Add Ad Impression constants to public header

PiperOrigin-RevId: 334451358

Author: Googler

analytics/ios_headers/FIREventNames.h

@@ -69,6 +69,19 @@ static NSString *const kFIREventAddToCart NS_SWIFT_NAME(AnalyticsEventAddToCart)
 static NSString *const kFIREventAddToWishlist NS_SWIFT_NAME(AnalyticsEventAddToWishlist) =
     @"add_to_wishlist";
 
+/// Ad Impression event. This event signifies when a user sees an ad impression. Params:
+///
+/// <ul>
+///     <li>@c kFIRParameterAdPlatform (NSString) (optional)</li>
+///     <li>@c kFIRParameterAdFormat (NSString) (optional)</li>
+///     <li>@c kFIRParameterAdSource (NSString) (optional)</li>
+///     <li>@c kFIRParameterAdUnitName (NSString) (optional)</li>
+///     <li>@c kFIRParameterCurrency (NSString) (optional)</li>
+///     <li>@c kFIRParameterValue (double as NSNumber) (optional)</li>
+/// </ul>
+static NSString *const kFIREventAdImpression NS_SWIFT_NAME(AnalyticsEventAdImpression) =
+    @"ad_impression";
+
 /// App Open event. By logging this event when an App becomes active, developers can understand how
 /// often users leave and return during the course of a Session. Although Sessions are automatically
 /// reported, this event can provide further clarification around the continuous engagement of

analytics/ios_headers/FIRParameterNames.h

@@ -39,6 +39,17 @@
 static NSString *const kFIRParameterAchievementID NS_SWIFT_NAME(AnalyticsParameterAchievementID) =
     @"achievement_id";
 
+/// The ad format (e.g. Banner, Interstitial, Rewarded, Native, Rewarded Interstitial, Instream).
+/// (NSString).
+/// <pre>
+///     NSDictionary *params = @{
+///       kFIRParameterAdFormat : @"Banner",
+///       // ...
+///     };
+/// </pre>
+static NSString *const kFIRParameterAdFormat NS_SWIFT_NAME(AnalyticsParameterAdFormat) =
+    @"ad_format";
+
 /// Ad Network Click ID (NSString). Used for network-specific click IDs which vary in format.
 /// <pre>
 ///     NSDictionary *params = @{
@@ -49,6 +60,36 @@ static NSString *const kFIRParameterAchievementID NS_SWIFT_NAME(AnalyticsParamet
 static NSString *const kFIRParameterAdNetworkClickID
     NS_SWIFT_NAME(AnalyticsParameterAdNetworkClickID) = @"aclid";
 
+/// The ad platform (e.g. MoPub, IronSource) (NSString).
+/// <pre>
+///     NSDictionary *params = @{
+///       kFIRParameterAdPlatform : @"MoPub",
+///       // ...
+///     };
+/// </pre>
+static NSString *const kFIRParameterAdPlatform NS_SWIFT_NAME(AnalyticsParameterAdPlatform) =
+    @"ad_platform";
+
+/// The ad source (e.g. AdColony) (NSString).
+/// <pre>
+///     NSDictionary *params = @{
+///       kFIRParameterAdSource : @"AdColony",
+///       // ...
+///     };
+/// </pre>
+static NSString *const kFIRParameterAdSource NS_SWIFT_NAME(AnalyticsParameterAdSource) =
+    @"ad_source";
+
+/// The ad unit name (NSString).
+/// <pre>
+///     NSDictionary *params = @{
+///       kFIRParameterAdUnitName : @"Banner_03",
+///       // ...
+///     };
+/// </pre>
+static NSString *const kFIRParameterAdUnitName NS_SWIFT_NAME(AnalyticsParameterAdUnitName) =
+    @"ad_unit_name";
+
 /// A product affiliation to designate a supplying company or brick and mortar store location
 /// (NSString). <pre>
 ///     NSDictionary *params = @{