discourse/app/models/theme_modifier_set.rb

91 lines
2.4 KiB
Ruby

# frozen_string_literal: true
class ThemeModifierSet < ActiveRecord::Base
class ThemeModifierSetError < StandardError; end
belongs_to :theme
def self.modifiers
@modifiers ||= self.load_modifiers
end
validate :type_validator
def type_validator
ThemeModifierSet.modifiers.each do |k, config|
value = public_send(k)
next if value.nil?
case config[:type]
when :boolean
next if [true, false].include?(value)
when :string_array
next if value.is_a?(Array) && value.all? { |v| v.is_a?(String) }
end
errors.add(k, :invalid)
end
end
after_save do
if saved_change_to_svg_icons?
SvgSprite.expire_cache
end
if saved_change_to_csp_extensions?
CSP::Extension.clear_theme_extensions_cache!
end
end
# Given the ids of multiple active themes / theme components, this function
# will combine them into a 'resolved' behavior
def self.resolve_modifier_for_themes(theme_ids, modifier_name)
return nil if !(config = self.modifiers[modifier_name])
all_values = self.where(theme_id: theme_ids).where.not(modifier_name => nil).pluck(modifier_name)
case config[:type]
when :boolean
all_values.any?
when :string_array
all_values.flatten(1)
else
raise ThemeModifierSetError "Invalid theme modifier combine_mode"
end
end
private
# Build the list of modifiers from the DB schema.
# This allows plugins to introduce new modifiers by adding columns to the table
def self.load_modifiers
hash = {}
columns_hash.each do |column_name, info|
next if ["id", "theme_id"].include?(column_name)
type = nil
if info.type == :string && info.array?
type = :string_array
elsif info.type == :boolean && !info.array?
type = :boolean
else
raise ThemeModifierSetError "Invalid theme modifier column type" if ![:boolean, :string].include?(info.type)
end
hash[column_name.to_sym] = { type: type }
end
hash
end
end
# == Schema Information
#
# Table name: theme_modifier_sets
#
# id :bigint not null, primary key
# theme_id :bigint not null
# serialize_topic_excerpts :boolean
# csp_extensions :string is an Array
# svg_icons :string is an Array
#
# Indexes
#
# index_theme_modifier_sets_on_theme_id (theme_id) UNIQUE
#