cli: organize file structure

apps/cli/src/prompts/backend.ts

@@ -0,0 +1,79 @@
+import { cancel, isCancel, select } from "@clack/prompts";
+import pc from "picocolors";
+import { DEFAULT_CONFIG } from "../constants";
+import type { Backend, Frontend } from "../types";
+
+export async function getBackendFrameworkChoice(
+	backendFramework?: Backend,
+	frontends?: Frontend[],
+): Promise<Backend> {
+	if (backendFramework !== undefined) return backendFramework;
+
+	const hasIncompatibleFrontend = frontends?.some(
+		(f) => f === "nuxt" || f === "solid",
+	);
+
+	const backendOptions: Array<{
+		value: Backend;
+		label: string;
+		hint: string;
+	}> = [
+		{
+			value: "hono" as const,
+			label: "Hono",
+			hint: "Lightweight, ultrafast web framework",
+		},
+		{
+			value: "next" as const,
+			label: "Next.js",
+			hint: "Nextjs API routes",
+		},
+		{
+			value: "express" as const,
+			label: "Express",
+			hint: "Fast, unopinionated, minimalist web framework for Node.js",
+		},
+		{
+			value: "fastify" as const,
+			label: "Fastify",
+			hint: "Fast, low-overhead web framework for Node.js",
+		},
+		{
+			value: "elysia" as const,
+			label: "Elysia",
+			hint: "Ergonomic web framework for building backend servers",
+		},
+	];
+
+	if (!hasIncompatibleFrontend) {
+		backendOptions.push({
+			value: "convex" as const,
+			label: "Convex",
+			hint: "Reactive backend-as-a-service platform",
+		});
+	}
+
+	backendOptions.push({
+		value: "none" as const,
+		label: "None",
+		hint: "No backend server",
+	});
+
+	let initialValue = DEFAULT_CONFIG.backend;
+	if (hasIncompatibleFrontend && initialValue === "convex") {
+		initialValue = "hono";
+	}
+
+	const response = await select<Backend>({
+		message: "Select backend",
+		options: backendOptions,
+		initialValue,
+	});
+
+	if (isCancel(response)) {
+		cancel(pc.red("Operation cancelled"));
+		process.exit(0);
+	}
+
+	return response;
+}