discourse/lib/theme_settings_parser.rb
Sam Saffron 30990006a9 DEV: enable frozen string literal on all files
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
2019-05-13 09:31:32 +08:00

76 lines
2.1 KiB
Ruby

# frozen_string_literal: true
class ThemeSettingsParser
class InvalidYaml < StandardError; end
def initialize(setting_field)
@setting_field = setting_field
@types = ThemeSetting.types
end
def extract_description(desc)
return desc if desc.is_a?(String)
if desc.is_a?(Hash)
default_locale = SiteSetting.default_locale.to_sym
fallback_locale = desc.keys.find { |key| I18n.locale_available?(key) }
locale = desc[I18n.locale] || desc[default_locale] || desc[:en] || desc[fallback_locale]
locale if locale.is_a?(String)
end
end
def create_opts(default, type, raw_opts = {})
opts = {}
opts[:description] = extract_description(raw_opts[:description])
if type == @types[:enum]
choices = raw_opts[:choices]
choices = [] unless choices.is_a?(Array)
choices << default unless choices.include?(default)
opts[:choices] = choices
end
if [@types[:integer], @types[:string], @types[:float]].include?(type)
opts[:max] = raw_opts[:max].is_a?(Numeric) ? raw_opts[:max] : Float::INFINITY
opts[:min] = raw_opts[:min].is_a?(Numeric) ? raw_opts[:min] : -Float::INFINITY
end
if raw_opts[:list_type]
opts[:list_type] = raw_opts[:list_type]
end
opts[:textarea] = !!raw_opts[:textarea]
opts
end
def load
return if @setting_field.value.blank?
begin
parsed = YAML.safe_load(@setting_field.value)
rescue Psych::SyntaxError, Psych::DisallowedClass => e
raise InvalidYaml.new(e.message)
end
raise InvalidYaml.new(I18n.t("themes.settings_errors.invalid_yaml")) unless parsed.is_a?(Hash)
parsed.deep_symbolize_keys!
parsed.each_pair do |setting, value|
if (type = ThemeSetting.guess_type(value)).present?
result = [setting, value, type, create_opts(value, type)]
elsif (hash = value).is_a?(Hash)
default = hash[:default]
type = hash.key?(:type) ? @types[hash[:type]&.to_sym] : ThemeSetting.guess_type(default)
result = [setting, default, type, create_opts(default, type, hash)]
else
result = [setting, value, nil, {}]
end
yield(*result)
end
end
end