feat: guild banned precondition

src/preconditions/global/guildBanned.ts

@@ -0,0 +1,39 @@
+import { ApplyOptions } from "@sapphire/decorators";
+import { AllFlowsPrecondition } from "@sapphire/framework";
+import type {
+  ChatInputCommandInteraction,
+  ContextMenuCommandInteraction,
+  Message,
+} from "discord.js";
+
+@ApplyOptions<AllFlowsPrecondition.Options>({
+  position: 20,
+})
+export class GuildBannedPrecondition extends AllFlowsPrecondition {
+  public override chatInputRun(interaction: ChatInputCommandInteraction) {
+    return this.checkBanned(interaction.guildId);
+  }
+
+  public override contextMenuRun(interaction: ContextMenuCommandInteraction) {
+    return this.checkBanned(interaction.guildId);
+  }
+
+  public override messageRun(message: Message) {
+    return this.checkBanned(message.guildId);
+  }
+
+  private async checkBanned(guildId: string | null) {
+    if (!guildId) return this.ok();
+
+    const banned = await this.container.prisma.guild.findUnique({
+      where: { id: guildId, banned: true },
+    });
+
+    if (!banned) return this.ok();
+
+    return this.error({
+      identifier: "guildBanned",
+      message: "Your server has been banned from using Joewy.",
+    });
+  }
+}