3 files changed, 150 insertions, 0 deletions
diff --git a/app/controllers/concerns/captcha_concern.rb b/app/controllers/concerns/captcha_concern.rb
new file mode 100644
index 000000000..538c1ffb1
--- /dev/null
+++ b/app/controllers/concerns/captcha_concern.rb
@@ -0,0 +1,59 @@
+# frozen_string_literal: true
+
+module CaptchaConcern
+  extend ActiveSupport::Concern
+  include Hcaptcha::Adapters::ViewMethods
+
+  included do
+    helper_method :render_captcha
+  end
+
+  def captcha_available?
+    ENV['HCAPTCHA_SECRET_KEY'].present? && ENV['HCAPTCHA_SITE_KEY'].present?
+  end
+
+  def captcha_enabled?
+    captcha_available? && Setting.captcha_enabled
+  end
+
+  def captcha_user_bypass?
+    false
+  end
+
+  def captcha_required?
+    captcha_enabled? && !captcha_user_bypass?
+  end
+
+  def check_captcha!
+    return true unless captcha_required?
+
+    if verify_hcaptcha
+      true
+    else
+      if block_given?
+        message = flash[:hcaptcha_error]
+        flash.delete(:hcaptcha_error)
+        yield message
+      end
+      false
+    end
+  end
+
+  def extend_csp_for_captcha!
+    policy = request.content_security_policy
+    return unless captcha_required? && policy.present?
+
+    %w(script_src frame_src style_src connect_src).each do |directive|
+      values = policy.send(directive)
+      values << 'https://hcaptcha.com' unless values.include?('https://hcaptcha.com') || values.include?('https:')
+      values << 'https://*.hcaptcha.com' unless values.include?('https://*.hcaptcha.com') || values.include?('https:')
+      policy.send(directive, *values)
+    end
+  end
+
+  def render_captcha
+    return unless captcha_required?
+
+    hcaptcha_tags
+  end
+end
diff --git a/app/controllers/concerns/theming_concern.rb b/app/controllers/concerns/theming_concern.rb
new file mode 100644
index 000000000..f993a81d7
--- /dev/null
+++ b/app/controllers/concerns/theming_concern.rb
@@ -0,0 +1,89 @@
+# frozen_string_literal: true
+
+module ThemingConcern
+  extend ActiveSupport::Concern
+
+  def use_pack(pack_name)
+    @core = resolve_pack_with_common(Themes.instance.core, pack_name)
+    @theme = resolve_pack_with_common(Themes.instance.flavour(current_flavour), pack_name, current_skin)
+  end
+
+  private
+
+  def current_flavour
+    [current_user&.setting_flavour, Setting.flavour, 'glitch', 'vanilla'].find { |flavour| Themes.instance.flavours.include?(flavour) }
+  end
+
+  def current_skin
+    skins = Themes.instance.skins_for(current_flavour)
+    [current_user&.setting_skin, Setting.skin, 'default'].find { |skin| skins.include?(skin) }
+  end
+
+  def valid_pack_data?(data, pack_name)
+    data['pack'].is_a?(Hash) && data['pack'][pack_name].present?
+  end
+
+  def nil_pack(data)
+    {
+      use_common: true,
+      flavour: data['name'],
+      pack: nil,
+      preload: nil,
+      skin: nil,
+      supported_locales: data['locales'],
+    }
+  end
+
+  def pack(data, pack_name, skin)
+    pack_data = {
+      use_common: true,
+      flavour: data['name'],
+      pack: pack_name,
+      preload: nil,
+      skin: nil,
+      supported_locales: data['locales'],
+    }
+
+    return pack_data unless data['pack'][pack_name].is_a?(Hash)
+
+    pack_data[:use_common] = false if data['pack'][pack_name]['use_common'] == false
+    pack_data[:pack] = nil unless data['pack'][pack_name]['filename']
+
+    preloads = data['pack'][pack_name]['preload']
+    pack_data[:preload] = [preloads] if preloads.is_a?(String)
+    pack_data[:preload] = preloads if preloads.is_a?(Array)
+
+    if skin != 'default' && data['skin'][skin]
+      pack_data[:skin] = skin if data['skin'][skin].include?(pack_name)
+    elsif data['pack'][pack_name]['stylesheet']
+      pack_data[:skin] = 'default'
+    end
+
+    pack_data
+  end
+
+  def resolve_pack(data, pack_name, skin)
+    return pack(data, pack_name, skin) if valid_pack_data?(data, pack_name)
+    return if data['name'].blank?
+
+    fallbacks = []
+    if data.key?('fallback')
+      fallbacks = data['fallback'] if data['fallback'].is_a?(Array)
+      fallbacks = [data['fallback']] if data['fallback'].is_a?(String)
+    elsif data['name'] != Setting.default_settings['flavour']
+      fallbacks = [Setting.default_settings['flavour']]
+    end
+
+    fallbacks.each do |fallback|
+      return resolve_pack(Themes.instance.flavour(fallback), pack_name) if Themes.instance.flavour(fallback)
+    end
+
+    nil
+  end
+
+  def resolve_pack_with_common(data, pack_name, skin = 'default')
+    result = resolve_pack(data, pack_name, skin) || nil_pack(data)
+    result[:common] = resolve_pack(data, 'common', skin) if result.delete(:use_common)
+    result
+  end
+end
diff --git a/app/controllers/concerns/two_factor_authentication_concern.rb b/app/controllers/concerns/two_factor_authentication_concern.rb
index 27f2367a8..c9477a1d4 100644
--- a/app/controllers/concerns/two_factor_authentication_concern.rb
+++ b/app/controllers/concerns/two_factor_authentication_concern.rb
@@ -77,6 +77,8 @@ module TwoFactorAuthenticationConcern
   def prompt_for_two_factor(user)
     set_attempt_session(user)
 
+    use_pack 'auth'
+
     @body_classes     = 'lighter'
     @webauthn_enabled = user.webauthn_enabled?
     @scheme_type      = begin