lets-go:9.3 sessions

snippetbox/cmd/web/handlers.go

@@ -97,5 +97,7 @@ func (app *application) snippetCreatePost(w http.ResponseWriter, r *http.Request
 		return
 	}
 
+	app.sessionManager.Put(r.Context(), "flash", "Snippet successfully created!")
+
 	http.Redirect(w, r, fmt.Sprintf("/snippet/view/%d", id), http.StatusSeeOther)
 }

snippetbox/cmd/web/helpers.go

@@ -16,6 +16,7 @@ import (
 func (app *application )newTemplateData(r *http.Request) templateData {
 	return templateData{
 		CurrentYear: time.Now().Year(),
+		Flash: app.sessionManager.PopString(r.Context(), "flash"),
 	}
 
 }

snippetbox/cmd/web/templates.go

@@ -13,6 +13,7 @@ type templateData struct {
 	Snippet     models.Snippet
 	Snippets    []models.Snippet
 	Form        any
+	Flash       string
 }
 
 // humanDate ...

snippetbox/ui/html/base.tmpl

@@ -14,6 +14,9 @@
     </header>
     {{template "nav" .}}
     <main>
+      {{with .Flash}}
+        <div class="flash">{{.}}</div>
+      {{end}}
       {{template "main" .}}
     </main>
     <footer>