From f471c6a72be032973bac35040384f9f9d1934a6e Mon Sep 17 00:00:00 2001
From: Hellow2 <lars.noack@outlook.de>
Date: Fri, 16 Jun 2023 10:43:35 +0200
Subject: [PATCH] implemented the deletion of unnecesarry details in not chosen
 objects, for the sake of memory efficiency in the history

---
 src/music_kraken/cli/download/shell.py | 5 ++++-
 src/music_kraken/download/results.py   | 7 +++++++
 src/music_kraken/objects/collection.py | 3 +++
 src/music_kraken/objects/parents.py    | 4 ++++
 4 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/src/music_kraken/cli/download/shell.py b/src/music_kraken/cli/download/shell.py
index 91f546f..03e804f 100644
--- a/src/music_kraken/cli/download/shell.py
+++ b/src/music_kraken/cli/download/shell.py
@@ -167,7 +167,7 @@ class Shell:
         self.max_displayed_options = max_displayed_options
         self.option_digits: int = option_digits
         
-        self.current_results: Results = SearchResults
+        self.current_results: Results = None
         self._result_history: List[Results] = []
         
         self.genre = genre or get_genre()
@@ -296,6 +296,9 @@ class Shell:
         page: Type[Page]
         music_object: DatabaseObject
         
+        if self.current_results is not None:
+            self.current_results.delete_details(index)
+        
         try:
             page, music_object = self.current_results.get_music_object_by_index(index)
         except KeyError:
diff --git a/src/music_kraken/download/results.py b/src/music_kraken/download/results.py
index fa41369..631ad48 100644
--- a/src/music_kraken/download/results.py
+++ b/src/music_kraken/download/results.py
@@ -29,6 +29,13 @@ class Results:
     def get_music_object_by_index(self, index: int) -> Tuple[Type[Page], DatabaseObject]:
         # if this throws a key error, either the formated generator needs to be iterated, or the option doesn't exist.
         return self._page_by_index[index], self._by_index[index]
+    
+    def delete_details(self, exclude_index: int):
+        for index, music_object in self._by_index.items():
+            if index == exclude_index:
+                continue
+            
+            music_object.strip_details()
 
 
 class SearchResults(Results):
diff --git a/src/music_kraken/objects/collection.py b/src/music_kraken/objects/collection.py
index 2daf0fa..675fd7e 100644
--- a/src/music_kraken/objects/collection.py
+++ b/src/music_kraken/objects/collection.py
@@ -158,3 +158,6 @@ class Collection:
     @property
     def empty(self) -> bool:
         return len(self._data) == 0
+
+    def clear(self):
+        self.__init__(element_type=self.element_type)
diff --git a/src/music_kraken/objects/parents.py b/src/music_kraken/objects/parents.py
index 9185a82..3121d4f 100644
--- a/src/music_kraken/objects/parents.py
+++ b/src/music_kraken/objects/parents.py
@@ -95,6 +95,10 @@ class DatabaseObject:
             if override or getattr(self, simple_attribute) == default_value:
                 setattr(self, simple_attribute, getattr(other, simple_attribute))
 
+    def strip_details(self):
+        for collection in type(self).DOWNWARDS_COLLECTION_ATTRIBUTES:
+            getattr(self, collection).clear()
+
     @property
     def metadata(self) -> Metadata:
         return Metadata()