discourse/lib/plugin/instance.rb

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# frozen_string_literal: true
require 'digest/sha1'
require 'fileutils'
require_dependency 'plugin/metadata'
require_dependency 'auth'
class Plugin::CustomEmoji
CACHE_KEY ||= "plugin-emoji"
def self.cache_key
@@cache_key ||= CACHE_KEY
end
def self.emojis
@@emojis ||= {}
end
def self.clear_cache
@@cache_key = CACHE_KEY
@@emojis = {}
@@translations = {}
end
def self.register(name, url, group = Emoji::DEFAULT_GROUP)
@@cache_key = Digest::SHA1.hexdigest(cache_key + name + group)[0..10]
new_group = emojis[group] || {}
new_group[name] = url
emojis[group] = new_group
end
def self.unregister(name, group = Emoji::DEFAULT_GROUP)
emojis[group].delete(name)
end
def self.translations
@@translations ||= {}
end
def self.translate(from, to)
@@cache_key = Digest::SHA1.hexdigest(cache_key + from)[0..10]
translations[from] = to
end
end
class Plugin::Instance
attr_accessor :path, :metadata
attr_reader :admin_route
# Memoized array readers
[:assets,
:color_schemes,
:before_auth_initializers,
:initializers,
:javascripts,
:locales,
:service_workers,
:styles,
:themes,
:csp_extensions,
:asset_filters
].each do |att|
class_eval %Q{
def #{att}
@#{att} ||= []
end
}
end
# If plugins provide `transpile_js: true` in their metadata we will
# transpile regular JS files in the assets folders. Going forward,
# all plugins should do this.
def transpile_js
metadata.try(:transpile_js) == "true"
end
def seed_data
@seed_data ||= HashWithIndifferentAccess.new({})
end
def self.find_all(parent_path)
[].tap { |plugins|
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# also follows symlinks - http://stackoverflow.com/q/357754
Dir["#{parent_path}/*/plugin.rb"].sort.each do |path|
# tagging is included in core, so don't load it
next if path =~ /discourse-tagging/
source = File.read(path)
metadata = Plugin::Metadata.parse(source)
plugins << self.new(metadata, path)
end
}
end
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def initialize(metadata = nil, path = nil)
@metadata = metadata
@path = path
@idx = 0
end
def register_anonymous_cache_key(key, &block)
key_method = "key_#{key}"
add_to_class(Middleware::AnonymousCache::Helper, key_method, &block)
Middleware::AnonymousCache.cache_key_segments[key] = key_method
Middleware::AnonymousCache.compile_key_builder
end
def add_admin_route(label, location)
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@admin_route = { label: label, location: location }
end
def enabled?
@enabled_site_setting ? SiteSetting.get(@enabled_site_setting) : true
end
delegate :name, to: :metadata
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def add_to_serializer(serializer, attr, define_include_method = true, &block)
reloadable_patch do |plugin|
base = "#{serializer.to_s.classify}Serializer".constantize rescue "#{serializer.to_s}Serializer".constantize
# we have to work through descendants cause serializers may already be baked and cached
([base] + base.descendants).each do |klass|
unless attr.to_s.start_with?("include_")
klass.attributes(attr)
if define_include_method
# Don't include serialized methods if the plugin is disabled
klass.public_send(:define_method, "include_#{attr}?") { plugin.enabled? }
end
end
klass.public_send(:define_method, attr, &block)
end
end
end
# Applies to all sites in a multisite environment. Ignores plugin.enabled?
def add_report(name, &block)
reloadable_patch do |plugin|
Report.add_report(name, &block)
end
end
# Applies to all sites in a multisite environment. Ignores plugin.enabled?
def replace_flags(settings: ::FlagSettings.new)
next_flag_id = ReviewableScore.types.values.max + 1
yield(settings, next_flag_id)
reloadable_patch do |plugin|
::PostActionType.replace_flag_settings(settings)
::ReviewableScore.reload_types
end
end
def whitelist_staff_user_custom_field(field)
DiscoursePluginRegistry.register_staff_user_custom_field(field, self)
end
def whitelist_public_user_custom_field(field)
DiscoursePluginRegistry.register_public_user_custom_field(field, self)
end
def register_editable_user_custom_field(field, staff_only: false)
if staff_only
DiscoursePluginRegistry.register_staff_editable_user_custom_field(field, self)
else
DiscoursePluginRegistry.register_self_editable_user_custom_field(field, self)
end
end
def register_editable_group_custom_field(field)
DiscoursePluginRegistry.register_editable_group_custom_field(field, self)
end
# Request a new size for topic thumbnails
# Will respect plugin enabled setting is enabled
# Size should be an array with two elements [max_width, max_height]
def register_topic_thumbnail_size(size)
if !(size.kind_of?(Array) && size.length == 2)
raise ArgumentError.new("Topic thumbnail dimension is not valid")
end
DiscoursePluginRegistry.register_topic_thumbnail_size(size, self)
end
def custom_avatar_column(column)
reloadable_patch do |plugin|
AvatarLookup.lookup_columns << column
AvatarLookup.lookup_columns.uniq!
end
end
# Applies to all sites in a multisite environment. Ignores plugin.enabled?
def add_body_class(class_name)
reloadable_patch do |plugin|
::ApplicationHelper.extra_body_classes << class_name
end
end
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def rescue_from(exception, &block)
reloadable_patch do |plugin|
::ApplicationController.rescue_from(exception, &block)
end
end
# Extend a class but check that the plugin is enabled
# for class methods use `add_class_method`
def add_to_class(class_name, attr, &block)
reloadable_patch do |plugin|
klass = class_name.to_s.classify.constantize rescue class_name.to_s.constantize
hidden_method_name = :"#{attr}_without_enable_check"
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klass.public_send(:define_method, hidden_method_name, &block)
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klass.public_send(:define_method, attr) do |*args|
public_send(hidden_method_name, *args) if plugin.enabled?
end
end
end
# Adds a class method to a class, respecting if plugin is enabled
def add_class_method(klass_name, attr, &block)
reloadable_patch do |plugin|
klass = klass_name.to_s.classify.constantize rescue klass_name.to_s.constantize
hidden_method_name = :"#{attr}_without_enable_check"
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klass.public_send(:define_singleton_method, hidden_method_name, &block)
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klass.public_send(:define_singleton_method, attr) do |*args|
public_send(hidden_method_name, *args) if plugin.enabled?
end
end
end
def add_model_callback(klass_name, callback, options = {}, &block)
reloadable_patch do |plugin|
klass = klass_name.to_s.classify.constantize rescue klass_name.to_s.constantize
# generate a unique method name
method_name = "#{plugin.name}_#{klass.name}_#{callback}#{@idx}".underscore
@idx += 1
hidden_method_name = :"#{method_name}_without_enable_check"
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klass.public_send(:define_method, hidden_method_name, &block)
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klass.public_send(callback, options) do |*args|
public_send(hidden_method_name, *args) if plugin.enabled?
end
hidden_method_name
end
end
# Add a post_custom_fields_whitelister block to the TopicView, respecting if the plugin is enabled
def topic_view_post_custom_fields_whitelister(&block)
reloadable_patch do |plugin|
::TopicView.add_post_custom_fields_whitelister do |user|
plugin.enabled? ? block.call(user) : []
end
end
end
# Applies to all sites in a multisite environment. Ignores plugin.enabled?
def add_preloaded_group_custom_field(field)
reloadable_patch do |plugin|
::Group.preloaded_custom_field_names << field
end
end
# Applies to all sites in a multisite environment. Ignores plugin.enabled?
def add_preloaded_topic_list_custom_field(field)
reloadable_patch do |plugin|
::TopicList.preloaded_custom_fields << field
end
end
# Add a permitted_create_param to Post, respecting if the plugin is enabled
def add_permitted_post_create_param(name, type = :string)
reloadable_patch do |plugin|
::Post.plugin_permitted_create_params[name] = { plugin: plugin, type: type }
end
end
# Add validation method but check that the plugin is enabled
def validate(klass, name, &block)
klass = klass.to_s.classify.constantize
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klass.public_send(:define_method, name, &block)
plugin = self
klass.validate(name, if: -> { plugin.enabled? })
end
# will make sure all the assets this plugin needs are registered
def generate_automatic_assets!
paths = []
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assets = []
automatic_assets.each do |path, contents|
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write_asset(path, contents)
paths << path
assets << [path, nil, directory_name]
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end
delete_extra_automatic_assets(paths)
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assets
end
def delete_extra_automatic_assets(good_paths)
return unless Dir.exists? auto_generated_path
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filenames = good_paths.map { |f| File.basename(f) }
# nuke old files
Dir.foreach(auto_generated_path) do |p|
next if [".", ".."].include?(p)
next if filenames.include?(p)
File.delete(auto_generated_path + "/#{p}")
end
end
def ensure_directory(path)
dirname = File.dirname(path)
unless File.directory?(dirname)
FileUtils.mkdir_p(dirname)
end
end
def directory
File.dirname(path)
end
def auto_generated_path
File.dirname(path) << "/auto_generated"
end
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def after_initialize(&block)
initializers << block
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end
def before_auth(&block)
raise "Auth providers must be registered before omniauth middleware. after_initialize is too late!" if @before_auth_complete
before_auth_initializers << block
end
# A proxy to `DiscourseEvent.on` which does nothing if the plugin is disabled
def on(event_name, &block)
DiscourseEvent.on(event_name) do |*args|
block.call(*args) if enabled?
end
end
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def notify_after_initialize
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color_schemes.each do |c|
unless ColorScheme.where(name: c[:name]).exists?
ColorScheme.create_from_base(name: c[:name], colors: c[:colors])
end
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end
initializers.each do |callback|
begin
callback.call(self)
rescue ActiveRecord::StatementInvalid => e
# When running `db:migrate` for the first time on a new database,
# plugin initializers might try to use models.
# Tolerate it.
raise e unless e.message.try(:include?, "PG::UndefinedTable")
end
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end
end
def notify_before_auth
before_auth_initializers.each do |callback|
callback.call(self)
end
@before_auth_complete = true
end
# Applies to all sites in a multisite environment. Ignores plugin.enabled?
def register_category_custom_field_type(name, type)
reloadable_patch do |plugin|
Category.register_custom_field_type(name, type)
end
end
# Applies to all sites in a multisite environment. Ignores plugin.enabled?
def register_topic_custom_field_type(name, type)
reloadable_patch do |plugin|
::Topic.register_custom_field_type(name, type)
end
end
# Applies to all sites in a multisite environment. Ignores plugin.enabled?
def register_post_custom_field_type(name, type)
reloadable_patch do |plugin|
::Post.register_custom_field_type(name, type)
end
end
# Applies to all sites in a multisite environment. Ignores plugin.enabled?
def register_group_custom_field_type(name, type)
reloadable_patch do |plugin|
::Group.register_custom_field_type(name, type)
end
end
# Applies to all sites in a multisite environment. Ignores plugin.enabled?
def register_user_custom_field_type(name, type)
reloadable_patch do |plugin|
::User.register_custom_field_type(name, type)
end
end
def register_seedfu_fixtures(paths)
paths = [paths] if !paths.kind_of?(Array)
SeedFu.fixture_paths.concat(paths)
end
def listen_for(event_name)
return unless self.respond_to?(event_name)
DiscourseEvent.on(event_name, &self.method(event_name))
end
def register_css(style)
styles << style
end
def register_javascript(js)
javascripts << js
end
Upgrade to FontAwesome 5 (take two) (#6673) * Add missing icons to set * Revert FA5 revert This reverts commit 42572ff * use new SVG syntax in locales * Noscript page changes (remove login button, center "powered by" footer text) * Cast wider net for SVG icons in settings - include any _icon setting for SVG registry (offers better support for plugin settings) - let themes store multiple pipe-delimited icons in a setting - also replaces broken onebox image icon with SVG reference in cooked post processor * interpolate icons in locales * Fix composer whisper icon alignment * Add support for stacked icons * SECURITY: enforce hostname to match discourse hostname This ensures that the hostname rails uses for various helpers always matches the Discourse hostname * load SVG sprite with pre-initializers * FIX: enable caching on SVG sprites * PERF: use JSONP for SVG sprites so they are served from CDN This avoids needing to deal with CORS for loading of the SVG Note, added the svg- prefix to the filename so we can quickly tell in dev tools what the file is * Add missing SVG sprite JSONP script to CSP * Upgrade to FA 5.5.0 * Add support for all FA4.7 icons - adds complete frontend and backend for renamed FA4.7 icons - improves performance of SvgSprite.bundle and SvgSprite.all_icons * Fix group avatar flair preview - adds an endpoint at /svg-sprites/search/:keyword - adds frontend ajax call that pulls icon in avatar flair preview even when it is not in subset * Remove FA 4.7 font files
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def register_svg_icon(icon)
DiscoursePluginRegistry.register_svg_icon(icon)
end
def extend_content_security_policy(extension)
csp_extensions << extension
end
# Register a block to run when adding css and js assets
# Two arguments will be passed: (type, request)
# Type is :css or :js. `request` is an instance of Rack::Request
# When using this, make sure to consider the effect on AnonymousCache
def register_asset_filter(&blk)
asset_filters << blk
end
# @option opts [String] :name
# @option opts [String] :nativeName
# @option opts [String] :fallbackLocale
# @option opts [Hash] :plural
def register_locale(locale, opts = {})
locales << [locale, opts]
end
def register_custom_html(hash)
DiscoursePluginRegistry.custom_html.merge!(hash)
end
def register_html_builder(name, &block)
plugin = self
DiscoursePluginRegistry.register_html_builder(name) do |*args|
block.call(*args) if plugin.enabled?
end
end
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def register_asset(file, opts = nil)
if opts && opts == :vendored_core_pretty_text
full_path = DiscoursePluginRegistry.core_asset_for_name(file)
else
full_path = File.dirname(path) << "/assets/" << file
end
assets << [full_path, opts, directory_name]
end
def register_service_worker(file, opts = nil)
service_workers << [
File.join(File.dirname(path), 'assets', file),
opts
]
end
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def register_color_scheme(name, colors)
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color_schemes << { name: name, colors: colors }
end
def register_seed_data(key, value)
seed_data[key] = value
end
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def register_seed_path_builder(&block)
DiscoursePluginRegistry.register_seed_path_builder(&block)
end
def register_emoji(name, url, group = Emoji::DEFAULT_GROUP)
Plugin::CustomEmoji.register(name, url, group)
Emoji.clear_cache
end
def translate_emoji(from, to)
Plugin::CustomEmoji.translate(from, to)
end
def automatic_assets
css = styles.join("\n")
js = javascripts.join("\n")
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# Generate an IIFE for the JS
js = "(function(){#{js}})();" if js.present?
result = []
result << [css, 'css'] if css.present?
result << [js, 'js'] if js.present?
result.map do |asset, extension|
hash = Digest::SHA1.hexdigest asset
["#{auto_generated_path}/plugin_#{hash}.#{extension}", asset]
end
end
# note, we need to be able to parse seperately to activation.
# this allows us to present information about a plugin in the UI
# prior to activations
def activate!
if @path
root_dir_name = File.dirname(@path)
# Automatically include all ES6 JS and hbs files
root_path = "#{root_dir_name}/assets/javascripts"
DiscoursePluginRegistry.register_glob(root_path, 'js.es6')
DiscoursePluginRegistry.register_glob(root_path, 'hbs')
DiscoursePluginRegistry.register_glob(root_path, 'hbr')
admin_path = "#{root_dir_name}/admin/assets/javascripts"
DiscoursePluginRegistry.register_glob(admin_path, 'js.es6', admin: true)
DiscoursePluginRegistry.register_glob(admin_path, 'hbs', admin: true)
DiscoursePluginRegistry.register_glob(admin_path, 'hbr', admin: true)
if transpile_js
DiscourseJsProcessor.plugin_transpile_paths << root_path.sub(Rails.root.to_s, '').sub(/^\/*/, '')
DiscourseJsProcessor.plugin_transpile_paths << admin_path.sub(Rails.root.to_s, '').sub(/^\/*/, '')
end
end
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self.instance_eval File.read(path), path
if auto_assets = generate_automatic_assets!
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assets.concat(auto_assets)
end
register_assets! unless assets.blank?
register_locales!
register_service_workers!
seed_data.each do |key, value|
DiscoursePluginRegistry.register_seed_data(key, value)
end
# TODO: possibly amend this to a rails engine
# Automatically include assets
Rails.configuration.assets.paths << auto_generated_path
Rails.configuration.assets.paths << File.dirname(path) + "/assets"
Rails.configuration.assets.paths << File.dirname(path) + "/admin/assets"
Rails.configuration.assets.paths << File.dirname(path) + "/test/javascripts"
# Automatically include rake tasks
Rake.add_rakelib(File.dirname(path) + "/lib/tasks")
# Automatically include migrations
migration_paths = ActiveRecord::Tasks::DatabaseTasks.migrations_paths
migration_paths << File.dirname(path) + "/db/migrate"
unless Discourse.skip_post_deployment_migrations?
migration_paths << "#{File.dirname(path)}/#{Discourse::DB_POST_MIGRATE_PATH}"
end
public_data = File.dirname(path) + "/public"
if Dir.exists?(public_data)
target = Rails.root.to_s + "/public/plugins/"
Discourse::Utils.execute_command('mkdir', '-p', target)
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target << name.gsub(/\s/, "_")
Discourse::Utils.atomic_ln_s(public_data, target)
end
ensure_directory(js_file_path)
contents = []
handlebars_includes.each { |hb| contents << "require_asset('#{hb}')" }
javascript_includes.each { |js| contents << "require_asset('#{js}')" }
each_globbed_asset do |f, is_dir|
contents << (is_dir ? "depend_on('#{f}')" : "require_asset('#{f}')")
end
if contents.present?
contents.insert(0, "<%")
contents << "%>"
Discourse::Utils.atomic_write_file(js_file_path, contents.join("\n"))
else
begin
File.delete(js_file_path)
rescue Errno::ENOENT
end
end
end
def auth_provider(opts)
before_auth do
provider = Auth::AuthProvider.new
Auth::AuthProvider.auth_attributes.each do |sym|
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provider.public_send("#{sym}=", opts.delete(sym)) if opts.has_key?(sym)
end
begin
provider.authenticator.enabled?
rescue NotImplementedError
provider.authenticator.define_singleton_method(:enabled?) do
Discourse.deprecate("#{provider.authenticator.class.name} should define an `enabled?` function. Patching for now.")
return SiteSetting.get(provider.enabled_setting) if provider.enabled_setting
Discourse.deprecate("#{provider.authenticator.class.name} has not defined an enabled_setting. Defaulting to true.")
true
end
end
DiscoursePluginRegistry.register_auth_provider(provider)
end
end
# shotgun approach to gem loading, in future we need to hack bundler
# to at least determine dependencies do not clash before loading
#
# Additionally we want to support multiple ruby versions correctly and so on
#
# This is a very rough initial implementation
def gem(name, version, opts = {})
PluginGem.load(path, name, version, opts)
end
def hide_plugin
Discourse.hidden_plugins << self
end
def enabled_site_setting_filter(filter = nil)
STDERR.puts("`enabled_site_setting_filter` is deprecated")
end
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def enabled_site_setting(setting = nil)
if setting
@enabled_site_setting = setting
else
@enabled_site_setting
end
end
def handlebars_includes
assets.map do |asset, opts|
next if opts == :admin
next unless asset =~ DiscoursePluginRegistry::HANDLEBARS_REGEX
asset
end.compact
end
def javascript_includes
assets.map do |asset, opts|
next if opts == :vendored_core_pretty_text
next if opts == :admin
next unless asset =~ DiscoursePluginRegistry::JS_REGEX
asset
end.compact
end
def each_globbed_asset
if @path
# Automatically include all ES6 JS and hbs files
root_path = "#{File.dirname(@path)}/assets/javascripts"
admin_path = "#{File.dirname(@path)}/admin/assets/javascripts"
Dir.glob(["#{root_path}/**/*", "#{admin_path}/**/*"]) do |f|
f_str = f.to_s
if File.directory?(f)
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yield [f, true]
elsif f_str.ends_with?(".js.es6") || f_str.ends_with?(".hbs") || f_str.ends_with?(".hbr")
yield [f, false]
elsif transpile_js && f_str.ends_with?(".js")
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yield [f, false]
end
end
end
end
def register_reviewable_type(reviewable_type_class)
extend_list_method Reviewable, :types, [reviewable_type_class.name]
end
def extend_list_method(klass, method, new_attributes)
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current_list = klass.public_send(method)
current_list.concat(new_attributes)
reloadable_patch do
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klass.public_send(:define_singleton_method, method) { current_list }
end
end
def directory_name
@directory_name ||= File.dirname(path).split("/").last
end
def css_asset_exists?(target = nil)
DiscoursePluginRegistry.stylesheets_exists?(directory_name, target)
end
def js_asset_exists?
File.exists?(js_file_path)
end
# Receives an array with two elements:
# 1. A symbol that represents the name of the value to filter.
# 2. A Proc that takes the existing ActiveRecord::Relation and the value received from the front-end.
def add_custom_reviewable_filter(filter)
reloadable_patch do
Reviewable.add_custom_filter(filter)
end
end
protected
def self.js_path
File.expand_path "#{Rails.root}/app/assets/javascripts/plugins"
end
def js_file_path
@file_path ||= "#{Plugin::Instance.js_path}/#{directory_name}.js.erb"
end
def register_assets!
assets.each do |asset, opts, plugin_directory_name|
DiscoursePluginRegistry.register_asset(asset, opts, plugin_directory_name)
end
end
def register_service_workers!
service_workers.each do |asset, opts|
DiscoursePluginRegistry.register_service_worker(asset, opts)
end
end
def register_locales!
root_path = File.dirname(@path)
locales.each do |locale, opts|
opts = opts.dup
opts[:client_locale_file] = File.join(root_path, "config/locales/client.#{locale}.yml")
opts[:server_locale_file] = File.join(root_path, "config/locales/server.#{locale}.yml")
opts[:js_locale_file] = File.join(root_path, "assets/locales/#{locale}.js.erb")
locale_chain = opts[:fallbackLocale] ? [locale, opts[:fallbackLocale]] : [locale]
lib_locale_path = File.join(root_path, "lib/javascripts/locale")
path = File.join(lib_locale_path, "message_format")
opts[:message_format] = find_locale_file(locale_chain, path)
opts[:message_format] = JsLocaleHelper.find_message_format_locale(locale_chain, fallback_to_english: false) unless opts[:message_format]
path = File.join(lib_locale_path, "moment_js")
opts[:moment_js] = find_locale_file(locale_chain, path)
opts[:moment_js] = JsLocaleHelper.find_moment_locale(locale_chain) unless opts[:moment_js]
path = File.join(lib_locale_path, "moment_js_timezones")
opts[:moment_js_timezones] = find_locale_file(locale_chain, path)
opts[:moment_js_timezones] = JsLocaleHelper.find_moment_locale(locale_chain, timezone_names: true) unless opts[:moment_js_timezones]
if valid_locale?(opts)
DiscoursePluginRegistry.register_locale(locale, opts)
Rails.configuration.assets.precompile << "locales/#{locale}.js"
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else
msg = "Invalid locale! #{opts.inspect}"
# The logger isn't always present during boot / parsing locales from plugins
if Rails.logger.present?
Rails.logger.error(msg)
else
puts msg
end
end
end
end
def allow_new_queued_post_payload_attribute(attribute_name)
reloadable_patch do
NewPostManager.add_plugin_payload_attribute(attribute_name)
end
end
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private
def write_asset(path, contents)
unless File.exists?(path)
ensure_directory(path)
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File.open(path, "w") { |f| f.write(contents) }
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end
end
def reloadable_patch(plugin = self)
if Rails.env.development? && defined?(ActiveSupport::Reloader)
ActiveSupport::Reloader.to_prepare do
# reload the patch
yield plugin
end
end
# apply the patch
yield plugin
end
def valid_locale?(custom_locale)
File.exist?(custom_locale[:client_locale_file]) &&
File.exist?(custom_locale[:server_locale_file]) &&
File.exist?(custom_locale[:js_locale_file]) &&
custom_locale[:message_format] && custom_locale[:moment_js]
end
def find_locale_file(locale_chain, path)
locale_chain.each do |locale|
filename = File.join(path, "#{locale}.js")
return [locale, filename] if File.exist?(filename)
end
nil
end
end