Added an app directory and a config file.

We now also download the image for notifications if a local copy cannot
be found.
Also ensure that we are using Unix line endings and not DOS ones.

main.go

@@ -1,8 +1,13 @@
 package main
 
 import (
+	"errors"
 	"fmt"
+	"io"
+	"net/http"
+	"os"
 	"os/exec"
+	"runtime"
 	"strings"
 	"time"
 
@@ -12,30 +17,97 @@ import (
 	"github.com/gen2brain/beeep"
 	"github.com/getlantern/systray"
 	ge "github.com/ronaldr1985/graceful-exit"
+	"gopkg.in/yaml.v3"
 )
 
 const (
-	TIME_INBETWEEN_NOTIFICATIONS = 20 * time.Minute
+	DEFAULT_TIME_INBETWEEN_NOTIFICATIONS = 20 * time.Minute
+	EYE_REMINDER_ICON_URL                = "https://gitea.ronald1985.uk/ronald1985/Eye-Reminder/raw/branch/master/assets/Eye-Reminder-Icon.png"
 )
 
+type Config struct {
+	Interval      int `yaml:"Interval"`
+	imageLocation string
+}
+
+var (
+	DEFAULT_UNIX_DIRECTORY    = os.Getenv("HOME") + "/.config/Eye-Reminder/"
+	DEFAULT_WINDOWS_DIRECTORY = os.Getenv("LOCALAPPDATA") + "/Eye-Reminder/"
+	ProgramConfig             Config
+)
+
+func print_fatal_error(err ...string) {
+	fmt.Fprintln(os.Stderr, err)
+	os.Exit(1)
+}
+
+func ReadConfig(filename string) (Config, error) {
+	config := &Config{}
+
+	bytes, err := os.ReadFile(filename)
+	if err != nil {
+		return *config, err
+	}
+
+	err = yaml.Unmarshal(bytes, config)
+	if err != nil {
+		return *config, fmt.Errorf("in file %q: %w", filename, err)
+	}
+
+	return *config, err
+}
+
+func CheckIfFileExists(filename string) (bool, error) {
+	if _, err := os.Stat(filename); err == nil {
+		return true, nil
+	} else if errors.Is(err, os.ErrNotExist) {
+		return false, nil
+	} else {
+		return false, err
+	}
+}
+
+func DownloadFile(filename, url string) bool {
+	out, err := os.Create(filename)
+	if err != nil {
+		return false
+	}
+	defer out.Close()
+
+	resp, err := http.Get(url)
+	if err != nil {
+		out.Close()
+		os.Remove(filename)
+		return false
+	}
+	defer resp.Body.Close()
+
+	_, err = io.Copy(out, resp.Body)
+	if err != nil {
+		return false
+	}
+
+	return true
+}
+
 func SendNotification(title string, message string) bool {
 	path, err := exec.LookPath("herbe")
 	if err == nil {
 		var args []string
 		args = append(args, title, message)
 		cmd := exec.Command(path, args...)
-		out, err := cmd.CombinedOutput()
-		if out == nil && err == nil {
-			return true
+		err := cmd.Start()
+		if err != nil {
+			return false
 		}
 	} else if strings.Contains(err.Error(), "executable file not found in ") {
 		err := beeep.Notify(title, message, "assets/Eye-Reminder-Icon.png")
 		if err != nil {
-			panic(err)
+			return false
 		}
 	}
 
-	return false
+	return true
 }
 
 func systrayOnReady() {
@@ -53,10 +125,12 @@ func systrayOnReady() {
 	}()
 
 	go func() {
-		lastTimeNotificationWasSent := time.Now().Add(-20 * time.Minute)
+		lastTimeNotificationWasSent := time.Now().Add(time.Duration(-ProgramConfig.Interval) * time.Minute)
 
 		for {
-			if enabled && time.Since(lastTimeNotificationWasSent) > TIME_INBETWEEN_NOTIFICATIONS {
+			if enabled && time.Since(lastTimeNotificationWasSent) > time.Duration(ProgramConfig.Interval) {
+				fmt.Println("Sending notification")
+
 				SendNotification("Eye Reminder", "Look away for the screen for atleast 20 seconds")
 
 				lastTimeNotificationWasSent = time.Now()
@@ -92,6 +166,77 @@ func systrayOnReady() {
 func main() {
 	ge.HandleSignals(false)
 
+	var possibleConfigFileLocations []string
+	possibleConfigFileLocations = append(possibleConfigFileLocations, os.Getenv("HOME")+"/.config/Eye-Reminder/config.yaml")
+	possibleConfigFileLocations = append(possibleConfigFileLocations, os.Getenv("HOME")+"/.config/Eye-Reminder/config.yml")
+	possibleConfigFileLocations = append(possibleConfigFileLocations, os.Getenv("XDG_CONFIG_HOME")+"/Eye-Reminder/config.yaml")
+	possibleConfigFileLocations = append(possibleConfigFileLocations, os.Getenv("XDG_CONFIG_HOME")+"/Eye-Reminder/config.yml")
+	possibleConfigFileLocations = append(possibleConfigFileLocations, os.Getenv("LOCALAPPDATA")+"/Eye-Reminder/config.yml")
+	possibleConfigFileLocations = append(possibleConfigFileLocations, os.Getenv("LOCALAPPDATA")+"/Eye-Reminder/config.yml")
+
+	configFileLocation := "not found"
+
+	for _, file := range possibleConfigFileLocations {
+		if fileExists, err := CheckIfFileExists(file); fileExists {
+			configFileLocation = file
+			break
+		} else if err != nil {
+			fmt.Fprintln(os.Stderr, "Error checking for config file:", err)
+		}
+	}
+
+	var err error
+	appDirectory := "not found"
+	if configFileLocation == "not found" {
+		ProgramConfig.Interval = int(DEFAULT_TIME_INBETWEEN_NOTIFICATIONS)
+
+		var possibleAppDirectoryLocations []string
+		possibleAppDirectoryLocations = append(possibleAppDirectoryLocations, os.Getenv("HOME")+"/.config/Eye-Reminder/")
+		possibleAppDirectoryLocations = append(possibleAppDirectoryLocations, os.Getenv("HOME")+"/.config/Eye-Reminder/")
+		possibleAppDirectoryLocations = append(possibleAppDirectoryLocations, os.Getenv("XDG_CONFIG_HOME")+"/Eye-Reminder/")
+		possibleAppDirectoryLocations = append(possibleAppDirectoryLocations, os.Getenv("XDG_CONFIG_HOME")+"/Eye-Reminder/")
+		possibleAppDirectoryLocations = append(possibleAppDirectoryLocations, os.Getenv("LOCALAPPDATA")+"/Eye-Reminder/")
+		possibleAppDirectoryLocations = append(possibleAppDirectoryLocations, os.Getenv("LOCALAPPDATA")+"/Eye-Reminder/")
+
+		for _, folder := range possibleAppDirectoryLocations {
+			if _, err := os.Stat(folder); !os.IsNotExist(err) {
+				appDirectory = folder
+				break
+			}
+		}
+
+		if appDirectory == "not found" {
+			if runtime.GOOS == "windows" {
+				appDirectory = DEFAULT_WINDOWS_DIRECTORY
+			} else {
+				appDirectory = DEFAULT_UNIX_DIRECTORY
+			}
+
+			fmt.Println("Creating config directory:", appDirectory)
+			err := os.Mkdir(appDirectory, 0755)
+			fmt.Println("Created folder:", appDirectory)
+			if err != nil {
+				panic(err)
+			}
+		}
+
+	} else {
+		appDirectory = configFileLocation[:strings.IndexByte(configFileLocation, '/')+1]
+		ProgramConfig, err = ReadConfig(configFileLocation)
+		if err != nil {
+			panic(err)
+		}
+	}
+
+	ProgramConfig.imageLocation = appDirectory + "Eye-Reminder-Icon.png"
+	if fileExists, err := CheckIfFileExists(ProgramConfig.imageLocation); !fileExists && err == nil {
+		fmt.Println("Downloading icon")
+		DownloadFile(ProgramConfig.imageLocation, EYE_REMINDER_ICON_URL)
+		fmt.Println("Downloaded icon")
+	} else if err != nil {
+		print_fatal_error("Failed to check if ", ProgramConfig.imageLocation, " exists.")
+	}
+
 	systrayOnExit := func() {
 	}
 	systray.Run(systrayOnReady, systrayOnExit)