package http import ( "errors" "fmt" "net/http" "path/filepath" "strings" "github.com/mediocregopher/blog.mediocregopher.com/srv/http/apiutil" "github.com/mediocregopher/blog.mediocregopher.com/srv/post" ) func (a *api) renderDraftPostHandler() http.Handler { tpl := a.mustParseBasedTpl("post.html") renderDraftPostsIndexHandler := a.renderDraftPostsIndexHandler() renderDraftEditPostHandler := a.renderEditPostHandler(true) return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) { id := strings.TrimSuffix(filepath.Base(r.URL.Path), ".html") if id == "/" { renderDraftPostsIndexHandler.ServeHTTP(rw, r) return } if _, ok := r.URL.Query()["edit"]; ok { renderDraftEditPostHandler.ServeHTTP(rw, r) return } p, err := a.params.PostDraftStore.GetByID(id) if errors.Is(err, post.ErrPostNotFound) { http.Error(rw, "Post not found", 404) return } else if err != nil { apiutil.InternalServerError( rw, r, fmt.Errorf("fetching post with id %q: %w", id, err), ) return } tplPayload, err := a.postToPostTplPayload(post.StoredPost{Post: p}) if err != nil { apiutil.InternalServerError( rw, r, fmt.Errorf( "generating template payload for post with id %q: %w", id, err, ), ) return } executeTemplate(rw, r, tpl, tplPayload) }) } func (a *api) renderDraftPostsIndexHandler() http.Handler { renderEditPostHandler := a.renderEditPostHandler(true) tpl := a.mustParseBasedTpl("draft-posts.html") const pageCount = 20 return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) { if _, ok := r.URL.Query()["edit"]; ok { renderEditPostHandler.ServeHTTP(rw, r) return } page, err := apiutil.StrToInt(r.FormValue("p"), 0) if err != nil { apiutil.BadRequest( rw, r, fmt.Errorf("invalid page number: %w", err), ) return } posts, hasMore, err := a.params.PostDraftStore.Get(page, pageCount) if err != nil { apiutil.InternalServerError( rw, r, fmt.Errorf("fetching page %d of posts: %w", page, err), ) return } tplPayload := struct { Posts []post.Post PrevPage, NextPage int }{ Posts: posts, PrevPage: -1, NextPage: -1, } if page > 0 { tplPayload.PrevPage = page - 1 } if hasMore { tplPayload.NextPage = page + 1 } executeTemplate(rw, r, tpl, tplPayload) }) } func (a *api) postDraftPostHandler() http.Handler { return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) { p, err := postFromPostReq(r) if err != nil { apiutil.BadRequest(rw, r, err) return } if err := a.params.PostDraftStore.Set(p); err != nil { apiutil.InternalServerError( rw, r, fmt.Errorf("storing post with id %q: %w", p.ID, err), ) return } a.executeRedirectTpl(rw, r, a.draftURL(p.ID, false)+"?edit") }) }