableOption "i18n config with ibus";
+    fcitx5.enable = lib.mkEnableOption "i18n config with fcitx5";
   };
+
+  config = lib.mkIf cfg.enable (lib.mkMerge [
+    {
+      assertions = let enabledi18nConfigs = lib.countAttrs (_: setup: lib.isAttrs setup && setup.enable) cfg; in
+        [{
+          assertion = enabledi18nConfigs < 1;
+          message = ''
+            Only one i18n setup should be enabled at any given time.
+          '';
+        }];
+
+      # I don't speak all of the listed languages. It's just nice to have some
+      # additional language packs for it. ;p
+      i18n.supportedLocales = lib.mkBefore [
+        "en_US.UTF-8/UTF-8"
+        "ja_JP.UTF-8/UTF-8"
+        "ko_KR.UTF-8/UTF-8"
+        "zh_CN.UTF-8/UTF-8"
+        "zh_HK.UTF-8/UTF-8"
+        "zh_SG.UTF-8/UTF-8"
+        "tl_PH.UTF-8/UTF-8"
+        "fr_FR.UTF-8/UTF-8"
+        "it_IT.UTF-8/UTF-8"
+      ];
+
+      environment.systemPackages = with pkgs; [
+        goldendict
+      ];
+
+      # The most minimal set of packages for most locales.
+      fonts.fonts = with pkgs; [
+        noto-fonts
+        noto-fonts-cjk
+        noto-fonts-cjk-sans
+        noto-fonts-cjk-serif
+
+        source-code-pro
+        source-sans-pro
+        source-han-sans
+        source-serif-pro
+        source-han-serif
+        source-han-mono
+      ];
+    }
+
+    (lib.mkIf cfg.ibus.enable {
+      i18n.inputMethod = {
+        enabled = "ibus";
+        ibus.engines = with pkgs.ibus-engines; [
+          mozc
+          rime
+          hangul
+          table
+          table-others
+          typing-booster
+          uniemoji
+        ];
+      };
+    })
+
+    (lib.mkIf cfg.fcitx5.enable {
+      i18n.inputMethod = {
+        enabled = "fcitx5";
+        fcitx5 = {
+          enableRimeData = true;
+          addons = with pkgs; [
+            fcitx5-lua
+            fcitx5-mozc
+            fcitx5-rime
+            fcitx5-table-extra
+            fcitx5-table-other
+            fcitx5-unikey
+          ];
+        };
+      };
+    })
+  ]);
 }
diff --git a/modules/nixos/workflows/a-happy-gnome/default.nix b/modules/nixos/workflows/a-happy-gnome/default.nix
index 047f2808..32fe1e47 100644
--- a/modules/nixos/workflows/a-happy-gnome/default.nix
+++ b/modules/nixos/workflows/a-happy-gnome/default.nix
@@ -110,18 +110,9 @@ in
     };
 
     services.packagekit.enable = false;
-
-    i18n.inputMethod = {
-      enabled = "ibus";
-      ibus.engines = with pkgs.ibus-engines; [
-        mozc
-        rime
-        hangul
-        table
-        table-others
-        typing-booster
-        uniemoji
-      ];
+    profiles.i18n = {
+      enable = true;
+      ibus.enable = true;
     };
 
     # Since we're using KDE Connect, we'll have to use gsconnect.