Remove caching verbosely, add cached_cover_url

src/library/cache.cr

@@ -70,21 +70,6 @@ class SortedEntriesCacheEntry < CacheEntry(Array(String), Array(Entry))
   end
 end
 
-class SortOptionsCacheEntry < CacheEntry(Tuple(String, Bool), SortOptions)
-  def self.to_save_t(value : SortOptions)
-    value.to_tuple
-  end
-
-  def self.to_return_t(value : Tuple(String, Bool))
-    SortOptions.from_tuple value
-  end
-
-  def instance_size
-    instance_sizeof(SortOptionsCacheEntry) +
-      @value[0].instance_size
-  end
-end
-
 class String
   def instance_size
     instance_sizeof(String) + bytesize
@@ -105,18 +90,14 @@ struct Tuple(*T)
   end
 end
 
-alias CacheableType = Array(Entry) | String | Tuple(String, Int32) |
-                      SortOptions
+alias CacheableType = Array(Entry) | String | Tuple(String, Int32)
 alias CacheEntryType = SortedEntriesCacheEntry |
-                       SortOptionsCacheEntry |
                        CacheEntry(String, String) |
                        CacheEntry(Tuple(String, Int32), Tuple(String, Int32))
 
 def generate_cache_entry(key : String, value : CacheableType)
   if value.is_a? Array(Entry)
     SortedEntriesCacheEntry.new key, value
-  elsif value.is_a? SortOptions
-    SortOptionsCacheEntry.new key, value
   else
     CacheEntry(typeof(value), typeof(value)).new key, value
   end

src/library/entry.cr

@@ -81,8 +81,6 @@ class Entry
 
   def cover_url
     return "#{Config.current.base_url}img/icon.png" if @err_msg
-    cached_cover_url = LRUCache.get "#{@id}:cover_url"
-    return cached_cover_url if cached_cover_url.is_a? String
 
     unless @book.entry_cover_url_cache
       TitleInfo.new @book.dir do |info|
@@ -98,7 +96,6 @@ class Entry
         url = File.join Config.current.base_url, info_url
       end
     end
-    LRUCache.set generate_cache_entry "#{@id}:cover_url", url
     url
   end
 

src/library/title.cr

@@ -11,6 +11,7 @@ class Title
   @entry_display_name_cache : Hash(String, String)?
   @entry_cover_url_cache : Hash(String, String)?
   @cached_display_name : String?
+  @cached_cover_url : String?
 
   def initialize(@dir : String, @parent_id)
     storage = Storage.default
@@ -230,8 +231,8 @@ class Title
   end
 
   def cover_url
-    cached_cover_url = LRUCache.get "#{@id}:cover_url"
-    return cached_cover_url if cached_cover_url.is_a? String
+    cached_cover_url = @cached_cover_url
+    return cached_cover_url unless cached_cover_url.nil?
 
     url = "#{Config.current.base_url}img/icon.png"
     readable_entries = @entries.select &.err_msg.nil?
@@ -244,12 +245,11 @@ class Title
         url = File.join Config.current.base_url, info_url
       end
     end
-    LRUCache.set generate_cache_entry "#{@id}:cover_url", url
+    @cached_cover_url = url
     url
   end
 
   def set_cover_url(url : String)
-    LRUCache.invalidate "#{@id}:cover_url"
     TitleInfo.new @dir do |info|
       info.cover_url = url
       info.save
@@ -257,8 +257,6 @@ class Title
   end
 
   def set_cover_url(entry_name : String, url : String)
-    selected_entry = @entries.find { |entry| entry.display_name == entry_name }
-    LRUCache.invalidate "#{selected_entry.id}:cover_url" if selected_entry
     TitleInfo.new @dir do |info|
       info.entry_cover_url[entry_name] = url
       info.save

src/library/types.cr

@@ -35,16 +35,12 @@ class SortOptions
   end
 
   def self.from_info_json(dir, username)
-    key = "#{dir}:#{username}:sort_opt"
-    cached_opt = LRUCache.get key
-    return cached_opt if cached_opt.is_a? SortOptions
     opt = SortOptions.new
     TitleInfo.new dir do |info|
       if info.sort_by.has_key? username
         opt = SortOptions.from_tuple info.sort_by[username]
       end
     end
-    LRUCache.set generate_cache_entry key, opt
     opt
   end
 

src/util/web.cr

@@ -121,7 +121,6 @@ macro get_and_save_sort_opt(dir)
     sort_opt = SortOptions.new sort_method, is_ascending
 
     key = "#{{{dir}}}:#{username}:sort_opt"
-    LRUCache.set generate_cache_entry key, sort_opt
     TitleInfo.new {{dir}} do |info|
       info.sort_by[username] = sort_opt.to_tuple
       info.save