backend: frontend: cleaned up the codebase and added more logging for debuging

handlers/form_handler.go

@@ -8,25 +8,48 @@ import (
 	"net/http"
 )
 
+// FormHandler returns an http.HandlerFunc that handles form submissions.
+// It takes the content embed.FS, a pointer to a slice of model.Monster,
+// and a filename string as parameters.
+// The function parses the template files from the content FS,
+// executes the template with the provided data, and renders it as a response.
 func FormHandler(content embed.FS, monsters *[]model.Monster, filename string) http.HandlerFunc {
 	log.Print("FormHandler called")
+
+	// Lock the mutex to ensure exclusive access to the monsters slice.
 	mu.Lock()
 	defer mu.Unlock()
+
 	return func(w http.ResponseWriter, r *http.Request) {
-		tmpl, err := template.ParseFS(content, "templates/base.html", "templates/header.html", "templates/main.html", "templates/footer.html", "templates/monsterForm.html", "templates/monster.html", "templates/monsterTable.html")
+		log.Print("FormHandler handler called")
+
+		// Parse the template files.
+		templateFiles := []string{
+			"templates/base.html",
+			"templates/header.html",
+			"templates/main.html",
+			"templates/footer.html",
+			"templates/monsterForm.html",
+			"templates/monster.html",
+			"templates/monsterTable.html",
+		}
+		tmpl, err := template.ParseFS(content, templateFiles...)
 		if err != nil {
+			log.Printf("Template parsing error: %v\n", err)
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
 
-		err = tmpl.ExecuteTemplate(w, "base", map[string]interface{}{
+		// Execute the template and render the response.
+		data := map[string]interface{}{
 			"Title":    "Dungeons & Dragons Monster Generator",
 			"Monsters": *monsters,
-		})
+		}
+		err = tmpl.ExecuteTemplate(w, "base", data)
 		if err != nil {
 			log.Printf("Template execution error: %v\n", err)
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 		}
-		log.Printf("Template mit %d Monstern gerendert\n", len(*monsters))
+		log.Printf("Template rendered with %d Monsters\n", len(*monsters))
 	}
 }