From a0220de2338e4fbc308c95d9fef91383dd817ca4 Mon Sep 17 00:00:00 2001
From: Prianka Liz Kariat <prianka.kariat@ymedialabs.com>
Date: Wed, 11 Jan 2023 20:22:20 +0530
Subject: [PATCH] Added iOS text classifier result helpers

---
 .../ios/text/text_classifier/utils/BUILD      | 10 +++++
 .../sources/MPPTextClassifierResult+Helpers.h | 28 ++++++++++++
 .../MPPTextClassifierResult+Helpers.mm        | 43 +++++++++++++++++++
 3 files changed, 81 insertions(+)
 create mode 100644 mediapipe/tasks/ios/text/text_classifier/utils/sources/MPPTextClassifierResult+Helpers.h
 create mode 100644 mediapipe/tasks/ios/text/text_classifier/utils/sources/MPPTextClassifierResult+Helpers.mm

diff --git a/mediapipe/tasks/ios/text/text_classifier/utils/BUILD b/mediapipe/tasks/ios/text/text_classifier/utils/BUILD
index 9b01c763..299050b3 100644
--- a/mediapipe/tasks/ios/text/text_classifier/utils/BUILD
+++ b/mediapipe/tasks/ios/text/text_classifier/utils/BUILD
@@ -29,3 +29,13 @@ objc_library(
     ],
 )
 
+objc_library(
+    name = "MPPTextClassifierResultHelpers",
+    srcs = ["sources/MPPTextClassifierResult+Helpers.mm"],
+    hdrs = ["sources/MPPTextClassifierResult+Helpers.h"],
+    deps = [
+        "//mediapipe/tasks/ios/text/text_classifier:MPPTextClassifierResult",
+        "//mediapipe/tasks/ios/components/containers/utils:MPPClassificationResultHelpers",
+        "//mediapipe/framework:packet",
+    ],
+)
diff --git a/mediapipe/tasks/ios/text/text_classifier/utils/sources/MPPTextClassifierResult+Helpers.h b/mediapipe/tasks/ios/text/text_classifier/utils/sources/MPPTextClassifierResult+Helpers.h
new file mode 100644
index 00000000..f1b728b0
--- /dev/null
+++ b/mediapipe/tasks/ios/text/text_classifier/utils/sources/MPPTextClassifierResult+Helpers.h
@@ -0,0 +1,28 @@
+// Copyright 2023 The MediaPipe Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "mediapipe/tasks/ios/text/text_classifier/sources/MPPTextClassifierResult.h"
+
+#include "mediapipe/framework/packet.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface MPPTextClassifierResult (Helpers)
+
++ (MPPTextClassifierResult *)textClassifierResultWithClassificationsPacket:
+    (const mediapipe::Packet &)packet;
+
+@end
+
+NS_ASSUME_NONNULL_END
diff --git a/mediapipe/tasks/ios/text/text_classifier/utils/sources/MPPTextClassifierResult+Helpers.mm b/mediapipe/tasks/ios/text/text_classifier/utils/sources/MPPTextClassifierResult+Helpers.mm
new file mode 100644
index 00000000..62e0d8cb
--- /dev/null
+++ b/mediapipe/tasks/ios/text/text_classifier/utils/sources/MPPTextClassifierResult+Helpers.mm
@@ -0,0 +1,43 @@
+// Copyright 2023 The MediaPipe Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#import "mediapipe/tasks/ios/text/text_classifier/utils/sources/MPPTextClassifierResult+Helpers.h"
+
+#import "mediapipe/tasks/ios/components/containers/utils/sources/MPPClassificationResult+Helpers.h"
+
+#include "mediapipe/tasks/cc/components/containers/proto/classifications.pb.h"
+
+static const int kMicroSecondsPerMilliSecond = 1000;
+
+namespace {
+using ClassificationResultProto =
+    ::mediapipe::tasks::components::containers::proto::ClassificationResult;
+using ::mediapipe::Packet;
+}  // namespace
+
+#define int kMicroSecondsPerMilliSecond = 1000;
+
+@implementation MPPTextClassifierResult (Helpers)
+
++ (MPPTextClassifierResult *)textClassifierResultWithClassificationsPacket:(const Packet &)packet {
+  MPPClassificationResult *classificationResult = [MPPClassificationResult
+      classificationResultWithProto:packet.Get<ClassificationResultProto>()];
+
+  return [[MPPTextClassifierResult alloc]
+      initWithClassificationResult:classificationResult
+                       timestampMs:(NSInteger)(packet.Timestamp().Value() /
+                                               kMicroSecondsPerMilliSecond)];
+}
+
+@end