feat(cloud): write worspace slug availability checks to db

packages/api/src/routers/workspace.ts

@@ -334,6 +334,14 @@ export const workspaceRouter = createTRPCRouter({
       }),
     )
     .query(async ({ ctx, input }) => {
+      const userId = ctx.user?.id;
+
+      if (!userId)
+        throw new TRPCError({
+          message: `User not authenticated`,
+          code: "UNAUTHORIZED",
+        });
+
       const slug = input.workspaceSlug.toLowerCase();
       // check slug is not reserved
       const workspaceSlug = await workspaceSlugRepo.getWorkspaceSlug(
@@ -345,6 +353,19 @@ export const workspaceRouter = createTRPCRouter({
       const isWorkspaceSlugAvailable =
         await workspaceRepo.isWorkspaceSlugAvailable(ctx.db, slug);
 
+      const isAvailable =
+        isWorkspaceSlugAvailable && workspaceSlug?.type !== "reserved";
+      const isReserved = workspaceSlug?.type === "reserved";
+
+      if (env("NEXT_PUBLIC_KAN_ENV") === "cloud") {
+        await workspaceSlugRepo.createWorkspaceSlugCheck(ctx.db, {
+          slug,
+          userId,
+          available: isAvailable,
+          reserved: isReserved,
+        });
+      }
+
       return {
         isAvailable:
           isWorkspaceSlugAvailable && workspaceSlug?.type !== "reserved",

packages/db/migrations/20250910200416_AddWorkspaceSlugChecks.sql

@@ -0,0 +1,22 @@
+CREATE TABLE IF NOT EXISTS "workspace_slug_checks" (
+	"id" bigserial PRIMARY KEY NOT NULL,
+	"slug" varchar(255) NOT NULL,
+	"available" boolean NOT NULL,
+	"reserved" boolean NOT NULL,
+	"workspaceId" bigint,
+	"createdBy" uuid,
+	"createdAt" timestamp DEFAULT now() NOT NULL
+);
+--> statement-breakpoint
+ALTER TABLE "workspace_slug_checks" ENABLE ROW LEVEL SECURITY;--> statement-breakpoint
+DO $$ BEGIN
+ ALTER TABLE "workspace_slug_checks" ADD CONSTRAINT "workspace_slug_checks_workspaceId_workspace_id_fk" FOREIGN KEY ("workspaceId") REFERENCES "public"."workspace"("id") ON DELETE no action ON UPDATE no action;
+EXCEPTION
+ WHEN duplicate_object THEN null;
+END $$;
+--> statement-breakpoint
+DO $$ BEGIN
+ ALTER TABLE "workspace_slug_checks" ADD CONSTRAINT "workspace_slug_checks_createdBy_user_id_fk" FOREIGN KEY ("createdBy") REFERENCES "public"."user"("id") ON DELETE set null ON UPDATE no action;
+EXCEPTION
+ WHEN duplicate_object THEN null;
+END $$;