Discord: send links as embeds

Kind of janky but works. This kind of messes up the layout if you write
links in-line.

stripmd.go

@@ -6,18 +6,32 @@ import (
 	stripmd "github.com/writeas/go-strip-markdown"
 )
 
+type Link struct {
+	Alt, URL string
+}
+
 // StripAltText removes Markdown alt text from links and images and replaces them with just the URL.
 // Currently uses the deepest alt text when links/images are nested.
-func StripAltText(md string) string {
+// If links = true, links are completely removed, and a list of URLs and their alt text is also returned.
+func StripAltText(md string, links bool) (string, []Link) {
 	altTextStart := -1 // Start of alt text (between '[' & ']')
 	URLStart := -1     // Start of url (between '(' & ')')
 	URLEnd := -1
 	previousURLEnd := -2
 	out := ""
+	embeds := []Link{}
 	for i := range md {
 		if altTextStart != -1 && URLStart != -1 && md[i] == ')' {
 			URLEnd = i - 1
-			out += md[previousURLEnd+2:altTextStart-1] + md[URLStart:URLEnd+1]
+			out += md[previousURLEnd+2 : altTextStart-1]
+			if links {
+				embeds = append(embeds, Link{
+					URL: md[URLStart : URLEnd+1],
+					Alt: md[altTextStart : URLStart-2],
+				})
+			} else {
+				out += md[URLStart : URLEnd+1]
+			}
 			previousURLEnd = URLEnd
 			altTextStart, URLStart, URLEnd = -1, -1, -1
 			continue
@@ -36,11 +50,12 @@ func StripAltText(md string) string {
 		out += md[previousURLEnd+2:]
 	}
 	if out == "" {
-		return md
+		return md, embeds
 	}
-	return out
+	return out, embeds
 }
 
 func stripMarkdown(md string) string {
-	return strings.TrimPrefix(strings.TrimSuffix(stripmd.Strip(StripAltText(md)), "</p>"), "<p>")
+	stripped, _ := StripAltText(md, false)
+	return strings.TrimPrefix(strings.TrimSuffix(stripmd.Strip(stripped), "</p>"), "<p>")
 }