Notify when a test result is changed

lib/TestResult.js

@@ -2,6 +2,7 @@
 
 const crypto = require('crypto');
 
+const { EmailBuilder, Emailer } = require('./Emailer');
 const MySQLDate = require('./MySQLDate');
 
 class TestResult {
@@ -97,7 +98,29 @@ class TestResult {
 			this.id
 		]);
 
+		let body = 'Your result has been changed for ' +
+			`the test "${this.test.template.name}" ` +
+			'that you took on ' +
+			`${this.test.dateString}\n\n` +
+			`Your previous result was ${this.mark}/` +
+			`${this.test.template.maxMark} ` +
+			`(${this.percentage}%) which was a grade ` +
+			`${this.grade}\n\n`;
+
 		this.mark = mark;
+
+		body += `Your new result is ${this.mark}/` +
+			`${this.test.template.maxMark} ` +
+			`(${this.percentage}%) which is a grade ` +
+			`${this.grade}`;
+
+		const email = new EmailBuilder()
+			.addTo([ this.student.getEmail() ])
+			.setSubject('Stratos - Test result changed')
+			.setBody(body);
+
+		const emailer = new Emailer();
+		await emailer.sendEmail(email);
 	}
 
 	get percentage() {