From b2447bc967df37b31282a97e32c581954bb8bcc9 Mon Sep 17 00:00:00 2001
From: René 'Necoro' Neumann <necoro@necoro.eu>
Date: Thu, 17 Oct 2024 16:37:23 +0200
Subject: Move from html/template to templ

---
 pages/page.go | 58 ++++++++++++++++++++++++++++++++++++----------------------
 1 file changed, 36 insertions(+), 22 deletions(-)

(limited to 'pages/page.go')

diff --git a/pages/page.go b/pages/page.go
index 25c2331..6ce8cee 100644
--- a/pages/page.go
+++ b/pages/page.go
@@ -3,10 +3,10 @@ package pages
 import (
 	"context"
 	"gosten/model"
-	"gosten/templ"
 	"log"
 	"net/http"
 
+	"github.com/a-h/templ"
 	"github.com/go-chi/chi/v5"
 )
 
@@ -20,39 +20,53 @@ type Page interface {
 	http.Handler
 }
 
-type dataFunc func(r *http.Request, uid int32) any
+type dataFunc[T any] func(r *http.Request, uid int32) T
+type tplFunc[T any] func(T) templ.Component
 
-type simplePage struct {
-	dataFn   dataFunc
-	template string
-}
-
-func (p simplePage) ServeHTTP(w http.ResponseWriter, r *http.Request) {
-	input := p.dataFn(r, userId(r))
-	p.showTemplate(w, input)
-}
-
-func simpleByQuery[T any](tpl string, query func(ctx context.Context, id int32) (T, error)) Page {
-	dataFn := func(r *http.Request, uid int32) any {
+func simpleByQuery[T any](tpl tplFunc[T], query func(ctx context.Context, id int32) (T, error)) Page {
+	dataFn := func(r *http.Request, uid int32) T {
 		d, _ := query(r.Context(), uid)
 		return d
 	}
 	return simple(tpl, dataFn)
 }
 
-func simple(tpl string, dataFn dataFunc) Page {
-	p := simplePage{dataFn, tpl}
+func simple[T any](tpl tplFunc[T], dataFn dataFunc[T]) Page {
 	r := chi.NewRouter()
-	r.Get("/", p.ServeHTTP)
+	r.Get("/", func(w http.ResponseWriter, r *http.Request) {
+		input := dataFn(r, userId(r))
+		c := tpl(input)
+		render(c, w, r)
+	})
 	return r
 }
 
-func showTemplate(w http.ResponseWriter, tpl string, data any) {
-	if err := templ.Lookup(tpl).Execute(w, data); err != nil {
-		log.Panicf("Executing '%s' with %+v: %v", tpl, data, err)
+type ctxPath struct{}
+
+func render(c templ.Component, w http.ResponseWriter, r *http.Request) {
+	ctx := context.WithValue(r.Context(), ctxPath{}, r.URL.Path)
+	if err := c.Render(ctx, w); err != nil {
+		log.Panic(err.Error())
 	}
 }
 
-func (p simplePage) showTemplate(w http.ResponseWriter, data any) {
-	showTemplate(w, p.template, data)
+func isCurrPath(ctx context.Context, path string) bool {
+	currPath := ctx.Value(ctxPath{}).(string)
+	if path[0] != '/' {
+		path = "/" + path
+	}
+
+	if currPath == "/" {
+		return path == "/"
+	}
+
+	if currPath[len(currPath)-1] == '/' {
+		currPath = currPath[:len(currPath)-1]
+	}
+
+	if path[len(path)-1] == '/' {
+		path = path[:len(path)-1]
+	}
+
+	return currPath == path
 }
-- 
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