Second commit

README.md

@@ -1,3 +1,7 @@
 # go-hyperfocus
 
+> Work-In-Progress: Do not use this software. It doesn't work yet. I haven't even compiled it once, so there are likely to be logic errors, and some features aren't fully implemented.
+
 Block distracting websites and hyperfocus on your tasks!
+
+This is a Go implementation of the Python-written [concentration](https://github.com/timothycrosley/concentration) program. This program aims to be memory-efficient and to allow the user somewhat more freedom in defining distractors than its predecessor.

go.mod

@@ -0,0 +1,5 @@
+module git.envs.net/hyperreal/go-hyperfocus
+
+go 1.17
+
+require github.com/akamensky/argparse v1.3.1

go.sum

@@ -0,0 +1,2 @@
+github.com/akamensky/argparse v1.3.1 h1:kP6+OyvR0fuBH6UhbE6yh/nskrDEIQgEA1SUXDPjx4g=
+github.com/akamensky/argparse v1.3.1/go.mod h1:S5kwC7IuDcEr5VeXtGPRVZ5o/FdhcMlQz4IZQuw64xA=

main.go

@@ -0,0 +1,247 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"os/exec"
+	"os/signal"
+	"os/user"
+	"runtime"
+	"strings"
+	"time"
+
+	"github.com/akamensky/argparse"
+)
+
+const (
+	redirectTo = "127.0.0.1"
+	marker     = "## MANAGED BY HYPERFOCUS ##\n"
+	runningOS  = runtime.GOOS
+)
+
+var distractorsFile string = os.Getenv("HOME") + ".hyperfocus_distractors"
+
+func getHostFile() string {
+
+	var hostFile string
+	switch runningOS {
+	case "windows":
+		hostFile = "/Windows/System32/drivers/etc/hosts"
+
+	default:
+		hostFile = "/etc/hosts"
+	}
+
+	return hostFile
+}
+
+func resetNetwork(message string) {
+
+	switch runningOS {
+	case "windows":
+		cmd := exec.Command("ipconfig /flushdns")
+		if err := cmd.Run(); err != nil {
+			log.Fatalln(err)
+		}
+
+		fmt.Println(message)
+
+	case "darwin":
+		cmd := exec.Command("dscacheutil", "-flushcache")
+		if err := cmd.Run(); err != nil {
+			log.Fatalln(err)
+		}
+
+		fmt.Println(message)
+
+	case "linux":
+
+		var (
+			usingDnsmasq  bool = false
+			usingResolved bool = false
+		)
+
+		// Detect if using dnsmasq
+		out, err := exec.Command("systemctl", "is-active", "dnsmasq").Output()
+		if err != nil {
+			log.Fatalln(err)
+		}
+
+		if string(out) == "active" {
+			usingDnsmasq = true
+		}
+
+		// Detect if using systemd-resolved
+		out, err = exec.Command("systemctl", "is-active", "systemd-resolved").Output()
+		if err != nil {
+			log.Fatalln(err)
+		}
+
+		if string(out) == "active" {
+			usingResolved = true
+		}
+
+		// Restart networking service
+		if usingDnsmasq {
+			cmd := exec.Command("systemctl", "restart", "dnsmasq")
+			if err := cmd.Run(); err != nil {
+				log.Fatalln(err)
+			}
+		}
+
+		if usingResolved {
+			cmd := exec.Command("resolvectl", "flush-caches")
+			if err := cmd.Run(); err != nil {
+				log.Fatalln(err)
+			}
+		}
+
+		fmt.Println(message)
+	}
+}
+
+func isRoot() bool {
+
+	currUser, err := user.Current()
+	if err != nil {
+		log.Fatalf("[Super user check] Unable to get current user: %s\n", err)
+	}
+
+	return currUser.Username == "root"
+}
+
+// Disables access to websites that are defined as 'distractors'
+func improveFocus() {
+
+	hostFile, err := os.OpenFile(getHostFile(), os.O_APPEND|os.O_WRONLY, 0666)
+	if err != nil {
+		log.Fatalln(err)
+	}
+	defer hostFile.Close()
+
+	userDistractorsFile, err := os.Open(distractorsFile)
+	if err != nil {
+		log.Fatalln(err)
+	}
+	defer userDistractorsFile.Close()
+
+	if _, err := hostFile.WriteString(marker); err != nil {
+		log.Fatalln(err)
+	}
+
+	scanner := bufio.NewScanner(userDistractorsFile)
+	for scanner.Scan() {
+		var hostLine string = fmt.Sprintf("127.0.0.1\t%s\n", scanner.Text())
+		if _, err := hostFile.WriteString(hostLine); err != nil {
+			log.Fatalln(err)
+		}
+	}
+
+	if _, err := hostFile.WriteString(marker); err != nil {
+		log.Fatalln(err)
+	}
+
+	resetNetwork("Focus is now improved 😊")
+}
+
+// Enables access to websites that are defined as 'distractors'
+func loseFocus() {
+
+	hostFileContent, err := ioutil.ReadFile(getHostFile())
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	hostFileSlice := strings.Split(string(hostFileContent), marker)
+	hostFileSlice = append(hostFileSlice[:1], hostFileSlice[2:]...)
+	hostFileBytes := []byte(strings.Join(hostFileSlice, ""))
+
+	if err := ioutil.WriteFile(getHostFile(), hostFileBytes, 0666); err != nil {
+		log.Fatalln(err)
+	}
+
+	resetNetwork("Focus is now lost 🤪")
+}
+
+// Enables temporarily breaking concentration
+func takeBreak(minutes int) {
+
+	fmt.Println()
+	fmt.Println("Your (probably) well-deserved break is commencing...")
+	loseFocus()
+
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt)
+
+	s := <-c
+	t := minutes * 60
+	for i := t; i > 0; i-- {
+		fmt.Printf("%d seconds remaining", i)
+		time.Sleep(time.Second)
+
+		if s == os.Interrupt {
+			break
+		}
+	}
+
+	improveFocus()
+	fmt.Println("Welcome back to hyperfocus mode 😊 ")
+}
+
+// Prints the current list of distractors to be blocked
+func listDistractors() {
+
+	userDistractorsFile, err := os.Open(distractorsFile)
+	if err != nil {
+		log.Fatalln(err)
+	}
+	defer userDistractorsFile.Close()
+
+	scanner := bufio.NewScanner(userDistractorsFile)
+
+	for scanner.Scan() {
+		fmt.Println(scanner.Text())
+	}
+}
+
+// Adds predefined distractors to .hyperfocus_distractors file
+func addPredefinedDistractors() {
+
+}
+
+func main() {
+
+	parser := argparse.NewParser("hf", "Block distracting websites and hyperfocus on your work")
+
+	improveCmd := parser.NewCommand("improve", "Improve focus, block the distractors")
+	loseCmd := parser.NewCommand("lose", "Lose focus, unblock the distractors")
+
+	breakCmd := parser.NewCommand("break", "Take a break for a number of minutes")
+	minutesForBreak := breakCmd.Int("", "minutes", &argparse.Options{Help: "Number of minutes to break for."})
+
+	listCmd := parser.NewCommand("list", "List the distractors defined in the block file (~/.hyperfocus_distractors)")
+	predefinedCmd := parser.NewCommand("predefined", "Add predefined set of distractors to block file")
+
+	err := parser.Parse(os.Args)
+	if err != nil {
+		fmt.Print(parser.Usage(err))
+	}
+
+	if improveCmd.Happened() {
+		improveFocus()
+	} else if loseCmd.Happened() {
+		loseFocus()
+	} else if breakCmd.Happened() {
+		takeBreak(*minutesForBreak)
+	} else if listCmd.Happened() {
+		listDistractors()
+	} else if predefinedCmd.Happened() {
+		addPredefinedDistractors()
+	} else {
+		log.Fatalln("Unknown command")
+	}
+
+}