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|
package prompt
import (
"fmt"
"strconv"
"github.com/liamg/tml"
)
// ErrUserCancelled means the user cancelled the current action
var ErrUserCancelled = fmt.Errorf("User cancelled")
// ErrUserChoiceInvalid means the user chose an option which was not valid
var ErrUserChoiceInvalid = fmt.Errorf("User choice invalid")
// ChooseFromList prompts the user to select an item from a list. It return the chosen list index, the chosen list item value, or an error
func ChooseFromList(message string, options []string) (int, string, error) {
fmt.Printf("\n %s\n\n", message)
colours := []string{"lightblue", "lightgreen", "lightyellow", "white"}
for i, option := range options {
col := colours[i%len(colours)]
pad := ""
if i+1 < 10 { // ocd padding
pad = " "
}
tml.Printf(
fmt.Sprintf(" %%s<darkgrey>[</darkgrey><%s>%%d<darkgrey>]</darkgrey> <%s>%%s\n", col, col),
pad,
i+1,
option,
)
}
fmt.Println("")
choice := EnterInput("Enter choice (blank to cancel): ")
fmt.Println("")
if choice == "" {
return -1, "", ErrUserCancelled
}
for i, opt := range options {
if opt == choice {
return i, opt, nil
}
}
choiceIndex, err := strconv.Atoi(choice)
if err != nil || choiceIndex-1 >= len(options) || choiceIndex <= 0 {
return -1, "", ErrUserChoiceInvalid
}
return choiceIndex - 1, options[choiceIndex-1], nil
}
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