refactored code; added watermark and nsfw facilities to app config route

invokeai/app/api/routers/app_info.py

@@ -1,9 +1,15 @@
+import typing
 from enum import Enum
 from fastapi import Body
 from fastapi.routing import APIRouter
+from pathlib import Path
 from pydantic import BaseModel, Field
 
 from invokeai.backend.image_util.patchmatch import PatchMatch
+from invokeai.backend.image_util.safety_checker import SafetyChecker
+from invokeai.backend.image_util.invisible_watermark import InvisibleWatermark
+from invokeai.app.invocations.upscale import ESRGAN_MODELS
+
 from invokeai.version import __version__
 
 from ..dependencies import ApiDependencies
@@ -30,6 +36,10 @@ class AppConfig(BaseModel):
     """App Config Response"""
 
     infill_methods: list[str] = Field(description="List of available infill methods")
+    upscaling_methods: list[str] = Field(description="List of upscaling methods")
+    upscaling_models: list[str] = Field(description="List of postprocessing methods")
+    nsfw_methods: list[str] = Field(description="List of NSFW checking methods")
+    watermarking_methods: list[str] = Field(description="List of invisible watermark methods")
 
 
 @app_router.get(
@@ -46,7 +56,27 @@ async def get_config() -> AppConfig:
     infill_methods = ['tile']
     if PatchMatch.patchmatch_available():
         infill_methods.append('patchmatch')
-    return AppConfig(infill_methods=infill_methods)
+        
+    upscaling_methods = ['esrgan']
+    upscaling_models = []
+    for model in typing.get_args(ESRGAN_MODELS):
+        upscaling_models.append(str(Path(model).stem))
+
+    nsfw_methods = []
+    if SafetyChecker.safety_checker_available():
+        nsfw_methods.append('nsfw_checker')
+
+    watermarking_methods = []
+    if InvisibleWatermark.invisible_watermark_available():
+        watermarking_methods.append('invisible_watermark')
+        
+    return AppConfig(
+        infill_methods=infill_methods,
+        upscaling_methods=upscaling_methods,
+        upscaling_models=upscaling_models,
+        nsfw_methods=nsfw_methods,
+        watermarking_methods=watermarking_methods,
+    )
 
 @app_router.get(
     "/logging",