mastodon/config/initializers/twitter_regex.rb

module Twitter::TwitterText
  class Configuration
    def emoji_parsing_enabled
      false
    end
  end

  class Regex
    REGEXEN[:valid_general_url_path_chars] = /[^\p{White_Space}<>()?]/iou
    REGEXEN[:valid_url_path_ending_chars] = /[^\p{White_Space}()?!*"'「」<>;:=,.$%\[\]~&|@]|(?:#{REGEXEN[:valid_url_balanced_parens]})/iou
    REGEXEN[:valid_url_balanced_parens] = /
      \(
        (?:
          #{REGEXEN[:valid_general_url_path_chars]}+
          |
          # allow one nested level of balanced parentheses
          (?:
            #{REGEXEN[:valid_general_url_path_chars]}*
            \(
              #{REGEXEN[:valid_general_url_path_chars]}+
            \)
            #{REGEXEN[:valid_general_url_path_chars]}*
          )
        )
      \)
    /iox
    UCHARS = '\u{A0}-\u{D7FF}\u{F900}-\u{FDCF}\u{FDF0}-\u{FFEF}\u{10000}-\u{1FFFD}\u{20000}-\u{2FFFD}\u{30000}-\u{3FFFD}\u{40000}-\u{4FFFD}\u{50000}-\u{5FFFD}\u{60000}-\u{6FFFD}\u{70000}-\u{7FFFD}\u{80000}-\u{8FFFD}\u{90000}-\u{9FFFD}\u{A0000}-\u{AFFFD}\u{B0000}-\u{BFFFD}\u{C0000}-\u{CFFFD}\u{D0000}-\u{DFFFD}\u{E1000}-\u{EFFFD}\u{E000}-\u{F8FF}\u{F0000}-\u{FFFFD}\u{100000}-\u{10FFFD}'
    REGEXEN[:valid_url_query_chars] = %r{[a-z0-9!?*'();:&=+$/%#\[\]\-_.,~|@\^#{UCHARS}]}iou
    REGEXEN[:valid_url_query_ending_chars] = %r{[a-z0-9_&=#/\-#{UCHARS}]}iou
    REGEXEN[:valid_url_path] = %r{(?:
      (?:
        #{REGEXEN[:valid_general_url_path_chars]}*
        (?:#{REGEXEN[:valid_url_balanced_parens]} #{REGEXEN[:valid_general_url_path_chars]}*)*
        #{REGEXEN[:valid_url_path_ending_chars]}
      )|(?:#{REGEXEN[:valid_general_url_path_chars]}+/)
    )}iox
    REGEXEN[:valid_url] = %r{
      (                                                                                     #   $1 total match
        (#{REGEXEN[:valid_url_preceding_chars]})                                            #   $2 Preceding character
        (                                                                                   #   $3 URL
          ((?:https?|dat|dweb|ipfs|ipns|ssb|gopher|gemini)://)?                             #   $4 Protocol (optional)
          (#{REGEXEN[:valid_domain]})                                                       #   $5 Domain(s)
          (?::(#{REGEXEN[:valid_port_number]}))?                                            #   $6 Port number (optional)
          (/#{REGEXEN[:valid_url_path]}*)?                                                  #   $7 URL Path and anchor
          (\?#{REGEXEN[:valid_url_query_chars]}*#{REGEXEN[:valid_url_query_ending_chars]})? #   $8 Query String
        )
      )
    }iox
    REGEXEN[:validate_nodeid] = /(?:
      #{REGEXEN[:validate_url_unreserved]}|
      #{REGEXEN[:validate_url_pct_encoded]}|
      [!$()*+,;=]
    )/iox
    REGEXEN[:validate_resid] = /(?:
      #{REGEXEN[:validate_url_unreserved]}|
      #{REGEXEN[:validate_url_pct_encoded]}|
      #{REGEXEN[:validate_url_sub_delims]}
    )/iox
    REGEXEN[:valid_extended_uri] = %r{
      (                                                                                 #   $1 total match
        (#{REGEXEN[:valid_url_preceding_chars]})                                        #   $2 Preceding character
        (                                                                               #   $3 URL
          (
            (xmpp:)                                                                           # Protocol
            (//#{REGEXEN[:validate_nodeid]}+@#{REGEXEN[:valid_domain]}/)?                     # Authority (optional)
            (#{REGEXEN[:validate_nodeid]}+@)?                                                 # Username in path (optional)
            (#{REGEXEN[:valid_domain]})                                                       # Domain in path
            (/#{REGEXEN[:validate_resid]}+)?                                                  # Resource in path (optional)
            (\?#{REGEXEN[:valid_url_query_chars]}*#{REGEXEN[:valid_url_query_ending_chars]})? # Query String
          ) | (
            (magnet:)                                                                         # Protocol
            (\?#{REGEXEN[:valid_url_query_chars]}*#{REGEXEN[:valid_url_query_ending_chars]})  # Query String
          )
        )
      )
    }iox
  end
end