Add config options for optimization tasks

src/config.cr

@@ -11,8 +11,9 @@ class Config
   property library_path : String = File.expand_path "~/mango/library",
     home: true
   property db_path : String = File.expand_path "~/mango/mango.db", home: true
-  @[YAML::Field(key: "scan_interval_minutes")]
-  property scan_interval : Int32 = 5
+  property scan_interval_minutes : Int32 = 5
+  property thumbnail_generation_interval_hours : Int32 = 24
+  property db_optimization_interval_hours : Int32 = 24
   property log_level : String = "info"
   property upload_path : String = File.expand_path "~/mango/uploads",
     home: true

src/library/library.cr

@@ -1,6 +1,7 @@
 class Library
   property dir : String, title_ids : Array(String), scan_interval : Int32,
-    title_hash : Hash(String, Title)
+    title_hash : Hash(String, Title), entries_count = 0,
+    thumbnails_count = 0
 
   use_default
 

src/views/home.html.ecr

@@ -11,7 +11,7 @@
       <dd>Update <code>config.yml</code> located at: <code><%= Config.current.path %></code></dd>
       <dt style="font-weight: 500;">Can't see your files yet?</dt>
       <dd>
-            You must wait <%= Config.current.scan_interval %> minutes for the library scan to complete
+      You must wait <%= Config.current.scan_interval_minutes %> minutes for the library scan to complete
       <% if is_admin %>
         , or manually re-scan from <a href="<%= base_url %>admin">Admin</a>
       <% end %>.