fix BUG-107: view / pagination gets out of whack

BUGs

@@ -1,7 +1,6 @@
-### Next: 107
+### Next: 108
 BUG-100: I managed to get 2 photos matching mich in the NOT_WORKING photo (probably dif refimgs but same p.tag?)
 BUG-105: show unmatched needs to handle overrides (ignore face, etc.)
 BUG-106: cant add trudy /pat? as refimgs via FaceDBox
     - seems the cropped trudy face is not sufficient to find a face, how odd...
       (it came from a face bbox, BUT, I have grown the face seln by 10%?)
-BUG-107: view / pagination gets out of whack - suss its paging in, then a new scan resets file/ordering (offset most likely?)

pa_job_manager.py

@@ -982,9 +982,9 @@ def DisconnectSingleNoMatchOverride( job, o ):
         session.add( DisconnectedNoMatchOverride( face=f.face, type_id=o.type_id ) )
 
     # now deal with 'renaming' the metadata on FS
-    p=f'{SettingsMPath()}/no_match_overrides/'
+    mpath=f'{SettingsMPath()}/no_match_overrides/'
-    fname=f'{p}{o.face_id}_{ot.name}'
+    fname=f'{mpath}{o.face_id}_{ot.name}'
-    new_fname=f'{p}0_{ot.name}_{uuid.uuid4()}'
+    new_fname=f'{mpath}0_{ot.name}_{uuid.uuid4()}'
     try:
         if os.path.exists( fname ):
             os.replace( fname, new_fname )
@@ -1581,6 +1581,18 @@ def find_last_successful_ai_scan(job):
         return j.last_update.timestamp()
     return 0
 
+####################################################################################################################################
+# when an import job actually finds new files, then the pa_user_state caches will become invalid (offsets are now wrong) 
+####################################################################################################################################
+def DeleteOldPA_UserState(job):
+# clear them out for now - this is 'dumb', just delete ALL. Eventually, can do this based on just the path &/or whether the last_used is
+# newer than this delete moment (only would be a race condition between an import changing things and someone simultaneously viewing)
+#    path=[jex.value for jex in job.extra if jex.name == "path"][0]
+    session.query(PA_UserState).delete()
+    return
+
+
+
 ####################################################################################################################################
 # JobImportDir(): job that scan import dir and processes entries in there - key function that uses os.walk() to traverse the 
 # file system and calls AddFile()/AddDir() as necessary
@@ -1689,6 +1701,8 @@ def JobImportDir(job):
     if found_new_files:
         job.extra.append( JobExtra( name="new_files", value=found_new_files ) )
         session.add(job)
+        # this will invalidate pa_user_state for this path's contents (offsets are now wrong), clear them out
+        DeleteOldPA_UserState(job)
 
     rm_cnt=HandleAnyFSDeletions(job)
 
@@ -2206,8 +2220,8 @@ def ReloadMetadata(job):
     AddLogForJob(job, f"INFO: Loading/Retrieving any Metatdata...")
 
     # no path, then no metadata (probably first ever run)
-    p = SettingsMPath()
+    mpath = SettingsMPath()
-    if not p:
+    if not mpath:
         FinishJob( job, "No metadata path - skipping" )
         return False
 
@@ -2215,7 +2229,7 @@ def ReloadMetadata(job):
     CopyOverrides()
 
     # process Metadata on FS for no_match_overrides (disco ones, will have 0 as face_id)
-    fnames = glob.glob( f'{p}/no_match_overrides/*' )
+    fnames = glob.glob( f'{mpath}/no_match_overrides/*' )
     for fname in fnames:
         # type derived from fname (e.g. 0_Too Young_uuid*, 1_Too Young, 2_Ingore Face, etc.)
         match=re.search( '(\d+)_([^_\.]+)', fname )
@@ -2234,12 +2248,12 @@ def ReloadMetadata(job):
             session.add( DisconnectedNoMatchOverride( face=face_data, type_id=otype.id ) )
             if face_id:
                 try:
-                    os.replace( fname, f'{p}no_match_overrides/0_{otype.name}_{uuid.uuid4()}' )
+                    os.replace( fname, f'{mpath}no_match_overrides/0_{otype.name}_{uuid.uuid4()}' )
                 except Exception as ex:
                     print( f"ERROR: renaming no-match metadata on filesystem failed: {ex}" )
 
     # process Metadata on FS for force_match_overrides (disco ones, will have 0 as face_id)
-    fnames = glob.glob( f'{p}force_match_overrides/*' )
+    fnames = glob.glob( f'{mpath}force_match_overrides/*' )
     for fname in fnames:
         # person derived from fname (e.g. 0_ddp_uuid*, 1_ddp, 2_mich, etc.)
         match=re.search( '(\d+)_([^_]+)', fname )
@@ -2262,7 +2276,7 @@ def ReloadMetadata(job):
             # if face>0, then we need to move the FS copy to a disco
             if face_id:
                 try:
-                    os.replace( fname, f'{p}force_match_overrides/0_{p.tag}_{uuid.uuid4()}' )
+                    os.replace( fname, f'{mpath}force_match_overrides/0_{p.tag}_{uuid.uuid4()}' )
                 except Exception as ex:
                     print( f"ERROR: renaming force-match metadata on filesystem failed: {ex}" )