layouts/partials/head/meta.html

{{ "<!-- meta.html -->" | safeHTML -}}
{{- $author := cond (and .IsPage .Params.author) .Params.author site.Params.Author.Name }}
{{- $siteTitle := or site.Title site.Params.title | plainify }}
{{- $permalink := .Permalink }}
{{- $title := cond .IsHome $siteTitle (printf "%s | %s" .Title $siteTitle) | plainify  }}
    {{- $desc := or .Params.Subtitle .Params.Description .Description .Summary }}
    {{- $siteDesc := or site.Params.description site.Params.subtitle }}
    {{- if and .IsHome $siteDesc }}
        {{- $desc = $siteDesc  }}
    {{- else if and (not .IsPage) $siteDesc }}
        {{- $desc =  printf "%s | %s" .Kind $siteTitle }}
    {{- end }}
{{- $desc = $desc | plainify | htmlUnescape | truncate 150 }}
{{- $cover := partial "page/cover.html" (dict "page" .) }}
    {{- if and (not $cover) (not .IsPage) }}
        {{- $cover = or site.Params.images site.Params.socialCard }}
    {{- end }}
{{- $keywords := dict }}
    {{- $tag := or .Params.keywords .Params.tags }}
    {{- if .IsHome }}
        {{- $keywords = slice (i18n "home") }}
    {{- else if $tag }}
        {{- $keywords = $tag }}
    {{- end }}

<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>{{ $title }}</title>
<meta name="author" content="{{ $author }}">
{{ with $desc -}}
    <meta name="description" content="{{ . }}" >
{{ end -}}
{{ with $keywords -}}
    <meta name="keywords" content="{{ delimit . "," }}">
{{ end -}}
<link rel="canonical" href="{{ .Permalink }}">
{{ with .Translations -}}
    {{- range . -}}
        <link rel="alternate" hreflang="{{ .Language.Lang }}" href="{{ .Permalink }}" title="{{ .Language.LanguageName }}">
    {{- end }}
{{- end }}
{{ with .Site.Params.favicon }}
    <link rel="icon" href="{{ . }}">
{{ end }}

{{- $host := partial "partials/fediverse/instance.html" . }}
{{- $user := partial "partials/fediverse/username.html" .}}
{{ if and $host $user }}
    <link rel="me" href="{{ print "https://" $host "/@" $user  }}">
{{ end }}

{{- $ISO8601 := "2006-01-02T15:04:05-07:00" }}
{{- $publishDate := .PublishDate.Format $ISO8601 }}
{{- $lastMod := .Lastmod.Format $ISO8601 }}

{{- $extMeta := or site.Params.extMeta site.Params.socialCard.enable }}
{{- if or $extMeta site.Params.socialCard.twitter }}
    {{ template "twitterCard" (dict "page" . "title" $title "desc" $desc "cover" $cover) }}
{{- end }}

{{- if or $extMeta site.Params.socialCard.opengraph }}
    {{ template "openGraph" (dict "page" . "siteTitle" $siteTitle "author" $author "title" $title "desc" $desc "cover" $cover "keywords" $keywords "publishDate" $publishDate "lastMod" $lastMod) }}
{{- end }}

{{- if site.Params.socialCard.schema }}
    {{/*  no HTMl props at the moment  */}}
    {{- template "schema" (dict "page" . "title" $title "desc" $desc "cover" $cover "keywords" $keywords) }}
{{- end }}

{{- if site.Params.socialCard.jsonLD }}
    {{/*  permalink needs workaround  */}}
    {{- template "jsonLD" (dict "page" . "siteTitle" $siteTitle "permalink" $permalink "author" $author "title" $title "desc" $desc "cover" $cover "keywords" $keywords  "publishDate" $publishDate "lastMod" $lastMod) }}
{{- end }}

{{- /*---------------------- end of meta.html ----------------------*/}}

{{- define "openGraph" }}
    {{ "<!-- openGraph -->" | safeHTML -}}
    {{- $ISO8601 := "2006-01-02T15:04:05-07:00" }}
    {{- $facebookAdmin := site.Params.socialCard.facebookAdmin }}
    {{- $facebookAppID := site.Params.socialCard.facebookAppID }}
    <meta property="og:title" content="{{ .title }}" />
    <meta property="og:description" content="{{ .desc }}" />
    <meta property="og:type" content="{{ if .page.IsPage }}article{{ else }}website{{ end }}" />
    <meta property="og:url" content="{{ .page.Permalink }}" />
    {{- with .cover }}
        <meta property="og:image" content="{{ . }}" />
    {{- end }}
    <meta property="og:site_name" content="{{ .siteTitle }}" />
    {{- if .IsPage -}}
        <meta property="article:author" content="{{ .author }}" />
        {{- with .publishDate }}
            <meta property="article:published_time" content="{{ . }}" />
        {{- end }}
        {{ with .lastMod }}
            <meta property="article:modified_time" content="{{ . }}" />
        {{- end }}
        {{- with .keywords }}
            <meta property="article:tags" content="{{ delimit . ", " }}" />
        {{- end }}
        {{- with site.RegularPages.Related . | first 5  }}
            {{- range . }}
                {{- if ne $ . }}
                <meta property="og:see_also" content="{{ .Permalink }}">
                {{- end }}
            {{- end }}
        {{- end }}
    {{- end }}
{{- end }}

{{- define "twitterCard" }}
    {{ "<!-- twitterCard -->" | safeHTML -}}
    {{ $twitterCreator := site.Params.socialCard.twitterCreator }}
    {{ $twitterSite := site.Params.socialCard.twitterSite }}
    <meta name="twitter:card" content="{{ if .cover }}summary_large_image{{ else }}summary{{ end }}" />
    <meta name="twitter:title" content="{{ .title }}" />
    <meta name="twitter:description" content="{{ .desc }}" />
    {{- with .cover }}
        <meta name="twitter:image" content="{{ . }}" />
    {{- end }}
    {{- with $twitterSite }}
        <meta name="twitter:site" content="@{{ . }}" />
    {{- end }}
    {{- with $twitterCreator }}
        <meta name="twitter:creator" content="@{{ . }}" />
    {{- end }}
{{- end }}

{{- define "schema" }}
    {{ "<!-- schema -->" | safeHTML -}}
    {{- with .title }}
        <meta itemprop="name" content="{{ . }}">
    {{- end }}
    {{- with .desc }}
        <meta itemprop="description" content="{{ trim . "\n\r\t " }}">
    {{- end }}
    {{- with .PublishDate }}
        <meta itemprop="datePublished" content="{{ . }}">
    {{- end }}
    {{- with .Lastmod }}
        <meta itemprop="dateModified" content="{{ . }}">
    {{- end }}
    {{- with .page.WordCount }}
        <meta itemprop="wordCount" content="{{ . }}">
    {{- end }}
    {{- with .cover }}
        <meta itemprop="image" content="{{ . }}">
    {{- end }}
    {{- with .keywords }}
        <meta itemprop="keywords" content="{{ delimit . `,` }}">
    {{- end -}}
{{- end }}

{{- define "jsonLD" }}
    {{ "<!-- jsonLD -->" | safeHTML -}}
    <script type="application/ld+json">
        {
            "@context": "https://schema.org",
            "@type": "Article",
            "mainEntityOfPage": {
                "@type": "WebPage",
                "@id": "{{ .Permalink | safeURL }}"
            },
            "headline": "{{ .title }}",
            {{- with .desc }}
            "description": "{{ . }}",
            {{- end }}
            {{- with .cover }}
            "image": "{{ . }}",
            {{- end }}
            {{- with .PublishDate }}
            "datePublished": "{{ . }}",
            {{- end }}
            {{- with .Lastmod }}
            "dateModified": "{{ . }}",
            {{- end }}
            {{- with .author }}
            "author": {
                "@type": "Person",
                "name": "{{ . }}"
            },
            {{- end }}
            {{- with .page.GetTerms "author"  }}
                {{ range . }}
                    "author": {
                            "@type": "Person",
                            "name": "{{ humanize .LinkTitle | title }}"
                        },
                {{- end }}
            {{- end }}
            "publisher": {
                "@type": "Organization",
                "name": "{{ .siteTitle }}",
                {{- with site.Params.logo.logomark }}
                "logo": {
                    "@type": "ImageObject",
                    "url": "{{ . | absURL }}"
                }
                {{- end }}
            }
        }
    </script>
{{- end }}