Created
September 30, 2023 11:21
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2-prompter, new scanner in each function
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package main | |
import ( | |
"bufio" | |
"fmt" | |
"os" | |
"strconv" | |
) | |
// scanStringUntilValid is a helper provided to get a string input from the | |
// terminal. It doesn't do any additional logic to simply retrieving the user | |
// input; it is only provided for consistency. | |
func scanStringUntilValid(prefix string) string { | |
fmt.Print(prefix) | |
s := bufio.NewScanner(os.Stdin) | |
s.Scan() | |
return s.Text() | |
} | |
// scanIntUntilValid is a helper provided to get a float input from the terminal. | |
// It will prompt the user for a value until the value is a valid floating | |
// point number. | |
func scanFloatUntilValid(prefix string) float64 { | |
var valfloat float64 | |
var err error | |
s := bufio.NewScanner(os.Stdin) | |
for { | |
fmt.Print(prefix) | |
s.Scan() | |
val := s.Text() | |
if valfloat, err = strconv.ParseFloat(val, 64); err != nil { | |
fmt.Println("Invalid number, please try again.") | |
continue | |
} | |
return float64(valfloat) | |
} | |
} | |
type Debt struct { | |
Person string | |
Amount float64 | |
Currency string | |
Details string | |
} | |
func CreateDebtPrompter(header string) Debt { | |
if header != "" { | |
fmt.Println(header) | |
} | |
debt := Debt{} | |
debt.Person = scanStringUntilValid("person: ") | |
debt.Amount = scanFloatUntilValid("amount: ") | |
debt.Currency = scanStringUntilValid("currency: ") | |
debt.Details = scanStringUntilValid("details: ") | |
return debt | |
} | |
func main() { | |
debt := CreateDebtPrompter("") | |
fmt.Println("debt created: %s", debt) | |
return | |
} |
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