cross compatibility

Clear is a cross platform function that, as its name implies, clears the terminal/command prompt.
Fixed issue related to sending edit requests even if pms is unavailable

.gitignore

@@ -6,3 +6,6 @@
 
 # Output
 /bin
+
+# Lib
+/lib

README.md

@@ -1,2 +1,25 @@
 # wyst-package-manager
  A package manager for the programming language Wyst
+
+
+## Usage:
+
+### Installing packages (version is optional)
+```console
+wpm install <package>[:version]   
+```
+
+### Version
+```console
+wpm version
+```
+
+### Help
+```console
+wpm help
+```
+### Obtaining information from a package
+```console
+wpm info <package>
+```
+

go.mod

@@ -1,3 +1,8 @@
-module github.com/RudideC/wyst-package-manager
+module github.com/wyst-lang/wpm
 
 go 1.22.0
+
+require (
+	golang.org/x/sys v0.20.0 // indirect
+	golang.org/x/term v0.20.0 // direct
+)

go.sum

@@ -0,0 +1,4 @@
+golang.org/x/sys v0.20.0 h1:Od9JTbYCk261bKm4M/mw7AklTlFYIa0bIp9BgSm1S8Y=
+golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/term v0.20.0 h1:VnkxpohqXaOBYJtBmEppKUG6mXpi+4O6purfc2+sMhw=
+golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=

install-linux.sh

@@ -0,0 +1,4 @@
+sudo cp -rf . ~/wpm
+cd ~/wpm
+go build -o bin/wpm src/*.go
+sudo cp bin/wpm /usr/local/bin/

install-windows.bat

@@ -0,0 +1,16 @@
+@echo off
+cd %~dp0
+where go >nul 2>&1
+if %errorlevel% neq 0 (
+    echo please install go: https://go.dev/doc/install
+    start https://go.dev/doc/install
+    exit /b 1
+) else (
+    @echo off
+    xcopy /s /e /i /h /y . "%USERPROFILE%\wpm"
+    cd /d "%USERPROFILE%\wpm\src"
+    go build -o ..\wpm.exe
+    copy ..\wpm.exe C:\Windows\System32
+)
+
+pause

src/actions.go

@@ -0,0 +1,149 @@
+package main
+
+import (
+	"fmt"
+	"net/http"
+	"strings"
+)
+
+// const URL = "http://localhost:3000"
+const URL = "https://pms-xdib.onrender.com"
+
+func showHelp() {
+	fmt.Println("wpm - Wyst Package Manager")
+	fmt.Println("Commands:")
+	fmt.Println("  install <package>[:version] - Install a package (version is optional)")
+	fmt.Println("  create <package> - Create a package")
+	fmt.Println("  edit <package> - Edit a package")
+	fmt.Println("  delete <package> - Delete a package")
+	fmt.Println("  version - Show the wpm version")
+	fmt.Println("  help - Show this help message")
+	fmt.Println("  info <package> - Show package information (author, description, versions)")
+}
+
+func parsePackageArg(arg string) (string, string) {
+	parts := strings.Split(arg, ":")
+	if len(parts) == 2 {
+		return parts[0], parts[1]
+	}
+	return parts[0], ""
+}
+
+func createPackage(packageName string) {
+	var psw string
+	var pswV string
+	var repo string
+	var version string
+	fmt.Printf("Enter the password for %s: ", packageName)
+	ReadPassword(&psw)
+	fmt.Printf("Verify the password for %s: ", packageName)
+	ReadPassword(&pswV)
+	if psw != pswV {
+		fmt.Printf("Passwords do not match\n\r")
+		return
+	}
+	fmt.Printf("Enter the repo for %s: ", packageName)
+	fmt.Scanln(&repo)
+	fmt.Printf("Enter the latest version for %s: ", packageName)
+	fmt.Scanln(&version)
+	fmt.Println()
+	jsonBody := []byte(fmt.Sprintf(`{"name": "%v", "psw": "%v", "repo": "%v", "latest": "%v"}`, packageName, psw, repo, version))
+	req, err := sendRequest(http.MethodPost, URL, jsonBody)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	err = getMessage(req)
+	if err != nil {
+		fmt.Printf("Error: %v\n\r", err)
+		return
+	} else {
+		fmt.Printf("Done\n\r")
+	}
+}
+
+func editPackage(packageName string) {
+	pkgidx, err := getPackage(packageName)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	var psw string
+	var repo string = pkgidx.Repo
+	var version string = pkgidx.Latest
+	var newPsw string
+	var newPackageName string = packageName
+
+	fmt.Printf("\rEnter the password for %s: ", packageName)
+	ReadPassword(&psw)
+	newPsw = psw
+
+	for true {
+		clear()
+		fmt.Printf("Choose what you want to modify\n\r")
+		fmt.Printf("  1 -> package name  : %s\n\r", newPackageName)
+		fmt.Printf("  2 -> password      : %s\n\r", newPsw)
+		fmt.Printf("  3 -> repo          : %s\n\r", repo)
+		fmt.Printf("  4 -> latest version: %s\n\r", version)
+		fmt.Printf("Type in 'quit'/'q'/'exit' to discard your changes\n\r")
+		fmt.Printf("Type in anything else to confirm your changes\n\r")
+		var option string
+		fmt.Print("\n> ")
+		fmt.Scanln(&option)
+		switch option {
+		case "1":
+			fmt.Printf("Enter the new name for for %s: ", packageName)
+			fmt.Scanln(&newPackageName)
+		case "2":
+			fmt.Printf("Enter the new password for %s: ", packageName)
+			ReadPassword(&newPsw)
+		case "3":
+			fmt.Printf("Enter the repo for %s: ", packageName)
+			fmt.Scanln(&repo)
+		case "4":
+			fmt.Printf("Enter the latest version for %s: ", packageName)
+			fmt.Scanln(&version)
+		case "q":
+			return
+		case "quit":
+			return
+		case "exit":
+			return
+		default:
+			jsonBody := []byte(fmt.Sprintf(`{ "new": {"name": "%v", "psw": "%v", "latest": "%v", "repo": "%v"}, "name": "%v", "psw": "%v"}`, newPackageName, newPsw, version, repo, packageName, psw))
+			req, err := sendRequest(http.MethodPut, URL, jsonBody)
+			if err != nil {
+				fmt.Printf("Error while editing %s: %v", packageName, err)
+				return
+			}
+			err = getMessage(req)
+			if err != nil {
+				fmt.Printf("Error: %v\n\r", err)
+				return
+			} else {
+				fmt.Printf("Done\n\r")
+			}
+			return
+		}
+
+	}
+}
+
+func deletePackage(packageName string) {
+	fmt.Printf("Enter the password for %s: ", packageName)
+	var psw string
+	ReadPassword(&psw)
+	jsonBody := []byte(fmt.Sprintf(`{"name": "%s", "psw": "%v"}`, packageName, psw))
+	req, err := sendRequest(http.MethodDelete, URL, jsonBody)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+	err = getMessage(req)
+	if err != nil {
+		fmt.Printf("Error: %v\n\r", err)
+		return
+	} else {
+		fmt.Printf("Done\n\r")
+	}
+}

src/commands.go

@@ -1,23 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"strings"
-)
-
-func showHelp() {
-	fmt.Println("wpm - Wyst Package Manager")
-	fmt.Println("Commands:")
-	fmt.Println("  install <package>[:version] - Install a package (version is optional)")
-	fmt.Println("  version - Show the wpm version")
-	fmt.Println("  help - Show this help message")
-	fmt.Println("  info <package> - Show package information (author, description, versions)")
-}
-
-func parsePackageArg(arg string) (string, string) {
-	parts := strings.Split(arg, ":")
-	if len(parts) == 2 {
-		return parts[0], parts[1]
-	}
-	return parts[0], ""
-}

src/fetcher.go

@@ -0,0 +1,80 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+)
+
+type Request struct {
+	Body       []byte
+	StatusCode int
+}
+
+type Package struct {
+	Author      string `json:"author"`
+	Description string `json:"description"`
+	URL         string `json:"url"`
+}
+
+type PackageIndex struct {
+	Name    string `json:"name"`
+	Repo    string `json:"repo"`
+	Latest  string `json:"latest"`
+	Message string `json:"message"`
+}
+
+type Message struct {
+	Message string `json:"message"`
+}
+
+func sendRequest(method, url string, jsonBody []byte) (Request, error) {
+	bodyReader := bytes.NewReader(jsonBody)
+	req, err := http.NewRequest(method, url, bodyReader)
+	if err != nil {
+		return Request{Body: []byte(""), StatusCode: 400}, err
+	}
+	req.Header.Set("Content-Type", "application/json")
+	res, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return Request{Body: []byte(""), StatusCode: 400}, err
+	}
+	defer res.Body.Close()
+	resBody, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		return Request{Body: []byte(""), StatusCode: 400}, err
+	}
+	return Request{Body: resBody, StatusCode: res.StatusCode}, nil
+}
+
+func getPackage(packageName string) (PackageIndex, error) {
+	var pkgidx PackageIndex
+	jsonBody := []byte(fmt.Sprintf(`{"name": "%s"}`, packageName))
+	req, err := sendRequest(http.MethodGet, URL, jsonBody)
+	if err != nil {
+		fmt.Printf("Fetching error: %s\n", err)
+	}
+	err = json.Unmarshal(req.Body, &pkgidx)
+	if err != nil {
+		fmt.Println("Json Error: ", err)
+		return pkgidx, err
+	}
+	if req.StatusCode != 200 {
+		return pkgidx, fmt.Errorf(pkgidx.Message)
+	}
+	return pkgidx, nil
+}
+
+func getMessage(req Request) error {
+	var msg Message
+	err := json.Unmarshal(req.Body, &msg)
+	if err != nil {
+		return fmt.Errorf("JsonError: %v", err)
+	}
+	if msg.Message != "ok" {
+		return fmt.Errorf(msg.Message)
+	}
+	return nil
+}

src/gh.go

@@ -0,0 +1,140 @@
+package main
+
+import (
+	"archive/zip"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+type Author struct {
+	Login             string `json:"login"`
+	ID                int    `json:"id"`
+	NodeID            string `json:"node_id"`
+	AvatarURL         string `json:"avatar_url"`
+	GravatarID        string `json:"gravatar_id"`
+	URL               string `json:"url"`
+	HTMLURL           string `json:"html_url"`
+	FollowersURL      string `json:"followers_url"`
+	FollowingURL      string `json:"following_url"`
+	GistsURL          string `json:"gists_url"`
+	StarredURL        string `json:"starred_url"`
+	SubscriptionsURL  string `json:"subscriptions_url"`
+	OrganizationsURL  string `json:"organizations_url"`
+	ReposURL          string `json:"repos_url"`
+	EventsURL         string `json:"events_url"`
+	ReceivedEventsURL string `json:"received_events_url"`
+	Type              string `json:"type"`
+	SiteAdmin         bool   `json:"site_admin"`
+}
+
+// Define a struct for the Release
+type Release struct {
+	URL             string        `json:"url"`
+	AssetsURL       string        `json:"assets_url"`
+	UploadURL       string        `json:"upload_url"`
+	HTMLURL         string        `json:"html_url"`
+	ID              int           `json:"id"`
+	Author          Author        `json:"author"`
+	NodeID          string        `json:"node_id"`
+	TagName         string        `json:"tag_name"`
+	TargetCommitish string        `json:"target_commitish"`
+	Name            string        `json:"name"`
+	Draft           bool          `json:"draft"`
+	Prerelease      bool          `json:"prerelease"`
+	CreatedAt       string        `json:"created_at"`
+	PublishedAt     string        `json:"published_at"`
+	Assets          []interface{} `json:"assets"` // Assuming assets is an array of unknown types
+	TarballURL      string        `json:"tarball_url"`
+	ZipballURL      string        `json:"zipball_url"`
+	Body            string        `json:"body"`
+}
+
+func Unzip(src, dest string) error {
+	r, err := zip.OpenReader(src)
+	if err != nil {
+		return err
+	}
+	defer func() {
+		if err := r.Close(); err != nil {
+			panic(err)
+		}
+	}()
+
+	os.MkdirAll(dest, 0755)
+
+	// Closure to address file descriptors issue with all the deferred .Close() methods
+	extractAndWriteFile := func(f *zip.File) error {
+		rc, err := f.Open()
+		if err != nil {
+			return err
+		}
+		defer func() {
+			if err := rc.Close(); err != nil {
+				panic(err)
+			}
+		}()
+
+		path := filepath.Join(dest, f.Name)
+
+		// Check for ZipSlip (Directory traversal)
+		if !strings.HasPrefix(path, filepath.Clean(dest)+string(os.PathSeparator)) {
+			return fmt.Errorf("illegal file path: %s", path)
+		}
+
+		if f.FileInfo().IsDir() {
+			os.MkdirAll(path, f.Mode())
+		} else {
+			os.MkdirAll(filepath.Dir(path), f.Mode())
+			f, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
+			if err != nil {
+				return err
+			}
+			defer func() {
+				if err := f.Close(); err != nil {
+					panic(err)
+				}
+			}()
+
+			_, err = io.Copy(f, rc)
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+	}
+
+	for _, f := range r.File {
+		err := extractAndWriteFile(f)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func downloadPackage(repoU, tag string) error {
+	resp, err := http.Get(fmt.Sprintf("https://github.com/%s/archive/refs/tags/%s.zip", strings.Trim(repoU, "/"), tag))
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	out, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		fmt.Println("Error reading body:", err)
+		return err
+	}
+
+	err = ioutil.WriteFile("temp.zip", out, 0644)
+	if err != nil {
+		fmt.Println("Error writing file:", err)
+		return err
+	}
+	return nil
+}

src/info.go

@@ -1,36 +1,36 @@
 package main
 
-import (
+import "fmt"
-	"encoding/json"
-	"fmt"
-	"net/http"
-)
 
 func showPackageInfo(packageName string) {
-	url := fmt.Sprintf("https://raw.githubusercontent.com/wyst-lang/index/master/%s/index.json", packageName)
+	progress := ProgressBar{total: 4, length: 20}
-	resp, err := http.Get(url)
+	progress.change(3, "", "Fetching")
+	pkgidx, err := getPackage(packageName)
 	if err != nil {
-		fmt.Printf("Error fetching package info: %v\n", err)
+		fmt.Printf("\nError getting repo URL: %v\n", err)
 		return
 	}
-	defer resp.Body.Close()
+	progress.clean()
 
-	if resp.StatusCode != http.StatusOK {
+	// indexURL, err := findIndexURL(repoURL)
-		fmt.Printf("Error: %s\n", resp.Status)
+	// if err != nil {
-		return
+	// 	fmt.Printf("Error finding index URL: %v\n", err)
-	}
+	// 	return
+	// }
 
-	var pkgIndex PackageIndex
+	// pkgIndex, err := fetchPackageIndex(indexURL)
-	if err := json.NewDecoder(resp.Body).Decode(&pkgIndex); err != nil {
+	// if err != nil {
-		fmt.Printf("Error decoding package info: %v\n", err)
+	// 	fmt.Printf("Error fetching package index: %v\n", err)
-		return
+	// 	return
-	}
+	// }
 
 	fmt.Printf("Package: %s\n", packageName)
-	for version, info := range pkgIndex.Versions {
+	fmt.Printf("Repo: %s\n", pkgidx.Repo)
-		fmt.Printf("Version: %s\n", version)
+	fmt.Printf("Version: %s\n", pkgidx.Latest)
-		fmt.Printf("  Author: %s\n", info.Author)
+	// for version, info := range pkgIndex.Versions {
-		fmt.Printf("  Description: %s\n", info.Description)
+	// fmt.Printf("Version: %s\n", version)
-		fmt.Println()
+	// fmt.Printf("  Author: %s\n", info.Author)
-	}
+	// fmt.Printf("  Description: %s\n", info.Description)
+	// fmt.Println()
+	// }
 }

src/install.go

@@ -1,98 +1,73 @@
 package main
 
 import (
-	"encoding/json"
 	"fmt"
-	"io"
+	"net/url"
-	"net/http"
 	"os"
-	"path/filepath"
+	"strings"
 )
 
+type RepoResponse struct {
+	Message string `json:"message"`
+	Name    string `json:"name"`
+	Repo    string `json:"repo"`
+}
+
 type PackageVersion struct {
 	Author      string `json:"author"`
 	Description string `json:"description"`
 	URL         string `json:"url"`
 }
 
-type PackageIndex struct {
-	Versions map[string]PackageVersion `json:"versions"`
-}
-
 func installPackage(packageName, packageVersion string) {
-	url := fmt.Sprintf("https://raw.githubusercontent.com/wyst-lang/index/master/%s/index.json", packageName)
+	progress := ProgressBar{total: 10, length: 20, enabled: true}
-	resp, err := http.Get(url)
+	progress.change(1, "", "Fetching")
+	pkgidx, err := getPackage(packageName)
 	if err != nil {
-		fmt.Printf("Error fetching package info: %v\n", err)
+		fmt.Printf("Error getting repo URL: %s\n", err)
 		return
 	}
-	defer resp.Body.Close()
+	repoU, err := url.Parse(pkgidx.Repo)
-
+	if err != nil {
-	if resp.StatusCode != http.StatusOK {
+		fmt.Printf("Error parsing repo URL: %s\n", err)
-		fmt.Printf("Error: %s\n", resp.Status)
-		return
 	}
-
-	var pkgIndex PackageIndex
-	if err := json.NewDecoder(resp.Body).Decode(&pkgIndex); err != nil {
-		fmt.Printf("Error decoding package info: %v\n", err)
-		return
-	}
-
 	if packageVersion == "" {
-		packageVersion = getLatestVersion(pkgIndex)
+		packageVersion = pkgidx.Latest
+		progress.change(3, "", fmt.Sprintf("Using version %s", packageVersion))
 	}
-
+	progress.change(6, "", "Downloading")
-	pkgVersion, exists := pkgIndex.Versions[packageVersion]
+	downloadPackage(repoU.Path, packageVersion)
-	if !exists {
+	if err := os.Mkdir("wyst_tmp", os.ModePerm); err != nil {
-		fmt.Printf("Version %s not found for package %s\n", packageVersion, packageName)
+		ERR := fmt.Sprintf("%s", err)
-		return
+		if !strings.Contains(strings.ToLower(ERR), "file exists") {
-	}
+			panic(ERR)
-
-	downloadAndSavePackage(pkgVersion.URL, packageName, packageVersion)
-}
-
-func getLatestVersion(pkgIndex PackageIndex) string {
-	var latest string
-	for version := range pkgIndex.Versions {
-		if version > latest {
-			latest = version
 		}
 	}
-	return latest
+	progress.change(9, "", "Extracting")
-}
+	Unzip("temp.zip", "wyst_tmp")
-
+	if err := os.RemoveAll("lib/" + packageName); err != nil {
-func downloadAndSavePackage(url, packageName, packageVersion string) {
+		panic(err)
-	resp, err := http.Get(url)
+	}
+	entries, err := os.ReadDir("./wyst_tmp")
 	if err != nil {
-		fmt.Printf("Error downloading package: %v\n", err)
+		panic(err)
-		return
 	}
-	defer resp.Body.Close()
+	if err := os.Mkdir("lib", os.ModePerm); err != nil {
-
+		ERR := fmt.Sprintf("%s", err)
-	if resp.StatusCode != http.StatusOK {
+		if !strings.Contains(strings.ToLower(ERR), "file exists") {
-		fmt.Printf("Error: %s\n", resp.Status)
+			panic(ERR)
-		return
 		}
-
-	libDir := "lib"
-	if err := os.MkdirAll(libDir, 0755); err != nil {
-		fmt.Printf("Error creating lib directory: %v\n", err)
-		return
 	}
-
+	for _, e := range entries {
-	filename := filepath.Base(url)
+		os.Rename("wyst_tmp/"+e.Name(), "lib/"+packageName)
-	packageFile := filepath.Join(libDir, filename)
-	out, err := os.Create(packageFile)
-	if err != nil {
-		fmt.Printf("Error creating package file: %v\n", err)
-		return
 	}
-	defer out.Close()
+	if err := os.RemoveAll("wyst_tmp"); err != nil {
-
+		panic(err)
-	if _, err := io.Copy(out, resp.Body); err != nil {
-		fmt.Printf("Error saving package: %v\n", err)
-	} else {
-		fmt.Printf("Package %s version %s downloaded and saved successfully as %s\n", packageName, packageVersion, filename)
 	}
+	if err := os.Remove("temp.zip"); err != nil {
+		panic(err)
+	}
+	progress.change(10, "", "Installed")
+	progress.clean()
+	fmt.Printf("%s %s Installed\n\n", packageName, packageVersion)
 }

src/main.go

@@ -8,6 +8,7 @@ import (
 const wpmVersion = "1.0.0"
 
 func main() {
+	fmt.Println()
 	if len(os.Args) < 2 {
 		showHelp()
 		return
@@ -32,6 +33,27 @@ func main() {
 			return
 		}
 		showPackageInfo(os.Args[2])
+	case "create":
+		if len(os.Args) < 3 {
+			fmt.Println("Usage: wpm create <package>")
+			return
+		}
+		createPackage(os.Args[2])
+
+	case "delete":
+		if len(os.Args) < 3 {
+			fmt.Println("Usage: wpm delete <package>")
+			return
+		}
+		deletePackage(os.Args[2])
+
+	case "edit":
+		if len(os.Args) < 3 {
+			fmt.Println("Usage: wpm edit <package>")
+			return
+		}
+		editPackage(os.Args[2])
+
 	default:
 		fmt.Println("Unknown command:", command)
 		showHelp()

src/utils.go

@@ -0,0 +1,95 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"runtime"
+	"strings"
+
+	"golang.org/x/term"
+)
+
+type ProgressBar struct {
+	total       int
+	length      int
+	last_suffix int
+	enabled     bool
+}
+
+func (prb *ProgressBar) change(amount int, prefix, suffix string) {
+	if prb.enabled {
+		percent := float64(amount) / float64(prb.total)
+		filledLength := int(float64(prb.length) * percent)
+		fill := "█"
+		end := "█"
+		if amount == prb.total {
+			end = "█"
+		}
+		for len(suffix) < prb.last_suffix {
+			suffix += " "
+		}
+		bar := strings.Repeat(fill, filledLength) + end + strings.Repeat("-", (prb.length-filledLength))
+		fmt.Printf("\r%s [%s] %s", prefix, bar, suffix)
+		// if amount == prb.total {
+		// 	fmt.Println()
+		// }
+		prb.last_suffix = len(suffix) + 3
+	}
+}
+
+func (prb ProgressBar) clean() {
+	if prb.enabled {
+		fmt.Printf("\r" + strings.Repeat(" ", prb.last_suffix+prb.length+2) + "\r")
+	}
+}
+
+func ReadPassword(buff *string) error {
+	safeChar := "*"
+	oldState, err := term.MakeRaw(int(os.Stdin.Fd()))
+	if err != nil {
+		return err
+	}
+	defer term.Restore(int(os.Stdin.Fd()), oldState)
+	for true {
+		b := make([]byte, 1)
+		_, err = os.Stdin.Read(b)
+		if err != nil {
+			return err
+		}
+		chr := string(b[0])
+		if chr == "\r" || chr == "\n" {
+			fmt.Printf("\n\r")
+			return nil
+		} else if chr == "\b" || b[0] == 127 {
+			if len(*buff) > 0 {
+				fmt.Print("\033[1D \033[1D")
+				*buff = string(*buff)[:len(*buff)-1]
+			}
+		} else if b[0] == 3 {
+			os.Exit(0)
+		} else {
+			*buff += chr
+			if safeChar == "off" {
+				fmt.Print(chr)
+			} else {
+				fmt.Print(safeChar)
+			}
+		}
+
+	}
+	return nil
+}
+
+func clear() {
+	switch runtime.GOOS {
+	case "windows":
+		cmd := exec.Command("cmd", "/c", "cls")
+		cmd.Stdout = os.Stdout
+		cmd.Run()
+	default: // Unix-like systems
+		cmd := exec.Command("clear")
+		cmd.Stdout = os.Stdout
+		cmd.Run()
+	}
+}