mirror of
https://github.com/discourse/discourse.git
synced 2024-12-12 21:24:07 +08:00
aaec964547
### Background Several call sites use `FileStore#download` (through `Discourse.store.download`). In some cases the author seems aware that the method can raise an error if the download fails, and in some cases not. Because of this we're seeing some of these exceptions bubble all the way up and getting logged in production. Although they are not really actionable at that point. Rather each call site needs to be considered to figure out how to handle them. ### What is this change? This change accomplishes primarily two things. Firstly it separates the method into a safe version which will handle errors by returning `nil`, and an unsafe version which will re-package upstream errors in a new `FileStore::DownloadError` class. Secondly it updates the call sites which have been doing error handling downstream to use the new safe version. For backwards compatibility, there's an interim situation and a desired end state. **Interim:** ``` FileStore#download → Old unsafe version. Will raise any error and show a deprecation warning. FileStore#download! → New unsafe version. Will raise FileStore::DownloadError. FileStore#download_safe → New safe version. Will return nil. ``` **Desired end-state:** ``` FileStore#download → New safe version. Will return nil. FileStore#download! → New unsafe version. Will raise FileStore::DownloadError. ``` ### What's next? We need to do a quick audit of the call sites that are using the old unsafe version without any error handling, as well as check for call sites in plugins other repos. Follow-up PRs incoming.
694 lines
21 KiB
Ruby
694 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,
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->(theme_ids) {
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return none unless theme_ids.present?
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where(theme_id: theme_ids).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,
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->(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).joins(
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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,
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->(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 ||=
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Enum.new(
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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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)
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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,
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format: {
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with: /\A[a-z_][a-z0-9_-]*\z/i,
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},
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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
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.css('script[type="text/x-handlebars"]')
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.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("discourse/templates/#{name}", hbs_template)
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end
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rescue ThemeJavascriptCompiler::CompileError => ex
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js_compiler.append_js_error("discourse/templates/#{name}", ex.message)
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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
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.css('script[type="text/discourse-plugin"]')
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.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 =
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"theme-field" + "-#{self.id}" + "-#{Theme.targets[self.target_id]}" +
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"-#{ThemeField.types[self.type_id]}" + "-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(
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js,
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"discourse/initializers/#{initializer_name}",
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include_variables: true,
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)
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rescue ThemeJavascriptCompiler::CompileError => ex
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js_compiler.append_js_error("discourse/initializers/#{initializer_name}", ex.message)
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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
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.css("script")
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.each_with_index do |node, index|
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next unless inline_javascript?(node)
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js_compiler.append_raw_script(
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"_html/#{Theme.targets[self.target_id]}/#{name}_#{index + 1}.js",
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node.inner_html,
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)
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node.remove
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end
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settings_hash = theme.build_settings_hash
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if js_compiler.has_content? && settings_hash.present?
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js_compiler.prepend_settings(settings_hash)
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end
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javascript_cache.content = js_compiler.content
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javascript_cache.source_map = js_compiler.source_map
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javascript_cache.save!
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doc.add_child(<<~HTML.html_safe) if javascript_cache.content.present?
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<link rel="preload" href="#{javascript_cache.url}" as="script">
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<script defer src='#{javascript_cache.url}' data-theme-id='#{theme_id}'></script>
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HTML
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[doc.to_s, errors&.join("\n")]
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end
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def validate_svg_sprite_xml
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upload =
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begin
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Upload.find(self.upload_id)
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rescue StandardError
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nil
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end
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if Discourse.store.external?
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external_copy = Discourse.store.download_safe(upload)
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path = external_copy&.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) { |config| config.options = Nokogiri::XML::ParseOptions::NOBLANKS }
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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 =
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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(
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js,
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"discourse/pre-initializers/theme-#{theme_id}-translations",
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include_variables: false,
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)
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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.source_map = js_compiler.source_map
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javascript_cache.save!
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doc = ""
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doc = <<~HTML.html_safe if javascript_cache.content.present?
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<link rel="preload" href="#{javascript_cache.url}" as="script">
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<script defer src='#{javascript_cache.url}' data-theme-id='#{theme_id}'></script>
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HTML
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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
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.new(self)
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.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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errors << I18n.t("#{translation_key}.default_value_missing", name: name) if default.nil?
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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) &&
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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 =
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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.error = nil
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self.value_baked = "baked"
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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? || self.will_save_change_to_compiler_version? ||
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self.will_save_change_to_error?
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self.update_columns(
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value_baked: value_baked,
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compiler_version: compiler_version,
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error: error,
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)
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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(
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"#{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 =
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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|
|
|
plural = :"#{option}s"
|
|
hash[option] = @allowed_values[plural][0] if @allowed_values[plural]&.length == 1
|
|
hash[option] = match[option] if hash[option].nil?
|
|
end
|
|
hash
|
|
end
|
|
|
|
def filename_from_opts(opts)
|
|
is_match =
|
|
OPTIONS.all? do |option|
|
|
plural = :"#{option}s"
|
|
next true if @allowed_values[plural] == nil # Allows any value
|
|
next true if @allowed_values[plural].include?(opts[option]) # Value is allowed
|
|
end
|
|
is_match ? @canonical.call(opts) : nil
|
|
end
|
|
end
|
|
|
|
FILE_MATCHERS = [
|
|
ThemeFileMatcher.new(
|
|
regex:
|
|
%r{^(?<target>(?:mobile|desktop|common))/(?<name>(?:head_tag|header|after_header|body_tag|footer))\.html$},
|
|
targets: %i[mobile desktop common],
|
|
names: %w[head_tag header after_header body_tag footer],
|
|
types: :html,
|
|
canonical: ->(h) { "#{h[:target]}/#{h[:name]}.html" },
|
|
),
|
|
ThemeFileMatcher.new(
|
|
regex: %r{^(?<target>(?:mobile|desktop|common))/(?:\k<target>)\.scss$},
|
|
targets: %i[mobile desktop common],
|
|
names: "scss",
|
|
types: :scss,
|
|
canonical: ->(h) { "#{h[:target]}/#{h[:target]}.scss" },
|
|
),
|
|
ThemeFileMatcher.new(
|
|
regex: %r{^common/embedded\.scss$},
|
|
targets: :common,
|
|
names: "embedded_scss",
|
|
types: :scss,
|
|
canonical: ->(h) { "common/embedded.scss" },
|
|
),
|
|
ThemeFileMatcher.new(
|
|
regex: %r{^common/color_definitions\.scss$},
|
|
targets: :common,
|
|
names: "color_definitions",
|
|
types: :scss,
|
|
canonical: ->(h) { "common/color_definitions.scss" },
|
|
),
|
|
ThemeFileMatcher.new(
|
|
regex: %r{^(?:scss|stylesheets)/(?<name>.+)\.scss$},
|
|
targets: :extra_scss,
|
|
names: nil,
|
|
types: :scss,
|
|
canonical: ->(h) { "stylesheets/#{h[:name]}.scss" },
|
|
),
|
|
ThemeFileMatcher.new(
|
|
regex: %r{^javascripts/(?<name>.+)$},
|
|
targets: :extra_js,
|
|
names: nil,
|
|
types: :js,
|
|
canonical: ->(h) { "javascripts/#{h[:name]}" },
|
|
),
|
|
ThemeFileMatcher.new(
|
|
regex: %r{^test/(?<name>.+)$},
|
|
targets: :tests_js,
|
|
names: nil,
|
|
types: :js,
|
|
canonical: ->(h) { "test/#{h[:name]}" },
|
|
),
|
|
ThemeFileMatcher.new(
|
|
regex: /^settings\.ya?ml$/,
|
|
names: "yaml",
|
|
types: :yaml,
|
|
targets: :settings,
|
|
canonical: ->(h) { "settings.yml" },
|
|
),
|
|
ThemeFileMatcher.new(
|
|
regex: %r{^locales/(?<name>(?:#{I18n.available_locales.join("|")}))\.yml$},
|
|
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 { dependent_fields.each(&:invalidate_baked!) }
|
|
|
|
after_destroy { DB.after_commit { SvgSprite.expire_cache } if svg_sprite_field? }
|
|
|
|
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
|
|
#
|