lowdb storage service

src/services/lowdbStorage.service.ts

@@ -0,0 +1,39 @@
+import * as lowdb from 'lowdb';
+import * as FileSync from 'lowdb/adapters/FileSync';
+
+import { StorageService } from 'jslib/abstractions/storage.service';
+import { Utils } from 'jslib/misc/utils';
+
+export class LowdbStorageService implements StorageService {
+    private db: lowdb.LowdbSync<any>;
+
+    constructor(appDirName: string) {
+        let path = null;
+        if (process.platform === 'darwin') {
+            path = process.env.HOME + 'Library/Application Support';
+        } else if (process.platform === 'win32') {
+            path = process.env.APPDATA;
+        } else {
+            path = process.env.HOME + '.config';
+        }
+        path += ('/' + appDirName + '/data.json');
+
+        const adapter = new FileSync(path);
+        this.db = lowdb(adapter);
+    }
+
+    get<T>(key: string): Promise<T> {
+        const val = this.db.get(key).value();
+        return Promise.resolve(val as T);
+    }
+
+    save(key: string, obj: any): Promise<any> {
+        this.db.set(key, obj).write();
+        return Promise.resolve();
+    }
+
+    remove(key: string): Promise<any> {
+        this.db.unset(key).write();
+        return Promise.resolve();
+    }
+}