assign roles when single input and consolidate validation

frigate/config.py

@@ -504,6 +504,10 @@ class CameraConfig(FrigateBaseModel):
                 for idx, (name, z) in enumerate(config["zones"].items())
             }
 
+        # add roles to the input if there is only one
+        if len(config["ffmpeg"]["inputs"]) == 1:
+            config["ffmpeg"]["inputs"][0]["roles"] = ["record", "rtmp", "detect"]
+
         super().__init__(**config)
 
     @property
@@ -798,6 +802,23 @@ class FrigateConfig(FrigateBaseModel):
                 raise ValueError("Zones cannot share names with cameras")
         return v
 
+    @validator("cameras")
+    def ensure_cameras_are_not_missing_roles(cls, v: Dict[str, CameraConfig]):
+        for name, camera in v.items():
+            assigned_roles = list(
+                set([r for i in camera.ffmpeg.inputs for r in i.roles])
+            )
+            if camera.record.enabled and not "record" in assigned_roles:
+                raise ValueError(
+                    f"Camera {name} has record enabled, but record is not assigned to an input."
+                )
+
+            if camera.rtmp.enabled and not "rtmp" in assigned_roles:
+                raise ValueError(
+                    f"Camera {name} has rtmp enabled, but rtmp is not assigned to an input."
+                )
+        return v
+
     @classmethod
     def parse_file(cls, config_file):
         with open(config_file) as f: