[mob][photos] More refactor

mobile/lib/ui/viewer/people/person_cluster_suggestion.dart

@@ -19,6 +19,7 @@ import "package:photos/ui/components/models/button_type.dart";
 import "package:photos/ui/viewer/people/cluster_page.dart";
 import "package:photos/ui/viewer/people/person_clusters_page.dart";
 import "package:photos/ui/viewer/search/result/person_face_widget.dart";
+import "package:photos/utils/face/face_box_crop.dart";
 
 class SuggestionUserFeedback {
   final bool accepted;
@@ -358,7 +359,7 @@ class _PersonClustersState extends State<PersonReviewClusterSuggestion> {
         final clusterID = suggestion.clusterIDToMerge;
         for (final file in files.sublist(0, min(files.length, 8))) {
           unawaited(
-            PersonFaceWidget.precomputeNextFaceCrops(
+            precomputeNextFaceCrops(
               file,
               clusterID,
               useFullFile: false,
@@ -465,7 +466,7 @@ class _PersonClustersState extends State<PersonReviewClusterSuggestion> {
     final futures = <Future<Uint8List?>>[];
     for (final file in files) {
       futures.add(
-        PersonFaceWidget.precomputeNextFaceCrops(
+        precomputeNextFaceCrops(
           file,
           clusterID,
           useFullFile: false,

mobile/lib/ui/viewer/search/result/person_face_widget.dart

@@ -123,43 +123,4 @@ class PersonFaceWidget extends StatelessWidget {
     }
   }
 
-  static Future<Uint8List?> precomputeNextFaceCrops(
-    file,
-    clusterID, {
-    required bool useFullFile,
-  }) async {
-    try {
-      final Face? face = await MLDataDB.instance.getCoverFaceForPerson(
-        recentFileID: file.uploadedFileID!,
-        clusterID: clusterID,
-      );
-      if (face == null) {
-        debugPrint(
-          "No cover face for cluster $clusterID and recentFile ${file.uploadedFileID}",
-        );
-        return null;
-      }
-      EnteFile? fileForFaceCrop = file;
-      if (face.fileID != file.uploadedFileID!) {
-        fileForFaceCrop =
-            await FilesDB.instance.getAnyUploadedFile(face.fileID);
-      }
-      if (fileForFaceCrop == null) {
-        return null;
-      }
-      final cropMap = await getCachedFaceCrops(
-        fileForFaceCrop,
-        [face],
-        useFullFile: useFullFile,
-      );
-      return cropMap?[face.faceID];
-    } catch (e, s) {
-      log(
-        "Error getting cover face for cluster $clusterID",
-        error: e,
-        stackTrace: s,
-      );
-      return null;
-    }
-  }
 }

mobile/lib/utils/face/face_box_crop.dart

@@ -3,6 +3,8 @@ import "dart:io" show File;
 import "package:flutter/foundation.dart";
 import "package:logging/logging.dart";
 import "package:photos/core/cache/lru_map.dart";
+import "package:photos/db/files_db.dart";
+import "package:photos/db/ml/db.dart";
 import "package:photos/models/file/file.dart";
 import "package:photos/models/file/file_type.dart";
 import "package:photos/models/ml/face/box.dart";
@@ -126,6 +128,46 @@ Future<Map<String, Uint8List>?> getCachedFaceCrops(
   }
 }
 
+Future<Uint8List?> precomputeNextFaceCrops(
+    file,
+    clusterID, {
+    required bool useFullFile,
+  }) async {
+    try {
+      final Face? face = await MLDataDB.instance.getCoverFaceForPerson(
+        recentFileID: file.uploadedFileID!,
+        clusterID: clusterID,
+      );
+      if (face == null) {
+        debugPrint(
+          "No cover face for cluster $clusterID and recentFile ${file.uploadedFileID}",
+        );
+        return null;
+      }
+      EnteFile? fileForFaceCrop = file;
+      if (face.fileID != file.uploadedFileID!) {
+        fileForFaceCrop =
+            await FilesDB.instance.getAnyUploadedFile(face.fileID);
+      }
+      if (fileForFaceCrop == null) {
+        return null;
+      }
+      final cropMap = await getCachedFaceCrops(
+        fileForFaceCrop,
+        [face],
+        useFullFile: useFullFile,
+      );
+      return cropMap?[face.faceID];
+    } catch (e, s) {
+      _logger.severe(
+        "Error getting cover face for cluster $clusterID",
+        e,
+        s,
+      );
+      return null;
+    }
+  }
+
 Future<Map<String, Uint8List>?> _getFaceCrops(
   EnteFile file,
   Map<String, FaceBox> faceBoxeMap, {