package parse

import (
	"maps"
	"regexp"
	"slices"
)

var mentionRegex = regexp.MustCompile(`@([a-z0-9_]+)`)

func Mentions(text string) []string {
	seen := make(map[string]bool)
	for _, m := range mentionRegex.FindAllStringSubmatch(text, -1) {
		seen[m[1]] = true
	}
	return slices.Collect(maps.Keys(seen))
}