Implement empty chat filtering from SQL #112

This commit also removed the old empty chat filtering logic.

Whatsapp_Chat_Exporter/utility.py

@@ -220,6 +220,10 @@ def get_file_name(contact: str, chat: ChatStore):
     return sanitize_filename(file_name), name
 
 
+def get_cond_for_empty(enable, jid_field: str, broadcast_field: str):
+    return f"AND (chat.sort_timestamp IS NOT NULL OR {jid_field}='status@broadcast' OR {broadcast_field}>0)" if enable else ""
+
+
 def get_chat_condition(filter, include, columns, jid=None, platform=None):
     if filter is not None:
         conditions = []
@@ -245,12 +249,6 @@ def get_chat_condition(filter, include, columns, jid=None, platform=None):
     else:
         return ""
 
-def _is_message_empty(message):
-    return (message.data is None or message.data == "") and not message.media
-
-def chat_is_empty(chat: ChatStore):
-    return len(chat.messages) == 0 or all(_is_message_empty(message) for message in chat.messages.values())
-
 
 # Android Specific
 CRYPT14_OFFSETS = (