Init

intheshell.go

@@ -0,0 +1,172 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"strconv"
+	"strings"
+	"time"
+)
+
+// Constants
+const (
+	OneMSec   = 1000 * 1000       // One milliseond
+	OneSec    = 1000 * 1000 * 100 // One second
+	TextSpeed = 50                // Text showing speed
+)
+
+// Return Ghost and his height
+func getGhost() string {
+	ghost := ps1str() + " \n" +
+		ps1str() + Bold("    ___\n") +
+		ps1str() + Bold("  _/ @@\\\n") +
+		ps1str() + Bold(" ( \\  0/__\n") +
+		ps1str() + Bold("  \\    \\__)\n") +
+		ps1str() + Bold("  /     \\\n") +
+		ps1str() + Bold(" /       \\\n") +
+		ps1str() + Bold(" ^^^^^^^^^\n") +
+		ps1str()
+	return ghost
+}
+
+// Show text from black to white
+func textShowSlow(inString string) {
+	for i := 232; i <= 255; i++ {
+		os.Stdout.Write([]byte("\033[38;5;" + strconv.Itoa(i) + "m" + Bold(inString) + "\033[0m\r\r\r\r\r\r\r\r\r\r\r\r\r\r"))
+		time.Sleep(OneMSec * TextSpeed)
+		os.Stdout.Sync()
+	}
+}
+
+// Show text from white to black
+func textHideSlow(inString string) {
+	for i := 255; i >= 232; i-- {
+		os.Stdout.Write([]byte("\033[38;5;" + strconv.Itoa(i) + "m" + Bold(inString) + "\033[0m\r\r\r\r\r\r\r\r\r\r\r\r"))
+		time.Sleep(OneMSec * TextSpeed)
+		os.Stdout.Sync()
+	}
+
+}
+
+// Clearing screen
+func clearScreen() {
+	os.Stdout.Write([]byte("\033[H\033[2J"))
+	os.Stdout.Sync()
+}
+
+// Bold text
+func Bold(inString string) string {
+	return "\033[1m" + inString + "\033[0m"
+}
+
+// Creating PS1
+func ps1str() string {
+	return "ghost@shell:~$ "
+}
+
+func showCreds() {
+	os.Stdout.Write([]byte("\n\n"))
+	os.Stdout.Write([]byte(centrifyText("Created")))
+	os.Stdout.Write([]byte("\n"))
+	os.Stdout.Write([]byte(centrifyText("by")))
+	os.Stdout.Write([]byte("\n\n"))
+	os.Stdout.Write([]byte(Bold(centrifyText("Andrey Esin"))))
+	os.Stdout.Write([]byte("\n\n"))
+	os.Stdout.Write([]byte(centrifyText("[ twitter.com/la_stik ] [ t.me/la_stik ] [ [email protected] ]")))
+	os.Stdout.Write([]byte("\n"))
+
+	os.Stdout.Sync()
+}
+
+// Get terminal columns count
+func getCols() int {
+	cmd := exec.Command("stty", "size")
+	cmd.Stdin = os.Stdin
+	out, err := cmd.Output()
+	if err != nil {
+		log.Fatal(err)
+	}
+	outStr := string(out)
+	outStr = strings.Replace(outStr, "\n", "", -1)
+	cols, err := strconv.Atoi(strings.Split(outStr, " ")[1])
+	if err != nil {
+		log.Fatal(err)
+	}
+	return cols
+}
+
+// Return string, which can be showed in horizontal center of terminal
+func centrifyText(inText string) string {
+	cols := getCols()
+	resultString := ""
+	spacesCount := (cols / 2) - (len(inText) / 2)
+	for i := 0; i < spacesCount; i++ {
+		resultString = resultString + " "
+	}
+	resultString = resultString + inText
+	return resultString
+}
+
+func main() {
+	clearScreen()
+	// Hide cursor
+
+	os.Stdout.Write([]byte("\033[?25l"))
+
+	//1 scene
+	//Andrey Esin
+	os.Stdout.Write([]byte("\n\n\n\n"))
+	textShowSlow(centrifyText("Andrey Esin"))
+	time.Sleep(OneSec * 5)
+	textHideSlow(centrifyText("Andrey Esin"))
+	time.Sleep(OneSec * 1)
+	clearScreen()
+	// 2 scene
+	// PRESENTS
+	os.Stdout.Write([]byte("\n\n\n\n"))
+	textShowSlow(centrifyText("PRESENTS"))
+	time.Sleep(OneSec * 5)
+	textHideSlow(centrifyText("PRESENTS"))
+	time.Sleep(OneSec * 1)
+	clearScreen()
+
+	// 3 scene
+	// GHOST IN THE SHELL (bash)
+	os.Stdout.Write([]byte("\n\n\n\n"))
+	textShowSlow(centrifyText("GHOST IN THE SHELL (bash)"))
+	time.Sleep(OneSec * 5)
+	textHideSlow(centrifyText("GHOST IN THE SHELL (bash)"))
+	time.Sleep(OneSec * 1)
+	clearScreen()
+
+	ghost := getGhost()
+	spaces := " "
+	fmt.Print("\033[?25l")
+	for i := 0; i < getCols()-15-len(ps1str()); i++ {
+		clearScreen()
+		spaces += " "
+
+		result := strings.Replace(ghost, ps1str(), ps1str()+spaces, -1)
+		//println(result)
+		os.Stdout.Write([]byte(result))
+		time.Sleep(OneMSec * 50)
+		os.Stdout.Sync()
+	}
+
+	clearScreen()
+
+	//GHOST IN THE SHELL (bash)
+	os.Stdout.Write([]byte("\n\n\n\n"))
+	textShowSlow(centrifyText("THE END"))
+	time.Sleep(OneSec * 5)
+	textHideSlow(centrifyText("THE END"))
+	time.Sleep(OneSec * 1)
+
+	clearScreen()
+	showCreds()
+	// Return cursor
+	os.Stdout.Write([]byte("\033[?25h"))
+	os.Exit(0)
+}