def mail_to(email_address, name = nil, html_options = {})
email_address = html_escape(email_address)
html_options = html_options.stringify_keys
encode = html_options.delete("encode").to_s
cc, bcc, subject, body = html_options.delete("cc"), html_options.delete("bcc"), html_options.delete("subject"), html_options.delete("body")
extras = []
extras << "cc=#{Rack::Utils.escape(cc).gsub("+", "%20")}" unless cc.nil?
extras << "bcc=#{Rack::Utils.escape(bcc).gsub("+", "%20")}" unless bcc.nil?
extras << "body=#{Rack::Utils.escape(body).gsub("+", "%20")}" unless body.nil?
extras << "subject=#{Rack::Utils.escape(subject).gsub("+", "%20")}" unless subject.nil?
extras = extras.empty? ? '' : '?' + html_escape(extras.join('&'))
email_address_obfuscated = email_address.dup
email_address_obfuscated.gsub!(/@/, html_options.delete("replace_at")) if html_options.has_key?("replace_at")
email_address_obfuscated.gsub!(/\./, html_options.delete("replace_dot")) if html_options.has_key?("replace_dot")
string = ''
if encode == "javascript"
"document.write('#{content_tag("a", name || email_address_obfuscated.html_safe, html_options.merge("href" => "mailto:#{email_address}#{extras}".html_safe))}');".each_byte do |c|
string << sprintf("%%%x", c)
end
"<script type=\"#{Mime::JS}\">eval(decodeURIComponent('#{string}'))</script>".html_safe
elsif encode == "hex"
email_address_encoded = ''
email_address_obfuscated.each_byte do |c|
email_address_encoded << sprintf("&#%d;", c)
end
protocol = 'mailto:'
protocol.each_byte { |c| string << sprintf("&#%d;", c) }
email_address.each_byte do |c|
char = c.chr
string << (char =~ /\w/ ? sprintf("%%%x", c) : char)
end
content_tag "a", name || email_address_encoded.html_safe, html_options.merge("href" => "#{string}#{extras}".html_safe)
else
content_tag "a", name || email_address_obfuscated.html_safe, html_options.merge("href" => "mailto:#{email_address}#{extras}".html_safe)
end
end