Initial support for desktop notifications

v2/pkg/mac/notification_darwin.go

@@ -0,0 +1,30 @@
+// Package mac provides MacOS related utility functions for Wails applications
+package mac
+
+import (
+	"fmt"
+
+	"github.com/pkg/errors"
+	"github.com/wailsapp/wails/v2/internal/shell"
+)
+
+// StartAtLogin will either add or remove this application to/from the login
+// items, depending on the given boolean flag. The limitation is that the
+// currently running app must be in an app bundle.
+func ShowNotification(title string, subtitle string, message string, sound string) error {
+	command := fmt.Sprintf("display notification \"%s\"", message)
+	if len(title) > 0 {
+		command += fmt.Sprintf(" with title \"%s\"", title)
+	}
+	if len(subtitle) > 0 {
+		command += fmt.Sprintf(" subtitle \"%s\"", subtitle)
+	}
+	if len(sound) > 0 {
+		command += fmt.Sprintf(" sound name \"%s\"", sound)
+	}
+	_, stde, err := shell.RunCommand("/tmp", "osascript", "-e", command)
+	if err != nil {
+		errors.Wrap(err, stde)
+	}
+	return nil
+}

v2/pkg/mac/notification_darwin_test.go

@@ -0,0 +1,34 @@
+package mac
+
+import "testing"
+
+func TestShowNotification(t *testing.T) {
+	type args struct {
+		title    string
+		subtitle string
+		message  string
+		sound    string
+	}
+	tests := []struct {
+		name     string
+		title    string
+		subtitle string
+		message  string
+		sound    string
+		wantErr  bool
+	}{
+		{"No message", "", "", "", "", false},
+		{"Title only", "I am a Title", "", "", "", false},
+		{"SubTitle only", "", "I am a subtitle", "", "", false},
+		{"Message only", "", "", "I am a message!", "", false},
+		{"Sound only", "", "", "", "submarine.aiff", false},
+		{"Full", "Title", "Subtitle", "This is a long message to show that text gets wrapped in a notification", "submarine.aiff", false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if err := ShowNotification(tt.title, tt.subtitle, tt.message, tt.sound); (err != nil) != tt.wantErr {
+				t.Errorf("ShowNotification() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}