GRN2-134: Added Color Input for lighten and darken (#529)

* Added Color Input for lighten and darken

* rspec

app/controllers/admins_controller.rb

@@ -18,10 +18,11 @@
 
 class AdminsController < ApplicationController
   include Pagy::Backend
+  include Themer
   include Emailer
 
   manage_users = [:edit_user, :promote, :demote, :ban_user, :unban_user, :approve]
-  site_settings = [:branding, :coloring, :registration_method]
+  site_settings = [:branding, :coloring, :coloring_lighten, :coloring_darken, :registration_method]
 
   authorize_resource class: false
   before_action :find_user, only: manage_users
@@ -107,6 +108,18 @@ class AdminsController < ApplicationController
   # POST /admins/color
   def coloring
     @settings.update_value("Primary Color", params[:color])
+    @settings.update_value("Primary Color Lighten", color_lighten(params[:color]))
+    @settings.update_value("Primary Color Darken", color_darken(params[:color]))
+    redirect_to admins_path
+  end
+
+  def coloring_lighten
+    @settings.update_value("Primary Color Lighten", params[:color])
+    redirect_to admins_path
+  end
+
+  def coloring_darken
+    @settings.update_value("Primary Color Darken", params[:color])
     redirect_to admins_path
   end
 

app/controllers/concerns/themer.rb

@@ -0,0 +1,47 @@
+# frozen_string_literal: true
+
+# BigBlueButton open source conferencing system - http://www.bigbluebutton.org/.
+#
+# Copyright (c) 2018 BigBlueButton Inc. and by respective authors (see below).
+#
+# This program is free software; you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free Software
+# Foundation; either version 3.0 of the License, or (at your option) any later
+# version.
+#
+# BigBlueButton is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
+
+module Themer
+extend ActiveSupport::Concern
+
+# Lightens a color by 40%
+def color_lighten(color)
+  # Uses the built in Sass Engine to lighten the color
+
+  dummy_scss = "h1 { color: $lighten; }"
+  compiled = Sass::Engine.new("$lighten:lighten(#{color}, 40%);" + dummy_scss, syntax: :scss).render
+
+  string_locater = 'color: '
+  color_start = compiled.index(string_locater) + string_locater.length
+
+  compiled[color_start..color_start + 6]
+end
+
+# Darkens a color by 10%
+def color_darken(color)
+  # Uses the built in Sass Engine to darken the color
+
+  dummy_scss = "h1 { color: $darken; }"
+  compiled = Sass::Engine.new("$darken:darken(#{color}, 10%);" + dummy_scss, syntax: :scss).render
+
+  string_locater = 'color: '
+  color_start = compiled.index(string_locater) + string_locater.length
+
+  compiled[color_start..color_start + 6]
+end
+end

app/controllers/themes_controller.rb

@@ -22,13 +22,16 @@ class ThemesController < ApplicationController
   # GET /primary
   def index
     color = @settings.get_value("Primary Color") || Rails.configuration.primary_color_default
+    lighten_color = @settings.get_value("Primary Color Lighten") || Rails.configuration.primary_color_lighten_default
+    darken_color = @settings.get_value("Primary Color Darken") || Rails.configuration.primary_color_darken_default
+
     file_name = Rails.root.join('app', 'assets', 'stylesheets', 'utilities', '_primary_themes.scss')
     @file_contents = File.read(file_name)
 
     # Include the variables and covert scss file to css
     @compiled = Sass::Engine.new("$primary-color:#{color};" \
-                                 "$primary-color-lighten:lighten(#{color}, 40%);" \
-                                 "$primary-color-darken:darken(#{color}, 10%);" +
+                                 "$primary-color-lighten:#{lighten_color};" \
+                                 "$primary-color-darken:#{darken_color};" +
                                  @file_contents, syntax: :scss).render
 
     respond_to do |format|