add storage api

packages/core/sync/storage.js

@@ -0,0 +1,22 @@
+import Convert from "../utils/convert";
+
+class Storage {
+  constructor(context) {
+    this.storage = context;
+  }
+  async write(key, data) {
+    await this.storage.write(key, Convert.toString(data));
+  }
+  async read(key) {
+    let data = await this.storage.read(key);
+    return Convert.fromString(data);
+  }
+  clear() {
+    this.storage.clear();
+  }
+  remove(key) {
+    this.storage.remove(key);
+  }
+}
+
+export default Storage;

packages/core/utils/convert.js

@@ -0,0 +1,26 @@
+export default class Convert {
+  static toString(input) {
+    try {
+      let type = typeof input;
+      if (type === "object") return JSON.stringify(input);
+      return input.toString();
+    } catch (error) {
+      return input.toString();
+    }
+  }
+  static fromString(input) {
+    try {
+      let firstChar = input[0];
+      if (firstChar === "[" || firstChar === "{") return JSON.parse(input);
+      if (parseInt(input) !== NaN) return parseInt(input);
+      if (parseFloat(input) !== NaN) return parseFloat(input);
+      if (parseBoolean(input) !== undefined) return parseBoolean(input);
+      return input;
+    } catch (error) {
+      return input;
+    }
+  }
+}
+function parseBoolean(value) {
+  return value === "true" ? true : value === "false" ? false : undefined;
+}