Use Rails cache store in Front Cache plugin

app/apps/plugins/front_cache/admin_controller.rb

@@ -11,7 +11,8 @@ def save_settings
                                                    post_types: (params[:cache][:post_type]||[]),
                                                    skip_posts: (params[:cache][:skip_posts]||[]),
                                                    cache_login: params[:cache][:cache_login],
-                                                   home: params[:cache][:home]
+                                                   home: params[:cache][:home],
+                                                   preserve_cache_on_restart: params[:cache][:preserve_cache_on_restart]
                                                   })
     flash[:notice] = "#{t('plugin.front_cache.message.settings_saved')}"
     redirect_to action: :settings
@@ -20,7 +21,7 @@ def save_settings
   def clean_cache
     flash[:notice] = "#{t('plugin.front_cache.message.cache_destroyed')}"
     front_cache_clean()
-    if Rails.version.to_s[0].to_i < 5
+    if Rails.version.to_i < 5
       redirect_to :back
     else
       redirect_back(fallback_location: '/admin/plugins')

app/apps/plugins/front_cache/config/config.json

@@ -1,7 +1,7 @@
 {
   "title": "Front Cache",
   "descr": "Please check documentation <a href='http://camaleon.tuzitio.com/store/plugins/3'>here.</a>",
-  "version": "0.1",
+  "version": "0.2",
   "key": "front_cache",
   "position": 1,
   "helpers": [
@@ -18,4 +18,4 @@
     "front_after_load": ["front_cache_front_after_load"]
     //here you can add all your hooks (read documentation)
   }
-}
+}

app/apps/plugins/front_cache/front_cache_helper.rb

@@ -2,15 +2,15 @@ module Plugins::FrontCache::FrontCacheHelper
 
   # save as cache all pages configured on settings of this plugin for public users
   def front_cache_front_before_load
-    if current_site.get_option("refresh_cache") # clear cache every restart server
-      front_cache_clean
+    if current_site.get_option("refresh_cache") # clear cache every restart server unless option checked in settings
+      front_cache_clean unless current_site.get_meta("front_cache_elements")[:preserve_cache_on_restart]
       current_site.set_option("refresh_cache", false)
     end
 
     return if signin? || Rails.env == "development" || Rails.env == "test" || !request.get? # avoid cache if current visitor is logged in or development environment
 
     cache_key = request.fullpath.parameterize
-    if !flash.keys.present? && front_cache_exist?(cache_key) # recover cache file
+    if !flash.keys.present? && front_cache_exist?(cache_key) # recover cache item
       Rails.logger.info "Camaleon CMS - readed cache: #{front_cache_plugin_get_path(cache_key)}"
       response.headers['PLUGIN_FRONT_CACHE'] = 'TRUE'
       args = {data: front_cache_get(cache_key).gsub("{{form_authenticity_token}}", form_authenticity_token)}; hooks_run('front_cache_reading_cache', args)
@@ -87,38 +87,32 @@ def front_cache_post_requests
     end
   end
 
-  # clear all frontend cache files
+  # clear all frontend cache items
   def front_cache_clean
-    FileUtils.rm_rf(front_cache_plugin_get_path) # clear site pages cache
+    Rails.cache.clear
   end
 
   private
 
   def front_cache_exist?(key)
-    File.exist?(front_cache_plugin_get_path(key))
+    !(Rails.cache.read(key).nil?)
   end
 
   def front_cache_get(key)
-    File.read(front_cache_plugin_get_path(key))
-  end
-
-  def front_cache_destroy(key)
-    FileUtils.rm_f(front_cache_plugin_get_path(key)) # clear site pages cache
+    Rails.cache.read(key)
   end
 
   def front_cache_plugin_cache_create(key, content)
-    FileUtils.mkdir_p(front_cache_plugin_get_path) unless Dir.exist?(front_cache_plugin_get_path)
-    File.open(front_cache_plugin_get_path(key), 'wb'){ |fo| fo.write(content) }
-    content
+    Rails.cache.write(front_cache_plugin_get_path(key), content)
   end
 
   # return the physical path of cache directory
   # key: (string, optional) the key of the cached page
   def front_cache_plugin_get_path(key = nil)
     unless key.nil?
-      Rails.root.join("tmp", "cache", "pages", current_site.id.to_s, "#{key}.html").to_s
+      "pages/#{current_site.id.to_s}/#{key}"
     else
-      Rails.root.join("tmp", "cache", "pages", current_site.id.to_s).to_s
+      "pages/#{current_site.id.to_s}"
     end
 
   end

app/apps/plugins/front_cache/views/admin/settings.html.erb

@@ -20,6 +20,11 @@
     </div>
     <div class="panel-body">
         <div class="alert alert-info"><%= t('plugin.front_cache.message.please_checkpost_need_cache') %></div>
+        <div class="form-group">
+            <label>Preserve cache on restart</label><br>
+            <%= check_box_tag("cache[preserve_cache_on_restart]", 1, @caches[:preserve_cache_on_restart]) %>
+        </div>
+
         <div class="form-group">
             <label><%= t('plugin.front_cache.home_page') %></label><br>
             <%= check_box_tag("cache[home]", 1, @caches[:home]) %>