Added iOS language detector options helpers

mediapipe/tasks/ios/text/language_detector/utils/BUILD

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+# 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.
+
+package(default_visibility = ["//mediapipe/tasks:internal"])
+
+licenses(["notice"])
+
+objc_library(
+    name = "MPPLanguageDetectorOptionsHelpers",
+    srcs = ["sources/MPPLanguageDetectorOptions+Helpers.mm"],
+    hdrs = ["sources/MPPLanguageDetectorOptions+Helpers.h"],
+    deps = [
+        "//mediapipe/framework:calculator_options_cc_proto",
+        "//mediapipe/tasks/cc/components/processors/proto:classifier_options_cc_proto",
+        "//mediapipe/tasks/cc/text/text_classifier/proto:text_classifier_graph_options_cc_proto",
+        "//mediapipe/tasks/ios/common/utils:NSStringHelpers",
+        "//mediapipe/tasks/ios/core:MPPTaskOptionsProtocol",
+        "//mediapipe/tasks/ios/core/utils:MPPBaseOptionsHelpers",
+        "//mediapipe/tasks/ios/text/language_detector:MPPLanguageDetectorOptions",
+    ],
+)

mediapipe/tasks/ios/text/language_detector/utils/sources/MPPLanguageDetectorOptions+Helpers.h

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+// 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.
+
+#include "mediapipe/framework/calculator_options.pb.h"
+#import "mediapipe/tasks/ios/core/sources/MPPTaskOptionsProtocol.h"
+#import "mediapipe/tasks/ios/text/language_detector/sources/MPPLanguageDetectorOptions.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface MPPLanguageDetectorOptions (Helpers) <MPPTaskOptionsProtocol>
+
+- (void)copyToProto:(::mediapipe::CalculatorOptions *)optionsProto;
+
+@end
+
+NS_ASSUME_NONNULL_END

mediapipe/tasks/ios/text/language_detector/utils/sources/MPPLanguageDetectorOptions+Helpers.mm

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+// 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/language_detector/utils/sources/MPPLanguageDetectorOptions+Helpers.h"
+
+#import "mediapipe/tasks/ios/common/utils/sources/NSString+Helpers.h"
+#import "mediapipe/tasks/ios/core/utils/sources/MPPBaseOptions+Helpers.h"
+
+#include "mediapipe/tasks/cc/components/processors/proto/classifier_options.pb.h"
+#include "mediapipe/tasks/cc/text/text_classifier/proto/text_classifier_graph_options.pb.h"
+
+namespace {
+using CalculatorOptionsProto = ::mediapipe::CalculatorOptions;
+using TextClassifierGraphOptionsProto =
+    ::mediapipe::tasks::text::text_classifier::proto::TextClassifierGraphOptions;
+using ClassifierOptionsProto = ::mediapipe::tasks::components::processors::proto::ClassifierOptions;
+}  // namespace
+
+@implementation MPPLanguageDetectorOptions (Helpers)
+
+- (void)copyToProto:(CalculatorOptionsProto *)optionsProto {
+  TextClassifierGraphOptionsProto *graphOptions =
+      optionsProto->MutableExtension(TextClassifierGraphOptionsProto::ext);
+  [self.baseOptions copyToProto:graphOptions->mutable_base_options()];
+
+  ClassifierOptionsProto *classifierOptionsProto = graphOptions->mutable_classifier_options();
+  classifierOptionsProto->Clear();
+
+  if (self.displayNamesLocale) {
+    classifierOptionsProto->set_display_names_locale(self.displayNamesLocale.cppString);
+  }
+
+  classifierOptionsProto->set_max_results((int)self.maxResults);
+  classifierOptionsProto->set_score_threshold(self.scoreThreshold);
+
+  for (NSString *category in self.categoryAllowlist) {
+    classifierOptionsProto->add_category_allowlist(category.cppString);
+  }
+
+  for (NSString *category in self.categoryDenylist) {
+    classifierOptionsProto->add_category_denylist(category.cppString);
+  }
+}
+
+@end