From 4c04177c05355ddb92d3d31a4c5cfbaa86555a13 Mon Sep 17 00:00:00 2001
From: Brian Picciano <mediocregopher@gmail.com>
Date: Sat, 14 May 2022 16:14:11 -0600
Subject: Move template rendering logic into api package

---
 srv/src/api/posts.go | 65 ++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 55 insertions(+), 10 deletions(-)

(limited to 'srv/src/api/posts.go')

diff --git a/srv/src/api/posts.go b/srv/src/api/posts.go
index 995f2fb..cc7a176 100644
--- a/srv/src/api/posts.go
+++ b/srv/src/api/posts.go
@@ -3,11 +3,15 @@ package api
 import (
 	"errors"
 	"fmt"
+	"html/template"
 	"net/http"
 	"path/filepath"
 	"strings"
 
-	"github.com/mediocregopher/blog.mediocregopher.com/srv/api/apiutils"
+	"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"
 )
 
@@ -22,22 +26,63 @@ func (a *api) postHandler() http.Handler {
 			http.Error(rw, "Post not found", 404)
 			return
 		} else if err != nil {
-			apiutils.InternalServerError(
+			apiutil.InternalServerError(
 				rw, r, fmt.Errorf("fetching post with id %q: %w", id, err),
 			)
 			return
 		}
 
-		renderablePost, err := post.NewRenderablePost(a.params.PostStore, storedPost)
-		if err != nil {
-			apiutils.InternalServerError(
-				rw, r, fmt.Errorf("constructing renderable 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)
+
+		tplData := 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 {
+					tplData.SeriesPrevious = &seriesPost
+					continue
+				}
+
+				tplData.SeriesNext = &seriesPost
+				break
+			}
 		}
 
-		if err := a.params.PostHTTPRenderer.Render(rw, renderablePost); err != nil {
-			apiutils.InternalServerError(
+		if err := tpls.ExecuteTemplate(rw, "post.html", tplData); err != nil {
+			apiutil.InternalServerError(
 				rw, r, fmt.Errorf("rendering post with id %q: %w", id, err),
 			)
 			return
-- 
cgit v1.2.3