1 files changed, 75 insertions, 0 deletions

diff --git a/packages/renderer/src/i18n/RendererIpcI18nBackend.ts b/packages/renderer/src/i18n/RendererIpcI18nBackend.ts
new file mode 100644
index 0000000..13e03b5
--- /dev/null
+++ b/packages/renderer/src/i18n/RendererIpcI18nBackend.ts
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C)  2022 Kristóf Marussy <kristof@marussy.com>
+ *
+ * This file is part of Sophie.
+ *
+ * Sophie is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { SophieRenderer } from '@sophie/shared';
+import type { BackendModule, ReadCallback } from 'i18next';
+
+export default class RendererIpcI18nBackend implements BackendModule<unknown> {
+  type = 'backend' as const;
+
+  constructor(
+    private readonly ipc: SophieRenderer,
+    private readonly devMode = false,
+  ) {}
+
+  // eslint-disable-next-line class-methods-use-this -- Method required by interface.
+  init() {}
+
+  read(language: string, namespace: string, callback: ReadCallback): void {
+    const readAsync = async () => {
+      const translations = await this.ipc.getTranslation({
+        language,
+        namespace,
+      });
+      // eslint-disable-next-line unicorn/no-null -- `i18next` API requires `null`.
+      setTimeout(() => callback(null, translations), 0);
+    };
+
+    readAsync().catch((error) => {
+      const callbackError =
+        error instanceof Error
+          ? error
+          : new Error(`Unknown error: ${JSON.stringify(error)}`);
+      /*
+        eslint-disable-next-line promise/no-callback-in-promise, unicorn/no-null --
+        Converting from promise based API to a callback. `i18next` API requires `null`.
+      */
+      setTimeout(() => callback(callbackError, null), 0);
+    });
+  }
+
+  create(
+    languages: string[],
+    namespace: string,
+    key: string,
+    fallbackValue: string,
+  ): void {
+    if (!this.devMode) {
+      throw new Error('Refusing to add missing translation in production mode');
+    }
+    this.ipc.dispatchAction({
+      action: 'add-missing-translation',
+      languages,
+      namespace,
+      key,
+      value: fallbackValue,
+    });
+  }
+}