class Byebug::CatchCommand

def description
  prettify <<-EOD
    cat[ch][ (off|<exception>[ off])]
    "catch" lists catchpoints.
    "catch off" deletes all catchpoints.
    "catch <exception>" enables handling <exception>.
    "catch <exception> off" disables handling <exception>.
  EOD
end

def execute
  ex = @match[1]
  return info_catch unless ex
  cmd = @match[2]
  unless cmd
    if 'off' == ex
      Byebug.catchpoints.clear if
        confirm(pr('catch.confirmations.delete_all'))
      return
    end
    is_class = bb_eval("#{ex.is_a?(Class)}")
    puts pr('catch.errors.not_class', class: ex) unless is_class
    Byebug.add_catchpoint(ex)
    return puts pr('catch.catching', exception: ex)
  end
  if cmd == 'off'
    exists = Byebug.catchpoints.member?(ex)
    return errmsg pr('catch.errors.not_found', exception: ex) unless exists
    Byebug.catchpoints.delete(ex)
    return errmsg pr('catch.errors.removed', exception: ex)
  end
  errmsg pr('catch.errors.off', off: cmd)
end

def names
  %w(catch)
end

def regexp
  /^\s* cat(?:ch)? (?:\s+(\S+))? (?:\s+(off))? \s*$/x
end