mirror of
https://github.com/discourse/discourse.git
synced 2024-11-23 23:54:16 +08:00
804b8fd9f9
This is pre-request work to introduce a splash screen while site assets load. The only change this commit introduces is that it ensures we add the defer attribute to core/plugin/theme .JS files. This will allow us to insert markup before the browser starts evaluating those scripts later on. It has no visual or functional impact on core. This will not have any impact on how themes and plugins work. The only exception is themes loading external scripts in the </head> theme field directly via script tags. Everything will work the same but those would need to add the defer attribute if they want to keep the benefits introduced in this PR.
636 lines
21 KiB
Ruby
636 lines
21 KiB
Ruby
# frozen_string_literal: true
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class ThemeField < ActiveRecord::Base
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belongs_to :upload
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has_one :javascript_cache, dependent: :destroy
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has_one :upload_reference, as: :target, dependent: :destroy
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after_save do
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if self.type_id == ThemeField.types[:theme_upload_var] && saved_change_to_upload_id?
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UploadReference.ensure_exist!(upload_ids: [self.upload_id], target: self)
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end
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end
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scope :find_by_theme_ids, ->(theme_ids) {
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return none unless theme_ids.present?
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where(theme_id: theme_ids)
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.joins(
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"JOIN (
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SELECT #{theme_ids.map.with_index { |id, idx| "#{id.to_i} AS theme_id, #{idx} AS theme_sort_column" }.join(" UNION ALL SELECT ")}
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) as X ON X.theme_id = theme_fields.theme_id")
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.order("theme_sort_column")
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}
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scope :filter_locale_fields, ->(locale_codes) {
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return none unless locale_codes.present?
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where(target_id: Theme.targets[:translations], name: locale_codes)
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.joins(DB.sql_fragment(
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"JOIN (
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SELECT * FROM (VALUES #{locale_codes.map { "(?)" }.join(",")}) as Y (locale_code, locale_sort_column)
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) as Y ON Y.locale_code = theme_fields.name",
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*locale_codes.map.with_index { |code, index| [code, index] }
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))
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.order("Y.locale_sort_column")
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}
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scope :find_first_locale_fields, ->(theme_ids, locale_codes) {
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find_by_theme_ids(theme_ids)
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.filter_locale_fields(locale_codes)
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.reorder("X.theme_sort_column", "Y.locale_sort_column")
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.select("DISTINCT ON (X.theme_sort_column) *")
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}
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def self.types
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@types ||= Enum.new(html: 0,
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scss: 1,
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theme_upload_var: 2,
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theme_color_var: 3, # No longer used
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theme_var: 4, # No longer used
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yaml: 5,
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js: 6)
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end
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def self.theme_var_type_ids
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@theme_var_type_ids ||= [2]
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end
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def self.css_theme_type_ids
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@css_theme_type_ids ||= [0, 1]
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end
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def self.force_recompilation!
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find_each do |field|
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field.compiler_version = 0
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field.ensure_baked!
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end
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end
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validates :name, format: { with: /\A[a-z_][a-z0-9_-]*\z/i },
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if: Proc.new { |field| ThemeField.theme_var_type_ids.include?(field.type_id) }
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belongs_to :theme
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def process_html(html)
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errors = []
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javascript_cache || build_javascript_cache
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errors << I18n.t("themes.errors.optimized_link") if contains_optimized_link?(html)
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js_compiler = ThemeJavascriptCompiler.new(theme_id, self.theme.name)
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doc = Nokogiri::HTML5.fragment(html)
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doc.css('script[type="text/x-handlebars"]').each do |node|
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name = node["name"] || node["data-template-name"] || "broken"
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is_raw = name =~ /\.(raw|hbr)$/
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hbs_template = node.inner_html
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begin
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if is_raw
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js_compiler.append_raw_template(name, hbs_template)
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else
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js_compiler.append_ember_template(name, hbs_template)
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end
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rescue ThemeJavascriptCompiler::CompileError => ex
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errors << ex.message
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end
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node.remove
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end
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doc.css('script[type="text/discourse-plugin"]').each_with_index do |node, index|
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version = node['version']
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next if version.blank?
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initializer_name = "theme-field" +
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"-#{self.id}" +
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"-#{Theme.targets[self.target_id]}" +
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"-#{ThemeField.types[self.type_id]}" +
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"-script-#{index + 1}"
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begin
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js = <<~JS
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import { withPluginApi } from "discourse/lib/plugin-api";
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export default {
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name: #{initializer_name.inspect},
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after: "inject-objects",
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initialize() {
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withPluginApi(#{version.inspect}, (api) => {
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#{node.inner_html}
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});
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}
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};
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JS
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js_compiler.append_module(js, "discourse/initializers/#{initializer_name}", include_variables: true)
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rescue ThemeJavascriptCompiler::CompileError => ex
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errors << ex.message
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end
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node.remove
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end
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doc.css('script').each do |node|
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next unless inline_javascript?(node)
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js_compiler.append_raw_script(node.inner_html)
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node.remove
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end
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errors.each do |error|
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js_compiler.append_js_error(error)
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end
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settings_hash = theme.build_settings_hash
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js_compiler.prepend_settings(settings_hash) if js_compiler.content.present? && settings_hash.present?
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javascript_cache.content = js_compiler.content
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javascript_cache.save!
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doc.add_child("<script defer src='#{javascript_cache.url}' data-theme-id='#{theme_id}'></script>") if javascript_cache.content.present?
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[doc.to_s, errors&.join("\n")]
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end
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def process_extra_js(content)
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errors = []
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js_compiler = ThemeJavascriptCompiler.new(theme_id, theme.name)
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filename, extension = name.split(".", 2)
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filename = "test/#{filename}" if js_tests_field?
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begin
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case extension
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when "js.es6", "js"
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js_compiler.append_module(content, filename, include_variables: true)
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when "hbs"
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js_compiler.append_ember_template(filename.sub("discourse/templates/", ""), content)
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when "hbr", "raw.hbs"
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js_compiler.append_raw_template(filename.sub("discourse/templates/", ""), content)
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else
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raise ThemeJavascriptCompiler::CompileError.new(I18n.t("themes.compile_error.unrecognized_extension", extension: extension))
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end
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rescue ThemeJavascriptCompiler::CompileError => ex
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errors << ex.message
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end
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[js_compiler.content, errors&.join("\n")]
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end
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def validate_svg_sprite_xml
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upload = Upload.find(self.upload_id) rescue nil
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if Discourse.store.external?
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external_copy = Discourse.store.download(upload) rescue nil
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path = external_copy.try(:path)
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else
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path = Discourse.store.path_for(upload)
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end
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error = nil
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begin
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content = File.read(path)
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Nokogiri::XML(content) do |config|
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config.options = Nokogiri::XML::ParseOptions::NOBLANKS
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end
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rescue => e
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error = "Error with #{self.name}: #{e.inspect}"
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end
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error
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end
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def raw_translation_data(internal: false)
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# Might raise ThemeTranslationParser::InvalidYaml
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ThemeTranslationParser.new(self, internal: internal).load
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end
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def translation_data(with_overrides: true, internal: false, fallback_fields: nil)
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fallback_fields ||= theme.theme_fields.filter_locale_fields(I18n.fallbacks[name])
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fallback_data = fallback_fields.each_with_index.map do |field, index|
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begin
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field.raw_translation_data(internal: internal)
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rescue ThemeTranslationParser::InvalidYaml
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# If this is the locale with the error, raise it.
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# If not, let the other theme_field raise the error when it processes itself
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raise if field.id == id
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{}
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end
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end
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# TODO: Deduplicate the fallback data in the same way as JSLocaleHelper#load_translations_merged
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# this would reduce the size of the payload, without affecting functionality
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data = {}
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fallback_data.each { |hash| data.merge!(hash) }
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if with_overrides
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overrides = theme.translation_override_hash.deep_symbolize_keys
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data.deep_merge!(overrides)
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end
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data
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end
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def process_translation
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errors = []
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javascript_cache || build_javascript_cache
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js_compiler = ThemeJavascriptCompiler.new(theme_id, self.theme.name)
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begin
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data = translation_data
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js = <<~JS
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export default {
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name: "theme-#{theme_id}-translations",
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initialize() {
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/* Translation data for theme #{self.theme_id} (#{self.name})*/
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const data = #{data.to_json};
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for (let lang in data){
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let cursor = I18n.translations;
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for (let key of [lang, "js", "theme_translations"]){
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cursor = cursor[key] = cursor[key] || {};
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}
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cursor[#{self.theme_id}] = data[lang];
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}
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}
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};
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JS
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js_compiler.append_module(js, "discourse/pre-initializers/theme-#{theme_id}-translations", include_variables: false)
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rescue ThemeTranslationParser::InvalidYaml => e
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errors << e.message
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end
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javascript_cache.content = js_compiler.content
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javascript_cache.save!
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doc = ""
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doc = "<script defer src='#{javascript_cache.url}' data-theme-id='#{theme_id}'></script>" if javascript_cache.content.present?
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[doc, errors&.join("\n")]
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end
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def validate_yaml!
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return unless self.name == "yaml"
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errors = []
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begin
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ThemeSettingsParser.new(self).load do |name, default, type, opts|
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setting = ThemeSetting.new(name: name, data_type: type, theme: theme)
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translation_key = "themes.settings_errors"
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if setting.invalid?
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setting.errors.details.each_pair do |attribute, _errors|
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_errors.each do |hash|
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errors << I18n.t("#{translation_key}.#{attribute}_#{hash[:error]}", name: name)
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end
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end
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end
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if default.nil?
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errors << I18n.t("#{translation_key}.default_value_missing", name: name)
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end
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if (min = opts[:min]) && (max = opts[:max])
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unless ThemeSetting.value_in_range?(default, (min..max), type)
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errors << I18n.t("#{translation_key}.default_out_range", name: name)
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end
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end
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unless ThemeSetting.acceptable_value_for_type?(default, type)
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errors << I18n.t("#{translation_key}.default_not_match_type", name: name)
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end
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end
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rescue ThemeSettingsParser::InvalidYaml => e
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errors << e.message
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end
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self.error = errors.join("\n").presence
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end
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def self.guess_type(name:, target:)
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if basic_targets.include?(target.to_s) && html_fields.include?(name.to_s)
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types[:html]
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elsif basic_targets.include?(target.to_s) && scss_fields.include?(name.to_s)
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types[:scss]
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elsif target.to_s == "extra_scss"
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types[:scss]
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elsif target.to_s == "extra_js"
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types[:js]
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elsif target.to_s == "settings" || target.to_s == "translations"
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types[:yaml]
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end
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end
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def self.html_fields
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@html_fields ||= %w(body_tag head_tag header footer after_header)
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end
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def self.scss_fields
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@scss_fields ||= %w(scss embedded_scss color_definitions)
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end
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def self.basic_targets
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@basic_targets ||= %w(common desktop mobile)
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end
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def basic_html_field?
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ThemeField.basic_targets.include?(Theme.targets[self.target_id].to_s) &&
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ThemeField.html_fields.include?(self.name)
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end
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def extra_js_field?
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Theme.targets[self.target_id] == :extra_js
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end
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def js_tests_field?
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Theme.targets[self.target_id] == :tests_js
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end
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def basic_scss_field?
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ThemeField.basic_targets.include?(Theme.targets[self.target_id].to_s) &&
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ThemeField.scss_fields.include?(self.name)
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end
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def extra_scss_field?
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Theme.targets[self.target_id] == :extra_scss
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end
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def settings_field?
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Theme.targets[:settings] == self.target_id
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end
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def translation_field?
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Theme.targets[:translations] == self.target_id
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end
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def svg_sprite_field?
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ThemeField.theme_var_type_ids.include?(self.type_id) && self.name == SvgSprite.theme_sprite_variable_name
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end
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def ensure_baked!
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needs_baking = !self.value_baked || compiler_version != Theme.compiler_version
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return unless needs_baking
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if basic_html_field? || translation_field?
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self.value_baked, self.error = translation_field? ? process_translation : process_html(self.value)
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self.error = nil unless self.error.present?
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self.compiler_version = Theme.compiler_version
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DB.after_commit { CSP::Extension.clear_theme_extensions_cache! }
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elsif extra_js_field? || js_tests_field?
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self.value_baked, self.error = process_extra_js(self.value)
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self.error = nil unless self.error.present?
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self.compiler_version = Theme.compiler_version
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elsif basic_scss_field?
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ensure_scss_compiles!
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DB.after_commit { Stylesheet::Manager.clear_theme_cache! }
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elsif settings_field?
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validate_yaml!
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DB.after_commit { CSP::Extension.clear_theme_extensions_cache! }
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DB.after_commit { SvgSprite.expire_cache }
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self.value_baked = "baked"
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self.compiler_version = Theme.compiler_version
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elsif svg_sprite_field?
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DB.after_commit { SvgSprite.expire_cache }
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self.error = validate_svg_sprite_xml
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self.value_baked = "baked"
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self.compiler_version = Theme.compiler_version
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end
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if self.will_save_change_to_value_baked? ||
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self.will_save_change_to_compiler_version? ||
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self.will_save_change_to_error?
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self.update_columns(value_baked: value_baked,
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compiler_version: compiler_version,
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error: error)
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end
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end
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def compile_scss(prepended_scss = nil)
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prepended_scss ||= Stylesheet::Importer.new({}).prepended_scss
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self.theme.with_scss_load_paths do |load_paths|
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Stylesheet::Compiler.compile("#{prepended_scss} #{self.theme.scss_variables.to_s} #{self.value}",
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"#{Theme.targets[self.target_id]}.scss",
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theme: self.theme,
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load_paths: load_paths
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)
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end
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end
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def compiled_css(prepended_scss)
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css, _source_map = begin
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compile_scss(prepended_scss)
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rescue SassC::SyntaxError => e
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# We don't want to raise a blocking error here
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# admin theme editor or discourse_theme CLI will show it nonetheless
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Rails.logger.error "SCSS compilation error: #{e.message}"
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["", nil]
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end
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css
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end
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def ensure_scss_compiles!
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result = ["failed"]
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begin
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result = compile_scss
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if contains_optimized_link?(self.value)
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self.error = I18n.t("themes.errors.optimized_link")
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elsif contains_ember_css_selector?(self.value)
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self.error = I18n.t("themes.ember_selector_error")
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else
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self.error = nil unless error.nil?
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end
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rescue SassC::SyntaxError => e
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self.error = e.message unless self.destroyed?
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end
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self.compiler_version = Theme.compiler_version
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self.value_baked = Digest::SHA1.hexdigest(result.join(",")) # We don't use the compiled CSS here, we just use it to invalidate the stylesheet cache
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end
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def target_name
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Theme.targets[target_id].to_s
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end
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def contains_optimized_link?(text)
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OptimizedImage::URL_REGEX.match?(text)
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end
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def contains_ember_css_selector?(text)
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text.match(/#ember\d+|[.]ember-view/)
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end
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class ThemeFileMatcher
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OPTIONS = %i{name type target}
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# regex: used to match file names to fields (import).
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# can contain named capture groups for name/type/target
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# canonical: a lambda which converts name/type/target
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# to filename (export)
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# targets/names/types: can be nil if any value is allowed
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# single value
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# array of allowed values
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def initialize(regex:, canonical:, targets:, names:, types:)
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@allowed_values = {}
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@allowed_values[:names] = Array(names) if names
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@allowed_values[:targets] = Array(targets) if targets
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@allowed_values[:types] = Array(types) if types
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@canonical = canonical
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@regex = regex
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end
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def opts_from_filename(filename)
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match = @regex.match(filename)
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return false unless match
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hash = {}
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OPTIONS.each do |option|
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plural = :"#{option}s"
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hash[option] = @allowed_values[plural][0] if @allowed_values[plural]&.length == 1
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hash[option] = match[option] if hash[option].nil?
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end
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hash
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end
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def filename_from_opts(opts)
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is_match = OPTIONS.all? do |option|
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plural = :"#{option}s"
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next true if @allowed_values[plural] == nil # Allows any value
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next true if @allowed_values[plural].include?(opts[option]) # Value is allowed
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end
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is_match ? @canonical.call(opts) : nil
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end
|
|
end
|
|
|
|
FILE_MATCHERS = [
|
|
ThemeFileMatcher.new(regex: /^(?<target>(?:mobile|desktop|common))\/(?<name>(?:head_tag|header|after_header|body_tag|footer))\.html$/,
|
|
targets: [:mobile, :desktop, :common], names: ["head_tag", "header", "after_header", "body_tag", "footer"], types: :html,
|
|
canonical: -> (h) { "#{h[:target]}/#{h[:name]}.html" }),
|
|
ThemeFileMatcher.new(regex: /^(?<target>(?:mobile|desktop|common))\/(?:\k<target>)\.scss$/,
|
|
targets: [:mobile, :desktop, :common], names: "scss", types: :scss,
|
|
canonical: -> (h) { "#{h[:target]}/#{h[:target]}.scss" }),
|
|
ThemeFileMatcher.new(regex: /^common\/embedded\.scss$/,
|
|
targets: :common, names: "embedded_scss", types: :scss,
|
|
canonical: -> (h) { "common/embedded.scss" }),
|
|
ThemeFileMatcher.new(regex: /^common\/color_definitions\.scss$/,
|
|
targets: :common, names: "color_definitions", types: :scss,
|
|
canonical: -> (h) { "common/color_definitions.scss" }),
|
|
ThemeFileMatcher.new(regex: /^(?:scss|stylesheets)\/(?<name>.+)\.scss$/,
|
|
targets: :extra_scss, names: nil, types: :scss,
|
|
canonical: -> (h) { "stylesheets/#{h[:name]}.scss" }),
|
|
ThemeFileMatcher.new(regex: /^javascripts\/(?<name>.+)$/,
|
|
targets: :extra_js, names: nil, types: :js,
|
|
canonical: -> (h) { "javascripts/#{h[:name]}" }),
|
|
ThemeFileMatcher.new(regex: /^test\/(?<name>.+)$/,
|
|
targets: :tests_js, names: nil, types: :js,
|
|
canonical: -> (h) { "test/#{h[:name]}" }),
|
|
ThemeFileMatcher.new(regex: /^settings\.ya?ml$/,
|
|
names: "yaml", types: :yaml, targets: :settings,
|
|
canonical: -> (h) { "settings.yml" }),
|
|
ThemeFileMatcher.new(regex: /^locales\/(?<name>(?:#{I18n.available_locales.join("|")}))\.yml$/,
|
|
names: I18n.available_locales.map(&:to_s), types: :yaml, targets: :translations,
|
|
canonical: -> (h) { "locales/#{h[:name]}.yml" }),
|
|
ThemeFileMatcher.new(regex: /(?!)/, # Never match uploads by filename, they must be named in about.json
|
|
names: nil, types: :theme_upload_var, targets: :common,
|
|
canonical: -> (h) { "assets/#{h[:name]}#{File.extname(h[:filename])}" }),
|
|
]
|
|
|
|
# For now just work for standard fields
|
|
def file_path
|
|
FILE_MATCHERS.each do |matcher|
|
|
if filename = matcher.filename_from_opts(target: target_name.to_sym,
|
|
name: name,
|
|
type: ThemeField.types[type_id],
|
|
filename: upload&.original_filename)
|
|
return filename
|
|
end
|
|
end
|
|
nil # Not a file (e.g. a theme variable/color)
|
|
end
|
|
|
|
def self.opts_from_file_path(filename)
|
|
FILE_MATCHERS.each do |matcher|
|
|
if opts = matcher.opts_from_filename(filename)
|
|
return opts
|
|
end
|
|
end
|
|
nil
|
|
end
|
|
|
|
def dependent_fields
|
|
if extra_scss_field?
|
|
return theme.theme_fields.where(target_id: ThemeField.basic_targets.map { |t| Theme.targets[t.to_sym] },
|
|
name: ThemeField.scss_fields)
|
|
elsif settings_field?
|
|
return theme.theme_fields.where(target_id: ThemeField.basic_targets.map { |t| Theme.targets[t.to_sym] },
|
|
name: ThemeField.scss_fields + ThemeField.html_fields)
|
|
end
|
|
ThemeField.none
|
|
end
|
|
|
|
def invalidate_baked!
|
|
update_column(:value_baked, nil)
|
|
dependent_fields.update_all(value_baked: nil)
|
|
end
|
|
|
|
before_save do
|
|
if (will_save_change_to_value? || will_save_change_to_upload_id?) && !will_save_change_to_value_baked?
|
|
self.value_baked = nil
|
|
end
|
|
if upload && upload.extension == "js"
|
|
if will_save_change_to_upload_id? || !javascript_cache
|
|
javascript_cache ||= build_javascript_cache
|
|
javascript_cache.content = upload.content
|
|
end
|
|
end
|
|
end
|
|
|
|
after_save do
|
|
dependent_fields.each(&:invalidate_baked!)
|
|
end
|
|
|
|
after_destroy do
|
|
if svg_sprite_field?
|
|
DB.after_commit { SvgSprite.expire_cache }
|
|
end
|
|
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(255) not null
|
|
# value :text not null
|
|
# value_baked :text
|
|
# created_at :datetime not null
|
|
# updated_at :datetime not null
|
|
# compiler_version :string(50) 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
|
|
#
|