cvmts: Add staff audit logging support

Basically what it says on the tin.

More staff operations should probably be audited, but for now this provides a good starting point.

cvmts/src/AuditLog.ts

@@ -0,0 +1,62 @@
+import pino from 'pino';
+import { Rank, User } from './User.js';
+
+// Staff audit log.
+// TODO: 
+//	- Hook this up to a db or something instead of misusing pino
+export class AuditLog {
+	private auditLogger = pino({
+		name: 'AuditLog',
+		transport: {
+			target: 'pino/file',
+			options: {
+				destination: './audit.log'
+			}
+		}
+	});
+
+	private static StaffHonorFromRank(user: User, uppercase: boolean) {
+		switch (user.rank) {
+			case Rank.Moderator:
+				if (uppercase) return 'Moderator';
+				else return 'moderator';
+
+			case Rank.Admin:
+				if (uppercase) return 'Administrator';
+				else return 'administrator';
+
+			default:
+				throw new Error("input user is not staff.. how'd you even get here?");
+		}
+	}
+
+	onReset(callingUser: User) {
+		this.auditLogger.info({ staffUsername: callingUser.username }, `${AuditLog.StaffHonorFromRank(callingUser, true)} reset the virtual machine.`);
+	}
+
+	onReboot(callingUser: User) {
+		this.auditLogger.info({ staffUsername: callingUser.username }, `${AuditLog.StaffHonorFromRank(callingUser, true)} rebooted the virtual machine.`);
+	}
+
+	onMute(callingUser: User, target: User, perm: boolean) {
+		this.auditLogger.info({ staffUsername: callingUser.username, targetUsername: target.username, perm: perm }, `${AuditLog.StaffHonorFromRank(callingUser, true)} muted user.`);
+	}
+
+	onUnmute(callingUser: User, target: User) {
+		this.auditLogger.info({ staffUsername: callingUser.username, targetUsername: target.username }, `${AuditLog.StaffHonorFromRank(callingUser, true)} unmuted user.`);
+	}
+
+	onKick(callingUser: User, target: User) {
+		this.auditLogger.info({ staffUsername: callingUser.username, targetUsername: target.username }, `${AuditLog.StaffHonorFromRank(callingUser, true)} kicked user.`);
+	}
+
+	onBan(callingUser: User, target: User) {
+		this.auditLogger.info({ staffUsername: callingUser.username, targetUsername: target.username }, `${AuditLog.StaffHonorFromRank(callingUser, true)} banned user.`);
+	}
+
+	onMonitorCommand(callingUser: User, command: string) {
+		this.auditLogger.info({ staffUsername: callingUser.username, commandLine: command }, `${AuditLog.StaffHonorFromRank(callingUser, true)} executed monitor command.`);
+	}
+}
+
+export let TheAuditLog = new AuditLog();