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# frozen_string_literal: true
module HTML
class Pipeline
# HTML Filter for replacing http references to :http_url with https versions.
# Subdomain references are not rewritten.
#
# Context options:
# :http_url - The HTTP url to force HTTPS. Falls back to :base_url
class HttpsFilter < Filter
def call
doc.css(%(a[href^="#{http_url}"])).each do |element|
element['href'] = element['href'].sub(/^http:/, 'https:')
end
doc
end
# HTTP url to replace. Falls back to :base_url
def http_url
context[:http_url] || context[:base_url]
end
# Raise error if :http_url undefined
def validate
needs :http_url unless http_url
end
end
end
end
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