init

lib/Storage.js

@@ -0,0 +1,39 @@
+
+
+class JsStorage {
+  constructor() {
+    this.db = {}
+  }
+
+  get(key) {
+    return this.db[key]
+  }
+
+  get_or_element(key, defaultElement) {
+    const element = this.db[key]
+    if (element === undefined) {
+      return defaultElement
+    } else {
+      return element
+    }
+  }
+
+  put(key, value) {
+    if (key === undefined || value === undefined) {
+      throw Error('key or value is undefined')
+    }
+    this.db[key] = value
+  }
+
+  del(key) {
+    delete this.db[key]
+  }
+
+  put_batch(key_values) {
+    key_values.forEach(element => {
+      this.db[element.key] = element.value
+    })
+  }
+}
+
+module.exports = JsStorage