Add rune input functions

front/input_utils.go

@@ -0,0 +1,52 @@
+package front
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+)
+
+// Input prompts the user for input and
+// returns the input as a string.
+func Input(prompt string) string {
+	fmt.Print(prompt + " ")
+	reader := bufio.NewReader(os.Stdin)
+	userInput, _ := reader.ReadString('\n')
+	return strings.TrimRight(userInput, "\n\r ") // remove trailing newlines, carriage returns, and spaces
+}
+
+// Input prompts the user for input and
+// returns the input as a rune.
+func InputRune(prompt string) rune {
+	fmt.Print(prompt + " ")
+	reader := bufio.NewReader(os.Stdin)
+	userInput, _, _ := reader.ReadRune()
+	return userInput
+}
+
+// InputBinary prompts the user with a yes/no
+// question and returns the response as a boolean.
+func InputBinary(prompt string) bool {
+	reader := bufio.NewReader(os.Stdin)
+	fmt.Print(prompt + " (y/N) ")
+	char, _, _ := reader.ReadRune()
+	if char == 'y' || char == 'Y' {
+		return true
+	}
+	return false
+}
+
+// InputInt prompts the user for input and returns the input as an integer.
+// A negative min/max value will disable the respective limit.
+func InputInt(prompt string, min, max int) int {
+	for {
+		fmt.Print(prompt + " ")
+		var userInput int
+		_, err := fmt.Scanln(&userInput)
+		if err == nil && (userInput >= min || min < 0) && (userInput <= max || max < 0) {
+			return userInput
+		}
+		fmt.Println()
+	}
+}