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/http.go  |  9 +++++----
 src/http/posts.go | 57 ++++++++++++++++++++++++++++---------------------------
 src/http/tpl.go   |  2 +-
 3 files changed, 35 insertions(+), 33 deletions(-)

(limited to 'src/http')

diff --git a/src/http/http.go b/src/http/http.go
index 6e57a77..4403a69 100644
--- a/src/http/http.go
+++ b/src/http/http.go
@@ -126,9 +126,10 @@ type api struct {
 	params Params
 	srv    *http.Server
 
-	redirectTpl *template.Template
-	auther      Auther
-	urlBuilder  render.URLBuilder
+	redirectTpl         *template.Template
+	auther              Auther
+	urlBuilder          render.URLBuilder
+	postPreprocessFuncs postPreprocessFuncs
 }
 
 // New initializes and returns a new API instance, including setting up all
@@ -156,12 +157,12 @@ func New(params Params) (API, error) {
 		),
 	}
 
+	a.postPreprocessFuncs = newPostPreprocessFuncs(a.urlBuilder)
 	a.redirectTpl = mustParseTpl(template.New(""), "redirect.html")
 
 	a.srv = &http.Server{Handler: a.handler()}
 
 	go func() {
-
 		err := a.srv.Serve(l)
 		if err != nil && !errors.Is(err, http.ErrServerClosed) {
 			ctx := mctx.WithAnnotator(context.Background(), &a.params)
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")
diff --git a/src/http/tpl.go b/src/http/tpl.go
index 47cea80..42341a2 100644
--- a/src/http/tpl.go
+++ b/src/http/tpl.go
@@ -66,7 +66,7 @@ func (a *api) newTPLData(r *http.Request, payload interface{}) tplData {
 			a.params.PostStore,
 			a.params.PostAssetStore,
 			a.params.PostDraftStore,
-			a.postPreprocessFuncs(),
+			a.postPreprocessFuncs,
 		),
 		Payload: payload,
 		Title:   "mediocregopher's lil web corner",
-- 
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