mercury/web/api/posts/get_post.go

package posts

import (
	"net/http"

	"git.sleepycat.moe/sam/mercury/internal/database/sql"
	"git.sleepycat.moe/sam/mercury/web/api"
	"github.com/go-chi/chi/v5"
	"github.com/oklog/ulid/v2"
	"github.com/rs/zerolog/log"
)

func (app *App) GetID(w http.ResponseWriter, r *http.Request) (api.Post, error) {
	ctx := r.Context()
	id, err := ulid.Parse(chi.URLParamFromCtx(ctx, "postID"))
	if err != nil {
		return api.Post{}, api.Error{Code: api.ErrBlogNotFound}
	}

	conn, err := app.Database.Acquire(ctx)
	if err != nil {
		log.Err(err).Msg("acquiring connection")
		return api.Post{}, err
	}
	defer conn.Release()

	post, err := app.Post(conn).ByID(ctx, id)
	if err != nil {
		if err == sql.ErrNotFound {
			return api.Post{}, api.Error{Code: api.ErrBlogNotFound}
		}

		log.Err(err).Str("id", id.String()).Msg("fetching post from database")
		return api.Post{}, err
	}

	blog, err := app.Blog(conn).ByID(ctx, post.BlogID)
	if err != nil {
		log.Err(err).Str("id", post.BlogID.String()).Msg("fetching blog from database")
		return api.Post{}, err
	}

	acct, err := app.Account(conn).ByID(ctx, blog.AccountID)
	if err != nil {
		log.Err(err).Str("id", blog.AccountID.String()).Msg("fetching account from database")
		return api.Post{}, err
	}

	return api.DBPostToPost(post, blog, acct), nil
}