Tree: Use unwrap and coalesce for optional handling

Python doesn't have proper handling of optionals. The only way to
handle them is checking via an if statement if the value is None or
by using the "or" keyword to unwrap optionals.

Previously, I used the "or" method to unwrap, but this caused issues
due to falsy values falling back to the default. This is especially
the case with booleans were "False" changed to "True".

Instead, add two new functions: unwrap and coalesce. Both function
to properly implement a functional way of "None" coalescing.

Signed-off-by: kingbri <bdashore3@proton.me>

OAI/utils.py

@@ -12,6 +12,7 @@ from OAI.types.lora import LoraList, LoraCard
 from OAI.types.model import ModelList, ModelCard
 from packaging import version
 from typing import Optional, List, Dict
+from utils import unwrap
 
 # Check fastchat
 try:
@@ -30,7 +31,7 @@ def create_completion_response(text: str, prompt_tokens: int, completion_tokens:
 
     response = CompletionResponse(
         choices = [choice],
-        model = model_name or "",
+        model = unwrap(model_name, ""),
         usage = UsageStats(prompt_tokens = prompt_tokens,
                            completion_tokens = completion_tokens,
                            total_tokens = prompt_tokens + completion_tokens)
@@ -51,7 +52,7 @@ def create_chat_completion_response(text: str, prompt_tokens: int, completion_to
 
     response = ChatCompletionResponse(
         choices = [choice],
-        model = model_name or "",
+        model = unwrap(model_name, ""),
         usage = UsageStats(prompt_tokens = prompt_tokens,
                            completion_tokens = completion_tokens,
                            total_tokens = prompt_tokens + completion_tokens)
@@ -80,7 +81,7 @@ def create_chat_completion_stream_chunk(const_id: str,
     chunk = ChatCompletionStreamChunk(
         id = const_id,
         choices = [choice],
-        model = model_name or ""
+        model = unwrap(model_name, "")
     )
 
     return chunk