feat: Implement role-based access control and enhance permissions system

app/api/roles/promote/route.ts

@@ -0,0 +1,58 @@
+import { createDb } from "@/lib/db";
+import { roles, userRoles } from "@/lib/schema";
+import { eq } from "drizzle-orm";
+import { ROLES } from "@/lib/permissions";
+
+export const runtime = "edge";
+
+export async function POST(request: Request) {
+  try {
+    const { userId, roleName } = await request.json() as { userId: string, roleName: string };
+    if (!userId || !roleName) {
+      return Response.json(
+        { error: "缺少必要参数" },
+        { status: 400 }
+      );
+    }
+
+    if (roleName !== ROLES.KNIGHT) {
+      return Response.json(
+        { error: "角色不合法" },
+        { status: 400 }
+      );
+    }
+
+    const db = createDb();
+
+    let targetRole = await db.query.roles.findFirst({
+      where: eq(roles.name, roleName),
+    });
+
+    if (!targetRole) {
+      const [newRole] = await db.insert(roles)
+        .values({
+          name: roleName,
+          description: "高级用户",
+        })
+        .returning();
+      targetRole = newRole;
+    }
+
+    await db.delete(userRoles)
+      .where(eq(userRoles.userId, userId));
+
+    await db.insert(userRoles)
+      .values({
+        userId,
+        roleId: targetRole.id,
+      });
+
+    return Response.json({ success: true });
+  } catch (error) {
+    console.error("Failed to promote user:", error);
+    return Response.json(
+      { error: "升级用户失败" },
+      { status: 500 }
+    );
+  }
+}