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package notificator
import (
"fmt"
"os/exec"
"runtime"
"strconv"
"strings"
)
type Options struct {
DefaultIcon string
AppName string
}
const (
UR_NORMAL = "normal"
UR_CRITICAL = "critical"
)
type notifier interface {
push(title string, text string, iconPath string) *exec.Cmd
pushCritical(title string, text string, iconPath string) *exec.Cmd
}
type Notificator struct {
notifier notifier
defaultIcon string
}
func (n Notificator) Push(title string, text string, iconPath string, urgency string) error {
icon := n.defaultIcon
if iconPath != "" {
icon = iconPath
}
if urgency == UR_CRITICAL {
return n.notifier.pushCritical(title, text, icon).Run()
}
return n.notifier.push(title, text, icon).Run()
}
type osxNotificator struct {
AppName string
}
func (o osxNotificator) push(title string, text string, iconPath string) *exec.Cmd {
// Checks if terminal-notifier exists, and is accessible.
// if terminal-notifier exists, use it.
// else, fall back to osascript. (Mavericks and later.)
if CheckTermNotif() {
return exec.Command("terminal-notifier", "-title", o.AppName, "-message", text, "-subtitle", title, "-appIcon", iconPath)
} else if CheckMacOSVersion() {
title = strings.Replace(title, `"`, `\"`, -1)
text = strings.Replace(text, `"`, `\"`, -1)
notification := fmt.Sprintf("display notification \"%s\" with title \"%s\" subtitle \"%s\"", text, o.AppName, title)
return exec.Command("osascript", "-e", notification)
}
// finally falls back to growlnotify.
return exec.Command("growlnotify", "-n", o.AppName, "--image", iconPath, "-m", title)
}
// Causes the notification to stick around until clicked.
func (o osxNotificator) pushCritical(title string, text string, iconPath string) *exec.Cmd {
// same function as above...
if CheckTermNotif() {
// timeout set to 30 seconds, to show the importance of the notification
return exec.Command("terminal-notifier", "-title", o.AppName, "-message", text, "-subtitle", title, "-timeout", "30")
} else if CheckMacOSVersion() {
notification := fmt.Sprintf("display notification \"%s\" with title \"%s\" subtitle \"%s\"", text, o.AppName, title)
return exec.Command("osascript", "-e", notification)
}
return exec.Command("growlnotify", "-n", o.AppName, "--image", iconPath, "-m", title)
}
type linuxNotificator struct {
AppName string
}
func (l linuxNotificator) push(title string, text string, iconPath string) *exec.Cmd {
return exec.Command("notify-send", "-i", iconPath, title, text, "-a", l.AppName)
}
// Causes the notification to stick around until clicked.
func (l linuxNotificator) pushCritical(title string, text string, iconPath string) *exec.Cmd {
return exec.Command("notify-send", "-i", iconPath, title, text, "-a", l.AppName, "-u", "critical")
}
type windowsNotificator struct{}
func (w windowsNotificator) push(title string, text string, iconPath string) *exec.Cmd {
return exec.Command("growlnotify", "/i:", iconPath, "/t:", title, text)
}
// Causes the notification to stick around until clicked.
func (w windowsNotificator) pushCritical(title string, text string, iconPath string) *exec.Cmd {
return exec.Command("growlnotify", "/i:", iconPath, "/t:", title, text, "/s", "true", "/p", "2")
}
func New(o Options) *Notificator {
var Notifier notifier
switch runtime.GOOS {
case "darwin":
Notifier = osxNotificator{AppName: o.AppName}
case "linux":
Notifier = linuxNotificator{AppName: o.AppName}
case "windows":
Notifier = windowsNotificator{}
}
return &Notificator{notifier: Notifier, defaultIcon: o.DefaultIcon}
}
// Helper function for macOS
func CheckTermNotif() bool {
// Checks if terminal-notifier exists, and is accessible.
if err := exec.Command("which", "terminal-notifier").Run(); err != nil {
return false
}
// no error, so return true. (terminal-notifier exists)
return true
}
func CheckMacOSVersion() bool {
// Checks if the version of macOS is 10.9 or Higher (osascript support for notifications.)
cmd := exec.Command("sw_vers", "-productVersion")
check, _ := cmd.Output()
version := strings.Split(strings.TrimSpace(string(check)), ".")
// semantic versioning of macOS
major, _ := strconv.Atoi(version[0])
minor, _ := strconv.Atoi(version[1])
if major < 10 {
return false
} else if major == 10 && minor < 9 {
return false
} else {
return true
}
}
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