Created diagnostic tools

server/diagnostics.js

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+//environment variables
+require('dotenv').config();
+
+//libraries
+let CronJob = require('cron').CronJob;
+
+//utilities
+let { log } = require('../common/utilities.js');
+
+const runDailyDiagnostics = (connection) => {
+	let dailyJob = new CronJob('0 0 * * * *', () => {
+		let query = 'INSERT INTO diagnostics (playerCount, totalGold, totalRecruitments, totalDeaths, totalCombats) VALUES ((SELECT COUNT(*) FROM profiles), (SELECT SUM(gold) FROM profiles), (IFNULL((SELECT SUM(quantity) FROM diagnosticsEvents WHERE eventName = "recruit"), 0)), (IFNULL((SELECT SUM(quantity) FROM diagnosticsEvents WHERE eventName = "death"), 0)), (SELECT COUNT(*) FROM pastCombat WHERE eventTime >= DATE_SUB(CURRENT_TIMESTAMP(), INTERVAL 1 DAY)));';
+		connection.query(query, (err) => {
+			if (err) throw err;
+
+			let query = 'DELETE FROM diagnosticsEvents;';
+			connection.query(query, (err) => {
+				if (err) throw err;
+
+				log('Daily diagnostics taken');
+			});
+		});
+	});
+
+	dailyJob.start();
+};
+
+//current name parameters: 'recruit', 'death'
+const logDiagnostics = (connection, name, quantity) => {
+	let query = 'INSERT INTO diagnosticsEvents (eventName, quantity) VALUES (?, ?);';
+	connection.query(query, [name, quantity], (err) => {
+		if (err) throw err;
+	});
+};
+
+module.exports = {
+	runDailyDiagnostics: runDailyDiagnostics,
+	logDiagnostics: logDiagnostics
+};