API: Add sampler override switching

Allow users to switch the currently overriden samplers via the API
so a restart isn't required to switch the overrides.

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

common/sampling.py

@@ -166,6 +166,10 @@ class SamplerParams(BaseModel):
 DEFAULT_OVERRIDES = {}
 
 
+def get_sampler_overrides():
+    return DEFAULT_OVERRIDES
+
+
 def set_overrides_from_dict(new_overrides: dict):
     """Wrapper function to update sampler overrides"""
 
@@ -174,10 +178,10 @@ def set_overrides_from_dict(new_overrides: dict):
     if isinstance(new_overrides, dict):
         DEFAULT_OVERRIDES = new_overrides
     else:
-        raise TypeError("new sampler overrides must be a dict!")
+        raise TypeError("New sampler overrides must be a dict!")
 
 
-def get_overrides_from_file(preset_name: str):
+def set_overrides_from_file(preset_name: str):
     """Fetches an override preset from a file"""
 
     preset_path = pathlib.Path(f"sampler_overrides/{preset_name}.yml")
@@ -188,11 +192,13 @@ def get_overrides_from_file(preset_name: str):
 
             logger.info("Applied sampler overrides from file.")
     else:
-        logger.warn(
-            f"Sampler override file named \"{preset_name}\" was not found. "
+        error_message = (
+            f'Sampler override file named "{preset_name}" was not found. '
             + "Make sure it's located in the sampler_overrides folder."
         )
 
+        raise FileNotFoundError(error_message)
+
 
 # TODO: Maybe move these into the class
 # Classmethods aren't recognized in pydantic default_factories