1 files changed, 21 insertions, 0 deletions
diff --git a/cmd/web/helpers.go b/cmd/web/helpers.go
index 5f7e4d3..fc9b8f8 100644
--- a/cmd/web/helpers.go
+++ b/cmd/web/helpers.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"log"
 	"net/http"
 	"runtime/debug"
@@ -29,3 +30,23 @@ func (app *application) clientError(w http.ResponseWriter, status int) {
 func (app *application) notFound(w http.ResponseWriter) {
 	app.clientError(w, http.StatusNotFound)
 }
+
+func (app *application) render(w http.ResponseWriter, r *http.Request, status int, page string, data templateData) {
+	// retrieve the appropriate template set from the cache based on the page name.
+	// If no entry exists in the cache with the provided name, create a new error
+	// and call serverError() helper that we made earlier and return.
+	ts, ok := app.templateCache[page]
+	if !ok {
+		err := fmt.Errorf("the template %s does not exist", page)
+		app.serverError(w, r, err)
+		return
+	}
+
+	// Write out the provided HTTP status code('200 OK', '400 Bad Request', etc).
+	w.WriteHeader(status)
+
+	err := ts.ExecuteTemplate(w, "base", data)
+	if err != nil {
+		app.serverError(w, r, err)
+	}
+}