feat: add onboarding with oldmarr import (#1606)

packages/api/src/router/onboard/onboard-router.ts

@@ -0,0 +1,34 @@
+import { onboarding } from "@homarr/db/schema/sqlite";
+import { onboardingSteps } from "@homarr/definitions";
+import { z, zodEnumFromArray } from "@homarr/validation";
+
+import { createTRPCRouter, publicProcedure } from "../../trpc";
+import { getOnboardingOrFallbackAsync, nextOnboardingStepAsync } from "./onboard-queries";
+
+export const onboardRouter = createTRPCRouter({
+  currentStep: publicProcedure.query(async ({ ctx }) => {
+    return await getOnboardingOrFallbackAsync(ctx.db);
+  }),
+  nextStep: publicProcedure
+    .input(
+      z.object({
+        // Preferred step is only needed for 'preferred' conditions
+        preferredStep: zodEnumFromArray(onboardingSteps).optional(),
+      }),
+    )
+    .mutation(async ({ ctx, input }) => {
+      await nextOnboardingStepAsync(ctx.db, input.preferredStep);
+    }),
+  previousStep: publicProcedure.mutation(async ({ ctx }) => {
+    const { previous } = await getOnboardingOrFallbackAsync(ctx.db);
+
+    if (previous !== "start") {
+      return;
+    }
+
+    await ctx.db.update(onboarding).set({
+      previousStep: null,
+      step: "start",
+    });
+  }),
+});