package template

import (
	"fmt"
	"strings"
)

// Extract returns the content between marker comments in a Confluence XML document.
func Extract(xmlDoc, markerStart, markerEnd string) (string, error) {
	startIdx := strings.Index(xmlDoc, markerStart)
	if startIdx == -1 {
		return "", fmt.Errorf("start marker %q not found in document", markerStart)
	}
	endIdx := strings.Index(xmlDoc, markerEnd)
	if endIdx == -1 {
		return "", fmt.Errorf("end marker %q not found in document", markerEnd)
	}
	if endIdx < startIdx {
		return "", fmt.Errorf("end marker appears before start marker")
	}

	content := xmlDoc[startIdx+len(markerStart) : endIdx]
	return strings.TrimSpace(content), nil
}