tpl/tplimpl: Featured and Site.Params image support for Schema

tpl/tplimpl/embedded/templates/schema.html

@@ -1,14 +1,23 @@
 <meta itemprop="name" content="{{ .Title }}">
 <meta itemprop="description" content="{{ with .Description }}{{ . }}{{ else }}{{if .IsPage}}{{ .Summary }}{{ else }}{{ with .Site.Params.description }}{{ . }}{{ end }}{{ end }}{{ end }}">
 
-{{if .IsPage}}{{ $ISO8601 := "2006-01-02T15:04:05-07:00" }}{{ if not .PublishDate.IsZero }}
+{{- if .IsPage }}{{ $ISO8601 := "2006-01-02T15:04:05-07:00" }}{{ if not .PublishDate.IsZero }}
 <meta itemprop="datePublished" content="{{ .PublishDate.Format $ISO8601 | safeHTML }}" />{{ end }}
 {{ if not .Lastmod.IsZero }}<meta itemprop="dateModified" content="{{ .Lastmod.Format $ISO8601 | safeHTML }}" />{{ end }}
 <meta itemprop="wordCount" content="{{ .WordCount }}">
-{{ with .Params.images }}{{ range first 6 . }}
-  <meta itemprop="image" content="{{ . | absURL }}">
-{{ end }}{{ end }}
+{{ with $.Params.images }}{{ range first 6 . -}}
+<meta itemprop="image" content="{{ . | absURL }}">
+{{ end }}{{ else -}}
+{{- $images := $.Resources.ByType "image" -}}
+{{- $featured := $images.GetMatch "*feature*" -}}
+{{- if not $featured }}{{ $featured = $images.GetMatch "{*cover*,*thumbnail*}" }}{{ end -}}
+{{- with $featured -}}
+<meta itemprop="image" content="{{ $featured.Permalink }}">
+{{ else -}}
+{{- with $.Site.Params.images -}}
+<meta itemprop="image" content="{{ index . 0 | absURL }}"/>
+{{ end }}{{ end }}{{ end }}
 
 <!-- Output all taxonomies as schema.org keywords -->
 <meta itemprop="keywords" content="{{ if .IsPage}}{{ range $index, $tag := .Params.tags }}{{ $tag }},{{ end }}{{ else }}{{ range $plural, $terms := .Site.Taxonomies }}{{ range $term, $val := $terms }}{{ printf "%s," $term }}{{ end }}{{ end }}{{ end }}" />
-{{ end }}
+{{- end }}