discordo-plus/discordmd/discordmd.go

package discordmd

import (
	"regexp"
)

var (
	boldRegex          = regexp.MustCompile(`(?ms)\*\*(.*?)\*\*`)
	italicRegex        = regexp.MustCompile(`(?ms)\*(.*?)\*`)
	underlineRegex     = regexp.MustCompile(`(?ms)__(.*?)__`)
	strikeThroughRegex = regexp.MustCompile(`(?ms)~~(.*?)~~`)
)

// Parse parses Discord-flavored markdown to tview's [Color Tags].
//
// [Color Tags]: https://pkg.go.dev/github.com/rivo/tview#hdr-Colors
func Parse(md string) string {
	md = boldRegex.ReplaceAllString(md, "[::b]$1[::-]")
	md = italicRegex.ReplaceAllString(md, "[::i]$1[::-]")
	md = underlineRegex.ReplaceAllString(md, "[::u]$1[::-]")
	md = strikeThroughRegex.ReplaceAllString(md, "[::s]$1[::-]")

	return md
}