Repsond to CR w/ @cmchen.

* Added docs
* added asserts to TSEnv accessors

// FREEBIE

src/Messages/OWSCallAnswerMessage.h

@@ -1,10 +1,14 @@
-//  Created by Michael Kirk on 12/1/16.
-//  Copyright © 2016 Open Whisper Systems. All rights reserved.
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
 
 NS_ASSUME_NONNULL_BEGIN
 
 @class OWSSignalServiceProtosCallMessageAnswer;
 
+/**
+ * Sent by the call recipient upon accepting a CallOffer
+ */
 @interface OWSCallAnswerMessage : NSObject
 
 - (instancetype)initWithCallId:(UInt64)callId sessionDescription:(NSString *)sessionDescription;

src/Messages/OWSCallBusyMessage.h

@@ -1,5 +1,6 @@
-//  Created by Michael Kirk on 12/1/16.
-//  Copyright © 2016 Open Whisper Systems. All rights reserved.
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
 
 #import "OWSOutgoingCallMessage.h"
 
@@ -7,6 +8,9 @@ NS_ASSUME_NONNULL_BEGIN
 
 @class OWSSignalServiceProtosCallMessageBusy;
 
+/**
+ * Sent by the call recipient after receiving a call offer when they are already in a call.
+ */
 @interface OWSCallBusyMessage : OWSOutgoingCallMessage
 
 - (instancetype)initWithCallId:(UInt64)callId;

src/Messages/OWSCallBusyMessage.m

@@ -1,5 +1,6 @@
-//  Created by Michael Kirk on 12/1/16.
-//  Copyright © 2016 Open Whisper Systems. All rights reserved.
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
 
 #import "OWSCallBusyMessage.h"
 #import "OWSSignalServiceProtos.pb.h"
@@ -29,7 +30,6 @@ NS_ASSUME_NONNULL_BEGIN
     return [builder build];
 }
 
-
 @end
 
 NS_ASSUME_NONNULL_END

src/Messages/OWSCallHangupMessage.h

@@ -1,5 +1,6 @@
-//  Created by Michael Kirk on 12/8/16.
-//  Copyright © 2016 Open Whisper Systems. All rights reserved.
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
 
 #import "OWSOutgoingCallMessage.h"
 
@@ -7,6 +8,9 @@ NS_ASSUME_NONNULL_BEGIN
 
 @class OWSSignalServiceProtosCallMessageHangup;
 
+/**
+ * Sent by either party in a call to indicate the user intentionally ended the call.
+ */
 @interface OWSCallHangupMessage : OWSOutgoingCallMessage
 
 - (instancetype)initWithCallId:(UInt64)callId;

src/Messages/OWSCallIceUpdateMessage.h

@@ -1,10 +1,16 @@
-//  Created by Michael Kirk on 12/6/16.
-//  Copyright © 2016 Open Whisper Systems. All rights reserved.
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
 
 NS_ASSUME_NONNULL_BEGIN
 
 @class OWSSignalServiceProtosCallMessageIceUpdate;
 
+/**
+ * Sent by both parties out of band of the RTC calling channels, as part of setting up those channels. The messages
+ * include network accessability information from the perspective of each client. Once compatible ICEUpdates have been
+ * exchanged, the clients can connect directly.
+ */
 @interface OWSCallIceUpdateMessage : NSObject
 
 - (instancetype)initWithCallId:(UInt64)callId

src/Messages/OWSCallOfferMessage.h

@@ -1,10 +1,14 @@
-//  Created by Michael Kirk on 12/1/16.
-//  Copyright © 2016 Open Whisper Systems. All rights reserved.
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
 
 NS_ASSUME_NONNULL_BEGIN
 
 @class OWSSignalServiceProtosCallMessageOffer;
 
+/**
+ * Sent by the call initiator to Signal their intention to set up a call with the recipient.
+ */
 @interface OWSCallOfferMessage : NSObject
 
 - (instancetype)initWithCallId:(UInt64)callId sessionDescription:(NSString *)sessionDescription;

src/Messages/OWSOutgoingCallMessage.h

@@ -1,5 +1,6 @@
-//  Created by Michael Kirk on 12/1/16.
-//  Copyright © 2016 Open Whisper Systems. All rights reserved.
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
 
 #import "TSOutgoingMessage.h"
 
@@ -13,6 +14,9 @@ NS_ASSUME_NONNULL_BEGIN
 
 @class TSThread;
 
+/**
+ * WebRTC call signaling sent out of band, via the Signal Service
+ */
 @interface OWSOutgoingCallMessage : TSOutgoingMessage
 
 - (instancetype)initWithThread:(TSThread *)thread offerMessage:(OWSCallOfferMessage *)offerMessage;

src/Network/API/Requests/OWSTurnServerInfoRequest.h

@@ -1,10 +1,14 @@
-//  Created by Michael Kirk on 11/12/16.
-//  Copyright © 2016 Open Whisper Systems. All rights reserved.
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
 
 #import "TSRequest.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
+/**
+ * Fetch a list of viable ICE candidates (including TURN and STUN) used for the WebRTC call signaling process.
+ */
 NS_SWIFT_NAME(TurnServerInfoRequest)
 @interface OWSTurnServerInfoRequest : TSRequest
 

src/TextSecureKitEnv.m

@@ -1,6 +1,6 @@
-//  Created by Frederic Jacobs on 05/12/15.
-//  Copyright © 2015 Open Whisper Systems. All rights reserved.
-
+//
+//  Copyright (c) 2017 Open Whisper Systems. All rights reserved.
+//
 
 #import "TextSecureKitEnv.h"
 
@@ -44,12 +44,28 @@ static TextSecureKitEnv *TextSecureKitEnvSharedInstance;
     }
 }
 
-- (id<ContactsManagerProtocol>)contactsManager {
+#pragma mark - getters
+
+- (id<OWSCallMessageHandler>)callMessageHandler
+{
+    NSAssert(_callMessageHandler, @"Trying to access the callMessageHandler before it's set.");
+    return _callMessageHandler;
+}
+
+- (id<ContactsManagerProtocol>)contactsManager
+{
     NSAssert(_contactsManager, @"Trying to access the contactsManager before it's set.");
 
     return _contactsManager;
 }
 
+
+- (id<NotificationsProtocol>)notificationsManager
+{
+    NSAssert(_notificationsManager, @"Trying to access the notificationsManager before it's set.");
+    return _notificationsManager;
+}
+
 @end
 
 NS_ASSUME_NONNULL_END