Added TestTemplate constructor

lib/TestTemplate.js

@@ -1,13 +1,66 @@
 'use strict';
 
+// Import user defined modules
+const DatabaseConnectionPool = require('./DatabaseConnectionPool');
+
+/**
+ * A class that represents a test template
+ */
 class TestTemplate {
-	testTemplateId;
+	/**
+	 * The id of the test template
+	 * @type {string}
+	 */
+	id;
+
+	/**
+	 * The id of the account that created it
+	 * @type {string}
+	 */
 	accountId;
+
+	/**
+	 * The name of the test template
+	 * @type {string}
+	 */
 	name;
+
+	/**
+	 * The maximum mark of the test template
+	 * @type {number}
+	 */
 	maxMark;
 
-	constructor() {
+	/**
+	 * @param {string} testTemplateId - The id of the template to fetch
+	 */
+	constructor(testTemplateId) {
+		const sql = `
+			select
+				testTemplateId as id,
+				accountId,
+				name,
+				maxMark
+			from
+				testTemplate
+			where
+				testTemplateId = ?;
+		`;
 
+		return (async () => {
+			const conn = await new DatabaseConnectionPool();
+			const record = await conn.runQuery(sql, [
+				testTemplateId,
+			]);
+
+			if (!record.length)
+				throw new Error('No test template found');
+
+			for (const [ k, v ] of Object.entries(record[0]))
+				this[k] = v;
+
+			return this;
+		})();
 	}
 
 	assignClass() {