Sending background emails.

cmd/api/helpers.go

@@ -4,13 +4,14 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"github.com/julienschmidt/httprouter"
-	"greenlight.craftr.fr/internal/validator"
 	"io"
 	"net/http"
 	"net/url"
 	"strconv"
 	"strings"
+
+	"github.com/julienschmidt/httprouter"
+	"greenlight.craftr.fr/internal/validator"
 )
 
 /*
@@ -204,3 +205,19 @@ func (app *application) readInt(qs url.Values, key string, defaultValue int, v *
 	// Otherwise, return the converted integer value
 	return i
 }
+
+// Background: accepts an arbitrary function as a parameter
+func (app *application) background(fn func()) {
+	// Launch a background goroutine
+	go func() {
+		// recover any panic.
+		defer func() {
+			if err := recover(); err != nil {
+				app.logger.Error("%v", err)
+			}
+		}()
+
+		// Execute the arbitrary function that we passed as the parameter
+		fn()
+	}()
+}