Added session & session manager

models/session.js

@@ -0,0 +1,44 @@
+class Session {
+  constructor(id) {
+    this._id = id;
+    this._started = Date.now();
+    this._current = null;
+    this._previous = null;
+    this._lastScrobble = null;
+    this._pauseDuration = 0;
+  }
+
+  get id() {
+    return this._id;
+  }
+
+  get playing() {
+    return this._current;
+  }
+
+  set playing(value) {
+    this._current = value;
+  }
+
+  get started() {
+    return this._started;
+  }
+
+  get lastScrobbleTimestamp() {
+    return this._lastScrobble;
+  }
+
+  set lastScrobbleTimestamp(value) {
+    this._lastScrobble = value;
+  }
+
+  get pauseDuration() {
+    return this._pauseDuration;
+  }
+
+  set pauseDuration(value) {
+    this._pauseDuration = value;
+  }
+}
+
+module.exports = Session;