🎨 Work on import error handling

- Generic ErrorProducer class
- Importer and managers are error producers
- SGDB Auth friendly error
- Bad source location friendly errors (data, config, cache)
- Removed unused decorators

src/importer/sources/source.py

@@ -20,10 +20,11 @@
 import sys
 from abc import abstractmethod
 from collections.abc import Iterable, Iterator
-from typing import Generator, Any, Optional
+from typing import Any, Generator, Optional
 
-from src.importer.sources.location import Location
+from src.errors.friendly_error import FriendlyError
 from src.game import Game
+from src.importer.sources.location import Location, UnresolvableLocationError
 
 # Type of the data returned by iterating on a Source
 SourceIterationResult = None | Game | tuple[Game, tuple[Any]]
@@ -100,9 +101,20 @@ class Source(Iterable):
 
     def __iter__(self) -> SourceIterator:
         """Get an iterator for the source"""
-        for location in (self.data_location, self.cache_location, self.config_location):
-            if location is not None:
+        for location_name in ("data", "cache", "config"):
+            location = getattr(self, f"{location_name}_location", None)
+            if location is None:
+                continue
+            try:
                 location.resolve()
+            except UnresolvableLocationError as error:
+                raise FriendlyError(
+                    # The variable is the source's name
+                    f"Invalid {location_name} location for {{}}",
+                    "Change it or disable the source in the preferences",
+                    (self.name,),
+                    (self.name,),
+                ) from error
         return self.iterator_class(self)