Add ability to extract Subject from Class

lib/Class.js

@@ -15,6 +15,12 @@ class Class {
 	 */
 	subjectId;
 
+	/**
+	 * The subject the class is for
+	 * @type {Subject}
+	 */
+	subject;
+
 	/**
 	 * The name of the class
 	 * @type {string}
@@ -48,11 +54,16 @@ class Class {
 			for (const [ k, v ] of Object.entries(record[0]))
 				this[k] = v;
 
+			this.subject = await this.getSubject();
+
 			return this;
 		})();
 	}
 
-	get subject() {
+	async getSubject() {
+		return new (require('./Subject'))(this.subjectId);
+	}
+
 
 	}