UI UI UI UI UI

1 files changed, 35 insertions, 0 deletions

diff --git a/record-store.js b/record-store.js
new file mode 100644
index 0000000..d0c7623
--- /dev/null
+++ b/record-store.js
@@ -0,0 +1,35 @@
+const recordSymbolKey = Symbol()
+
+module.exports = class RecordStore {
+  constructor() {
+    // Each track (or whatever) gets a symbol which is used as a key here to
+    // store more information.
+    this.data = {}
+  }
+
+  getRecord(obj) {
+    if (typeof obj !== 'object') {
+      throw new TypeError('Cannot get the record of a non-object')
+    }
+
+    if (!obj[recordSymbolKey]) {
+      obj[recordSymbolKey] = Symbol()
+    }
+
+    if (!this.data[obj[recordSymbolKey]]) {
+      this.data[obj[recordSymbolKey]] = {}
+    }
+
+    return this.data[obj[recordSymbolKey]]
+  }
+
+  deleteRecord(obj) {
+    if (typeof obj !== 'object') {
+      throw new TypeError('Non-objects cannot have a record in the first place')
+    }
+
+    if (obj[recordSymbolKey]) {
+      delete this.data[obj[recordSymbolKey]]
+    }
+  }
+}