json-schema: add support for Rich Results: Json schema for structured data (#36)

* json-schema: init

* sameAs can be set through .Site.Params.schema.sameAs
* if it is not specified but social-icons exsists, we use social-icons for sameAs vars
* .Site.Params.schema.sameAs overrides social-icons
* publisherType can be changed via .Site.Params.schema.publisherType

layouts/partials/head.html

@@ -51,5 +51,5 @@
 {{- template "_internal/google_analytics_async.html" . }}
 {{- template "partials/templates/opengraph.html" . }}
 {{- template "partials/templates/twitter_cards.html" . }}
-{{- template "partials/templates/schema.html" . }}
+{{- template "partials/templates/schema_json.html" . }}
 {{- end }}

layouts/partials/templates/schema.html

@@ -1,31 +0,0 @@
-<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 }}
-<meta itemprop="datePublished" {{ .PublishDate.Format $ISO8601 | printf "content=%q" | safeHTMLAttr }} />{{ end }}
-{{ if not .Lastmod.IsZero }}<meta itemprop="dateModified" {{ .Lastmod.Format $ISO8601 | printf "content=%q" | safeHTMLAttr }} />{{ end }}
-<meta itemprop="wordCount" content="{{ .WordCount }}">
-{{- if .Params.cover.image -}}
-{{- if (ne .Params.cover.relative true) }}
-<meta itemprop="image" content="{{ .Params.cover.image | absURL }}" />
-{{- else}}
-<meta itemprop="image" content="{{ (path.Join .RelPermalink .Params.cover.image ) | absURL }}" />
-{{- end}}
-{{- else }}
-{{ 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 }}
-{{- 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 }}

layouts/partials/templates/schema_json.html

@@ -0,0 +1,65 @@
+{{ if .IsHome }}
+<script type="application/ld+json">
+{
+  "@context": "https://schema.org",
+  "@type": "{{- ( .Site.Params.schema.publisherType | default "Organization") | humanize -}}",
+  "name": {{ .Site.Title }},
+  "url": {{ .Site.BaseURL }},
+  "description": {{ .Site.Params.description | plainify | truncate 180 | safeHTML }},
+  "thumbnailUrl": {{ .Site.Params.assets.favicon | default "favicon.ico" | absURL }},
+  "sameAs": [
+    {{- if .Site.Params.schema.sameAs }}
+      {{ range $i, $e := .Site.Params.schema.sameAs }}{{ if $i }}, {{ end }}{{ $e }}{{ end }}
+    {{- else}}
+      {{ range $i, $e := .Site.Params.SocialIcons }}{{ if $i }}, {{ end }}{{ $e.url }}{{ end }}
+    {{- end}}
+  ]
+}
+</script>
+{{- else if .IsPage }}
+<script type="application/ld+json">
+{
+  "@context": "https://schema.org",
+  "@type": "BlogPosting",
+  "headline": {{ .Title | plainify}},
+  "name": "{{ .Title | plainify }}",
+  "description": {{ .Summary | plainify | truncate 180 | safeHTML }},
+  "keywords": [
+    {{- if .Params.keywords }}
+    {{ range $i, $e := .Params.keywords }}{{ if $i }}, {{ end }}{{ $e }}{{ end }}
+    {{- else }}
+    {{ range $i, $e := .Params.tags }}{{ if $i }}, {{ end }}{{ $e }}{{ end }}
+    {{- end }}
+  ],
+  "articleBody": {{ .Content | safeJS | htmlUnescape | plainify }},
+  "wordCount" : "{{ .WordCount }}",
+  "inLanguage": {{ .Language.Lang | default "en-us" }},
+  {{ if .Params.cover.image -}}
+  "image":
+    {{- if (ne .Params.cover.relative true) -}}
+    {{ .Params.cover.image | absURL }},
+    {{- else -}}
+    {{ (path.Join .RelPermalink .Params.cover.image ) | absURL }},
+    {{- end}}
+  {{- end}}
+  "datePublished": {{ .PublishDate }},
+  "dateModified": {{ .Lastmod }},
+  "author": {
+    "@type": "Person",
+    "name": {{ .Params.author | default .Site.Params.author }}
+  },
+  "mainEntityOfPage": {
+    "@type": "WebPage",
+    "@id": {{ .Permalink | safeHTML }}
+  },
+  "publisher": {
+    "@type": "{{- ( .Site.Params.schema.publisherType | default "Organization") | humanize -}}",
+    "name": {{ .Site.Title }},
+    "logo": {
+      "@type": "ImageObject",
+      "url": {{ .Site.Params.assets.favicon | default "favicon.ico" | absURL }}
+    }
+  }
+}
+</script>
+{{ end }}