require_dependency 'sass/discourse_stylesheets' require_dependency 'distributed_cache' class ColorScheme < ActiveRecord::Base def self.hex_cache @hex_cache ||= DistributedCache.new("scheme_hex_for_name") end attr_accessor :is_base has_many :color_scheme_colors, -> { order('id ASC') }, dependent: :destroy alias_method :colors, :color_scheme_colors scope :current_version, ->{ where(versioned_id: nil) } after_destroy :destroy_versions after_save :publish_discourse_stylesheet after_save :dump_hex_cache after_destroy :dump_hex_cache validates_associated :color_scheme_colors BASE_COLORS_FILE = "#{Rails.root}/app/assets/stylesheets/common/foundation/colors.scss" @mutex = Mutex.new def self.base_colors @mutex.synchronize do return @base_colors if @base_colors @base_colors = {} read_colors_file.each do |line| matches = /\$([\w]+):\s*#([0-9a-fA-F]{3}|[0-9a-fA-F]{6})(?:[;]|\s)/.match(line.strip) @base_colors[matches[1]] = matches[2] if matches end end @base_colors end def self.read_colors_file File.readlines(BASE_COLORS_FILE) end def self.enabled current_version.find_by(enabled: true) end def self.base return @base_color_scheme if @base_color_scheme @base_color_scheme = new(name: I18n.t('color_schemes.base_theme_name'), enabled: false) @base_color_scheme.colors = base_colors.map { |name, hex| {name: name, hex: hex} } @base_color_scheme.is_base = true @base_color_scheme end # create_from_base will create a new ColorScheme that overrides Discourse's base color scheme with the given colors. def self.create_from_base(params) new_color_scheme = new(name: params[:name]) colors = base.colors_hashes # Override base values params[:colors].each do |name, hex| c = colors.find {|x| x[:name].to_s == name.to_s} c[:hex] = hex end new_color_scheme.colors = colors new_color_scheme.save new_color_scheme end def self.hex_for_name(name) val = begin hex_cache[name] ||= begin # Can't use `where` here because base doesn't allow it (enabled || base).colors.find {|c| c.name == name }.try(:hex) || :nil end end val == :nil ? nil : val end def colors=(arr) @colors_by_name = nil arr.each do |c| self.color_scheme_colors << ColorSchemeColor.new( name: c[:name], hex: c[:hex] ) end end def colors_by_name @colors_by_name ||= self.colors.inject({}) { |sum,c| sum[c.name] = c; sum; } end def clear_colors_cache @colors_by_name = nil end def colors_hashes color_scheme_colors.map do |c| {name: c.name, hex: c.hex} end end def previous_version ColorScheme.where(versioned_id: self.id).where('version < ?', self.version).order('version DESC').first end def destroy_versions ColorScheme.where(versioned_id: self.id).destroy_all end def publish_discourse_stylesheet MessageBus.publish("/discourse_stylesheet", self.name) DiscourseStylesheets.cache.clear end def dump_hex_cache self.class.hex_cache.clear end end # == Schema Information # # Table name: color_schemes # # id :integer not null, primary key # name :string not null # enabled :boolean default(FALSE), not null # versioned_id :integer # version :integer default(1), not null # created_at :datetime not null # updated_at :datetime not null #