Add Class.createClass

lib/Class.js

@@ -1,7 +1,11 @@
 /* eslint-disable no-empty-function */
 'use strict';
 
+const crypto = require('crypto');
+
 const DatabaseConnectionPool = require('./DatabaseConnectionPool');
+
+const Subject = require('./Subject');
 const Test = require('./Test');
 
 class Class {
@@ -216,8 +220,43 @@ class Class {
 
 	}
 
-	static createClass() {
+	static async createClass(accountId, name, subjectId) {
+		const s = await new Subject(subjectId);
+		const a = await new (require('./Account'))(accountId);
 
+		const id = crypto.randomUUID();
+
+		const conn = await new DatabaseConnectionPool();
+
+		let sql = `
+			insert into class(
+				classId,
+				name,
+				subjectId)
+			values
+				(?, ?, ?);
+		`;
+
+		await conn.runQuery(sql, [
+			id,
+			name,
+			s.id
+		]);
+
+		sql = `
+			insert into accountClassLink(
+				accountId,
+				classId)
+			values
+				(?, ?);
+		`;
+
+		await conn.runQuery(sql, [
+			a.id,
+			id
+		]);
+
+		return new Class(id);
 	}
 }