fix PIL deprecation and cleanup PIL code

see https://pillow.readthedocs.io/en/stable/deprecations.html

src/Products/PlonePAS/config.py

@@ -1,3 +1,6 @@
+from PIL import Image
+
+
 PROJECTNAME = "PlonePAS"
 GLOBALS = globals()
 
@@ -9,15 +12,8 @@
 }
 
 # Settings for member image resize quality
-HAS_PIL = True
-try:
-    from PIL import Image
-
-    PIL_SCALING_ALGO = Image.ANTIALIAS
-except ImportError:
-    PIL_SCALING_ALGO = None
-    HAS_PIL = False
-
+HAS_PIL = True  # remove in Version 8
+PIL_SCALING_ALGO = Image.Resampling.LANCZOS
 PIL_QUALITY = 88
 MEMBER_IMAGE_SCALE = (75, 100)
 IMAGE_SCALE_PARAMS = {

src/Products/PlonePAS/tools/membership.py

@@ -22,7 +22,6 @@
 from Products.CMFCore.permissions import View
 from Products.CMFCore.utils import _checkPermission
 from Products.CMFCore.utils import getToolByName
-from Products.PlonePAS.config import HAS_PIL
 from Products.PlonePAS.events import UserInitialLoginInEvent
 from Products.PlonePAS.events import UserLoggedInEvent
 from Products.PlonePAS.events import UserLoggedOutEvent
@@ -38,6 +37,7 @@
 from zope.interface import implementer
 
 import logging
+import PIL
 import transaction
 
 
@@ -764,14 +764,7 @@ def getBadMembers(self):
             portrait_data = portrait.data
             if not portrait_data:
                 continue
-            if not HAS_PIL:
-                raise RuntimeError(
-                    "No Python Imaging Libraries (PIL) found. "
-                    "Unable to validate profile image. "
-                )
             try:
-                import PIL
-
                 PIL.Image.open(BytesIO(portrait_data))
             except ConflictError:
                 pass