package command

import (
	"strings"
)

func getTextMiddle(text, left, right string) string {
	start := 0
	if left != "" {
		idx := strings.Index(text, left)
		if idx == -1 {
			return ""
		}
		start = idx + len(left)
	}

	if right == "" {
		if start > len(text) {
			return ""
		}
		return text[start:]
	}

	endIdx := strings.Index(text[start:], right)
	if endIdx == -1 {
		return ""
	}
	return text[start : start+endIdx]
}

func getCommand(content string) string {
	return getTextMiddle(content, "[", "]")
}

func parseCommand(content, cmdType string) string {
	return getTextMiddle(content, "<" + cmdType + ">", "</" + cmdType + ">")
}

func ExecuteCommand(input string) error {
	return nil
}