chore: add a script to cleanup old translations (#1963)

scripts/cleanup-translations.ts

@@ -0,0 +1,65 @@
+import flatten from 'flat'
+import { createResolver } from '@nuxt/kit'
+import fs from 'fs-extra'
+import { currentLocales } from '../config/i18n'
+
+const resolver = createResolver(import.meta.url)
+
+const sourceLanguageLocale = currentLocales.find(l => l.code === 'en-US')!
+
+function merge(src: Record<string, any>, dst: Record<string, any>) {
+  for (const key in src) {
+    if (typeof src[key] === 'object') {
+      if (!dst[key])
+        dst[key] = {}
+
+      merge(src[key], dst[key])
+    }
+    else {
+      dst[key] = src[key]
+    }
+  }
+}
+
+const sourceFiles: string[] = sourceLanguageLocale.files ? sourceLanguageLocale.files : [sourceLanguageLocale.file!]
+
+const sourceTranslations: Record<string, string> = {}
+
+for (const file of sourceFiles) {
+  const data = JSON.parse(Buffer.from(
+    await fs.readFile(resolver.resolve(`../locales/${file}`), 'utf-8'),
+  ).toString()) as Record<string, unknown>
+
+  merge(flatten(data), sourceTranslations)
+}
+
+async function removeOutdatedTranslations() {
+  for (const locale of currentLocales.filter(l => l.code !== 'en-US')) {
+    const files: string[] = locale.files ? locale.files : [locale.file!]
+
+    for (const file of files) {
+      const path = resolver.resolve(`../locales/${file}`)
+
+      const data = JSON.parse(Buffer.from(
+        await fs.readFile(path, 'utf-8'),
+      ).toString())
+
+      const targetTranslations: Record<string, string> = flatten(data)
+
+      for (const key in targetTranslations) {
+        if (!sourceTranslations[key])
+          delete targetTranslations[key]
+      }
+
+      const unflattened = flatten.unflatten(targetTranslations)
+
+      await fs.writeFile(
+        path,
+        `${JSON.stringify(unflattened, null, 2)}\n`,
+        { encoding: 'utf-8' },
+      )
+    }
+  }
+}
+
+removeOutdatedTranslations()