fix: duplicated ticket numbers (fixes #418)

Now there is a change that a number will be skipped (if there's an error), but that isn't a problem.

src/lib/sync.js

@@ -2,6 +2,16 @@
  * @param {import("client")} client
  */
 module.exports = async client => {
+	// load ticket numbers
+	const guilds = await client.prisma.guild.findMany({ select: { id: true } });
+	for (const guild of guilds) {
+		const { _max: { number: max } } = await client.prisma.ticket.aggregate({
+			_max: { number: true },
+			where: { guildId: guild.id },
+		});
+		client.tickets.$numbers[guild.id] = max ?? 0;
+	}
+
 	// load total number of open tickets
 	const categories = await client.prisma.category.findMany({
 		select: {
@@ -60,4 +70,4 @@ module.exports = async client => {
 	client.log.info(`Loaded ${cooldowns} active cooldowns`);
 	client.log.info(`Closed ${deleted} deleted tickets`);
 	return true;
-};
+};

src/lib/tickets/manager.js

@@ -48,6 +48,7 @@ module.exports = class TicketManager {
 		this.client = client;
 		this.archiver = new TicketArchiver(client);
 		this.$count = { categories: {} };
+		this.$numbers = {};
 		this.$stale = new Collection();
 	}
 
@@ -134,6 +135,11 @@ module.exports = class TicketManager {
 		return await this.client.keyv.get(cacheKey);
 	}
 
+	getNextNumber(guildId) {
+		this.$numbers[guildId] += 1;
+		return this.$numbers[guildId];
+	}
+
 	/**
 	 * @param {object} data
 	 * @param {string} data.categoryId
@@ -373,7 +379,7 @@ module.exports = class TicketManager {
 		const guild = this.client.guilds.cache.get(category.guild.id);
 		const getMessage = this.client.i18n.getLocale(category.guild.locale);
 		const creator = await guild.members.fetch(interaction.user.id);
-		const number = (await this.client.prisma.ticket.count({ where: { guildId: category.guild.id } })) + 1;
+		const number = this.getNextNumber(category.guild.id);
 		const channelName = category.channelName
 			.replace(/{+\s?(user)?name\s?}+/gi, creator.user.username)
 			.replace(/{+\s?(nick|display)(name)?\s?}+/gi, creator.displayName)