zephinzer/dev

package prompt

import (
    "fmt"
    "strconv"

    "github.com/zephinzer/dev/pkg/utils/str"
)

// ToSelect prompts the user to select an option from the provided
// `options.Options` argument. On success, returns the selected index.
// Returns `ErrorSkipped` if the user indicated to skip, returns
// `ErrorInput` on input validation errors, returns `ErrorSystem` on
// system errors
func ToSelect(options InputOptions) (int, error) {
    helper := InputHelper(options)
    fmt.Printf("\n")
    helper.PrintBeforeMessage()
    fmt.Printf("\n")
    helper.PrintOptions()
    fmt.Printf("\n")
    helper.PrintAfterMessage()
    if readInputError := helper.ReadInput(); readInputError != nil {
        return int(ErrorSystem), readInputError
    }
    response := helper.GetData()
    if str.IsEmpty(response) {
        return int(ErrorSkipped), nil
    }
    selectedOption, atoiError := strconv.Atoi(response)
    if atoiError != nil {
        return int(ErrorInput), fmt.Errorf("an invalid response was provided: %s", atoiError)
    } else if selectedOption == 0 {
        return int(ErrorSkipped), nil
    } else if selectedOption < 0 || selectedOption > len(options.SerializedOptions) {
        return int(ErrorInput), fmt.Errorf("an out-of-range response '%v' was provided", selectedOption)
    }
    return selectedOption - 1, nil
}