feat(lib): adding a external parsing function

src/lib/parsing.ts

@@ -0,0 +1,26 @@
+import { GuildMember } from 'discord.js';
+
+export function parseMessage(template: string, member: GuildMember): string {
+	const placeholders = new Map<string, string | (() => string)>([
+		['{user.mention}', `<@${member.id}>`],
+		['{user.name}', member.user.username],
+		['{user.tag}', member.user.tag],
+		['{user.id}', member.id],
+
+		['{server.name}', member.guild.name],
+		['{server.id}', member.guild.id],
+		['{server.member.count}', () => member.guild.memberCount.toString()],
+		['{server.owner}', () => `<@${member.guild.ownerId}>`],
+
+		['{date.now}', () => new Date().toLocaleString('fr-FR')],
+	]);
+
+	for (const [key, value] of placeholders.entries()) {
+		template = template.replace(
+			new RegExp(key, 'g'),
+			typeof value === 'function' ? value() : value,
+		);
+	}
+
+	return template;
+}