Back up temporary UserDatabase used for testing (delete when merging PR)

Author: milkdromeda

src/main/java/temp_persistence/UserDatabase.java

@@ -0,0 +1,51 @@
+package temp_persistence;
+
+import java.io.*;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+
+import conversation_history_use_case.ConvHistDsRequestModel;
+import conversation_history_use_case.MsgSenderDsRequestModel;
+import entities.*;
+
+//public class temp_persistence.UserDatabase implements UserExists, UserCreator{
+public class UserDatabase{  // this needs to extend an interface
+    Map<String, User> temp_accounts;
+    File accounts;
+    public UserDatabase(File accounts){
+        this.accounts = accounts;
+        this.temp_accounts = new HashMap<String, User>();
+        // Can have code to populate temp_accounts
+    }
+
+    /**
+     * Pushes a new message to a chat's conversation history (in memory not persisting storage)
+     * @param dsRequestModel input data containing user ID, chat ID, message content
+     */
+    public void saveMessage(MsgSenderDsRequestModel dsRequestModel) {
+        String userID = dsRequestModel.getUserID();
+        String chatID = dsRequestModel.getChatID();
+        Message message = dsRequestModel.getMessage();
+
+        // Find chat under specified User
+        Chat chat = temp_accounts.get(userID).getChats().get(chatID);
+
+        chat.addMessage(message);
+    }
+
+    /**
+     * Gets a chat's conversation history (from memory not persisting storage)
+     * @param dsRequestModel input data containing user ID, chat ID
+     * @return a chat's conversation history
+     */
+    public ArrayList<Message> getConversationHistory(ConvHistDsRequestModel dsRequestModel) {
+        String userID = dsRequestModel.getUserID();
+        String chatID = dsRequestModel.getChatID();
+
+        // Find chat under specified User
+        Chat chat = temp_accounts.get(userID).getChats().get(chatID);
+
+        return Chat.getConversationHistory();
+    }
+}