diff options
Diffstat (limited to 'srv/src/api/render.go')
| -rw-r--r-- | srv/src/api/render.go | 269 |
1 files changed, 0 insertions, 269 deletions
diff --git a/srv/src/api/render.go b/srv/src/api/render.go deleted file mode 100644 index b6f9572..0000000 --- a/srv/src/api/render.go +++ /dev/null @@ -1,269 +0,0 @@ -package api - -import ( - "embed" - "errors" - "fmt" - "html/template" - "io/fs" - "net/http" - "path/filepath" - "strings" - - "github.com/gomarkdown/markdown" - "github.com/gomarkdown/markdown/html" - "github.com/gomarkdown/markdown/parser" - "github.com/mediocregopher/blog.mediocregopher.com/srv/api/apiutil" - "github.com/mediocregopher/blog.mediocregopher.com/srv/post" -) - -//go:embed tpl -var tplFS embed.FS - -func mustReadTplFile(fileName string) string { - path := filepath.Join("tpl", fileName) - - b, err := fs.ReadFile(tplFS, path) - if err != nil { - panic(fmt.Errorf("reading file %q from tplFS: %w", path, err)) - } - - return string(b) -} - -func (a *api) mustParseTpl(name string) *template.Template { - - blogURL := func(path string) string { - - trailingSlash := strings.HasSuffix(path, "/") - path = filepath.Join(a.params.PathPrefix, "/v2", path) - - if trailingSlash { - path += "/" - } - - return path - } - - tpl := template.New("").Funcs(template.FuncMap{ - "BlogURL": blogURL, - "AssetURL": func(path string) string { - path = filepath.Join("assets", path) - return blogURL(path) - }, - }) - - tpl = template.Must(tpl.Parse(mustReadTplFile(name))) - - return tpl -} - -func (a *api) mustParseBasedTpl(name string) *template.Template { - tpl := a.mustParseTpl(name) - tpl = template.Must(tpl.New("base.html").Parse(mustReadTplFile("base.html"))) - return tpl -} - -type tplData struct { - Payload interface{} - CSRFToken string -} - -func (t tplData) CSRFFormInput() template.HTML { - return template.HTML(fmt.Sprintf( - `<input type="hidden" name="%s" value="%s" />`, - csrfTokenFormName, t.CSRFToken, - )) -} - -// executeTemplate expects to be the final action in an http.Handler -func executeTemplate( - rw http.ResponseWriter, r *http.Request, - tpl *template.Template, payload interface{}, -) { - - csrfToken, _ := apiutil.GetCookie(r, csrfTokenCookieName, "") - - tplData := tplData{ - Payload: payload, - CSRFToken: csrfToken, - } - - if err := tpl.Execute(rw, tplData); err != nil { - apiutil.InternalServerError( - rw, r, fmt.Errorf("rendering template: %w", err), - ) - return - } -} - -func (a *api) executeRedirectTpl( - rw http.ResponseWriter, r *http.Request, path string, -) { - executeTemplate(rw, r, a.redirectTpl, struct { - Path string - }{ - Path: path, - }) -} - -func (a *api) renderIndexHandler() http.Handler { - - tpl := a.mustParseBasedTpl("index.html") - const pageCount = 10 - - return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) { - - if path := r.URL.Path; !strings.HasSuffix(path, "/") && filepath.Base(path) != "index.html" { - http.Error(rw, "Page not found", 404) - 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.PostStore.WithOrderDesc().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.StoredPost - 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) renderPostHandler() http.Handler { - - tpl := a.mustParseBasedTpl("post.html") - - return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) { - - id := strings.TrimSuffix(filepath.Base(r.URL.Path), ".html") - - storedPost, err := a.params.PostStore.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 - } - - parserExt := parser.CommonExtensions | parser.AutoHeadingIDs - parser := parser.NewWithExtensions(parserExt) - - htmlFlags := html.CommonFlags | html.HrefTargetBlank - htmlRenderer := html.NewRenderer(html.RendererOptions{Flags: htmlFlags}) - - renderedBody := markdown.ToHTML([]byte(storedPost.Body), parser, htmlRenderer) - - tplPayload := struct { - post.StoredPost - SeriesPrevious, SeriesNext *post.StoredPost - Body template.HTML - }{ - StoredPost: storedPost, - Body: template.HTML(renderedBody), - } - - if series := storedPost.Series; series != "" { - - seriesPosts, err := a.params.PostStore.GetBySeries(series) - if err != nil { - apiutil.InternalServerError( - rw, r, - fmt.Errorf("fetching posts for series %q: %w", series, err), - ) - return - } - - var foundThis bool - - for i := range seriesPosts { - - seriesPost := seriesPosts[i] - - if seriesPost.ID == storedPost.ID { - foundThis = true - continue - } - - if !foundThis { - tplPayload.SeriesPrevious = &seriesPost - continue - } - - tplPayload.SeriesNext = &seriesPost - break - } - } - - executeTemplate(rw, r, tpl, tplPayload) - }) -} - -func (a *api) renderDumbHandler(tplName string) http.Handler { - - tpl := a.mustParseBasedTpl(tplName) - - return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) { - if err := tpl.Execute(rw, nil); err != nil { - apiutil.InternalServerError( - rw, r, fmt.Errorf("rendering %q: %w", tplName, err), - ) - return - } - }) -} - -func (a *api) renderPostAssetsIndexHandler() http.Handler { - - tpl := a.mustParseBasedTpl("assets.html") - - return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) { - - ids, err := a.params.PostAssetStore.List() - - if err != nil { - apiutil.InternalServerError( - rw, r, fmt.Errorf("getting list of asset ids: %w", err), - ) - return - } - - tplPayload := struct { - IDs []string - }{ - IDs: ids, - } - - executeTemplate(rw, r, tpl, tplPayload) - }) -} |