Drop glitch-style account bio fields

Upstream's implementation has been merged a while ago and is the preferred
way to set fields, as it is the only one compatible with upstream and is
more user-friendly.

This commit deletes the legacy glitch-soc FrontMatter functionality in order
to clean up the code and make it easier to maintain.

1 files changed, 0 insertions, 223 deletions

diff --git a/app/lib/frontmatter_handler.rb b/app/lib/frontmatter_handler.rb
deleted file mode 100644
index fa787630d..000000000
--- a/app/lib/frontmatter_handler.rb
+++ /dev/null
@@ -1,223 +0,0 @@
-# frozen_string_literal: true
-
-require 'singleton'
-
-#  See also `app/javascript/features/account/util/bio_metadata.js`.
-
-class FrontmatterHandler
-  include Singleton
-
-  #  CONVENIENCE FUNCTIONS  #
-
-  def self.unirex(str)
-    Regexp.new str, Regexp::MULTILINE
-  end
-  def self.rexstr(exp)
-    '(?:' + exp.source + ')'
-  end
-
-  #  CHARACTER CLASSES  #
-
-  DOCUMENT_START    = /^/
-  DOCUMENT_END      = /$/
-  ALLOWED_CHAR      =  #  c-printable` in the YAML 1.2 spec.
-    /[\t\n\r\u{20}-\u{7e}\u{85}\u{a0}-\u{d7ff}\u{e000}-\u{fffd}\u{10000}-\u{10ffff}]/u
-  WHITE_SPACE       = /[ \t]/
-  INDENTATION       = / */
-  LINE_BREAK        = /\r?\n|\r|<br\s*\/?>/
-  ESCAPE_CHAR       = /[0abt\tnvfre "\/\\N_LP]/
-  HEXADECIMAL_CHARS = /[0-9a-fA-F]/
-  INDICATOR         = /[-?:,\[\]{}&#*!|>'"%@`]/
-  FLOW_CHAR         = /[,\[\]{}]/
-
-  #  NEGATED CHARACTER CLASSES  #
-
-  NOT_WHITE_SPACE   = unirex '(?!' + rexstr(WHITE_SPACE) + ').'
-  NOT_LINE_BREAK    = unirex '(?!' + rexstr(LINE_BREAK) + ').'
-  NOT_INDICATOR     = unirex '(?!' + rexstr(INDICATOR) + ').'
-  NOT_FLOW_CHAR     = unirex '(?!' + rexstr(FLOW_CHAR) + ').'
-  NOT_ALLOWED_CHAR  = unirex '(?!' + rexstr(ALLOWED_CHAR) + ').'
-
-  #  BASIC CONSTRUCTS  #
-
-  ANY_WHITE_SPACE   = unirex rexstr(WHITE_SPACE) + '*'
-  ANY_ALLOWED_CHARS = unirex rexstr(ALLOWED_CHAR) + '*'
-  NEW_LINE          = unirex(
-    rexstr(ANY_WHITE_SPACE) + rexstr(LINE_BREAK)
-  )
-  SOME_NEW_LINES    = unirex(
-    '(?:' + rexstr(ANY_WHITE_SPACE) + rexstr(LINE_BREAK) + ')+'
-  )
-  POSSIBLE_STARTS   = unirex(
-    rexstr(DOCUMENT_START) + rexstr(/<p[^<>]*>/) + '?'
-  )
-  POSSIBLE_ENDS     = unirex(
-    rexstr(SOME_NEW_LINES) + '|' +
-    rexstr(DOCUMENT_END) + '|' +
-    rexstr(/<\/p>/)
-  )
-  CHARACTER_ESCAPE  = unirex(
-    rexstr(/\\/) +
-    '(?:' +
-      rexstr(ESCAPE_CHAR) + '|' +
-      rexstr(/x/) + rexstr(HEXADECIMAL_CHARS) + '{2}' + '|' +
-      rexstr(/u/) + rexstr(HEXADECIMAL_CHARS) + '{4}' + '|' +
-      rexstr(/U/) + rexstr(HEXADECIMAL_CHARS) + '{8}' +
-    ')'
-  )
-  ESCAPED_CHAR      = unirex(
-    rexstr(/(?!["\\])/) + rexstr(NOT_LINE_BREAK) + '|' +
-    rexstr(CHARACTER_ESCAPE)
-  )
-  ANY_ESCAPED_CHARS = unirex(
-    rexstr(ESCAPED_CHAR) + '*'
-  )
-  ESCAPED_APOS      = unirex(
-    '(?=' + rexstr(NOT_LINE_BREAK) + ')' + rexstr(/[^']|''/)
-  )
-  ANY_ESCAPED_APOS  = unirex(
-    rexstr(ESCAPED_APOS) + '*'
-  )
-  FIRST_KEY_CHAR    = unirex(
-    '(?=' + rexstr(NOT_LINE_BREAK) + ')' +
-    '(?=' + rexstr(NOT_WHITE_SPACE) + ')' +
-    rexstr(NOT_INDICATOR) + '|' +
-    rexstr(/[?:-]/) +
-    '(?=' + rexstr(NOT_LINE_BREAK) + ')' +
-    '(?=' + rexstr(NOT_WHITE_SPACE) + ')' +
-    '(?=' + rexstr(NOT_FLOW_CHAR) + ')'
-  )
-  FIRST_VALUE_CHAR  = unirex(
-    '(?=' + rexstr(NOT_LINE_BREAK) + ')' +
-    '(?=' + rexstr(NOT_WHITE_SPACE) + ')' +
-    rexstr(NOT_INDICATOR) + '|' +
-    rexstr(/[?:-]/) +
-    '(?=' + rexstr(NOT_LINE_BREAK) + ')' +
-    '(?=' + rexstr(NOT_WHITE_SPACE) + ')'
-    #  Flow indicators are allowed in values.
-  )
-  LATER_KEY_CHAR    = unirex(
-    rexstr(WHITE_SPACE) + '|' +
-    '(?=' + rexstr(NOT_LINE_BREAK) + ')' +
-    '(?=' + rexstr(NOT_WHITE_SPACE) + ')' +
-    '(?=' + rexstr(NOT_FLOW_CHAR) + ')' +
-    rexstr(/[^:#]#?/) + '|' +
-    rexstr(/:/) + '(?=' + rexstr(NOT_WHITE_SPACE) + ')'
-  )
-  LATER_VALUE_CHAR  = unirex(
-    rexstr(WHITE_SPACE) + '|' +
-    '(?=' + rexstr(NOT_LINE_BREAK) + ')' +
-    '(?=' + rexstr(NOT_WHITE_SPACE) + ')' +
-    #  Flow indicators are allowed in values.
-    rexstr(/[^:#]#?/) + '|' +
-    rexstr(/:/) + '(?=' + rexstr(NOT_WHITE_SPACE) + ')'
-  )
-
-  #  YAML CONSTRUCTS  #
-
-  YAML_START        = unirex(
-    rexstr(ANY_WHITE_SPACE) + rexstr(/---/)
-  )
-  YAML_END          = unirex(
-    rexstr(ANY_WHITE_SPACE) + rexstr(/(?:---|\.\.\.)/)
-  )
-  YAML_LOOKAHEAD    = unirex(
-    '(?=' +
-      rexstr(YAML_START) +
-      rexstr(ANY_ALLOWED_CHARS) + rexstr(NEW_LINE) +
-      rexstr(YAML_END) + rexstr(POSSIBLE_ENDS) +
-    ')'
-  )
-  YAML_DOUBLE_QUOTE = unirex(
-    rexstr(/"/) + rexstr(ANY_ESCAPED_CHARS) + rexstr(/"/)
-  )
-  YAML_SINGLE_QUOTE = unirex(
-    rexstr(/'/) + rexstr(ANY_ESCAPED_APOS) + rexstr(/'/)
-  )
-  YAML_SIMPLE_KEY   = unirex(
-    rexstr(FIRST_KEY_CHAR) + rexstr(LATER_KEY_CHAR) + '*'
-  )
-  YAML_SIMPLE_VALUE = unirex(
-    rexstr(FIRST_VALUE_CHAR) + rexstr(LATER_VALUE_CHAR) + '*'
-  )
-  YAML_KEY          = unirex(
-    rexstr(YAML_DOUBLE_QUOTE) + '|' +
-    rexstr(YAML_SINGLE_QUOTE) + '|' +
-    rexstr(YAML_SIMPLE_KEY)
-  )
-  YAML_VALUE        = unirex(
-    rexstr(YAML_DOUBLE_QUOTE) + '|' +
-    rexstr(YAML_SINGLE_QUOTE) + '|' +
-    rexstr(YAML_SIMPLE_VALUE)
-  )
-  YAML_SEPARATOR    = unirex(
-    rexstr(ANY_WHITE_SPACE) +
-    ':' + rexstr(WHITE_SPACE) +
-    rexstr(ANY_WHITE_SPACE)
-  )
-  YAML_LINE         = unirex(
-    '(' + rexstr(YAML_KEY) + ')' +
-    rexstr(YAML_SEPARATOR) +
-    '(' + rexstr(YAML_VALUE) + ')'
-  )
-
-  #  FRONTMATTER REGEX  #
-
-  YAML_FRONTMATTER  = unirex(
-    rexstr(POSSIBLE_STARTS) +
-    rexstr(YAML_LOOKAHEAD) +
-    rexstr(YAML_START) + rexstr(SOME_NEW_LINES) +
-    '(?:' +
-      '(' + rexstr(INDENTATION) + ')' +
-      rexstr(YAML_LINE) + rexstr(SOME_NEW_LINES) +
-      '(?:' +
-        '\\1' + rexstr(YAML_LINE) + rexstr(SOME_NEW_LINES) +
-      '){0,4}' +
-    ')?' +
-    rexstr(YAML_END) + rexstr(POSSIBLE_ENDS)
-  )
-
-  #  SEARCHES  #
-
-  FIND_YAML_LINES   = unirex(
-    rexstr(NEW_LINE) + rexstr(INDENTATION) + rexstr(YAML_LINE)
-  )
-
-  #  STRING PROCESSING  #
-
-  def process_string(str)
-    case str[0]
-    when '"'
-      str[1..-2]
-    when "'"
-      str[1..-2].gsub(/''/, "'")
-    else
-      str
-    end
-  end
-
-  #  BIO PROCESSING  #
-
-  def process_bio content
-    result = {
-      text: content.gsub(/&quot;/, '"').gsub(/&apos;/, "'"),
-      metadata: []
-    }
-    yaml = YAML_FRONTMATTER.match(result[:text])
-    return result unless yaml
-    yaml = yaml[0]
-    start = YAML_START =~ result[:text]
-    ending = start + yaml.length - (YAML_START =~ yaml)
-    result[:text][start..ending - 1] = ''
-    metadata = nil
-    index = 0
-    while metadata = FIND_YAML_LINES.match(yaml, index) do
-      index = metadata.end(0)
-      result[:metadata].push [
-        process_string(metadata[1]), process_string(metadata[2])
-      ]
-    end
-    return result
-  end
-
-end