Custom page link texts, optional post title

CHDataManagement/Model/Post.swift

@@ -107,11 +107,17 @@ final class Post: Item {
         tags.append(tag)
     }
 
-    func localized(in language: ContentLanguage) -> LocalizedPost {
-        switch language {
-        case .english: return english
-        case .german: return german
-        }
+    /**
+     A title for the UI, not the generation.
+     */
+    override func title(in language: ContentLanguage) -> String {
+        localized(in: language).title ?? id
+    }
+
+    func contains(_ string: String) -> Bool {
+        id.contains(string) ||
+        german.contains(string) ||
+        english.contains(string)
     }
 
     func isValid(id: String) -> Bool {
@@ -134,3 +140,7 @@ final class Post: Item {
 extension Post: DateItem {
 
 }
+
+extension Post: LocalizedItem {
+
+}