Fully implemented Class.removeUser

lib/Class.js

@@ -231,14 +231,27 @@ class Class {
 		}
 	}
 
-	removeUser(u) {
-		switch (u.type) {
-			case 'account':
-				break;
-			case 'student':
-				break;
-			default:
-				throw new Error('Invalid user type');
+	async removeUser(u) {
+		const validTypes = [ 'account', 'student' ];
+
+		if (!validTypes.includes(u.type))
+			throw new Error('Invalid user type');
+
+		const sql = `
+			delete from ${u.type}ClassLink
+			where
+				${u.type}id = ?
+				and classId = ?;
+		`;
+
+		try {
+			await this.#conn.runQuery(sql, [
+				u.id,
+				this.id
+			]);
+		} catch (e) {
+			console.error(e);
+			throw new Error('Could not remove user from class');
 		}
 	}