feat(storage-manager): add storage manager library

frontend/src/lib/storage-manager/storage-manager.js

@@ -0,0 +1,62 @@
+const LIFETIME = {
+  INFINITE: 'infinite',
+};
+
+export class StorageManager {
+
+  namespace;
+
+  constructor(namespace) {
+    if (!namespace) {
+      throw new Error('Cannot setup StorageManager without namespace');
+    }
+    
+    this.namespace = namespace;
+  }
+
+  toNamespace(key) {
+    return this.namespace + '--' + key;
+  }
+
+  save(key, value, options) {
+    if (!key) {
+      throw new Error('StorageManager.save called with invalid key');
+    }
+
+    if (options && options.lifetime !== undefined && !Object.values(LIFETIME).includes(options.lifetime)) {
+      throw new Error('StorageManager.save called with unsupported lifetime option');
+    }
+
+    const lifetime = options && options.lifetime !== undefined ? options.lifetime : LIFETIME.INFINITE;
+
+    switch (lifetime) {
+      case LIFETIME.INFINITE:
+        localStorage.setItem(this.toNamespace(key), JSON.stringify(value));
+        break;
+      default:
+        console.error('StorageManager.save cannot save item with unsupported lifetime');
+    }
+  }
+
+  load(key, options) {
+    if (options && options.lifetime !== undefined && !Object.values(LIFETIME).includes(options.lifetime)) {
+      throw new Error('StorageManager.load called with unsupported lifetime option');
+    }
+
+    const lifetime = options && options.lifetime !== undefined ? options.lifetime : LIFETIME.INFINITE;
+
+    switch (lifetime) {
+      case LIFETIME.INFINITE: {
+        const value = JSON.parse(localStorage.getItem(this.toNamespace(key)));
+        if (value === null) {
+          // remove item from localStorage if it stores an invalid value (cannot be parsed)
+          localStorage.removeItem(this.toNamespace(key));
+        }
+        return value;
+      }
+      default:
+        console.error('StorageManager.load cannot load item with unsupported lifetime');
+    }
+  }
+
+}