Classification fixes (#20771)

* Fully delete a model

* Fix deletion dialog

* Fix classification back step

* Adjust selection gradient

* Fix

* Fix

frigate/api/classification.py

@@ -31,13 +31,15 @@ from frigate.api.defs.response.generic_response import GenericResponse
 from frigate.api.defs.tags import Tags
 from frigate.config import FrigateConfig
 from frigate.config.camera import DetectConfig
-from frigate.const import CLIPS_DIR, FACE_DIR
+from frigate.const import CLIPS_DIR, FACE_DIR, MODEL_CACHE_DIR
 from frigate.embeddings import EmbeddingsContext
 from frigate.models import Event
+from frigate.util.builtin import update_yaml_file_bulk
 from frigate.util.classification import (
     collect_object_classification_examples,
     collect_state_classification_examples,
 )
+from frigate.util.config import find_config_file
 from frigate.util.path import get_event_snapshot
 
 logger = logging.getLogger(__name__)
@@ -828,12 +830,34 @@ def delete_classification_model(request: Request, name: str):
             status_code=404,
         )
 
-    # Delete the classification model's data directory
+    # Delete the classification model's data directory in clips
-    model_dir = os.path.join(CLIPS_DIR, sanitize_filename(name))
+    data_dir = os.path.join(CLIPS_DIR, sanitize_filename(name))
+    if os.path.exists(data_dir):
+        shutil.rmtree(data_dir)
 
+    # Delete the classification model's files in model_cache
+    model_dir = os.path.join(MODEL_CACHE_DIR, sanitize_filename(name))
     if os.path.exists(model_dir):
         shutil.rmtree(model_dir)
 
+    # Remove the model from the config file
+    config_file = find_config_file()
+    try:
+        # Setting value to empty string deletes the key
+        updates = {f"classification.custom.{name}": None}
+        update_yaml_file_bulk(config_file, updates)
+    except Exception as e:
+        logger.error(f"Error updating config file: {e}")
+        return JSONResponse(
+            content=(
+                {
+                    "success": False,
+                    "message": "Failed to update config file.",
+                }
+            ),
+            status_code=500,
+        )
+
     return JSONResponse(
         content=(
             {

web/src/components/classification/wizard/Step3ChooseExamples.tsx

@@ -317,6 +317,21 @@ export default function Step3ChooseExamples({
     return unclassifiedImages.length === 0;
   }, [unclassifiedImages]);
 
+  const handleBack = useCallback(() => {
+    if (currentClassIndex > 0) {
+      const previousClass = allClasses[currentClassIndex - 1];
+      setCurrentClassIndex((prev) => prev - 1);
+
+      // Restore selections for the previous class
+      const previousSelections = Object.entries(imageClassifications)
+        .filter(([_, className]) => className === previousClass)
+        .map(([imageName, _]) => imageName);
+      setSelectedImages(new Set(previousSelections));
+    } else {
+      onBack();
+    }
+  }, [currentClassIndex, allClasses, imageClassifications, onBack]);
+
   return (
     <div className="flex flex-col gap-6">
       {isTraining ? (
@@ -420,7 +435,7 @@ export default function Step3ChooseExamples({
 
       {!isTraining && (
         <div className="flex flex-col gap-3 pt-3 sm:flex-row sm:justify-end sm:gap-4">
-          <Button type="button" onClick={onBack} className="sm:flex-1">
+          <Button type="button" onClick={handleBack} className="sm:flex-1">
             {t("button.back", { ns: "common" })}
           </Button>
           <Button

web/src/views/classification/ModelSelectionView.tsx

@@ -10,7 +10,7 @@ import {
   CustomClassificationModelConfig,
   FrigateConfig,
 } from "@/types/frigateConfig";
-import { useCallback, useEffect, useMemo, useRef, useState } from "react";
+import { useCallback, useEffect, useMemo, useState } from "react";
 import { useTranslation } from "react-i18next";
 import { FaFolderPlus } from "react-icons/fa";
 import { MdModelTraining } from "react-icons/md";
@@ -21,7 +21,6 @@ import Heading from "@/components/ui/heading";
 import { useOverlayState } from "@/hooks/use-overlay-state";
 import axios from "axios";
 import { toast } from "sonner";
-import useKeyboardListener from "@/hooks/use-keyboard-listener";
 import {
   DropdownMenu,
   DropdownMenuContent,
@@ -212,12 +211,6 @@ function ModelCard({ config, onClick, onDelete }: ModelCardProps) {
   }>(`classification/${config.name}/dataset`, { revalidateOnFocus: false });
 
   const [deleteDialogOpen, setDeleteDialogOpen] = useState(false);
-  const bypassDialogRef = useRef(false);
-
-  useKeyboardListener(["Shift"], (_, modifiers) => {
-    bypassDialogRef.current = modifiers.shift;
-    return false;
-  });
 
   const handleDelete = useCallback(async () => {
     await axios
@@ -241,13 +234,10 @@ function ModelCard({ config, onClick, onDelete }: ModelCardProps) {
       });
   }, [config, onDelete, t]);
 
-  const handleDeleteClick = useCallback(() => {
+  const handleDeleteClick = useCallback((e: React.MouseEvent) => {
-    if (bypassDialogRef.current) {
+    e.stopPropagation();
-      handleDelete();
-    } else {
     setDeleteDialogOpen(true);
-    }
+  }, []);
-  }, [handleDelete]);
 
   const coverImage = useMemo(() => {
     if (!dataset) {
@@ -304,7 +294,7 @@ function ModelCard({ config, onClick, onDelete }: ModelCardProps) {
           className="size-full"
           src={`${baseUrl}clips/${config.name}/dataset/${coverImage?.name}/${coverImage?.img}`}
         />
-        <ImageShadowOverlay />
+        <ImageShadowOverlay lowerClassName="h-[30%] z-0" />
         <div className="absolute bottom-2 left-3 text-lg text-white smart-capitalize">
           {config.name}
         </div>
@@ -315,14 +305,13 @@ function ModelCard({ config, onClick, onDelete }: ModelCardProps) {
                 <FiMoreVertical className="size-5 text-white" />
               </BlurredIconButton>
             </DropdownMenuTrigger>
-            <DropdownMenuContent align="end">
+            <DropdownMenuContent
+              align="end"
+              onClick={(e) => e.stopPropagation()}
+            >
               <DropdownMenuItem onClick={handleDeleteClick}>
                 <LuTrash2 className="mr-2 size-4" />
-                <span>
+                <span>{t("button.delete", { ns: "common" })}</span>
-                  {bypassDialogRef.current
-                    ? t("button.deleteNow", { ns: "common" })
-                    : t("button.delete", { ns: "common" })}
-                </span>
               </DropdownMenuItem>
             </DropdownMenuContent>
           </DropdownMenu>