Post Discord questions as named threads (#17)

Stacks on #16. Opens a public thread named "{author} asks: {title}" and puts the post body in the first thread message.

Reviewed-on: #17
Co-authored-by: codegirl-007 <s.raide@gmail.com>

internal/discord/format.go

@@ -39,7 +39,7 @@ func formatMessage(ev events.PostEvent) Message {
 		Description: truncateRunes(strings.TrimSpace(ev.Body), embedDescriptionLimit),
 		City:        strings.TrimSpace(ev.City),
 		Author:      author,
-		ThreadName:  threadName(ev.Title),
+		ThreadName:  threadName(author, ev.Title),
 	}
 	for _, img := range ev.Images {
 		url := strings.TrimSpace(img.URL)
@@ -51,12 +51,16 @@ func formatMessage(ev events.PostEvent) Message {
 	return msg
 }
 
-func threadName(title string) string {
+func threadName(author, title string) string {
+	author = strings.TrimSpace(author)
+	if author == "" {
+		author = "Someone"
+	}
 	title = strings.TrimSpace(title)
 	if title == "" {
-		return "Question"
+		title = "Question"
 	}
-	return truncateRunes(title, threadNameLimit)
+	return truncateRunes(author+" asks: "+title, threadNameLimit)
 }
 
 func truncateRunes(s string, max int) string {
@@ -73,3 +77,35 @@ func truncateRunes(s string, max int) string {
 func isRoot(ev events.PostEvent) bool {
 	return strings.TrimSpace(ev.ParentID) == ""
 }
+
+func messageContent(msg Message) string {
+	var parts []string
+	if body := strings.TrimSpace(msg.Description); body != "" {
+		parts = append(parts, body)
+	}
+	var meta []string
+	if msg.City != "" {
+		meta = append(meta, msg.City)
+	}
+	if msg.Author != "" {
+		meta = append(meta, msg.Author)
+	}
+	if len(meta) > 0 {
+		parts = append(parts, strings.Join(meta, " · "))
+	}
+	if u := publicURL(msg.URL); u != "" {
+		parts = append(parts, u)
+	}
+	return truncateRunes(strings.Join(parts, "\n"), 2000)
+}
+
+func publicURL(raw string) string {
+	raw = strings.TrimSpace(raw)
+	if !strings.HasPrefix(raw, "https://") {
+		return ""
+	}
+	if strings.Contains(raw, "localhost") || strings.Contains(raw, "127.0.0.1") {
+		return ""
+	}
+	return raw
+}