all: move the metadata keys as constants

2 files changed, 11 insertions, 4 deletions

diff --git a/ciigo.go b/ciigo.go
index 03ab75e..476c9cf 100644
--- a/ciigo.go
+++ b/ciigo.go
@@ -19,6 +19,13 @@ const (
 )
 
 const (
+	metadataAuthor     = "author"
+	metadataDate       = "date"
+	metadataStylesheet = "stylesheet"
+	metadataTitle      = "title"
+)
+
+const (
 	markupKindUnknown byte = iota
 	markupKindAsciidoc
 	markupKindMarkdown
diff --git a/filehtml.go b/filehtml.go
index 151d3ad..7eeda71 100644
--- a/filehtml.go
+++ b/filehtml.go
@@ -47,13 +47,13 @@ func (fhtml *fileHTML) unpackMarkup(fa *fileMarkup) {
 
 	for k, v := range fa.metadata {
 		switch k {
-		case "author":
+		case metadataAuthor:
 			fhtml.Author = v.(string)
-		case "date":
+		case metadataDate:
 			fhtml.Date = v.(string)
-		case "title":
+		case metadataTitle:
 			fhtml.Title = v.(string)
-		case "stylesheet":
+		case metadataStylesheet:
 			fhtml.Styles = append(fhtml.Styles, v.(string))
 		default:
 			fhtml.Metadata[k] = v.(string)