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30990006a9
This reduces chances of errors where consumers of strings mutate inputs and reduces memory usage of the app. Test suite passes now, but there may be some stuff left, so we will run a few sites on a branch prior to merging
110 lines
2.6 KiB
Ruby
110 lines
2.6 KiB
Ruby
# frozen_string_literal: true
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require_dependency 'pretty_text'
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# A very simple formatter for imported emails
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class EmailCook
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def self.url_regexp
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@url_regexp ||= /((?:https?:(?:\/{1,3}|[a-z0-9%])|www\d{0,3}[.])(?:[^\s()<>]+|\([^\s()<>]+\))+(?:\([^\s()<>]+\)|[^`!()\[\]{};:'".,<>?«»“”‘’\s]))/
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end
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def self.raw_regexp
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@raw_regexp ||= /^\[plaintext\]$\n(.*)\n^\[\/plaintext\]$(?:\s^\[attachments\]$\n(.*)\n^\[\/attachments\]$)?(?:\s^\[elided\]$\n(.*)\n^\[\/elided\]$)?/m
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end
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def initialize(raw)
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@raw = raw
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@body, @attachment_html, @elided = @raw.scan(EmailCook.raw_regexp).first
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end
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def add_quote(result, buffer)
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if buffer.present?
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return if buffer =~ /\A(<br>)+\z$/
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result << "<blockquote>#{buffer}</blockquote>"
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end
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end
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def link_string!(line, unescaped_line)
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unescaped_line = unescaped_line.strip
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unescaped_line.scan(EmailCook.url_regexp).each do |m|
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url = m[0]
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if unescaped_line == url
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# this could be oneboxed
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val = %|<a href="#{url}" class="onebox" target="_blank">#{url}</a>|
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else
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val = %|<a href="#{url}">#{url}</a>|
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end
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line.gsub!(url, val)
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end
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end
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def htmlify(text)
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result = +""
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quote_buffer = +""
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in_text = false
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in_quote = false
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text.each_line do |line|
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# replace indentation with non-breaking spaces
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line.sub!(/^\s{2,}/) { |s| "\u00A0" * s.length }
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if line =~ /^\s*>/
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in_quote = true
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line.sub!(/^[\s>]*/, '')
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unescaped_line = line
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line = CGI.escapeHTML(line)
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link_string!(line, unescaped_line)
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quote_buffer << line << "<br>"
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elsif in_quote
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add_quote(result, quote_buffer)
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quote_buffer = ""
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in_quote = false
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else
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sz = line.size
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unescaped_line = line
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line = CGI.escapeHTML(line)
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link_string!(line, unescaped_line)
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if sz < 60
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if in_text && line == "\n"
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result << "<br>"
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end
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result << line
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result << "<br>"
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in_text = false
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else
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result << line
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in_text = true
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end
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end
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end
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if in_quote && quote_buffer.present?
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add_quote(result, quote_buffer)
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end
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result.gsub!(/(<br>\n*){3,10}/, '<br><br>')
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result
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end
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def cook(opts = {})
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# fallback to PrettyText if we failed to detect a body
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return PrettyText.cook(@raw, opts) if @body.nil?
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result = htmlify(@body)
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result << "\n<br>" << @attachment_html if @attachment_html.present?
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result << "\n<br><br>" << Email::Receiver.elided_html(htmlify(@elided)) if @elided.present?
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result
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end
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end
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