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# coding: utf-8
require 'erb'
require 'open3'
require 'yaml'
require 'page_local'
class PdfPage < LocalPage
def initialize(filename)
super(filename)
end
def pdf_metadata
if @metadata.nil?
stdout, stderr, status = Open3::capture3("pdfinfo", "--", local_infile)
unless stderr.empty?
raise stderr
end
unless status.success?
raise status
end
raw_metadata = stdout.split("\n").map{|l|l.split(":", 2).map{|c|c.strip}}.to_h
# Transform the PDF property names to match our metadata names
key_map = {
"Title" => "title",
"Author" => "author",
"CreationDate" => "published",
"ModDate" => "updated",
# "Keywords" => "categories",
}
@metadata = raw_metadata.map{|k,v|[key_map[k]||k,v]}.to_h
yamlfile = local_infile.sub(/\.pdf$/, '.yaml')
if File::exist?(yamlfile)
@metadata = @metadata.merge(YAML::load(File::read(yamlfile)))
end
end
@metadata
end
def pdf_js_url
@@pdjfs ||= Config::get.url + 'pdfjs/web/viewer.html'
end
def pdf_viewer_url
@viewer_url ||= pdf_js_url + ('?file=' + URI::encode_www_form_component(pdf_js_url.route_to(local_srcurl)))
end
def local_intype
return 'markdown'
end
def local_depends
if @depends.nil?
yamlfile = local_infile.sub(/\.pdf$/, '.yaml')
metafile = File::exist?(yamlfile) ? yamlfile : File::dirname(yamlfile)
tmplfile = "tmpl/pdf.md.erb"
@depends = super.map{|k,v|[k,v.merge([metafile, tmplfile])]}.to_h
end
@depends
end
end
ERB::new(File::read("tmpl/pdf.md.erb")).def_method(PdfPage, 'local_input()', "tmpl/pdf.md.erb")
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