1 files changed, 37 insertions, 0 deletions
diff --git a/app/scripts/lib/observable/local-storage.js b/app/scripts/lib/observable/local-storage.js
new file mode 100644
index 000000000..6ed3860f6
--- /dev/null
+++ b/app/scripts/lib/observable/local-storage.js
@@ -0,0 +1,37 @@
+const ObservableStore = require('./index')
+
+//
+// LocalStorageStore
+//
+// uses localStorage instead of a cache
+//
+
+class LocalStorageStore extends ObservableStore {
+
+  constructor (opts) {
+    super()
+    delete this._state
+
+    this._opts = opts || {}
+    if (!this._opts.storageKey) {
+      throw new Error('LocalStorageStore - no "storageKey" specified')
+    }
+    this._storageKey = this._opts.storageKey
+  }
+
+  get() {
+    try {
+      return JSON.parse(global.localStorage[this._storageKey])
+    } catch (err) {
+      return undefined
+    }
+  }
+
+  _put(newState) {
+    global.localStorage[this._storageKey] = JSON.stringify(newState)
+    this.emit('update', newState)
+  }
+
+}
+
+module.exports = LocalStorageStore