discourse/app/models/theme_field.rb

299 lines
8.3 KiB
Ruby

require_dependency 'theme_settings_parser'
class ThemeField < ActiveRecord::Base
belongs_to :upload
has_one :javascript_cache, dependent: :destroy
scope :find_by_theme_ids, ->(theme_ids) {
return none unless theme_ids.present?
where(theme_id: theme_ids)
.joins(
"JOIN (
SELECT #{theme_ids.map.with_index { |id, idx| "#{id.to_i} AS theme_id, #{idx} AS sort_column" }.join(" UNION ALL SELECT ")}
) as X ON X.theme_id = theme_fields.theme_id")
.order("sort_column")
}
def self.types
@types ||= Enum.new(html: 0,
scss: 1,
theme_upload_var: 2,
theme_color_var: 3,
theme_var: 4,
yaml: 5)
end
def self.theme_var_type_ids
@theme_var_type_ids ||= [2, 3, 4]
end
validates :name, format: { with: /\A[a-z_][a-z0-9_-]*\z/i },
if: Proc.new { |field| ThemeField.theme_var_type_ids.include?(field.type_id) }
COMPILER_VERSION = 5
belongs_to :theme
def settings(source)
settings = {}
theme.cached_settings.each do |k, v|
if source.include?("settings.#{k}")
settings[k] = v
end
end
if settings.length > 0
"let settings = #{settings.to_json};"
else
""
end
end
def transpile(es6_source, version)
template = Tilt::ES6ModuleTranspilerTemplate.new {}
wrapped = <<PLUGIN_API_JS
if ('Discourse' in window) {
Discourse._registerPluginCode('#{version}', api => {
#{settings(es6_source)}
#{es6_source}
});
}
PLUGIN_API_JS
template.babel_transpile(wrapped)
end
def process_html(html)
errors = nil
javascript_cache || build_javascript_cache
javascript_cache.content = ''
doc = Nokogiri::HTML.fragment(html)
doc.css('script[type="text/x-handlebars"]').each do |node|
name = node["name"] || node["data-template-name"] || "broken"
is_raw = name =~ /\.raw$/
setting_helpers = ''
theme.cached_settings.each do |k, v|
val = v.is_a?(String) ? "\"#{v.gsub('"', "\\u0022")}\"" : v
setting_helpers += "{{theme-setting-injector #{is_raw ? "" : "context=this"} key=\"#{k}\" value=#{val}}}\n"
end
hbs_template = setting_helpers + node.inner_html
if is_raw
template = "requirejs('discourse-common/lib/raw-handlebars').template(#{Barber::Precompiler.compile(hbs_template)})"
javascript_cache.content << <<COMPILED
(function() {
if ('Discourse' in window) {
Discourse.RAW_TEMPLATES[#{name.sub(/\.raw$/, '').inspect}] = #{template};
}
})();
COMPILED
else
template = "Ember.HTMLBars.template(#{Barber::Ember::Precompiler.compile(hbs_template)})"
javascript_cache.content << <<COMPILED
(function() {
if ('Em' in window) {
Ember.TEMPLATES[#{name.inspect}] = #{template};
}
})();
COMPILED
end
node.remove
end
doc.css('script[type="text/discourse-plugin"]').each do |node|
if node['version'].present?
begin
javascript_cache.content << transpile(node.inner_html, node['version'])
rescue MiniRacer::RuntimeError => ex
javascript_cache.content << "console.error('Theme Transpilation Error:', #{ex.message.inspect});"
errors ||= []
errors << ex.message
end
node.remove
end
end
doc.css('script').each do |node|
next unless inline_javascript?(node)
javascript_cache.content << node.inner_html
javascript_cache.content << "\n"
node.remove
end
javascript_cache.save!
doc.add_child("<script src='#{javascript_cache.url}'></script>") if javascript_cache.content.present?
[doc.to_s, errors&.join("\n")]
end
def validate_yaml!
return unless self.name == "yaml"
errors = []
begin
ThemeSettingsParser.new(self).load do |name, default, type, opts|
setting = ThemeSetting.new(name: name, data_type: type, theme: theme)
translation_key = "themes.settings_errors"
if setting.invalid?
setting.errors.details.each_pair do |attribute, _errors|
_errors.each do |hash|
errors << I18n.t("#{translation_key}.#{attribute}_#{hash[:error]}", name: name)
end
end
end
if default.nil?
errors << I18n.t("#{translation_key}.default_value_missing", name: name)
end
if (min = opts[:min]) && (max = opts[:max])
unless ThemeSetting.value_in_range?(default, (min..max), type)
errors << I18n.t("#{translation_key}.default_out_range", name: name)
end
end
unless ThemeSetting.acceptable_value_for_type?(default, type)
errors << I18n.t("#{translation_key}.default_not_match_type", name: name)
end
end
rescue ThemeSettingsParser::InvalidYaml => e
errors << e.message
end
self.error = errors.join("\n").presence unless self.destroyed?
if will_save_change_to_error?
update_columns(error: self.error)
end
end
def self.guess_type(name)
if html_fields.include?(name.to_s)
types[:html]
elsif scss_fields.include?(name.to_s)
types[:scss]
elsif name.to_s === "yaml"
types[:yaml]
end
end
def self.html_fields
@html_fields ||= %w(body_tag head_tag header footer after_header)
end
def self.scss_fields
@scss_fields ||= %w(scss embedded_scss)
end
def ensure_baked!
if ThemeField.html_fields.include?(self.name)
if !self.value_baked || compiler_version != COMPILER_VERSION
self.value_baked, self.error = process_html(self.value)
self.compiler_version = COMPILER_VERSION
if self.will_save_change_to_value_baked? ||
self.will_save_change_to_compiler_version? ||
self.will_save_change_to_error?
self.update_columns(value_baked: value_baked,
compiler_version: compiler_version,
error: error)
end
end
end
end
def ensure_scss_compiles!
if ThemeField.scss_fields.include?(self.name)
begin
Stylesheet::Compiler.compile("@import \"theme_variables\"; @import \"theme_field\";",
"theme.scss",
theme_field: self.value.dup,
theme: self.theme
)
self.error = nil unless error.nil?
rescue SassC::SyntaxError => e
self.error = e.message unless self.destroyed?
end
if will_save_change_to_error?
update_columns(error: self.error)
end
end
end
def target_name
Theme.targets.invert[target_id].to_s
end
before_save do
if will_save_change_to_value? && !will_save_change_to_value_baked?
self.value_baked = nil
end
end
after_commit do
ensure_baked!
ensure_scss_compiles!
validate_yaml!
theme.clear_cached_settings!
Stylesheet::Manager.clear_theme_cache! if self.name.include?("scss")
CSP::Extension.clear_theme_extensions_cache! if name == 'yaml'
# TODO message for mobile vs desktop
MessageBus.publish "/header-change/#{theme.id}", self.value if theme && self.name == "header"
MessageBus.publish "/footer-change/#{theme.id}", self.value if theme && self.name == "footer"
end
private
JAVASCRIPT_TYPES = %w(
text/javascript
application/javascript
application/ecmascript
)
def inline_javascript?(node)
if node['src'].present?
false
elsif node['type'].present?
JAVASCRIPT_TYPES.include?(node['type'].downcase)
else
true
end
end
end
# == Schema Information
#
# Table name: theme_fields
#
# id :integer not null, primary key
# theme_id :integer not null
# target_id :integer not null
# name :string(30) not null
# value :text not null
# value_baked :text
# created_at :datetime not null
# updated_at :datetime not null
# compiler_version :integer default(0), not null
# error :string
# upload_id :integer
# type_id :integer default(0), not null
#
# Indexes
#
# theme_field_unique_index (theme_id,target_id,type_id,name) UNIQUE
#