From b9f83e6d2db2ce95e07d6b68bc78b6b3e860f76d Mon Sep 17 00:00:00 2001
From: addshore <git@addshore.com>
Date: Wed, 30 Sep 2026 07:44:10 +0100
Subject: [PATCH] Hide Modern from new skin selections

Show Modern only when the wiki already uses it as its default, so
existing wikis can retain their setting.
At some point, the skin could be entirely remove from the UI once
usage is atually gone.

Bug: T418562
---
 .../Pages/ManageWiki/Cards/Skin.vue           | 33 +++++++++++--------
 tests/unit/skin.spec.js                       | 21 ++++++++++++
 2 files changed, 40 insertions(+), 14 deletions(-)
 create mode 100644 tests/unit/skin.spec.js

diff --git a/src/components/Pages/ManageWiki/Cards/Skin.vue b/src/components/Pages/ManageWiki/Cards/Skin.vue
index 3ae3ad0e..913b71ec 100644
--- a/src/components/Pages/ManageWiki/Cards/Skin.vue
+++ b/src/components/Pages/ManageWiki/Cards/Skin.vue
@@ -38,21 +38,26 @@ export default {
     'wikiId',
   ],
   data () {
+    const skins = [
+      {
+        value: 'vector',
+        text: 'Vector',
+      },
+      {
+        value: 'timeless',
+        text: 'Timeless',
+      },
+    ]
+
+    if (this.$store.state.wikis.currentWikiSettings.wgDefaultSkin === 'modern') {
+      skins.splice(1, 0, {
+        value: 'modern',
+        text: 'Modern',
+      })
+    }
+
     return {
-      skins: [
-        {
-          value: 'vector',
-          text: 'Vector',
-        },
-        {
-          value: 'modern',
-          text: 'Modern',
-        },
-        {
-          value: 'timeless',
-          text: 'Timeless',
-        },
-      ],
+      skins,
       skinId: '',
       message: false,
     }
diff --git a/tests/unit/skin.spec.js b/tests/unit/skin.spec.js
new file mode 100644
index 00000000..ac387ccc
--- /dev/null
+++ b/tests/unit/skin.spec.js
@@ -0,0 +1,21 @@
+import Skin from '@/components/Pages/ManageWiki/Cards/Skin.vue'
+
+const getSkinValues = (defaultSkin) => Skin.data.call({
+  $store: {
+    state: {
+      wikis: {
+        currentWikiSettings: { wgDefaultSkin: defaultSkin },
+      },
+    },
+  },
+}).skins.map(skin => skin.value)
+
+describe('Skin.vue', () => {
+  it('does not offer Modern for other default skins', () => {
+    expect(getSkinValues('vector')).toEqual(['vector', 'timeless'])
+  })
+
+  it('retains Modern for wikis that already use it as their default', () => {
+    expect(getSkinValues('modern')).toEqual(['vector', 'modern', 'timeless'])
+  })
+})