From 30da18147923837c0786436b7363210df80fd055 Mon Sep 17 00:00:00 2001
From: Martin Fischer <martin@push-f.com>
Date: Sun, 13 Apr 2025 11:04:50 +0200
Subject: refactor: introduce handler struct

---
 lexsurf.go | 29 ++++++++++++++++-------------
 1 file changed, 16 insertions(+), 13 deletions(-)

(limited to 'lexsurf.go')

diff --git a/lexsurf.go b/lexsurf.go
index b9dbb66..1598613 100644
--- a/lexsurf.go
+++ b/lexsurf.go
@@ -10,12 +10,10 @@ import (
 	"text/template"
 )
 
-var countries = map[string]country{}
-var lawsByCC = map[string]map[string]law{}
-
 func main() {
+	var handler = handler{lawsByCC: map[string]map[string]law{}}
 	text, _ := ioutil.ReadFile("countries.json")
-	err := json.Unmarshal(text, &countries)
+	err := json.Unmarshal(text, &handler.countries)
 	if err != nil {
 		log.Fatal("search.json", err)
 	}
@@ -35,14 +33,14 @@ func main() {
 			log.Fatal(file.Name(), err)
 		}
 		cc := strings.SplitN(file.Name(), ".", 2)[0]
-		lawsByCC[cc] = map[string]law{}
+		handler.lawsByCC[cc] = map[string]law{}
 		for _, law := range laws {
 			if law.Redir != "" {
-				lawsByCC[cc][law.Redir] = law
+				handler.lawsByCC[cc][law.Redir] = law
 			}
 		}
 	}
-	http.HandleFunc("/", handler)
+	http.HandleFunc("/", handler.handle)
 	println("listening on 8000")
 	log.Fatal(http.ListenAndServe(":8000", nil))
 }
@@ -51,7 +49,12 @@ var tpl, _ = template.New("").Funcs(template.FuncMap{
 	"ToUpper": strings.ToUpper,
 }).ParseGlob("views/*")
 
-func handler(w http.ResponseWriter, r *http.Request) {
+type handler struct {
+	countries map[string]country
+	lawsByCC  map[string]map[string]law
+}
+
+func (h *handler) handle(w http.ResponseWriter, r *http.Request) {
 	if r.Host == "lex.surf" || r.Host == "lex.localhost" {
 		if r.URL.Path != "/" {
 			w.WriteHeader(http.StatusNotFound)
@@ -59,7 +62,7 @@ func handler(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 		err := tpl.ExecuteTemplate(w, "index.html", map[string]any{
-			"Countries": countries,
+			"Countries": h.countries,
 			"Domain":    r.Host,
 		})
 		if err != nil {
@@ -77,7 +80,7 @@ func handler(w http.ResponseWriter, r *http.Request) {
 	host := parts[1]
 	key := strings.TrimLeft(r.URL.Path, "/")
 	if len(key) > 0 {
-		val, ok := lawsByCC[cc][key]
+		val, ok := h.lawsByCC[cc][key]
 		if !ok {
 			w.WriteHeader(http.StatusNotFound)
 			w.Write([]byte("unknown law"))
@@ -87,7 +90,7 @@ func handler(w http.ResponseWriter, r *http.Request) {
 	} else {
 		query := r.URL.Query().Get("q")
 		if query != "" {
-			country, ok := countries[cc]
+			country, ok := h.countries[cc]
 			if !ok {
 				w.WriteHeader(http.StatusNotFound)
 				w.Write([]byte("search not implemented for this country"))
@@ -100,11 +103,11 @@ func handler(w http.ResponseWriter, r *http.Request) {
 				w.WriteHeader(http.StatusBadRequest)
 			}
 		}
-		_, hasJSONLaws := lawsByCC[cc]
+		_, hasJSONLaws := h.lawsByCC[cc]
 		err := tpl.ExecuteTemplate(w, "search.html", map[string]any{
 			"TLD":         cc,
 			"Domain":      host,
-			"Country":     countries[cc],
+			"Country":     h.countries[cc],
 			"HasJSONLaws": hasJSONLaws,
 		})
 		if err != nil {
-- 
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