Files
2019-10-30 19:41:13 +03:00

70 lines
1.3 KiB
Go

// Copyright © 2018 Inanc Gumus
// Learn Go Programming Course
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
//
// For more tutorials : https://learngoprogramming.com
// In-person training : https://www.linkedin.com/in/inancgumus/
// Follow me on twitter: https://twitter.com/inancgumus
/*
✅ #1- Get and check the input
✅ #2- Create a byte buffer and use it as the output
✅ #3- Write input to the buffer as it is and print it
✅ #4- Detect the link
✅ #5- Mask the link
✅ #6- Stop masking when whitespace is detected
✅ #7- Put a http:// prefix in front of the masked link
*/
package main
import (
"fmt"
"os"
)
const (
link = "http://"
nlink = len(link)
mask = '*'
)
func main() {
args := os.Args[1:]
if len(args) != 1 {
fmt.Println("gimme somethin' to mask!")
return
}
var (
text = args[0]
size = len(text)
// create a byte buffer directly from the string (text)
buf = []byte(text)
in bool
)
for i := 0; i < size; i++ {
// no need to add an artificial http:// prefix
// it's already there
if len(text[i:]) >= nlink && text[i:i+nlink] == link {
in = true
i += nlink
}
switch text[i] {
case ' ', '\t', '\n': // try -> unicode.IsSpace
in = false
}
// when censoring mode: on
// directly manipulate the bytes on the buffer
if in {
buf[i] = mask
}
}
fmt.Println(string(buf))
}