Hugo-theme-stack/layouts/partials/head/opengraph/provider/base.html

{{- $title := partialCached "data/title" . .RelPermalink -}}
{{- $description := partialCached "data/description" . .RelPermalink -}}

<meta property='og:title' content='{{ $title }}'>
<meta property='og:description' content='{{ $description }}'>
<meta property='og:url' content='{{ .Permalink }}'>
<meta property='og:site_name' content='{{ .Site.Title }}'>
<meta property='og:type' content='
    {{- if .IsPage -}}
        article
    {{- else -}}
        website
    {{- end -}}
'>

{{- with .Params.locale -}}
    <meta property='og:locale' content='{{ . }}'>
{{- end -}}

{{- if .IsPage -}}
    <meta property='article:section' content='{{ .Section | title }}' />
    {{- range .Params.tags -}}
        <meta property='article:tag' content='{{ . }}' />
    {{- end -}}
{{- end -}}

{{- if .IsPage -}}
    {{- if not .Date.IsZero -}}
        <meta property='article:published_time' content='{{ .Date.Format "2006-01-02T15:04:05-07:00" | safeHTML }}'/>
    {{- end -}}
    {{- if not .Lastmod.IsZero -}}
        <meta property='article:modified_time' content='{{ .Lastmod.Format "2006-01-02T15:04:05-07:00" | safeHTML }}'/>
    {{- end -}}
{{- else -}}
    {{- if not .Site.Lastmod.IsZero -}}
        <meta property='og:updated_time' content='{{ .Site.Lastmod.Format " 2006-01-02T15:04:05-07:00 " | safeHTML }}'/>
    {{- end -}}
{{- end -}}

{{ $image := partialCached "helper/image" (dict "Context" . "Type" "opengraph") .RelPermalink "opengraph" }}
{{- if $image.exists -}}
    <meta property='og:image' content='{{ absURL $image.permalink }}' />
{{- end -}}