discourse/lib/stylesheet/importer.rb

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# frozen_string_literal: true
require_dependency 'stylesheet/common'
require_dependency 'global_path'
module Stylesheet
class Importer < SassC::Importer
include GlobalPath
THEME_TARGETS ||= %w{embedded_theme mobile_theme desktop_theme}
def self.special_imports
@special_imports ||= {}
end
def self.register_import(name, &blk)
special_imports[name] = blk
end
# Contained in function so that it can be called repeatedly from test mode
def self.register_imports!
@special_imports = {}
register_import "theme_field" do
Import.new("#{theme_dir(@theme_id)}/theme_field.scss", source: @theme_field)
end
Discourse.plugins.each do |plugin|
plugin_directory_name = plugin.directory_name
["", "mobile", "desktop"].each do |type|
asset_name = type.present? ? "#{plugin_directory_name}_#{type}" : plugin_directory_name
stylesheets = type.present? ? DiscoursePluginRegistry.send("#{type}_stylesheets") : DiscoursePluginRegistry.stylesheets
if stylesheets[plugin_directory_name].present?
register_import asset_name do
import_files(stylesheets[plugin_directory_name])
end
end
end
end
register_import "plugins_variables" do
import_files(DiscoursePluginRegistry.sass_variables)
end
register_import "theme_colors" do
contents = +""
if @color_scheme_id
colors = begin
ColorScheme.find(@color_scheme_id).resolved_colors
rescue
ColorScheme.base_colors
end
else
colors = (@theme_id && theme.color_scheme) ? theme.color_scheme.resolved_colors : ColorScheme.base_colors
end
colors.each do |n, hex|
contents << "$#{n}: ##{hex} !default;\n"
end
Import.new("theme_colors.scss", source: contents)
end
register_import "theme_variables" do
contents = +""
theme&.all_theme_variables&.each do |field|
if field.type_id == ThemeField.types[:theme_upload_var]
if upload = field.upload
url = upload_cdn_path(upload.url)
contents << "$#{field.name}: unquote(\"#{url}\");\n"
end
else
contents << to_scss_variable(field.name, field.value)
end
end
theme&.included_settings&.each do |name, value|
next if name == "theme_uploads"
contents << to_scss_variable(name, value)
end
Import.new("theme_variable.scss", source: contents)
end
register_import "category_backgrounds" do
contents = +""
Category.where('uploaded_background_id IS NOT NULL').each do |c|
contents << category_css(c) if c.uploaded_background&.url.present?
end
Import.new("category_background.scss", source: contents)
end
register_import "embedded_theme" do
next unless @theme_id
theme_import(:common, :embedded_scss)
end
register_import "mobile_theme" do
next unless @theme_id
theme_import(:mobile, :scss)
end
register_import "desktop_theme" do
next unless @theme_id
theme_import(:desktop, :scss)
end
end
register_imports!
def initialize(options)
@theme = options[:theme]
@theme_id = options[:theme_id]
@theme_field = options[:theme_field]
@color_scheme_id = options[:color_scheme_id]
if @theme && !@theme_id
# make up an id so other stuff does not bail out
@theme_id = @theme.id || -1
end
@importable_theme_fields = {}
end
def import_files(files)
files.map do |file|
# we never want inline css imports, they are a mess
# this tricks libsass so it imports inline instead
if file =~ /\.css$/
file = file[0..-5]
end
Import.new(file)
end
end
def theme_import(target, attr)
fields = theme.list_baked_fields(target, attr)
fields.map do |field|
value = field.value
if value.present?
filename = "theme_#{field.theme.id}/#{field.target_name}-#{field.name}-#{field.theme.name.parameterize}.scss"
with_comment = <<~COMMENT
// Theme: #{field.theme.name}
// Target: #{field.target_name} #{field.name}
// Last Edited: #{field.updated_at}
#{value}
COMMENT
Import.new(filename, source: with_comment)
end
end.compact
end
def theme
unless @theme
@theme = (@theme_id && Theme.find(@theme_id)) || :nil
end
@theme == :nil ? nil : @theme
end
def theme_dir(import_theme_id)
"theme_#{import_theme_id}"
end
def extract_theme_id(path)
path[/^theme_([0-9]+)\//, 1]
end
def importable_theme_fields(import_theme_id)
return {} unless theme && import_theme = Theme.find(import_theme_id)
@importable_theme_fields[import_theme_id] ||= begin
hash = {}
import_theme.theme_fields.where(target_id: Theme.targets[:extra_scss]).each do |field|
hash[field.name] = field.value
end
hash
end
end
def match_theme_import(path, parent_path)
# Only allow importing theme stylesheets from within stylesheets in the same theme
return false unless theme && import_theme_id = extract_theme_id(parent_path) # Could be a child theme
parent_dir, _ = File.split(parent_path)
# Could be relative to the importing file, or relative to the root of the theme directory
search_paths = [parent_dir, theme_dir(import_theme_id)].uniq
search_paths.each do |search_path|
resolved = Pathname.new("#{search_path}/#{path}").cleanpath.to_s # Remove unnecessary ./ and ../
next unless resolved.start_with?("#{theme_dir(import_theme_id)}/")
resolved_within_theme = resolved.sub(/^theme_[0-9]+\//, "")
if importable_theme_fields(import_theme_id).keys.include?(resolved_within_theme)
return resolved, importable_theme_fields(import_theme_id)[resolved_within_theme]
end
end
false
end
def category_css(category)
"body.category-#{category.slug}, body.category-#{category.full_slug} { background-image: url(#{upload_cdn_path(category.uploaded_background.url)}) }\n"
end
def to_scss_variable(name, value)
escaped = SassC::Script::Value::String.quote(value, sass: true)
"$#{name}: unquote(#{escaped});\n"
end
def imports(asset, parent_path)
if asset[-1] == "*"
Dir["#{Stylesheet::Common::ASSET_ROOT}/#{asset}.scss"].map do |path|
Import.new(asset[0..-2] + File.basename(path, ".*"))
end
elsif callback = Importer.special_imports[asset]
instance_eval(&callback)
else
path, source = match_theme_import(asset, parent_path)
if path && source
Import.new(path, source: source)
else
Import.new(asset + ".scss")
end
end
end
end
end