From f8bf946b090aa4fb0b8beb4ad09c1f06078f0b5b Mon Sep 17 00:00:00 2001
From: Alan Pearce
Date: Wed, 26 Jun 2024 11:20:15 +0200
Subject: make error pages dynamic

---
 internal/builder/builder.go |  5 -----
 internal/http/error.go      |  7 +++++++
 internal/website/mux.go     | 15 +++++----------
 templates/404.templ         | 13 -------------
 templates/error.templ       | 17 +++++++++++++++++
 5 files changed, 29 insertions(+), 28 deletions(-)
 create mode 100644 internal/http/error.go
 delete mode 100644 templates/404.templ
 create mode 100644 templates/error.templ

diff --git a/internal/builder/builder.go b/internal/builder/builder.go
index 08fa374..d855451 100644
--- a/internal/builder/builder.go
+++ b/internal/builder/builder.go
@@ -235,11 +235,6 @@ func build(outDir string, config config.Config) (*Result, error) {
 	h, _ = getHTMLStyleHash(publicDir, "index.html")
 	r.Hashes = append(r.Hashes, h)
 
-	log.Debug("rendering 404 page")
-	if err := renderToFile(templates.NotFound(config, "/404.html"), privateDir, "404.html"); err != nil {
-		return nil, err
-	}
-
 	log.Debug("rendering sitemap")
 	if err := writerToFile(sitemap, publicDir, "sitemap.xml"); err != nil {
 		return nil, err
diff --git a/internal/http/error.go b/internal/http/error.go
new file mode 100644
index 0000000..8ad3e16
--- /dev/null
+++ b/internal/http/error.go
@@ -0,0 +1,7 @@
+package http
+
+type Error struct {
+	Error   error
+	Message string
+	Code    int
+}
diff --git a/internal/website/mux.go b/internal/website/mux.go
index a6e7ba0..fbd648e 100644
--- a/internal/website/mux.go
+++ b/internal/website/mux.go
@@ -6,6 +6,7 @@ import (
 	"path"
 	"strings"
 	"website/internal/config"
+	ihttp "website/internal/http"
 	"website/internal/log"
 	"website/templates"
 
@@ -14,12 +15,6 @@ import (
 	"github.com/pkg/errors"
 )
 
-type HTTPError struct {
-	Error   error
-	Message string
-	Code    int
-}
-
 func canonicalisePath(path string) (cPath string, differs bool) {
 	cPath = path
 	if strings.HasSuffix(path, "/index.html") {
@@ -31,7 +26,7 @@ func canonicalisePath(path string) (cPath string, differs bool) {
 	return cPath, differs
 }
 
-type webHandler func(http.ResponseWriter, *http.Request) *HTTPError
+type webHandler func(http.ResponseWriter, *http.Request) *ihttp.Error
 
 type WrappedWebHandler struct {
 	config  *config.Config
@@ -55,7 +50,7 @@ func (fn WrappedWebHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	if err := fn.handler(w, r); err != nil {
 		if strings.Contains(r.Header.Get("Accept"), "text/html") {
 			w.WriteHeader(err.Code)
-			err := templates.NotFound(*fn.config, r.URL.Path).Render(r.Context(), w)
+			err := templates.Error(*fn.config, r.URL.Path, err).Render(r.Context(), w)
 			if err != nil {
 				http.Error(w, err.Error(), http.StatusInternalServerError)
 			}
@@ -76,7 +71,7 @@ func NewMux(cfg *config.Config, root string) (mux *http.ServeMux, err error) {
 	}
 	templates.Setup()
 
-	mux.Handle("/", wrapHandler(cfg, func(w http.ResponseWriter, r *http.Request) *HTTPError {
+	mux.Handle("/", wrapHandler(cfg, func(w http.ResponseWriter, r *http.Request) *ihttp.Error {
 		urlPath, shouldRedirect := canonicalisePath(r.URL.Path)
 		if shouldRedirect {
 			http.Redirect(w, r, urlPath, 302)
@@ -85,7 +80,7 @@ func NewMux(cfg *config.Config, root string) (mux *http.ServeMux, err error) {
 		}
 		file := GetFile(urlPath)
 		if file == nil {
-			return &HTTPError{
+			return &ihttp.Error{
 				Message: "File not found",
 				Code:    http.StatusNotFound,
 			}
diff --git a/templates/404.templ b/templates/404.templ
deleted file mode 100644
index 4b5e52a..0000000
--- a/templates/404.templ
+++ /dev/null
@@ -1,13 +0,0 @@
-package templates
-
-import "website/internal/config"
-
-templ NotFound(config config.Config, path string) {
-	@Page(config, PageSettings{
-		Title: "Not Found",
-		Path:  path,
-	}) {
-		<h1>404</h1>
-		<h2>ʕノ•ᴥ•ʔノ ︵ ┻━┻</h2>
-	}
-}
diff --git a/templates/error.templ b/templates/error.templ
new file mode 100644
index 0000000..2da7bef
--- /dev/null
+++ b/templates/error.templ
@@ -0,0 +1,17 @@
+package templates
+
+import (
+	"website/internal/config"
+	"website/internal/http"
+	"strconv"
+)
+
+templ Error(config config.Config, path string, err *http.Error) {
+	@Page(config, PageSettings{
+		Title: "Error",
+		Path:  path,
+	}) {
+		<h1>{ strconv.Itoa(err.Code) } { err.Message }</h1>
+		<h2>ʕノ•ᴥ•ʔノ ︵ ┻━┻</h2>
+	}
+}
-- 
cgit 1.4.1