package link

import (
	"regexp"
	"strings"
)

var linkRe = regexp.MustCompile(`\[\[(.+?)\]\]`)

func ExtractLinks(body string) []string {
	matches := linkRe.FindAllStringSubmatch(body, -1)
	if len(matches) == 0 {
		return nil
	}

	seen := map[string]bool{}
	var result []string
	for _, m := range matches {
		text := strings.TrimSpace(m[1])
		if text == "" || seen[text] {
			continue
		}
		seen[text] = true
		result = append(result, text)
	}
	return result
}