Better metadata

2019-07-06 19:36:04 +02:00
parent f5ab289166
commit 7aab65f2ac
5 changed files with 80 additions and 42 deletions
--- a/webcontroller/opengraph.go
+++ b/webcontroller/opengraph.go
@@ -1,38 +1,87 @@
 package webcontroller

 import (
+	"html/template"
+	"strings"
+
 	"fornaxian.com/pixeldrain-web/pixelapi"
 )

-// OGData holds all information needed to populate the various meta tags on the
-// file and list viewer
-type OGData struct {
-	Title       string
-	Type        string
-	SiteName    string
-	Description string
-	URL         string
-	Image       string
+type ogRule struct {
+	Prop    string
+	Content string
 }

-// OpenGraphFromFile populates the OGData object from FileInfo
-func OpenGraphFromFile(f pixelapi.FileInfo) (og OGData) {
-	og.Title = f.Name
-	og.Type = "website"
-	og.SiteName = "Pixeldrain"
-	og.Description = "View " + f.Name + " on Pixeldrain"
-	og.URL = "/u/" + f.ID
-	og.Image = "/api/file/" + f.ID + "/thumbnail"
-	return og
+func (o ogRule) HTML() template.HTML {
+	return template.HTML(`<meta property="` + o.Prop + `" content="` + o.Content + `"/>` + "\n")
 }

-// OpenGraphFromList populates the OGData object from a List
-func OpenGraphFromList(l pixelapi.List) (og OGData) {
-	og.Title = l.Title
-	og.Type = "website"
-	og.SiteName = "Pixeldrain"
-	og.Description = "View " + l.Title + " on Pixeldrain"
-	og.URL = "/l/" + l.ID
-	og.Image = "/api/file/" + l.Files[0].ID + "/thumbnail"
-	return og
+type twitterRule struct {
+	Name    string
+	Content string
+}
+
+func (o twitterRule) HTML() template.HTML {
+	return template.HTML(`<meta name="` + o.Name + `" content="` + o.Content + `"/>` + "\n")
+}
+
+type linkRule struct {
+	Rel  string
+	HREF string
+}
+
+func (o linkRule) HTML() template.HTML {
+	return template.HTML(`<link name="` + o.Rel + `" href="` + o.HREF + `"/>` + "\n")
+}
+
+func metadataFromFile(f pixelapi.FileInfo) (meta template.HTML) {
+	meta += ogRule{"og:title", f.Name}.HTML()
+	meta += ogRule{"og:site_name", "pixeldrain"}.HTML()
+	meta += ogRule{"og:description", "View '" + f.Name + "' on Pixeldrain"}.HTML()
+	meta += ogRule{"description", "View '" + f.Name + "' on Pixeldrain"}.HTML()
+	meta += ogRule{"og:url", "/u/" + f.ID}.HTML()
+
+	if strings.HasPrefix(f.MimeType, "image") {
+		meta += ogRule{"og:type", "article"}.HTML()
+		meta += ogRule{"og:image", "/api/file/" + f.ID}.HTML()
+
+		meta += twitterRule{"twitter:image", "/api/file/" + f.ID}.HTML()
+		meta += linkRule{"image_src", "/api/file/" + f.ID}.HTML()
+	} else if strings.HasPrefix(f.MimeType, "video") {
+		meta += ogRule{"og:type", "video.other"}.HTML()
+		meta += ogRule{"og:image", "/api/file/" + f.ID + "/thumbnail"}.HTML()
+		meta += ogRule{"og:video", "/api/file/" + f.ID}.HTML()
+		meta += ogRule{"og:video:secure_url", "/api/file/" + f.ID}.HTML()
+		meta += ogRule{"og:video:type", f.MimeType}.HTML()
+
+		meta += twitterRule{"twitter:card", "player"}.HTML()
+		meta += twitterRule{"twitter:image", "/api/file/" + f.ID + "/thumbnail"}.HTML()
+		meta += twitterRule{"twitter:player", "/api/file/" + f.ID}.HTML()
+		meta += twitterRule{"twitter:player:stream", "/api/file/" + f.ID}.HTML()
+		meta += twitterRule{"twitter:player:stream:content_type", f.MimeType}.HTML()
+		meta += linkRule{"image_src", "/api/file/" + f.ID + "/thumbnail"}.HTML()
+	} else if strings.HasPrefix(f.MimeType, "audio") {
+		meta += ogRule{"og:type", "music.song"}.HTML()
+		meta += ogRule{"og:audio", "/api/file/" + f.ID}.HTML()
+		meta += ogRule{"og:audio:secure_url", "/api/file/" + f.ID}.HTML()
+		meta += ogRule{"og:audio:type", f.MimeType}.HTML()
+		meta += linkRule{"image_src", "/api/file/" + f.ID + "/thumbnail"}.HTML()
+	} else {
+		meta += ogRule{"og:type", "website"}.HTML()
+		meta += linkRule{"image_src", "/api/file/" + f.ID + "/thumbnail"}.HTML()
+	}
+	return meta
+}
+func metadataFromList(l pixelapi.List) (meta template.HTML) {
+	meta += ogRule{"og:type", "website"}.HTML()
+	meta += ogRule{"og:title", l.Title}.HTML()
+	meta += ogRule{"og:site_name", "pixeldrain"}.HTML()
+	meta += ogRule{"og:description", "View '" + l.Title + "' on Pixeldrain"}.HTML()
+	meta += ogRule{"description", "View '" + l.Title + "' on Pixeldrain"}.HTML()
+	meta += ogRule{"og:url", "/l/" + l.ID}.HTML()
+	meta += ogRule{"og:image", "/api/file/" + l.Files[0].ID + "/thumbnail"}.HTML()
+	meta += ogRule{"og:image:url", "/api/file/" + l.Files[0].ID + "/thumbnail"}.HTML()
+	meta += twitterRule{"twitter:image", "/api/file/" + l.Files[0].ID + "/thumbnail"}.HTML()
+	meta += linkRule{"image_src", "/api/file/" + l.Files[0].ID + "/thumbnail"}.HTML()
+	return meta
 }