Google Analytics provides event reports that help you understandhow users interact with your app. WithCloud Functions (1st gen), youcan access conversion events you have logged from Apple and Android devicesand trigger functions based on those events.

Cloud Functions supports theGoogle AnalyticsAnalyticsEvent.This event is triggered whenever user activity generates a conversion event.For example, you could write a function thattriggers when thein_app_purchase event is generated, indicating that anin-app purchase has occurred.You must specify theAnalytics event thatyou want to trigger your function using thefunctions.analytics.event()method, and handle the event within theonLog()event handler:

exports.sendCouponOnPurchase=functions.analytics.event('in_app_purchase').onLog((event)=>{//...});

Access event attributes

With eachAnalytics event, you have access to all relevantparameters and user properties. These include information about the user, thedevice, the app, and geographical information for the event.For the complete list of parameters and user properties, see thefunctions.analytics reference.

For a purchase-triggered function as illustrated inthis sample,you might want to access user attributes such as the user's language and theevent's value (valueInUSD).This second attribute allows the sample function to test whether this is ahigh-value conversion event, in order to send a higher-value coupon to valuable customers.

/***Afterauserhascompletedapurchase,sendthemacouponviaFCMvalidontheirnextpurchase.*/exports.sendCouponOnPurchase=functions.analytics.event('in_app_purchase').onLog((event)=>{constuser=event.user;constuid=user.userId;//TheuserIDsetviathesetUserIdAPI.constpurchaseValue=event.valueInUSD;//AmountofthepurchaseinUSD.constuserLanguage=user.deviceInfo.userDefaultLanguage;//Theuserlanguageinlanguage-countryformat.//Forpurchasesabove500USD,wesendacouponofhighervalue.if(purchaseValue >500){returnsendHighValueCouponViaFCM(uid,userLanguage);}returnsendCouponViaFCM(uid,userLanguage);});
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Next steps

To learn more about handlingAnalytics events inCloud Functions,see theGoogle Analytics documentation and thefunctions.analytics reference,and try running the code samplecoupon-on-purchase.