fix #25 missing cards

This fix add the HTML and Bookmark cards to the mobiledoc renderer.
The Bookmark card, is limited, in that it doesn't add all the class
options around the different elements like Ghost does. More work will
need to be done in the upcoming rewrite to allow for class options or
templates for these types.

lib/post.go

@@ -47,6 +47,19 @@ func atomSoftReturn(value string, payload interface{}) string {
 	return "\n"
 }
 
+func cardHTML(payload interface{}) string {
+	m, ok := payload.(map[string]interface{})
+	if !ok {
+		return ""
+	}
+
+	if html, ok := m["html"]; ok {
+		return html.(string)
+	}
+
+	return ""
+}
+
 func cardMarkdown(payload interface{}) string {
 	m, ok := payload.(map[string]interface{})
 	if !ok {
@@ -154,6 +167,87 @@ func cardCode(payload interface{}) string {
 	return buf.String()
 }
 
+func cardBookmark(payload interface{}) string {
+	/*
+	 */
+	m, ok := payload.(map[string]interface{})
+	if !ok {
+		return ""
+	}
+
+	meta, ok := m["metadata"]
+	if !ok {
+		return ""
+	}
+
+	metadata, ok := meta.(map[string]interface{})
+	if !ok {
+		return ""
+	}
+
+	url, ok := metadata["url"]
+	if !ok {
+		return ""
+	}
+	title, ok := metadata["title"]
+	if !ok {
+		return ""
+	}
+	description, ok := metadata["description"]
+	if !ok {
+		return ""
+	}
+
+	var thumbnail, icon, author, publisher, caption string
+	thumb, ok := metadata["thumbnail"]
+	if ok {
+		thumbnail = fmt.Sprintf("<div><img src=%q></div>", thumb.(string))
+	}
+	iconinfo, ok := metadata["icon"]
+	if ok {
+		icon = fmt.Sprintf("<img src=%q>", iconinfo.(string))
+	}
+	authorinfo, ok := metadata["author"]
+	if ok && authorinfo != nil {
+		author = fmt.Sprintf("<span>%s</span>", authorinfo.(string))
+	}
+	publisherinfo, ok := metadata["publisher"]
+	if ok && publisherinfo != nil {
+		publisher = fmt.Sprintf("<span>%s</span>", publisherinfo.(string))
+	}
+
+	capt, ok := m["caption"]
+	if ok && capt != nil {
+		caption = fmt.Sprintf("<figcaption>%s</figcaption>", capt.(string))
+	}
+
+	return fmt.Sprintf(
+		`<figure>
+	     <a href=%q>
+	       <div>
+	         <div>%s</div>
+	         <div>%s</div>
+	         <div>
+	           %s
+	           %s
+	           %s
+	         </div>
+	       </div>
+	       %s
+	     </a>
+	     %s
+	   </figure>`,
+		url.(string),
+		title.(string),
+		description.(string),
+		icon,
+		author,
+		publisher,
+		thumbnail,
+		caption,
+	)
+}
+
 func cardEmbed(payload interface{}) string {
 	m, ok := payload.(map[string]interface{})
 	if !ok {
@@ -211,7 +305,9 @@ func (p post) mobiledocMarkdown() string {
 		WithCard("image", cardImage).
 		WithCard("code", cardCode).
 		WithCard("embed", cardEmbed).
-		WithCard("gallery", cardGallery)
+		WithCard("gallery", cardGallery).
+		WithCard("html", cardHTML).
+		WithCard("bookmark", cardBookmark)
 
 	err := md.Render(&buf)
 	if err != nil {