From 6c4e094c91ce143f3895550a28cf0b8057c23e57 Mon Sep 17 00:00:00 2001
From: Aditya Telange <21258296+adityatelange@users.noreply.github.com>
Date: Sun, 11 Oct 2020 16:31:13 +0530
Subject: [PATCH] templates: Add Twitter Cards, OpenGraph, Schema

This code is licensed under Apache License 2.0
and is part of https://github.com/gohugoio/hugo
---
 layouts/partials/templates/opengraph.html     | 57 +++++++++++++++++++
 layouts/partials/templates/schema.html        | 23 ++++++++
 layouts/partials/templates/twitter_cards.html | 29 ++++++++++
 3 files changed, 109 insertions(+)
 create mode 100644 layouts/partials/templates/opengraph.html
 create mode 100644 layouts/partials/templates/schema.html
 create mode 100644 layouts/partials/templates/twitter_cards.html

diff --git a/layouts/partials/templates/opengraph.html b/layouts/partials/templates/opengraph.html
new file mode 100644
index 00000000..07d9775d
--- /dev/null
+++ b/layouts/partials/templates/opengraph.html
@@ -0,0 +1,57 @@
+<meta property="og:title" content="{{ .Title }}" />
+<meta property="og:description" content="{{ with .Description }}{{ . }}{{ else }}{{if .IsPage}}{{ .Summary }}{{ else }}{{ with .Site.Params.description }}{{ . }}{{ end }}{{ end }}{{ end }}" />
+<meta property="og:type" content="{{ if .IsPage }}article{{ else }}website{{ end }}" />
+<meta property="og:url" content="{{ .Permalink }}" />
+{{ with $.Params.images }}{{ range first 6 . -}}
+<meta property="og: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 property="og:image" content="{{ $featured.Permalink }}"/>
+{{ else -}}
+{{- with $.Site.Params.images -}}
+<meta property="og:image" content="{{ index . 0 | absURL }}"/>
+{{ end }}{{ end }}{{ end }}
+
+{{- $iso8601 := "2006-01-02T15:04:05-07:00" -}}
+{{- if .IsPage }}
+{{- if not .PublishDate.IsZero }}<meta property="article:published_time" {{ .PublishDate.Format $iso8601 | printf "content=%q" | safeHTMLAttr }} />
+{{ else if not .Date.IsZero }}<meta property="article:published_time" {{ .Date.Format $iso8601 | printf "content=%q" | safeHTMLAttr }} />
+{{ end }}
+{{- if not .Lastmod.IsZero }}<meta property="article:modified_time" {{ .Lastmod.Format $iso8601 | printf "content=%q" | safeHTMLAttr }} />{{ end }}
+{{- else }}
+{{- if not .Date.IsZero }}<meta property="og:updated_time" {{ .Lastmod.Format $iso8601 | printf "content=%q" | safeHTMLAttr }} />
+{{- end }}
+{{- end }}{{/* .IsPage */}}
+
+{{- with .Params.audio }}<meta property="og:audio" content="{{ . }}" />{{ end }}
+{{- with .Params.locale }}<meta property="og:locale" content="{{ . }}" />{{ end }}
+{{- with .Site.Params.title }}<meta property="og:site_name" content="{{ . }}" />{{ end }}
+{{- with .Params.videos }}
+{{- range . }}
+<meta property="og:video" content="{{ . | absURL }}" />
+{{ end }}{{ end }}
+
+{{- /* If it is part of a series, link to related articles */}}
+{{- $permalink := .Permalink }}
+{{- $siteSeries := .Site.Taxonomies.series }}{{ with .Params.series }}
+{{- range $name := . }}
+  {{- $series := index $siteSeries $name }}
+  {{- range $page := first 6 $series.Pages }}
+    {{- if ne $page.Permalink $permalink }}<meta property="og:see_also" content="{{ $page.Permalink }}" />{{ end }}
+  {{- end }}
+{{ end }}{{ end }}
+
+{{- if .IsPage }}
+{{- range .Site.Authors }}{{ with .Social.facebook }}
+<meta property="article:author" content="https://www.facebook.com/{{ . }}" />{{ end }}{{ with .Site.Social.facebook }}
+<meta property="article:publisher" content="https://www.facebook.com/{{ . }}" />{{ end }}
+<meta property="article:section" content="{{ .Section }}" />
+{{- with .Params.tags }}{{ range first 6 . }}
+<meta property="article:tag" content="{{ . }}" />{{ end }}{{ end }}
+{{- end }}{{ end }}
+
+{{- /* Facebook Page Admin ID for Domain Insights */}}
+{{- with .Site.Social.facebook_admin }}<meta property="fb:admins" content="{{ . }}" />{{ end }}
diff --git a/layouts/partials/templates/schema.html b/layouts/partials/templates/schema.html
new file mode 100644
index 00000000..0cbae153
--- /dev/null
+++ b/layouts/partials/templates/schema.html
@@ -0,0 +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 }}
+<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 }}">
+{{ 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 }}
diff --git a/layouts/partials/templates/twitter_cards.html b/layouts/partials/templates/twitter_cards.html
new file mode 100644
index 00000000..cbe2430b
--- /dev/null
+++ b/layouts/partials/templates/twitter_cards.html
@@ -0,0 +1,29 @@
+{{- with $.Params.images -}}
+<meta name="twitter:card" content="summary_large_image"/>
+<meta name="twitter:image" content="{{ index . 0 | absURL }}"/>
+{{ else -}}
+{{- $images := $.Resources.ByType "image" -}}
+{{- $featured := $images.GetMatch "*feature*" -}}
+{{- if not $featured }}{{ $featured = $images.GetMatch "{*cover*,*thumbnail*}" }}{{ end -}}
+{{- with $featured -}}
+<meta name="twitter:card" content="summary_large_image"/>
+<meta name="twitter:image" content="{{ $featured.Permalink }}"/>
+{{- else -}}
+{{- with $.Site.Params.images -}}
+<meta name="twitter:card" content="summary_large_image"/>
+<meta name="twitter:image" content="{{ index . 0 | absURL }}"/>
+{{ else -}}
+<meta name="twitter:card" content="summary"/>
+{{- end -}}
+{{- end -}}
+{{- end }}
+<meta name="twitter:title" content="{{ .Title }}"/>
+<meta name="twitter:description" content="{{ with .Description }}{{ . }}{{ else }}{{if .IsPage}}{{ .Summary }}{{ else }}{{ with .Site.Params.description }}{{ . }}{{ end }}{{ end }}{{ end -}}"/>
+{{ with .Site.Social.twitter -}}
+<meta name="twitter:site" content="@{{ . }}"/>
+{{ end -}}
+{{ range .Site.Authors }}
+{{ with .twitter -}}
+<meta name="twitter:creator" content="@{{ . }}"/>
+{{ end -}}
+{{ end -}}
\ No newline at end of file