94 lines
2.1 KiB
Ruby
94 lines
2.1 KiB
Ruby
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# frozen_string_literal: true
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module Onebox
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class OpenGraph
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attr_reader :data
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def initialize(doc)
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@data = extract(doc)
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end
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def title
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get(:title, 80)
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end
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def title_attr
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!title.nil? ? "title='#{title}'" : ""
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end
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def secure_image_url
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secure_url = URI(get(:image))
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secure_url.scheme = 'https'
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secure_url.to_s
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end
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def method_missing(attr, *args, &block)
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value = get(attr, *args)
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return nil if Onebox::Helpers::blank?(value)
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method_name = attr.to_s
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if method_name.end_with?(*integer_suffixes)
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value.to_i
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elsif method_name.end_with?(*url_suffixes)
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result = Onebox::Helpers.normalize_url_for_output(value)
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result unless Onebox::Helpers::blank?(result)
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else
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value
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end
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end
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def get(attr, length = nil, sanitize = true)
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return nil if Onebox::Helpers::blank?(data)
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value = data[attr]
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return nil if Onebox::Helpers::blank?(value)
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value = html_entities.decode(value)
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value = Sanitize.fragment(value) if sanitize
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value.strip!
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value = Onebox::Helpers.truncate(value, length) unless length.nil?
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value
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end
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private
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def integer_suffixes
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['width', 'height']
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end
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def url_suffixes
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['url', 'image', 'video']
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end
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def html_entities
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@html_entities ||= HTMLEntities.new
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end
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def extract(doc)
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return {} if Onebox::Helpers::blank?(doc)
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data = {}
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doc.css('meta').each do |m|
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if (m["property"] && m["property"][/^(?:og|article|product):(.+)$/i]) || (m["name"] && m["name"][/^(?:og|article|product):(.+)$/i])
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value = (m["content"] || m["value"]).to_s
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data[$1.tr('-:', '_').to_sym] ||= value unless Onebox::Helpers::blank?(value)
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end
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end
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# Attempt to retrieve the title from the meta tag
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title_element = doc.at_css('title')
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if title_element && title_element.text
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data[:title] ||= title_element.text unless Onebox::Helpers.blank?(title_element.text)
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end
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data
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end
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end
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end
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