require_dependency 'enum' require_dependency 'site_settings/db_provider' module SiteSettingExtension # part 1 of refactor, centralizing the dependency here def provider=(val) @provider = val refresh! end def provider @provider ||= SiteSettings::DbProvider.new(SiteSetting) end def types @types ||= Enum.new(:string, :time, :fixnum, :float, :bool, :null, :enum, :list, :url_list, :host_list) end def mutex @mutex ||= Mutex.new end def current @containers ||= {} @containers[provider.current_site] ||= {} end def defaults @defaults ||= {} end def categories @categories ||= {} end def enums @enums ||= {} end def static_types @static_types ||= {} end def choices @choices ||= {} end def shadowed_settings @shadowed_settings ||= [] end def hidden_settings @hidden_settings ||= [] end def refresh_settings @refresh_settings ||= [] end def previews @previews ||= {} end def validators @validators ||= {} end def setting(name_arg, default = nil, opts = {}) name = name_arg.to_sym mutex.synchronize do self.defaults[name] = default categories[name] = opts[:category] || :uncategorized current_value = current.has_key?(name) ? current[name] : default if enum = opts[:enum] enums[name] = enum.is_a?(String) ? enum.constantize : enum opts[:type] ||= :enum end if new_choices = opts[:choices] if String === new_choices new_choices = eval(new_choices) end choices.has_key?(name) ? choices[name].concat(new_choices) : choices[name] = new_choices end if type = opts[:type] static_types[name.to_sym] = type.to_sym end if opts[:hidden] hidden_settings << name end # You can "shadow" a site setting with a GlobalSetting. If the GlobalSetting # exists it will be used instead of the setting and the setting will be hidden. # Useful for things like API keys on multisite. if opts[:shadowed_by_global] && GlobalSetting.respond_to?(name) hidden_settings << name shadowed_settings << name current_value = GlobalSetting.send(name) end if opts[:refresh] refresh_settings << name end if opts[:preview] previews[name] = opts[:preview] end opts[:validator] = opts[:validator].try(:constantize) type = opts[:type] || get_data_type(name, defaults[name]) if validator_type = opts[:validator] || validator_for(type) validators[name] = { class: validator_type, opts: opts } end current[name] = current_value setup_methods(name) end end # just like a setting, except that it is available in javascript via DiscourseSession def client_setting(name, default = nil, opts = {}) setting(name, default, opts) @client_settings ||= [] @client_settings << name end def client_settings @client_settings ||= [] end def settings_hash result = {} @defaults.each do |s, _| result[s] = send(s).to_s end result end def client_settings_json Rails.cache.fetch(SiteSettingExtension.client_settings_cache_key, expires_in: 30.minutes) do client_settings_json_uncached end end def client_settings_json_uncached MultiJson.dump(Hash[*@client_settings.map{|n| [n, self.send(n)]}.flatten]) end # Retrieve all settings def all_settings(include_hidden=false) @defaults .reject{|s, _| hidden_settings.include?(s) && !include_hidden} .map do |s, v| value = send(s) type = types[get_data_type(s, value)] opts = { setting: s, description: description(s), default: v.to_s, type: type.to_s, value: value.to_s, category: categories[s], preview: previews[s] } opts.merge!({valid_values: enum_class(s).values, translate_names: enum_class(s).translate_names?}) if type == :enum opts[:choices] = choices[s] if choices.has_key? s opts end end def description(setting) I18n.t("site_settings.#{setting}") end def self.client_settings_cache_key # NOTE: we use the git version in the key to ensure # that we don't end up caching the incorrect version # in cases where we are cycling unicorns "client_settings_json_#{Discourse.git_version}" end # refresh all the site settings def refresh! mutex.synchronize do ensure_listen_for_changes old = current new_hash = Hash[*(provider.all.map{ |s| [s.name.intern, convert(s.value,s.data_type)] }.to_a.flatten)] # add defaults, cause they are cached new_hash = defaults.merge(new_hash) # add shadowed shadowed_settings.each do |ss| new_hash[ss] = GlobalSetting.send(ss) end changes, deletions = diff_hash(new_hash, old) changes.each do |name, val| current[name] = val end deletions.each do |name, val| current[name] = defaults[name] end clear_cache! end end def ensure_listen_for_changes unless @subscribed MessageBus.subscribe("/site_settings") do |message| process_message(message) end @subscribed = true end end def process_message(message) data = message.data if data["process"] != process_id begin @last_message_processed = message.global_id MessageBus.on_connect.call(message.site_id) refresh! ensure MessageBus.on_disconnect.call(message.site_id) end end end def diags { last_message_processed: @last_message_processed } end def process_id @process_id ||= SecureRandom.uuid end def after_fork @process_id = nil ensure_listen_for_changes end def remove_override!(name) provider.destroy(name) current[name] = defaults[name] clear_cache! end def add_override!(name, val) type = get_data_type(name, defaults[name]) if type == types[:bool] && val != true && val != false val = (val == "t" || val == "true") ? 't' : 'f' end if type == types[:fixnum] && !val.is_a?(Fixnum) val = val.to_i end if type == types[:null] && val != '' type = get_data_type(name, val) end if type == types[:enum] raise Discourse::InvalidParameters.new(:value) unless enum_class(name).valid_value?(val) end if v = validators[name] validator = v[:class].new(v[:opts]) unless validator.valid_value?(val) raise Discourse::InvalidParameters.new(validator.error_message) end end provider.save(name, val, type) current[name] = convert(val, type) clear_cache! end def notify_changed! MessageBus.publish('/site_settings', {process: process_id}) end def has_setting?(name) defaults.has_key?(name.to_sym) || defaults.has_key?("#{name}?".to_sym) end def requires_refresh?(name) refresh_settings.include?(name.to_sym) end def is_valid_data?(name, value) valid = true type = get_data_type(name, defaults[name.to_sym]) if type == types[:fixnum] # validate fixnum valid = false unless value.to_i.is_a?(Fixnum) end return valid end def filter_value(name, value) # filter domain name if %w[disabled_image_download_domains onebox_domains_whitelist exclude_rel_nofollow_domains email_domains_blacklist email_domains_whitelist white_listed_spam_host_domains].include? name domain_array = [] value.split('|').each { |url| domain_array.push(get_hostname(url)) } value = domain_array.join("|") end value end def set(name, value) if has_setting?(name) && is_valid_data?(name, value) value = filter_value(name, value) self.send("#{name}=", value) Discourse.request_refresh! if requires_refresh?(name) else raise ArgumentError.new("Either no setting named '#{name}' exists or value provided is invalid") end end protected def clear_cache! SiteText.text_for_cache.clear Rails.cache.delete(SiteSettingExtension.client_settings_cache_key) end def diff_hash(new_hash, old) changes = [] deletions = [] new_hash.each do |name, value| changes << [name,value] if !old.has_key?(name) || old[name] != value end old.each do |name,value| deletions << [name,value] unless new_hash.has_key?(name) end [changes,deletions] end def get_data_type(name, val) return types[:null] if val.nil? # Some types are just for validations like email. Only consider # it valid if includes in `types` if static_type = static_types[name.to_sym] return types[static_type] if types.keys.include?(static_type) end case val when String types[:string] when Fixnum types[:fixnum] when Float types[:float] when TrueClass, FalseClass types[:bool] else raise ArgumentError.new :val end end def convert(value, type) case type when types[:float] value.to_f when types[:fixnum] value.to_i when types[:bool] value == true || value == "t" || value == "true" when types[:null] nil else return value if types[type] # Otherwise it's a type error raise ArgumentError.new :type end end def validator_for(type_name) @validator_mapping ||= { 'email' => EmailSettingValidator, 'username' => UsernameSettingValidator, types[:fixnum] => IntegerSettingValidator, types[:string] => StringSettingValidator, 'list' => StringSettingValidator } @validator_mapping[type_name] end def setup_methods(name) clean_name = name.to_s.sub("?", "").to_sym define_singleton_method clean_name do c = @containers[provider.current_site] if c c[name] else refresh! current[name] end end define_singleton_method "#{clean_name}?" do self.send clean_name end define_singleton_method "#{clean_name}=" do |val| add_override!(name, val) end end def enum_class(name) enums[name] end def get_hostname(url) unless (URI.parse(url).scheme rescue nil).nil? url = "http://#{url}" if URI.parse(url).scheme.nil? url = URI.parse(url).host end url end end