Add ApplyBasicAccessibleMarkdown func

posts/render.go

@@ -63,6 +63,31 @@ func ApplyBasicMarkdown(data []byte) string {
 	return outHTML
 }
 
+// ApplyBasicAccessibleMarkdown applies Markdown to the given data, rendering basic text formatting and preserving hard
+// line breaks. It is meant for formatting text in small, multi-line UI elements, like user profile biographies.
+func ApplyBasicAccessibleMarkdown(data []byte) string {
+	mdExtensions := 0 |
+		blackfriday.EXTENSION_STRIKETHROUGH |
+		blackfriday.EXTENSION_SPACE_HEADERS |
+		blackfriday.EXTENSION_HEADER_IDS |
+		blackfriday.EXTENSION_HARD_LINE_BREAK
+	htmlFlags := 0 |
+		blackfriday.HTML_SKIP_HTML |
+		blackfriday.HTML_USE_SMARTYPANTS |
+		blackfriday.HTML_SMARTYPANTS_DASHES
+
+	// Generate Markdown
+	md := blackfriday.Markdown([]byte(data), blackfriday.HtmlRenderer(htmlFlags, "", ""), mdExtensions)
+	// Strip out bad HTML
+	policy := bluemonday.UGCPolicy()
+	policy.AllowAttrs("class", "id").Globally()
+	outHTML := string(policy.SanitizeBytes(md))
+	outHTML = markeddownReg.ReplaceAllString(outHTML, "$1")
+	outHTML = strings.TrimRightFunc(outHTML, unicode.IsSpace)
+
+	return outHTML
+}
+
 // StripHTMLWithoutEscaping strips HTML tags with bluemonday's StrictPolicy, then unescapes the HTML
 // entities added in by sanitizing the content.
 func StripHTMLWithoutEscaping(content string) string {