{{- $title := .Title | default .Site.Title -}}
{{- $desc := .Description | default .Summary | default .Site.Params.description | plainify | truncate 200 -}}
{{- $image := .Params.image | default "/images/og-default.png" -}}
{{- if not (strings.HasPrefix $image "http") -}}
  {{- $image = $image | absURL -}}
{{- end -}}

{{/* Determine card type */}}
{{- $cardType := "summary" -}}
{{- if $image -}}
  {{- $cardType = "summary_large_image" -}}
{{- end -}}

<meta name="twitter:card" content="{{ $cardType }}">
<meta name="twitter:title" content="{{ $title }}">
<meta name="twitter:description" content="{{ $desc }}">

{{- if $image }}
<meta name="twitter:image" content="{{ $image }}">
<meta name="twitter:image:alt" content="{{ $title }}">
{{- end }}