schema: add schema support in meta data #844

README.md

@@ -18,7 +18,7 @@ The Relearn theme is a fork of the great [Learn theme](https://github.com/matcor
   - Usable offline, no external dependencies
   - [Usable from your local file system via `file://` protocol](https://mcshelby.github.io/hugo-theme-relearn/basics/customization#file-system)
   - Support for the [VSCode Front Matter extension](https://github.com/estruyf/vscode-front-matter) for on-premise CMS capabilities
-  - [Support for Open Graph and Twitter Cards](https://mcshelby.github.io/hugo-theme-relearn/basics/customization#social-media-meta-tags)
+  - [Support for Open Graph, Schema and Twitter Cards](https://mcshelby.github.io/hugo-theme-relearn/basics/customization#social-media-meta-tags)
 - **Configurable theming and visuals**
   - [Configurable brand images](https://mcshelby.github.io/hugo-theme-relearn/basics/branding#change-the-logo)
   - [Automatic switch for light/dark variant depending on your OS settings](https://mcshelby.github.io/hugo-theme-relearn/basics/branding#adjust-to-os-settings)

layouts/partials/meta.html

@@ -17,4 +17,5 @@
     {{- $authorName := partialCached "authorname.hugo" . }}
     <meta name="author" content="{{ $authorName }}">
     {{- partial "twitter_cards.html" . }}
-    {{- partial "opengraph.html" . }}
+    {{- partial "opengraph.html" . }}
+    {{- partial "schema.html" . }}

layouts/partials/schema.html

@@ -0,0 +1,57 @@
+{{- /* based on Hugo 0.125.3 schema.html */}}
+{{- with partial "pageHelper/title.hugo" (dict "page" . "fullyQualified" true "reverse" true) }}
+    <meta itemprop="name" content="{{ . }}">
+{{- end }}
+
+{{- with or .Description .Summary site.Params.Description }}
+    <meta itemprop="description" content="{{ . }}">
+{{- end }}
+
+{{- $ISO8601 := "2006-01-02T15:04:05-07:00" }}
+{{- with .PublishDate }}
+    <meta itemprop="datePublished" {{ .Format $ISO8601 | printf "content=%q" | safeHTMLAttr }}>
+{{- end }}
+
+{{- with .Lastmod }}
+    <meta itemprop="dateModified" {{ .Format $ISO8601 | printf "content=%q" | safeHTMLAttr }}>
+{{- end }}
+
+{{- with .WordCount }}
+    <meta itemprop="wordCount" content="{{ . }}">
+{{- end }}
+
+{{- $images := partial "_funcs/get-page-images" . }}
+{{- range first 6 $images }}
+    <meta itemprop="image" content="{{ .Permalink }}">
+{{- end }}
+
+{{- /*
+Keywords precedence:
+
+1. Use "keywords" term page titles.
+2. Use "keywords" from front matter if "keywords" is not a taxonomy.
+3. Use "tags" term page titles.
+4. Use term page titles from all taxonomies.
+
+*/}}
+{{- $keywords := slice }}
+{{- range .GetTerms "keywords" }}
+  {{- $keywords = $keywords | append .Title }}
+{{- else }}
+  {{- with .Keywords }}
+    {{- $keywords = . }}
+  {{- else }}
+    {{- range .GetTerms "tags" }}
+      {{- $keywords = $keywords | append .Title }}
+    {{- else }}
+      {{- range $taxonomy, $_ := site.Taxonomies }}
+        {{- range $.GetTerms $taxonomy }}
+          {{- $keywords = $keywords | append .Title }}
+        {{- end }}
+      {{- end }}
+    {{- end }}
+  {{- end }}
+{{- end }}
+{{- with $keywords }}
+    <meta itemprop="keywords" content="{{ delimit . `,` }}">
+{{- end }}

theme.toml

@@ -19,7 +19,7 @@ features = ["badges", "breadcrumbs", "boxes", "buttons",
   "oas", "offline usable", "openapi", "open graph",
   "print", "printable",
   "responsive", "rss", "rtl",
-  "search", "search page", "sidebar", "sitemap", "subtheme", "swagger", "swaggerui", "syntax highlighting",
+  "schema", "search", "search page", "sidebar", "sitemap", "subtheme", "swagger", "swaggerui", "syntax highlighting",
   "table of contents", "tab", "tabs", "tags", "taxonomy", "themeable", "themes", "toc", "topbar buttons", "twitter cards"]
 
 [module]