chore: heygermany customer project

packages/functions/src/services/translation-service.ts

@@ -0,0 +1,225 @@
+import type { Kysely } from 'kysely'
+import type { KyselyDB } from '../database-types.js'
+import type { TranslationTokens } from '../engines/language.types.gen.js'
+import {
+  backendTranslationSnapshot,
+  type BackendTranslationNamespace,
+} from './backend-translation-snapshot.js'
+
+type LocaleData = Record<string, any>
+type Locales = Record<string, LocaleData>
+
+type BackendTranslationRow = {
+  locale: string
+  namespace: BackendTranslationNamespace
+  contentJson: unknown
+}
+
+function isPlainObject(value: unknown): value is Record<string, unknown> {
+  return Boolean(value) && typeof value === 'object' && !Array.isArray(value)
+}
+
+function parseLocaleData(value: unknown): LocaleData {
+  if (typeof value === 'string') {
+    return parseLocaleData(JSON.parse(value))
+  }
+
+  if (isPlainObject(value)) {
+    return value as LocaleData
+  }
+
+  return {}
+}
+
+function syncTranslationValue(existing: unknown, baseline: unknown): unknown {
+  if (Array.isArray(baseline)) {
+    if (!Array.isArray(existing)) {
+      return baseline
+    }
+
+    return baseline.map((item, index) => syncTranslationValue(existing[index], item))
+  }
+
+  if (isPlainObject(baseline)) {
+    const existingObject = isPlainObject(existing) ? existing : {}
+    return Object.fromEntries(
+      Object.entries(baseline).map(([key, value]) => [
+        key,
+        syncTranslationValue(existingObject[key], value),
+      ])
+    )
+  }
+
+  if (existing === undefined || existing === null) {
+    return baseline
+  }
+
+  return typeof existing === typeof baseline ? existing : baseline
+}
+
+function contentJsonString(content: unknown): string {
+  return JSON.stringify(content)
+}
+
+const mergeLocale = (...parts: LocaleData[]): LocaleData =>
+  parts.reduce((acc, part) => ({ ...acc, ...part }), {})
+
+export class TranslationService {
+  private locales: Locales = {}
+  private loaded = false
+
+  constructor(private readonly kysely: Kysely<KyselyDB>) {}
+
+  private async ensureSnapshotSynced(): Promise<void> {
+    const existingRows = await this.kysely
+      .selectFrom('backendTranslation')
+      .select(['locale', 'namespace', 'contentJson'])
+      .execute() as BackendTranslationRow[]
+
+    const existingMap = new Map<string, BackendTranslationRow>(
+      existingRows.map((row) => [`${row.locale}:${row.namespace}`, row] as const)
+    )
+    const snapshotMap = new Map<string, (typeof backendTranslationSnapshot)[number]>(
+      backendTranslationSnapshot.map((row) => [
+        `${row.locale}:${row.namespace}`,
+        row,
+      ] as const)
+    )
+
+    for (const snapshotRow of backendTranslationSnapshot) {
+      const key = `${snapshotRow.locale}:${snapshotRow.namespace}`
+      const existingRow = existingMap.get(key)
+
+      if (!existingRow) {
+        await this.kysely
+          .insertInto('backendTranslation')
+          .values({
+            locale: snapshotRow.locale,
+            namespace: snapshotRow.namespace,
+            contentJson: contentJsonString(snapshotRow.content),
+          })
+          .execute()
+        continue
+      }
+
+      const currentContent = parseLocaleData(existingRow.contentJson)
+      const syncedContent = syncTranslationValue(currentContent, snapshotRow.content)
+
+      if (contentJsonString(currentContent) === contentJsonString(syncedContent)) {
+        continue
+      }
+
+      await this.kysely
+        .updateTable('backendTranslation')
+        .set({
+          contentJson: contentJsonString(syncedContent),
+          updatedAt: new Date(),
+        })
+        .where('locale', '=', snapshotRow.locale)
+        .where('namespace', '=', snapshotRow.namespace)
+        .execute()
+    }
+
+    for (const existingRow of existingRows) {
+      const key = `${existingRow.locale}:${existingRow.namespace}`
+      if (snapshotMap.has(key)) continue
+
+      await this.kysely
+        .deleteFrom('backendTranslation')
+        .where('locale', '=', existingRow.locale)
+        .where('namespace', '=', existingRow.namespace)
+        .execute()
+    }
+  }
+
+  async init(): Promise<void> {
+    if (this.loaded) return
+
+    await this.ensureSnapshotSynced()
+
+    const rows = await this.kysely
+      .selectFrom('backendTranslation')
+      .select(['locale', 'contentJson'])
+      .orderBy('locale')
+      .orderBy('namespace')
+      .execute() as Array<Pick<BackendTranslationRow, 'locale' | 'contentJson'>>
+
+    const locales: Locales = {}
+    for (const row of rows) {
+      locales[row.locale] = mergeLocale(
+        locales[row.locale] ?? {},
+        parseLocaleData(row.contentJson)
+      )
+    }
+
+    this.locales = locales
+    this.loaded = true
+  }
+
+  get(locale: string): LocaleData {
+    if (!this.loaded) {
+      throw new Error('TranslationService not loaded. Call init() first.')
+    }
+
+    if (!this.locales[locale]) {
+      console.warn(`Missing locale: ${locale}`)
+    }
+
+    return this.locales[locale] || this.locales.en || {}
+  }
+
+  getAll(): Locales {
+    if (!this.loaded) {
+      throw new Error('TranslationService not loaded. Call init() first.')
+    }
+
+    return this.locales
+  }
+
+  t(
+    path: TranslationTokens,
+    locale: string,
+    variables: Record<string, any> = {}
+  ): string {
+    const localeData = this.get(locale)
+    const keys = path.split('.')
+    let value: any = localeData
+
+    for (const key of keys) {
+      if (value && typeof value === 'object' && key in value) {
+        value = value[key]
+      } else {
+        return `[Missing: ${path}]`
+      }
+    }
+
+    if (typeof value !== 'string') {
+      return `[Invalid: ${path}]`
+    }
+
+    return value.replace(/\{\{(\w+)\}\}|\{(\w+)\}/g, (_, keyA, keyB) => {
+      const key = keyA ?? keyB
+      return variables[key] || `{${key}}`
+    })
+  }
+
+  tArray(path: string, locale: string = 'en'): string[] {
+    const localeData = this.get(locale)
+    const keys = path.split('.')
+    let value: any = localeData
+
+    for (const key of keys) {
+      if (value && typeof value === 'object' && key in value) {
+        value = value[key]
+      } else {
+        return [`[Missing: ${path}]`]
+      }
+    }
+
+    if (!Array.isArray(value)) {
+      return [`[Invalid array: ${path}]`]
+    }
+
+    return value
+  }
+}