Build a Blog Platform API with ASP.NET Core

Problem/Feature Description

A content team needs a REST API for their blogging platform. The API is built with ASP.NET Core and C#. A Next.js frontend hosted on a separate domain will consume it. The API will eventually run on a cloud VM behind a load balancer.

The API needs the following endpoints:

• GET /api/posts -- list all published posts (public, supports ?page=1&pageSize=10&tag=csharp)
• GET /api/posts/{slug} -- get a single post by its URL slug (public)
• POST /api/posts -- create a new blog post (authenticated, accepts title, content, tags array, isPublished)
• PUT /api/posts/{slug} -- update an existing post (authenticated, author only)
• DELETE /api/posts/{slug} -- delete a post (authenticated, author or admin)
• POST /api/posts/{slug}/comments -- add a comment to a post (authenticated, accepts body)
• GET /api/posts/{slug}/comments -- list comments on a post (public)

Use an in-memory data store. Posts have Id, Title, Slug, Content, Tags, AuthorId, IsPublished, CreatedAt, UpdatedAt. Comments have Id, PostId, AuthorId, Body, CreatedAt. Generate URL slugs from post titles.

Output Specification

Produce:

• Program.cs -- Application setup with all middleware and service registration
• Controllers/PostsController.cs -- Blog post CRUD endpoints
• Controllers/CommentsController.cs -- Comment endpoints
• Models/ -- Request DTOs, response DTOs, and entity classes
• Services/PostService.cs -- Post management business logic
• appsettings.json -- Configuration file
• BlogApi.csproj -- Project file with NuGet packages