Address Banner and MREC ad display issue. (#6)

* Address Banner and MREC ad display issue.

This commit will update the show ad for Banner/Mrec to be
called after the ad finishes downloading the assets.
Also updates the finish display ad to be called on destroy.

IOS-5559
IOS-5560

Vungle/VungleAdapter/ALVungleMediationAdapter.m

@@ -28,8 +28,9 @@ - (void)didFailToDisplayAppOpenAdWithError:(MAAdapterError *)adapterError;
 @end
 
 @interface ALVungleMediationAdapterRouter : ALMediationAdapterRouter <VungleSDKDelegate, VungleSDKCreativeTracking, VungleSDKHBDelegate>
-@property (nonatomic,   copy, nullable) void(^oldCompletionHandler)(void);
-@property (nonatomic,   copy, nullable) void(^completionBlock)(MAAdapterInitializationStatus, NSString *_Nullable);
+@property (nonatomic, copy, nullable) void(^oldCompletionHandler)(void);
+@property (nonatomic, copy, nullable) void(^completionBlock)(MAAdapterInitializationStatus, NSString * _Nullable);
+@property (nonatomic, copy, nullable) void(^adViewAdLoadCompletionBlock)(NSString *);
 @property (nonatomic, assign, getter=hasGrantedReward) BOOL grantedReward;
 @property (nonatomic, strong) NSMutableDictionary<NSString *, NSString *> *creativeIdentifiers;
 
@@ -56,8 +57,8 @@ - (instancetype)initWithFormat:(MAAdFormat *)format builderBlock:(NS_NOESCAPE MA
 @interface ALVungleMediationAdapter ()
 @property (nonatomic, strong, readonly) ALVungleMediationAdapterRouter *router;
 @property (nonatomic, copy) NSString *placementIdentifier;
+@property (nonatomic, copy) NSString *bidResponse;
 @property (nonatomic, strong) UIView *adView;
-
 // Native Ad Properties
 @property (nonatomic, strong) VungleNativeAd *nativeAd;
 @property (nonatomic, strong) ALVungleMediationAdapterNativeAdDelegate *nativeAdDelegate;
@@ -139,7 +140,15 @@ - (void)destroy
     if ( self.adView )
     {
         // Note: Not calling this for now because it clears pre-loaded/cached ad view ads as well.
-        // [[VungleSDK sharedSDK] finishedDisplayingAd];
+        if ( self.bidResponse )
+        {
+            [[VungleSDK sharedSDK] finishDisplayingAd: self.placementIdentifier adMarkup: self.bidResponse];
+        }
+        else
+        {
+            [[VungleSDK sharedSDK] finishDisplayingAd: self.placementIdentifier];
+        }
+
         self.adView = nil;
     }
 
@@ -446,6 +455,7 @@ - (void)loadAdViewAdForParameters:(id<MAAdapterResponseParameters>)parameters ad
     BOOL isBiddingAd = [bidResponse al_isValidString];
     NSString *adFormatLabel = adFormat.label;
     self.placementIdentifier = parameters.thirdPartyAdPlacementIdentifier;
+    self.bidResponse = bidResponse;
     [self log: @"Loading %@%@ ad for placement: %@...", ( isBiddingAd ? @"bidding " : @"" ), adFormatLabel, self.placementIdentifier];
 
     if ( ![[VungleSDK sharedSDK] isInitialized] )
@@ -484,23 +494,29 @@ - (void)loadAdViewAdForParameters:(id<MAAdapterResponseParameters>)parameters ad
         return;
     }
 
+    [self loadAdViewAdForParameters:parameters adFormat:adFormat adFormatLabel:adFormatLabel andNotify:delegate completion:^(NSString * placementID) {
+        self.router.adViewAdLoadCompletionBlock = nil;
+        [self showAdViewAdForParameters: parameters
+                               adFormat: adFormat
+                              andNotify: delegate];
+    }];
+}
+
+- (void)loadAdViewAdForParameters:(id<MAAdapterResponseParameters>)parameters adFormat:(MAAdFormat *)adFormat adFormatLabel:(NSString *)adFormatLabel andNotify:(id<MAAdViewAdapterDelegate>)delegate completion:(void (^)(NSString *))completion
+{
+    self.router.adViewAdLoadCompletionBlock = completion;
     NSError *error;
     BOOL isLoaded = [self loadAdForParameters: parameters
                                      adFormat: adFormat
                                         error: &error];
 
     if ( !isLoaded || error )
     {
+        self.router.adViewAdLoadCompletionBlock = nil;
         MAAdapterError *adapterError = [ALVungleMediationAdapter toMaxError: error];
         [self log: @"%@ ad failed to load with error: %@", adFormatLabel, error];
         [delegate didFailToLoadAdViewAdWithError: adapterError];
     }
-    else
-    {
-        [self showAdViewAdForParameters: parameters
-                               adFormat: adFormat
-                              andNotify: delegate];
-    }
 }
 
 - (void)showAdViewAdForParameters:(id<MAAdapterResponseParameters>)parameters adFormat:(MAAdFormat *)adFormat andNotify:(id<MAAdViewAdapterDelegate>)delegate
@@ -861,9 +877,13 @@ - (void)vungleAdPlayabilityUpdate:(BOOL)isAdPlayable placementID:(NSString *)pla
         deferToNextMainQueueRunloop(^{
             [self didLoadAdForPlacementIdentifier: placementID];
         });
-
+        if ( self.adViewAdLoadCompletionBlock )
+        {
+            self.adViewAdLoadCompletionBlock(placementID);
+        }
         return;
     }
+    self.adViewAdLoadCompletionBlock = nil;
 
     if ( error )
     {