Improve recognized license plate filter (#19491)

* Fetch all license plates outside of filter component

If the swr call took a long time, the entire select component may not display. This change moves the fetch to the parent component (like sub labels).

* add loading indicator

* improve query

frigate/api/app.py

@@ -20,7 +20,7 @@ from fastapi.encoders import jsonable_encoder
 from fastapi.params import Depends
 from fastapi.responses import JSONResponse, PlainTextResponse, StreamingResponse
 from markupsafe import escape
-from peewee import operator
+from peewee import SQL, operator
 from pydantic import ValidationError
 
 from frigate.api.auth import require_role
@@ -685,7 +685,14 @@ def plusModels(request: Request, filterByCurrentModelDetector: bool = False):
 @router.get("/recognized_license_plates")
 def get_recognized_license_plates(split_joined: Optional[int] = None):
     try:
-        events = Event.select(Event.data).distinct()
+        query = (
+            Event.select(
+                SQL("json_extract(data, '$.recognized_license_plate') AS plate")
+            )
+            .where(SQL("json_extract(data, '$.recognized_license_plate') IS NOT NULL"))
+            .distinct()
+        )
+        recognized_license_plates = [row[0] for row in query.tuples()]
     except Exception:
         return JSONResponse(
             content=(
@@ -694,14 +701,6 @@ def get_recognized_license_plates(split_joined: Optional[int] = None):
             status_code=404,
         )
 
-    recognized_license_plates = []
-    for e in events:
-        if e.data is not None and "recognized_license_plate" in e.data:
-            recognized_license_plates.append(e.data["recognized_license_plate"])
-
-    while None in recognized_license_plates:
-        recognized_license_plates.remove(None)
-
     if split_joined:
         original_recognized_license_plates = recognized_license_plates.copy()
         for recognized_license_plate in original_recognized_license_plates:

web/src/components/overlay/dialog/SearchFilterDialog.tsx

@@ -42,6 +42,7 @@ import {
   CommandList,
 } from "@/components/ui/command";
 import { LuCheck } from "react-icons/lu";
+import ActivityIndicator from "@/components/indicators/activity-indicator";
 
 type SearchFilterDialogProps = {
   config?: FrigateConfig;
@@ -64,6 +65,9 @@ export default function SearchFilterDialog({
   const { t } = useTranslation(["components/filter"]);
   const [currentFilter, setCurrentFilter] = useState(filter ?? {});
   const { data: allSubLabels } = useSWR(["sub_labels", { split_joined: 1 }]);
+  const { data: allRecognizedLicensePlates } = useSWR<string[]>(
+    "recognized_license_plates",
+  );
 
   useEffect(() => {
     if (filter) {
@@ -130,6 +134,7 @@ export default function SearchFilterDialog({
         }
       />
       <RecognizedLicensePlatesFilterContent
+        allRecognizedLicensePlates={allRecognizedLicensePlates}
         recognizedLicensePlates={currentFilter.recognized_license_plate}
         setRecognizedLicensePlates={(plate) =>
           setCurrentFilter({
@@ -875,6 +880,7 @@ export function SnapshotClipFilterContent({
 }
 
 type RecognizedLicensePlatesFilterContentProps = {
+  allRecognizedLicensePlates: string[] | undefined;
   recognizedLicensePlates: string[] | undefined;
   setRecognizedLicensePlates: (
     recognizedLicensePlates: string[] | undefined,
@@ -882,18 +888,12 @@ type RecognizedLicensePlatesFilterContentProps = {
 };
 
 export function RecognizedLicensePlatesFilterContent({
+  allRecognizedLicensePlates,
   recognizedLicensePlates,
   setRecognizedLicensePlates,
 }: RecognizedLicensePlatesFilterContentProps) {
   const { t } = useTranslation(["components/filter"]);
 
-  const { data: allRecognizedLicensePlates, error } = useSWR<string[]>(
-    "recognized_license_plates",
-    {
-      revalidateOnFocus: false,
-    },
-  );
-
   const [selectedRecognizedLicensePlates, setSelectedRecognizedLicensePlates] =
     useState<string[]>(recognizedLicensePlates || []);
   const [inputValue, setInputValue] = useState("");
@@ -923,7 +923,7 @@ export function RecognizedLicensePlatesFilterContent({
     }
   };
 
-  if (!allRecognizedLicensePlates || allRecognizedLicensePlates.length === 0) {
+  if (allRecognizedLicensePlates && allRecognizedLicensePlates.length === 0) {
     return null;
   }
 
@@ -947,15 +947,12 @@ export function RecognizedLicensePlatesFilterContent({
     <div className="overflow-x-hidden">
       <DropdownMenuSeparator className="mb-3" />
       <div className="mb-3 text-lg">{t("recognizedLicensePlates.title")}</div>
-      {error ? (
-        <p className="text-sm text-red-500">
-          {t("recognizedLicensePlates.loadFailed")}
-        </p>
-      ) : !allRecognizedLicensePlates ? (
-        <p className="text-sm text-muted-foreground">
-          {t("recognizedLicensePlates.loading")}
-        </p>
-      ) : (
+      {allRecognizedLicensePlates == undefined ? (
+        <div className="flex flex-col items-center justify-center text-sm text-muted-foreground">
+          <ActivityIndicator className="mb-3 mr-2 size-5" />
+          <p>{t("recognizedLicensePlates.loading")}</p>
+        </div>
+      ) : allRecognizedLicensePlates.length == 0 ? null : (
         <>
           <Command
             className="border border-input bg-background"
@@ -1010,11 +1007,11 @@ export function RecognizedLicensePlatesFilterContent({
               ))}
             </div>
           )}
-        </>
-      )}
           <p className="mt-1 text-sm text-muted-foreground">
             {t("recognizedLicensePlates.selectPlatesFromList")}
           </p>
+        </>
+      )}
     </div>
   );
 }