Migrate Site to German as Default Locale

src/pages/[...slug].astro

@@ -1,5 +1,5 @@
 ---
-import {getCollection} from "astro:content";
+import {CollectionEntry, getCollection} from "astro:content";
 import {astroI18n, createGetStaticPaths} from "astro-i18n";
 import PageLayout from "../layouts/PageLayout.astro";
 import LanguageWarning from "../components/LanguageWarning.astro";
@@ -8,31 +8,46 @@ import "@styles/table.css";
 export const getStaticPaths = createGetStaticPaths(async () => {
     let posts = await getCollection("pages", value => value.id.split("/")[0] === astroI18n.locale);
 
-    function fixLink(slug: string): string {
-        if (astroI18n.locales.includes(slug.split("/")[0])) {
-            return slug.split("/").slice(1).join("/");
+    const germanPosts = await getCollection("pages", entry => entry.id.split("/")[0] === astroI18n.fallbackLocale);
+
+    germanPosts.forEach(value => {
+        if (posts.find(post => post.id.split("/")[1] === value.id.split("/")[1])) {
+            return;
         } else {
-            return slug;
+            posts.push(value);
+        }
+    });
+
+    function fixLink(page: CollectionEntry<"pages">): string {
+        if (astroI18n.locale != astroI18n.primaryLocale && Object.keys(page.data.slugs ?? {}).includes(astroI18n.locale)) {
+            return page.data.slugs[astroI18n.locale];
+        }
+
+        if (astroI18n.locales.includes(page.slug.split("/")[0])) {
+            return page.slug.split("/").slice(1).join("/");
+        } else {
+            return page.slug;
         }
     }
 
     return posts.map((page) => ({
         props: {
             page,
+            german: page.id.split("/")[0] === astroI18n.fallbackLocale,
         },
         params: {
-            slug: fixLink(page.slug),
+            slug: fixLink(page),
         },
     }));
 });
 
-const {page} = Astro.props;
+const {page, german} = Astro.props;
 const {Content} = await page.render();
 ---
 
 <PageLayout title={page.data.title}>
     <article>
-        {page.data.german && (
+        {german && (
             <LanguageWarning/>
         )}
         <h1 class="text-left">{page.data.title}</h1>