flowers.go

package main
/*

this code will fill your current terminal with a screen full of flowery emoji with optional message in the middle

inspired by this twitter thread:  https://twitter.com/Dixie3Flatline/status/1363897259297972224
and this gist:
https://gist.github.com/april/a4010daa8581626eb4670a08df558311


*/



import (
	"fmt"
	"math/rand"
	"os"
	"strings"
	"syscall"
	"time"
	"unsafe"
)

type winsize struct {
	Row    uint16
	Col    uint16
	Xpixel uint16
	Ypixel uint16
}

func getWindow() (int, int) {
	ws := &winsize{}
	retCode, _, errno := syscall.Syscall(syscall.SYS_IOCTL,
		uintptr(syscall.Stdin),
		uintptr(syscall.TIOCGWINSZ),
		uintptr(unsafe.Pointer(ws)))

	if int(retCode) == -1 {
		panic(errno)
	}
	return int(ws.Col), int(ws.Row)
}

func printRow(width int, insert string) {
	emoji := []string{"🦔", "🌳", "🌷", "🌸", "🌺", "🌻", "🌼", "🐌", "🐛", "🐢", "🐣", "🐦", "🐰", "🐹", "🦉"}

	_width := int(width / 4)

	if len(insert) > 0 {
		insert = fmt.Sprintf(" %s ", insert)
		_width = int((width - (len(insert) + 2)) / 4)
	}

	for i := 0; i < _width; i++ { // divide by two because our emoji take two chars?
		randomIndex := rand.Intn(len(emoji))
		pick := emoji[randomIndex]
		fmt.Print(pick)
	}
	fmt.Print(insert)
	for i := 0; i < _width; i++ { // divide by two because our emoji take two chars?
		randomIndex := rand.Intn(len(emoji))
		pick := emoji[randomIndex]
		fmt.Print(pick)
	}
	fmt.Println()
}

func main() {
	rand.Seed(time.Now().UnixNano())
	outputText := strings.Join(os.Args[1:], " ")
	col, row := getWindow()

	for x := 0; x < row-1; x++ {
		// if we're in the middle
		if x == int(row/2) {
			printRow(col, outputText)
			// blank box above and below our text
		} else if x == int(row/2)-1 {
			printRow(col, strings.Repeat(" ", len(outputText)))
		} else if x == int(row/2)+1 {
			printRow(col, strings.Repeat(" ", len(outputText)))
		} else {
			printRow(col, "")
		}
	}

}