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package main
import (
"fmt"
"strings"
)
const (
boxErrHorLine = '═'
boxErrHorDownLine = '╦'
boxErrHorUpLine = '╩'
boxErrVertLine = '║'
boxErrVertRightLine = '╠'
boxErrVertLeftLine = '╣'
boxErrTopLeftCorner = '╔'
boxErrTopRightCorner = '╗'
boxErrBottomLeftCorner = '╚'
boxErrBottomRightCorner = '╝'
boxHorLine = '─'
boxHorDownLine = '┬'
boxHorUpLine = '┴'
boxVertLine = '│'
boxVertRightLine = '├'
boxVertLeftLine = '┤'
boxTopLeftCorner = '┌'
boxTopRightCorner = '┐'
boxBottomLeftCorner = '└'
boxBottomRightCorner = '┘'
)
// Returns an error box
func errorBox(message string) (box string) {
// 2+len because message length doesn't accomodate the spaces between the left and right border
box += fmt.Sprintf("%c%v%c\n", boxErrTopLeftCorner, repeatRune(boxErrHorLine, 2+len(message)), boxErrTopRightCorner)
box += fmt.Sprintf("%c %v %c\n", boxErrVertLine, message, boxErrVertLine)
box += fmt.Sprintf("%c%v%c\n", boxErrBottomLeftCorner, repeatRune(boxErrHorLine, 2+len(message)), boxErrBottomRightCorner)
return
}
// Returns a normal box, most commonly used for the menu items
func normalBox(railed bool, messages ...string) (box string) {
message := strings.Join(messages, " │ ")
var messagesLengths []int
for i := 0; i < len(messages)-1; i++ {
messagesLengths = append(messagesLengths, len(messages[i]))
}
/* The message is the middle part between the left and right border,
so you have to add 2 for the spaces between it and the borders.
Since each "│" character adds 3 to the length (and not 1),
get the amount of "│" character from number of messages, double the value
and finally subtract (so, "││" is len 6, 2 "│" characters * 2 = 4, 6 - 4 = 2).
*/
messageLength := 2 + len(message) - 2*(len(messages)-1)
box += fmt.Sprintf("%c%v%c\n", boxTopLeftCorner, repeatRune(boxHorLine, messageLength), boxTopRightCorner)
box += fmt.Sprintf("%c %v %c\n", boxVertLine, message, boxVertLine)
box += fmt.Sprintf("%c%v%c\n", boxBottomLeftCorner, repeatRune(boxHorLine, messageLength), boxBottomRightCorner)
indTop := 0
/* messageLength doesn't include the left and right spaces that are in middle part
and on each line there are \n characters (hence adding 2 at the end).
With this variable, we're practically at index 0 on the third line.
*/
indBot := 2*(messageLength+2) + 2
if railed {
box = replaceAtIndex(box, boxVertRightLine, indBot)
}
for _, val := range messagesLengths {
/* +1 Because message length doesn't include the " " in the beginning
+2 because we're now at the index of the last letter, and need to go to
the right border index
And that in total means we add 3 to length
*/
indTop += val + 3
indBot += val + 3
// Replaces the border character on the top with one that connects to the middle border: ┌───────────┬───────────┐
box = replaceAtIndex(box, boxHorDownLine, indTop)
// Replaces the border character on the bottom with one that connects to the middle broder: └───────────┴───────────┘
box = replaceAtIndex(box, boxHorUpLine, indBot)
}
return
}
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