Refactor server.go

server.go

@@ -11,10 +11,6 @@ import (
 
 const PORT = 3003
 
-type frontendInfo struct {
-	Name, Mountpoint string
-}
-
 //go:embed "all:vuejs/dist"
 var vueFiles embed.FS
 
@@ -33,11 +29,26 @@ var alpineFiles embed.FS
 //go:embed "react"
 var reactFiles embed.FS
 
-func addFrontend(files embed.FS, mountpoint string, subfs string, name string) frontendInfo {
-	subFiles, _ := fs.Sub(files, subfs)
-	fileServer := http.FileServerFS(subFiles)
-	http.Handle(mountpoint, http.StripPrefix(mountpoint, fileServer))
-	return frontendInfo{name, mountpoint}
+type frontendInfo struct {
+	Name, Mountpoint string
+	Filesystem       fs.FS
+}
+
+var frontends = []frontendInfo{
+	{"JS Only", "/vanillaJS/", getSubFS(vanillaFiles, "vanillaJS")},
+	{"Alpine.js", "/alpinejs/", getSubFS(alpineFiles, "alpinejs")},
+	{"React", "/react/", getSubFS(reactFiles, "react")},
+	{"React (Next)", "/reactNextJS/", getSubFS(nextFiles, "reactNextJS/out")},
+	{"Vue.js", "/vuejs/", getSubFS(vueFiles, "vuejs/dist")},
+	{"Svelte", "/svelte/", getSubFS(svelteFiles, "svelte/dist")},
+}
+
+func getSubFS(f fs.FS, dir string) fs.FS {
+	files, err := fs.Sub(f, dir)
+	if err != nil {
+		panic(err)
+	}
+	return files
 }
 
 func outputIndexAndExit(indexTemplate template.Template, frontends []frontendInfo) {
@@ -45,8 +56,8 @@ func outputIndexAndExit(indexTemplate template.Template, frontends []frontendInf
 	if err != nil {
 		panic(err) // Handle error
 	}
-	defer file.Close()
 	indexTemplate.Execute(file, frontends)
+	file.Close()
 	os.Exit(0)
 }
 
@@ -58,19 +69,15 @@ func main() {
 		panic(fmt.Sprintf("Error parsing homepage template\n%s", err))
 	}
 
-	frontends := []frontendInfo{
-		addFrontend(vanillaFiles, "/vanillaJS/", "vanillaJS", "JS Only"),
-		addFrontend(alpineFiles, "/alpinejs/", "alpinejs", "Alpine.js"),
-		addFrontend(reactFiles, "/react/", "react", "React"),
-		addFrontend(nextFiles, "/reactNextJS/", "reactNextJS/out", "React (Next.js)"),
-		addFrontend(vueFiles, "/vuejs/", "vuejs/dist", "Vue.js"),
-		addFrontend(svelteFiles, "/svelte/", "svelte/dist", "Svelte"),
-	}
-
 	if len(args) == 2 && args[1] == "generate" {
 		outputIndexAndExit(*home_template, frontends)
 	}
 
+	for _, info := range frontends {
+		fileServer := http.FileServerFS(info.Filesystem)
+		http.Handle(info.Mountpoint, http.StripPrefix(info.Mountpoint, fileServer))
+	}
+
 	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
 		err = home_template.Execute(w, frontends)
 	})