Use Google Tag Manager

If you are using Firebase to track events such as screenviews or transactions, you can trigger these events for Contentsquare with minimal effort, thanks to Google Tag Manager.

If you are following this Google Tag Manager integration process, you should already have followed the Google Tag Manager + Firebase setup as described in Google’s Tag Manager + Firebase: Getting Started

You also need to integrate the Contentsquare SDK see section: Add Contentsquare to your app.

This section covers how to trigger a Contentsquare screenview event for every Firebase screenview event. Firebase allows you to automatically logs screenviews but also to trigger them manually for an exhaustive coverage of your app screens.

Contentsquare screenview events require to pass the screen name as a parameter.

Firebase has 2 ways to track screens:

1. Variable for automatically tracked screens

Section titled 1. Variable for automatically tracked screens

Firebase’s screen_view events have an _sc parameter (for screen class) which we can use as parameter for screens that are automatically tracked.

We will create a variable called Automatic Screenview Name with:

  • The Variable Type set to Event Parameter
  • The Event Type set to Custom Parameter
  • The Event Parameter Key set manually to _sc

2. Variable for manually tracked screens

Section titled 2. Variable for manually tracked screens

Firebase’s screen_view events have a _sn parameter (for screen name) which we can use as parameter for screens that are manually tracked.

We will create a variable called Manual Screenview Name with:

  • The Variable Type set to Event Parameter
  • The Event Type set to Custom Parameter
  • The Event Parameter Key set manually to _sn

We can also create variables for our own custom parameters, for example, we can send a screen_view event like this:

Analytics.logEvent(AnalyticsEventScreenView, parameters: [
AnalyticsParameterScreenName: "MyScreenName",
"is_user_logged_in": "true"
])

and create a variable called Is User Logged In with:

  • The Variable Type set to Event Parameter
  • The Event Type set to Custom Parameter
  • The Event Parameter Key set manually to is_user_logged_in

Check out Configure variables in Tag Manager for more information.

We will need to tell Google Tag Manager when to send a Contentsquare screenview, and for that we need to create a Trigger. Firebase sends screenviews as events of name screen_view, so we need to create a trigger for that event.

  • Name your trigger Screenview Trigger
  • Trigger Type should be set to Custom
  • Trigger should fire on Some Events
  • For the Event, the Event Name should be equal to screen_view

Create the custom function Tag

Section titled Create the custom function Tag

In Google Tag Manager, a Tag is what configures what happens when some trigger is activated. It will be automatically linked to a custom class which we will create in a later step.

The Tag Type should be a Function Call. You will also need to fill in the Class Name field with a class name of your liking, typically related to what the tag is about (here we chose ContentsquareScreenviewTag), which you will re-use later.

Adding the trigger and the variables to the Tag

Section titled Adding the trigger and the variables to the Tag

Edit the ContentsquareScreenviewTag Tag:

  • Add an argument with the key auto_screen_name and the variable {{Automatic Screenview Name}} as the value
  • Add an argument with the key manual_screen_name and the variables {{Manual Screenview Name}} | {{Is User Logged In}} or {{Manual Screenview Name}} as the value
  • Add Contentsquare Screenview Trigger as the Tag’s trigger

It should look like this now:

Create the custom function Tag class

Section titled Create the custom function Tag class

In your app code, create a class of the same name as the Class Name you configured in the GTM interface, for example ContentsquareScreenviewTag. This is how GTM connects the configuration and the actual class to trigger. This class is used to call the Contentsquare screenview tracking function as follows:

@objc(ContentsquareScreenviewTag)
final class ContentsquareScreenviewTag: NSObject, TAGCustomFunction {
@objc func execute(withParameters parameters: [AnyHashable : Any]!) -> NSObject! {
let autoScreenName = parameters[AnyHashable("auto_screen_name")] as? String
let manualScreenName = parameters[AnyHashable("manual_screen_name")] as? String
let screenName = manualScreenName ?? autoScreenName ?? "No screen name!"
Contentsquare.send(screenViewWithName: screenName)
return nil
}
}

Now, every time Firebase sends a screenview event, Contentsquare will send one as well.

A Contentsquare transaction event can also be triggered for every Firebase ecommerce_purchase event (See Firebase Objective-C/Swift documentation). To do so, you will need to follow the setup described below.

We have to create at least two variables in order to be able to build a transaction event, Value and Currency. Optionally, it is also possible to pass a transaction identifier, meaning you would need to create an additional variable in order to be able to use it.

Create the following custom trigger.

Create a Function call Tag called ContentsquareTransactionTag, pass the two to three variables created earlier as arguments (skip the id line if you do not want to use it) and set its trigger to the one you just created.

*/}

Implementing the function call

Section titled Implementing the function call

We need to create a ContentsquareTransactionTag class, and have it adhere to the TAGCustomFunction protocol to link it to the Google Tag Manager custom Tag of the same name.

Take good note that in order to be able to create and send a Contentsquare Transaction successfully, when you create a Firebase purchase event you will have to at least pass values for kFIRParameterValue and kFIRParameterCurrency, and can optionally pass a value for kFIRParameterTransactionID, when you create a Firebase purchase event.

@objc(ContentsquareTransactionTag)
final class ContentsquareTransactionTag: NSObject, TAGCustomFunction {
@objc func execute(withParameters parameters: [AnyHashable : Any]!) -> NSObject! {
if let currency = parameters[AnyHashable("currency")] as? String,
let value = parameters[AnyHashable("value")] as? Float {
let identifier = parameters[AnyHashable("id")] as? String
Contentsquare.send(transaction: CustomerTransaction.init(id: identifier, value: value, currency: currency))
}
return nil
}
}

Now, every time Firebase sends an ecommerce_purchase event, Contentsquare will send one as well.

We can send values from any Firebase event as a Contentsquare dynamic variable:

Analytics.logEvent("addToCart", parameters: [
"product_count": 12,
"product_name": "ProductA"
])

The addToCart event has parameters product_count, product_name, we will create variables called Product Count and Product Name with:

  • The Variable Type set to Event Parameter
  • The Event Type set to Custom Parameter
  • The Event Parameter Key set manually to product_count/product_name

Check out Configure variables in Tag Manager for more information.

We need to create a Trigger to tell Google Tag Manager when to send a Contentsquare dynamic variable, so we will create one for the event addToCart.

  • Name your trigger AddToCartTrigger
  • Trigger Type should be set to Custom
  • Trigger should fire on Some Events
  • For the Event, the Event Name should be equal to addToCart

Create the custom function Tag

Section titled Create the custom function Tag

We need to create a function tag AddToCartDynamicVar

  • The Tag Type set to Function Call
  • The Class Name set to DynamicVarTag (we’ll create this class later)
  • Add two arguments, Key: cs_dynamic_var_key, Value: Product, Key: cs_dynamic_var_value, Value: {{Product Name}}: {{Product Count}}
  • The Triggering set to AddToCartTrigger

It should look like this now:

Create the custom function Tag class

Section titled Create the custom function Tag class

In your app code, create a class named DynamicVarTag, assuming you used the name we suggested when creating the Tag in the GTM interface. If you named it otherwise, make sure to use the same name here, as it is how GTM connects the configuration and the actual class to trigger. We will use this class to call the Contentsquare dynamic variable function as follows.

import GoogleTagManager
import ContentsquareModule
@objc(DynamicVarTag)
final class DynamicVarTag: NSObject, TAGCustomFunction {
@objc func execute(withParameters parameters: [AnyHashable : Any]!) -> NSObject! {
guard let dynamicVarKey = parameters["cs_dynamic_var_key"] as? String else {
return nil
}
let dynamicVarValue = parameters["cs_dynamic_var_value"]
if let dynamicVarStringValue = dynamicVarValue as? String {
let dynamicVarString = DynamicVar(key: dynamicVarKey, value: dynamicVarStringValue)
Contentsquare.send(dynamicVar: dynamicVarString)
} else if let dynamicVarIntValue = dynamicVarValue as? UInt32 {
let dynamicVarInt = DynamicVar(key: dynamicVarKey, value: dynamicVarIntValue)
Contentsquare.send(dynamicVar: dynamicVarInt)
}
return nil
}
}

Now, every time Firebase sends a addToCart event, Contentsquare will send a dynamic variable DynamicVar(key: "Product", value: "ProductA: 12").