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{{- $url := default "https://www.gutenberg.org/files/98/old/2city12p.pdf" (.Get "url" | default (.Get 0)) -}}
{{- $title := default "Attachment" (.Get "title" | default (.Get 1)) -}}
{{- $caption := default $title (.Get "caption" | default (.Get 2)) -}}
{{- $remote := default "" (.Get "remote" | default (.Get 3)) -}}
{{- $data := "" -}}
{{- $cache := "" -}}
{{- $author := .Page.Section -}}
{{- $extension := path.Ext $url -}}
{{- $immutable := print $url | anchorize -}}
{{- $localFile := path.Join "public/" $url -}}
{{- $type := "application/octet-stream" -}}
{{- $storage := print $author "/media/" $immutable $extension -}}
{{- $cached := fileExists (path.Join "public/" $storage) -}}
{{- if not $cached -}}
{{- with $remote := cond (default true $.Page.Site.Params.site.offline) false (resources.GetRemote $url) -}}
{{- with .Err -}}
{{- if not (fileExists $localFile) -}}
{{- $caption = "No local attachment data found for source" -}}
{{- warnf "Attachment local fetch error: %s" $url -}}
{{- end -}}
{{- else -}}
{{- $type = $remote.MediaType -}}
{{- $cache = $remote | resources.Copy $storage -}}
{{- $cache = $cache.Permalink -}}
{{- end -}}
{{- else -}}
{{- $caption = "Unable to load remote source data" -}}
{{- warnf "Attachment remote fetch error: %s" $url -}}
{{- end -}}
{{- else -}}
{{- with $cache = resources.Get (path.Join "public/" $storage) -}}
{{- $type = .MediaType -}}
{{- $cache = print ("" | absURL) (strings.TrimLeft "public" $cache) -}}
{{- end -}}
{{- end -}}
{{- $data := or $cache $url -}}
{{- if $remote -}}
{{- $data = $url -}}
{{- end -}}
<document-attachment title="{{ $title }}">
<object type="{{ $type }}" data="{{ $data }}">
<p>
Your browser does not support the <code>{{ $type }}</code> plugin. Here's a
<a rel="canonical" href="{{ $data }}">link to the file</a> instead.
</p>
</object>
<footer>
{{ $caption | markdownify }}
<br />
Index: {{ with $cache }} {{ print "[Cache](" $cache ")" | markdownify }} · {{ end }}
{{ print "[Source](" $url ")" | markdownify }}
</footer>
</document-attachment>
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