Updating backend

- Added database self check
- Added more @me handlers
- Fixed issues

modules/databaseManager.js

@@ -1,4 +1,6 @@
 import mysql from 'mysql2';
+import dbconf from '../database.json';
+import { log } from './logManager';
 
 const connection = mysql.createConnection({
 	host: process.env.DATABASE_HOST,
@@ -23,4 +25,58 @@ function createPool(host, user, password, db) {
 	return newPool;
 }
 
-export { connection, pool, createPool };
+function databaseSelfTest() {
+	log('Database self-test');
+	dbconf.tables.forEach(table => {
+		let query = `CREATE TABLE IF NOT EXISTS ${table.name} (`;
+		table.columns.forEach((column, index) => {
+			query += `${column.name} ${column.type}`;
+			if (column.primary_key) query += ' PRIMARY KEY';
+			if (column.constraints && column.constraints.length > 0) query += ` ${column.constraints.join(' ')}`;
+			if (column.index) query += `, INDEX ${column.name}_idx (${column.name})`;
+			if (index < table.columns.length - 1) query += ', ';
+		});
+		if (table.constraints && table.constraints.length > 0) {
+			table.constraints.forEach(constraint => {
+				setTimeout(() => { // do not remove or it breaks /sarcasm
+				if (constraint.primary_key) query += `, PRIMARY KEY (${constraint.columns.join(', ')})`;
+				if (constraint.foreign_key) query += `, CONSTRAINT ${constraint.name} FOREIGN KEY (${constraint.column}) REFERENCES ${constraint.reference} ON DELETE ${constraint.on_delete} ON UPDATE ${constraint.on_update}`;
+				if (constraint.index) query += `, INDEX ${constraint.name} (${constraint.columns.join(', ')})`;
+				}, 500);
+			});
+		}
+		query += ') ENGINE=InnoDB;';
+		pool.query(query)
+			.then(() => log(`Table ${table.name} validated`))
+			.catch(err => console.log(`Error creating table ${table.name}: ${err}`));
+
+		if (table.data) {
+			pool.query(`SELECT * FROM ${table.name}`)
+				.then(([rows]) => {
+					if (rows.length === 0) {
+						table.data.forEach(row => {
+							let insertQuery = `INSERT INTO ${table.name} (`;
+							let values = 'VALUES (';
+							Object.keys(row).forEach((key, index) => {
+								insertQuery += key;
+								values += `'${row[key]}'`;
+								if (index < Object.keys(row).length - 1) {
+									insertQuery += ', ';
+									values += ', ';
+								}
+							});
+							insertQuery += ') ' + values + ');';
+							pool.query(insertQuery)
+								.then(() => log(`Row inserted in table ${table.name}`))
+								.catch(err => log(`Error inserting row in table ${table.name}: ${err}`));
+						});
+					}
+				})
+				.catch(err => log(`Error checking if table ${table.name} is empty: ${err}`));
+		}
+	});
+}
+
+databaseSelfTest();
+
+export { connection, pool, createPool, databaseSelfTest };