Add new Logger to iOS SDK to be able to intercept logs and report them to the appropriate system
Bug: webrtc:8695
Change-Id: I4f81529222dcaf3dded1a0ab93fabf5cda1fdef8
Reviewed-on: https://webrtc-review.googlesource.com/37001
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Reviewed-by: Anders Carlsson <andersc@webrtc.org>
Commit-Queue: Kári Helgason <kthelgason@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21821}diff --git a/sdk/objc/Framework/Classes/Common/RTCCallbackLogger.mm b/sdk/objc/Framework/Classes/Common/RTCCallbackLogger.mm
new file mode 100644
index 0000000..0bfff73
--- /dev/null
+++ b/sdk/objc/Framework/Classes/Common/RTCCallbackLogger.mm
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2018 The WebRTC project authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#import "WebRTC/RTCCallbackLogger.h"
+
+#include <memory>
+
+#include "rtc_base/checks.h"
+#include "rtc_base/logging.h"
+#include "rtc_base/logsinks.h"
+
+class CallbackLogSink : public rtc::LogSink {
+ public:
+ CallbackLogSink(void (^callbackHandler)(NSString *message)) {
+ callback_handler_ = callbackHandler;
+ }
+
+ ~CallbackLogSink() override { callback_handler_ = nil; }
+
+ void OnLogMessage(const std::string &message) override {
+ if (callback_handler_) {
+ callback_handler_([NSString stringWithUTF8String:message.c_str()]);
+ }
+ }
+
+ private:
+ void (^callback_handler_)(NSString *message);
+};
+
+@implementation RTCCallbackLogger {
+ BOOL _hasStarted;
+ std::unique_ptr<CallbackLogSink> _logSink;
+}
+
+@synthesize severity = _severity;
+
+- (void)dealloc {
+ [self stop];
+}
+
+- (void)start:(nullable void (^)(NSString *))callback {
+ if (_hasStarted) {
+ return;
+ }
+
+ _logSink.reset(new CallbackLogSink(callback));
+
+ rtc::LogMessage::AddLogToStream(_logSink.get(), [self rtcSeverity]);
+ _hasStarted = YES;
+}
+
+- (void)stop {
+ if (!_hasStarted) {
+ return;
+ }
+ RTC_DCHECK(_logSink);
+ rtc::LogMessage::RemoveLogToStream(_logSink.get());
+ _hasStarted = NO;
+ _logSink.reset();
+}
+
+#pragma mark - Private
+
+- (rtc::LoggingSeverity)rtcSeverity {
+ switch (_severity) {
+ case RTCLoggingSeverityVerbose:
+ return rtc::LS_VERBOSE;
+ case RTCLoggingSeverityInfo:
+ return rtc::LS_INFO;
+ case RTCLoggingSeverityWarning:
+ return rtc::LS_WARNING;
+ case RTCLoggingSeverityError:
+ return rtc::LS_ERROR;
+ }
+}
+
+@end