From 006c0028106425abb3f718b2e86349dee5b7a2ea Mon Sep 17 00:00:00 2001
From: Brian Picciano <mediocregopher@gmail.com>
Date: Sun, 26 May 2024 21:43:49 +0200
Subject: Refactor how preprocess functions work a bit

---
 src/http/posts.go | 57 ++++++++++++++++++++++++++++---------------------------
 1 file changed, 29 insertions(+), 28 deletions(-)

(limited to 'src/http/posts.go')

diff --git a/src/http/posts.go b/src/http/posts.go
index 8488996..1bc65c8 100644
--- a/src/http/posts.go
+++ b/src/http/posts.go
@@ -5,10 +5,10 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"html/template"
 	"net/http"
 	"path/filepath"
 	"strings"
-	txttpl "text/template"
 	"time"
 
 	"dev.mediocregopher.com/mediocre-blog.git/src/http/apiutil"
@@ -18,7 +18,18 @@ import (
 	"dev.mediocregopher.com/mediocre-go-lib.git/mctx"
 )
 
-func (a *api) postPreprocessFuncImage(args ...string) (string, error) {
+type postPreprocessFuncs struct {
+	urlBuilder render.URLBuilder
+	imageTpl   *template.Template
+}
+
+func newPostPreprocessFuncs(urlBuilder render.URLBuilder) postPreprocessFuncs {
+	imageTpl := template.New("image.html")
+	imageTpl = template.Must(imageTpl.Parse(mustReadTplFile("image.html")))
+	return postPreprocessFuncs{urlBuilder, imageTpl}
+}
+
+func (f postPreprocessFuncs) Image(args ...string) (string, error) {
 
 	var (
 		id    = args[0]
@@ -29,39 +40,29 @@ func (a *api) postPreprocessFuncImage(args ...string) (string, error) {
 		descr = args[1]
 	}
 
-	tpl := txttpl.New("image.html")
-	tpl = txttpl.Must(tpl.Parse(mustReadTplFile("image.html")))
-
-	tplPayload := struct {
-		RootURL   render.URLBuilder
-		ID        string
-		Descr     string
-		Resizable bool
-	}{
-		RootURL: render.NewURLBuilder(
-			a.params.PublicURL,
-			a.params.PublicURL, // httpURL
-			a.params.GeminiPublicURL,
-		),
-		ID:        id,
-		Descr:     descr,
-		Resizable: asset.IsImageResizable(id),
-	}
+	var (
+		tplPayload = struct {
+			RootURL   render.URLBuilder
+			ID        string
+			Descr     string
+			Resizable bool
+		}{
+			RootURL:   f.urlBuilder,
+			ID:        id,
+			Descr:     descr,
+			Resizable: asset.IsImageResizable(id),
+		}
+		buf = new(bytes.Buffer)
+	)
 
-	buf := new(bytes.Buffer)
-	if err := tpl.ExecuteTemplate(buf, "image.html", tplPayload); err != nil {
+	err := f.imageTpl.ExecuteTemplate(buf, "image.html", tplPayload)
+	if err != nil {
 		return "", err
 	}
 
 	return buf.String(), nil
 }
 
-func (a *api) postPreprocessFuncs() post.PreprocessFunctions {
-	return post.PreprocessFunctions{
-		Image: a.postPreprocessFuncImage,
-	}
-}
-
 func (a *api) getPostsHandler() http.Handler {
 	var (
 		tpl            = a.mustParseBasedTpl("posts.html")
-- 
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