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repl.go
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repl.go
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package main
import (
"bufio"
"fmt"
"io"
"strconv"
"strings"
"github.com/fatih/color"
)
const PROMPT = ">>> "
const HEADER = `
╭────────────────────────────────────────────╮
│ Give a number(N), and looping │
│ count that you want to waste time on.. │
╰────────────────────────────────────────────╯
`
const OPERATION_TEMPLATE = `
%v try ...
╭─────▶
│ %v
╰─────▶
`
// Start, executes scanner to read user-prompt-inputs
func Start(in io.Reader, out io.Writer) {
color.New(color.FgMagenta).Add(color.Bold).Println(HEADER)
scanner := bufio.NewScanner(in)
for {
color.New(color.FgWhite).Print(PROMPT)
if scanned := scanner.Scan(); !scanned {
return
}
n, c := parseInput(scanner.Text())
if n == 0 && c == 0 {
return
}
// Generate a logger functionality.
logger := func(operation string, tryIndex int) {
parsed := fmt.Sprintf(OPERATION_TEMPLATE, tryIndex, operation)
fmt.Println(parsed)
}
executeLoop(n, c, logger)
}
}
// parseInput parsed user-prompt-input to Number and Loop-count integers.
func parseInput(input string) (n, c int) {
inputs := strings.Split(input, " ")
if len(inputs) == 0 {
return 0, 0
}
num, _ := strconv.Atoi(inputs[0])
count := -1
if len(inputs) > 1 {
count, _ = strconv.Atoi(inputs[1])
}
return num, count
}