Turn on auto-resubscribe for Darwin wildcard subscriptions. (#16201)

We weren't doing it before, but should do it.

Author: bzbarsky-apple

src/darwin/CHIPTool/CHIPTool/View Controllers/Temperature Sensor/TemperatureSensorViewController.m

@@ -203,6 +203,7 @@ - (void)reportFromUserEnteredSettings
                 [chipDevice subscribeWithQueue:dispatch_get_main_queue()
                                    minInterval:minIntervalSeconds
                                    maxInterval:maxIntervalSeconds
+                                        params:nil
                                  reportHandler:^(NSArray<CHIPAttributeReport *> * _Nullable reports, NSError * _Nullable error) {
                                      if (error) {
                                          NSLog(@"Status: update reportAttributeMeasuredValue completed with error %@",

src/darwin/Framework/CHIP/CHIPCluster.h

@@ -75,6 +75,20 @@ NS_ASSUME_NONNULL_BEGIN
  */
 @property (strong, nonatomic, nullable) NSNumber * keepPreviousSubscriptions;
 
+/**
+ * Whether the subscription should automatically try to re-establish if it
+ * drops.  nil (the default value) is treated as YES.
+ *
+ * If NO, loss of subscription will simply lead to an error report.  Some
+ * subscription APIs do not support this value.
+ *
+ * If YES, loss of subscription will lead to an automatic resubscription
+ * attempt.  If this succeeds, the subscriptionEstablished callback will be
+ * called again.
+ *
+ */
+@property (strong, nonatomic, nullable) NSNumber * autoResubscribe;
+
 - (instancetype)init;
 @end
 

src/darwin/Framework/CHIP/CHIPCluster.mm

@@ -76,6 +76,7 @@ - (instancetype)init
 {
     if (self = [super init]) {
         _keepPreviousSubscriptions = nil;
+        _autoResubscribe = nil;
     }
     return self;
 }

src/darwin/Framework/CHIP/CHIPDevice.h

@@ -20,6 +20,8 @@
 
 #import <Foundation/Foundation.h>
 
+@class CHIPSubscribeParams;
+
 NS_ASSUME_NONNULL_BEGIN
 
 typedef void (^CHIPDeviceResponseHandler)(NSArray<NSDictionary<NSString *, id> *> * _Nullable values, NSError * _Nullable error);
@@ -65,13 +67,15 @@ extern NSString * const kCHIPStatusKey;
  *
  * subscriptionEstablished block, if not nil, will be called once the
  * subscription is established.  This will be _after_ the first (priming) call
- * to reportHandler.
+ * to reportHandler.  Note that if the CHIPSubscribeParams are set to
+ * automatically resubscribe this can end up being called more than once.
  *
  * TODO: The "all events" part does not work yet.
  */
 - (void)subscribeWithQueue:(dispatch_queue_t)queue
                 minInterval:(uint16_t)minInterval
                 maxInterval:(uint16_t)maxInterval
+                     params:(nullable CHIPSubscribeParams *)params
               reportHandler:(void (^)(NSArray * _Nullable value, NSError * _Nullable error))reportHandler
     subscriptionEstablished:(nullable void (^)(void))subscriptionEstablishedHandler;
 

src/darwin/Framework/CHIP/CHIPDevice.mm

@@ -238,6 +238,8 @@ - (instancetype)initWithDevice:(chip::DeviceProxy *)device
 
     void OnDone() override;
 
+    void OnDeallocatePaths(ReadPrepareParams && aReadPrepareParams) override;
+
     void OnSubscriptionEstablished(uint64_t aSubscriptionId) override;
 
     void ReportError(CHIP_ERROR err);
@@ -274,6 +276,7 @@ - (instancetype)initWithDevice:(chip::DeviceProxy *)device
 - (void)subscribeWithQueue:(dispatch_queue_t)queue
                 minInterval:(uint16_t)minInterval
                 maxInterval:(uint16_t)maxInterval
+                     params:(nullable CHIPSubscribeParams *)params
               reportHandler:(void (^)(NSArray * _Nullable value, NSError * _Nullable error))reportHandler
     subscriptionEstablished:(nullable void (^)(void))subscriptionEstablishedHandler
 {
@@ -284,18 +287,30 @@ - (void)subscribeWithQueue:(dispatch_queue_t)queue
         });
         return;
     }
-    AttributePathParams attributePath; // Wildcard endpoint, cluster, attribute.
-    ReadPrepareParams params(device->GetSecureSession().Value());
-    params.mMinIntervalFloorSeconds = minInterval;
-    params.mMaxIntervalCeilingSeconds = maxInterval;
-    params.mpAttributePathParamsList = &attributePath;
-    params.mAttributePathParamsListSize = 1;
+
+    // Wildcard endpoint, cluster, attribute.
+    auto attributePath = std::make_unique<AttributePathParams>();
+    ReadPrepareParams readParams(device->GetSecureSession().Value());
+    readParams.mMinIntervalFloorSeconds = minInterval;
+    readParams.mMaxIntervalCeilingSeconds = maxInterval;
+    readParams.mpAttributePathParamsList = attributePath.get();
+    readParams.mAttributePathParamsListSize = 1;
+    readParams.mKeepSubscriptions
+        = (params != nil) && (params.keepPreviousSubscriptions != nil) && [params.keepPreviousSubscriptions boolValue];
 
     auto callback = std::make_unique<SubscriptionCallback>(queue, reportHandler, subscriptionEstablishedHandler);
     auto readClient = std::make_unique<ReadClient>(InteractionModelEngine::GetInstance(), device->GetExchangeManager(),
         callback->GetBufferedCallback(), ReadClient::InteractionType::Subscribe);
 
-    CHIP_ERROR err = readClient->SendRequest(params);
+    CHIP_ERROR err;
+    if (params != nil && params.autoResubscribe != nil && ![params.autoResubscribe boolValue]) {
+        err = readClient->SendRequest(readParams);
+    } else {
+        // SendAutoResubscribeRequest cleans up the params, even on failure.
+        attributePath.release();
+        err = readClient->SendAutoResubscribeRequest(std::move(readParams));
+    }
+
     if (err != CHIP_NO_ERROR) {
         dispatch_async(queue, ^{
             reportHandler(nil, [CHIPError errorForCHIPErrorCode:err]);
@@ -1266,12 +1281,31 @@ - (instancetype)initWithPath:(const ConcreteDataAttributePath &)path value:(null
     }
 }
 
+void SubscriptionCallback::OnDeallocatePaths(ReadPrepareParams && aReadPrepareParams)
+{
+    VerifyOrDie((aReadPrepareParams.mAttributePathParamsListSize == 0 && aReadPrepareParams.mpAttributePathParamsList == nullptr)
+        || (aReadPrepareParams.mAttributePathParamsListSize == 1 && aReadPrepareParams.mpAttributePathParamsList != nullptr));
+    if (aReadPrepareParams.mpAttributePathParamsList) {
+        delete aReadPrepareParams.mpAttributePathParamsList;
+    }
+
+    VerifyOrDie((aReadPrepareParams.mDataVersionFilterListSize == 0 && aReadPrepareParams.mpDataVersionFilterList == nullptr)
+        || (aReadPrepareParams.mDataVersionFilterListSize == 1 && aReadPrepareParams.mpDataVersionFilterList != nullptr));
+    if (aReadPrepareParams.mpDataVersionFilterList != nullptr) {
+        delete aReadPrepareParams.mpDataVersionFilterList;
+    }
+
+    VerifyOrDie((aReadPrepareParams.mEventPathParamsListSize == 0 && aReadPrepareParams.mpEventPathParamsList == nullptr)
+        || (aReadPrepareParams.mEventPathParamsListSize == 1 && aReadPrepareParams.mpEventPathParamsList != nullptr));
+    if (aReadPrepareParams.mpEventPathParamsList) {
+        delete aReadPrepareParams.mpEventPathParamsList;
+    }
+}
+
 void SubscriptionCallback::OnSubscriptionEstablished(uint64_t aSubscriptionId)
 {
     if (mSubscriptionEstablishedHandler) {
         dispatch_async(mQueue, mSubscriptionEstablishedHandler);
-        // Don't need it anymore.
-        mSubscriptionEstablishedHandler = nil;
     }
 }
 

src/darwin/Framework/CHIP/templates/CHIPClustersObjc-src.zapt

@@ -137,6 +137,10 @@ subscriptionEstablished:(SubscriptionEstablishedHandler _Nullable)subscriptionEs
           not great from a type-safety perspective, of course. }}
       reportHandler,
       ^(Cancelable * success, Cancelable * failure) {
+          if (params != nil && params.autoResubscribe != nil && ![params.autoResubscribe boolValue]) {
+              // We don't support disabling auto-resubscribe.
+              return CHIP_ERROR_INVALID_ARGUMENT;
+          }
           using TypeInfo = {{asUpperCamelCase parent.name}}::Attributes::{{asUpperCamelCase name}}::TypeInfo;
           auto successFn = Callback<{{>attribute_data_callback_name}}Callback>::FromCancelable(success);
           auto failureFn = Callback<CHIPDefaultFailureCallbackType>::FromCancelable(failure);

src/darwin/Framework/CHIP/templates/CHIPClustersObjc.zapt

@@ -43,6 +43,10 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)write{{>attribute}}WithValue:({{asObjectiveCType type parent.name}})value completionHandler:(StatusCompletion)completionHandler;
 {{/if}}
 {{#if isReportableAttribute}}
+/**
+ * This API does not support setting autoResubscribe to NO in the
+ * CHIPSubscribeParams.
+ */
 - (void) subscribe{{>attribute}}WithMinInterval:(NSNumber * _Nonnull)minInterval  maxInterval:(NSNumber * _Nonnull)maxInterval
        params:(CHIPSubscribeParams * _Nullable)params
 subscriptionEstablished:(SubscriptionEstablishedHandler _Nullable)subscriptionEstablishedHandler reportHandler:(void (^)({{asObjectiveCClass type parent.name}} * _Nullable value, NSError * _Nullable error))reportHandler;