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91 lines
2.1 KiB
91 lines
2.1 KiB
package api
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import (
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"errors"
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"fmt"
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"html/template"
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"net/http"
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"path/filepath"
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"strings"
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"github.com/gomarkdown/markdown"
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"github.com/gomarkdown/markdown/html"
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"github.com/gomarkdown/markdown/parser"
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"github.com/mediocregopher/blog.mediocregopher.com/srv/api/apiutil"
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"github.com/mediocregopher/blog.mediocregopher.com/srv/post"
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)
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func (a *api) postHandler() http.Handler {
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return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
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id := strings.TrimSuffix(filepath.Base(r.URL.Path), ".html")
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storedPost, err := a.params.PostStore.GetByID(id)
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if errors.Is(err, post.ErrPostNotFound) {
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http.Error(rw, "Post not found", 404)
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return
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} else if err != nil {
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apiutil.InternalServerError(
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rw, r, fmt.Errorf("fetching post with id %q: %w", id, err),
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)
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return
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}
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parserExt := parser.CommonExtensions | parser.AutoHeadingIDs
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parser := parser.NewWithExtensions(parserExt)
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htmlFlags := html.CommonFlags | html.HrefTargetBlank
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htmlRenderer := html.NewRenderer(html.RendererOptions{Flags: htmlFlags})
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renderedBody := markdown.ToHTML([]byte(storedPost.Body), parser, htmlRenderer)
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tplData := struct {
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post.StoredPost
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SeriesPrevious, SeriesNext *post.StoredPost
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Body template.HTML
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}{
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StoredPost: storedPost,
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Body: template.HTML(renderedBody),
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}
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if series := storedPost.Series; series != "" {
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seriesPosts, err := a.params.PostStore.GetBySeries(series)
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if err != nil {
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apiutil.InternalServerError(
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rw, r,
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fmt.Errorf("fetching posts for series %q: %w", series, err),
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)
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return
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}
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var foundThis bool
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for i := range seriesPosts {
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seriesPost := seriesPosts[i]
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if seriesPost.ID == storedPost.ID {
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foundThis = true
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continue
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}
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if !foundThis {
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tplData.SeriesPrevious = &seriesPost
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continue
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}
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tplData.SeriesNext = &seriesPost
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break
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}
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}
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if err := tpls.ExecuteTemplate(rw, "post.html", tplData); err != nil {
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apiutil.InternalServerError(
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rw, r, fmt.Errorf("rendering post with id %q: %w", id, err),
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)
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return
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}
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})
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}
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