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seirdy.one/layouts/partials/head.html
Rohan Kumar 6d066f8711
Support page-specific open graph images
Allow specifying open graph images for individual pages. Change default
site-wide open graph image alt-text to an empty string since the default
image only has visual value, and is better off hidden from assistive
technologies.

Set an open graph image for two articles.
2022-05-18 09:00:05 -07:00

74 lines
4.7 KiB
HTML

<head>
{{- $canonicalRelPermalink := .RelPermalink | replaceRE "^/~seirdy/" "/" }}
<meta charset="utf-8">
<meta name="disabled-adaptations" content="watch"><meta name="viewport" content="width=device-width, initial-scale=1.0">
{{ if or (eq site.BaseURL site.Params.CanonicalBaseURL) (in site.BaseURL "wgq3bd2kqoybhstp77i3wrzbfnsyd27wt34psaja4grqiezqircorkyd.onion") -}}
<meta name="robots" content="index,follow,max-image-preview:large,max-snippet=-1">
{{ end -}}
<link href="{{ .Site.Params.CanonicalBaseURL }}{{ $canonicalRelPermalink }}" rel="canonical">
<link href="{{ .Site.Params.WebmentionEndpoint }}" rel="webmention">
{{ $webmanifest := resources.Get "/manifest.webmanifest" | resources.ExecuteAsTemplate "manifest.webmanifest" . | resources.Minify | resources.Fingerprint "md5" -}}
{{- printf `<link href="%s" rel="manifest">` $webmanifest.RelPermalink | safeHTML }}
<link rel="alternate" type="application/rss+xml" href="{{ site.BaseURL }}posts/index.xml" title="{{ $.Site.Title }}">
<title>{{ .Title }}{{ if and (lt (len .Title) 54) (ne $canonicalRelPermalink "/") }} - Seirdy{{ end }}</title>
{{ $description := .Site.Params.Description -}}
{{- if .Params.description -}}
{{- $description = .Params.Description -}}
{{- else if eq $canonicalRelPermalink "/posts.html" -}}
{{- $description = "All the posts on Seirdy's Home" -}}
{{- end -}}
<meta name="description" content="{{ $description }}">
<meta name="author" content="{{ .Site.Author.name }}">
<meta property="article:author" content="{{ .Site.Author.name }}">
{{ if gt .Date 0 -}}
<meta property="article:published_time" content="{{ .Date.Format "2006-01-02T15:04:05Z07:00" }}">
{{ end -}}
{{ if lt .Date .Lastmod -}}
<meta property="article:modified_time" content="{{ .Lastmod.Format "2006-01-02T15:04:05Z07:00" }}">
{{- end -}}
<!--the Tor Browser's safest setting disables SVGs but still downloads them to avoid fingerprinting-->
{{ if not (in site.BaseURL ".onion") -}}
{{ $icon_svg := resources.Get "/favicon.svg" | resources.Fingerprint "md5" }}
{{- printf `<link rel="icon" sizes="any" href="%s" type="image/svg+xml">` $icon_svg.RelPermalink | safeHTML }}
{{- end }}
{{ $icon_192 := resources.Get "/apple-touch-icon.png" | resources.Fingerprint "md5" }}
{{- printf `<link rel="icon" sizes="192x192" href="%s" type="image/png">` $icon_192.RelPermalink | safeHTML -}}
{{ $favicon := resources.Get "/favicon.png" -}}
{{ $favicon_base64 := $favicon.Content | base64Encode }}
{{ printf `<link rel="icon" sizes="32x32" href="data:image/png;base64,%s" type="image/png">` $favicon_base64 | safeHTML }}
<meta name="color-scheme" content="light dark">
<meta name="format-detection" content="telephone=no"><!-- Why does apple do this -->
<meta name="theme-color" content="#111" media="(prefers-color-scheme:dark)">
<meta name="theme-color" content="#fff" media="(prefers-color-scheme:light)">
<!-- inline CSS; remember to allow it with a hash in the CSP -->
{{- $resources := slice -}}
{{- $resources = $resources | append (resources.Get "/css/main.css") -}}
{{ $dark := .Site.Params.dark | default "auto" -}}
{{- if not (eq $dark "off") -}}
{{ $resources = $resources | append (resources.Get "css/dark.css" | resources.ExecuteAsTemplate "dark.css" .) -}}
{{- end -}}
{{ $resources = $resources | append (resources.Get "css/print.css" | resources.ExecuteAsTemplate "print.css" .) -}}
{{- $css := $resources | resources.Concat "css/style.css" | minify -}}
<style>{{ $css.Content | safeCSS }}</style>
<meta property="og:title" content="{{ .Title }}">
<meta property="og:site_name" content="{{ $.Site.Title }}">
{{- if not (or (ne "page" .Kind) (eq $canonicalRelPermalink "/bookmarks.html") (eq $canonicalRelPermalink "/posts.html")) }}
<meta property="og:type" content="article">
{{- end -}}
<!-- ANOTHER meta image?! When will it end? -->
{{- $og_image := resources.Get "/favicon512.png" | resources.Fingerprint "md5" -}}
{{- $og_image_alt := "" -}}<!--Default open graph image is purely decorative and visual, so it should be hidden from assistive technologies.-->
{{- with .Params.image -}}
{{- $og_image = resources.Get (printf "/p/%s" . ) | resources.Fingerprint "md5" -}}
{{- end -}}
{{- with .Params.image_alt -}}
{{- $og_image_alt = . -}}
{{- end }}
{{ printf `<meta property="og:image" content="%s">` $og_image.Permalink | safeHTML }}
<meta property="og:image:type" content="image/png">
<meta property="og:image:height" content="{{ $og_image.Height }}"><meta property="og:image:width" content="{{ $og_image.Width }}">
<meta property="og:image:alt" content="{{ $og_image_alt }}">
<meta property="og:url" content="{{ .Site.Params.CanonicalBaseURL }}{{ $canonicalRelPermalink }}">
<meta property="og:description" content="{{ $description }}">
{{ hugo.Generator | replaceRE " />" ">" | safeHTML}}
</head>