FabricEventDsl.kt

import com.crashlytics.android.answers.*
import io.fabric.sdk.android.Fabric
import java.math.BigDecimal
import java.util.*

@DslMarker
annotation class FabricEventDsl

@FabricEventDsl
class CustomAttribute {
    lateinit var key: String
    var value: Any? = null

    fun build(event: AnswersEvent<*>) {
        value?.let {
            when (value) {
                is Number -> event.putCustomAttribute(key, it as Number)
                else -> event.putCustomAttribute(key, it.toString())
            }
        }
    }
}

@Suppress("FINITE_BOUNDS_VIOLATION_IN_JAVA")
abstract class EventBuilder<T : AnswersEvent<T>> {

    private val customAttributes: MutableList<CustomAttribute> = mutableListOf()

    abstract fun createEvent(): T

    fun build(): T = createEvent().apply {
        configure()
        customAttributes.forEach {
            it.build(this)
        }
    }

    fun attr(block: CustomAttribute.() -> Unit) {
        customAttributes.add(CustomAttribute().apply(block))
    }

    abstract fun T.configure()
}

@FabricEventDsl
class AddToCartEventBuilder : EventBuilder<AddToCartEvent>() {

    private lateinit var priceValue: BigDecimal

    var price: Any? = null
        set(value) {
            when (value) {
                is String -> value.toDoubleOrNull()
                is Number -> value.toDouble()
                else -> value.toString().toDoubleOrNull()
            }?.let {
                priceValue = BigDecimal.valueOf(it)
            }
        }

    private var currencyValue: Currency? = null

    var currency: String? = null
        set(value) {
            try {
                currencyValue = Currency.getInstance(value)
            } catch (_: IllegalArgumentException) {

            }
        }

    lateinit var itemId: Any
    var name: String? = null
    var categoryId: Any? = null

    override fun createEvent(): AddToCartEvent = AddToCartEvent()

    override fun AddToCartEvent.configure() {
        putItemId(itemId.toString())
        categoryId?.let {
            putCustomAttribute("category_id", it.toString())
        }
        currencyValue?.let {
            putCurrency(it)
        }
        putItemName(name)
        putItemPrice(priceValue)
    }
}

@FabricEventDsl
class StartCheckoutEventBuilder : EventBuilder<StartCheckoutEvent>() {

    private lateinit var totalPriceValue: BigDecimal

    var totalPrice: Any = 0
        set(value) {
            when (value) {
                is String -> value.toDoubleOrNull()
                is Number -> value.toDouble()
                else -> value.toString().toDoubleOrNull()
            }?.let {
                totalPriceValue = BigDecimal.valueOf(it)
            }
        }

    private var currencyValue: Currency? = null

    var currency: String? = null
        set(value) {
            try {
                currencyValue = Currency.getInstance(value)
            } catch (_: IllegalArgumentException) {

            }
        }

    override fun createEvent(): StartCheckoutEvent = StartCheckoutEvent()

    private var itemCount: Int = 0

    var items: Any? = null
        set(value) {
            itemCount = when (value) {
                is Collection<*> -> value.size
                is Number -> value.toInt()
                else -> 0
            }
        }

    override fun StartCheckoutEvent.configure() {
        putTotalPrice(totalPriceValue)
        currencyValue?.let {
            putCurrency(it)
        }
        putItemCount(itemCount)
    }

}

@FabricEventDsl
class ContentViewEventBuilder : EventBuilder<ContentViewEvent>() {
    override fun createEvent(): ContentViewEvent = ContentViewEvent()

    lateinit var contentId: String
    var contentName: String? = null
    lateinit var contentType: String

    override fun ContentViewEvent.configure() {
        putContentId(contentId)
        contentName?.let { putContentName(contentName) }
        putContentName(contentType)
    }
}

@FabricEventDsl
class SignUpEventBuilder : EventBuilder<SignUpEvent>() {

    lateinit var signMethod: String
    var isSuccess: Boolean = false

    override fun createEvent(): SignUpEvent = SignUpEvent()

    override fun SignUpEvent.configure() {
        putMethod(signMethod)
        putSuccess(isSuccess)
    }
}

@FabricEventDsl
class LoginEventBuilder : EventBuilder<LoginEvent>() {

    lateinit var signMethod: String
    var isSuccess: Boolean = false

    override fun createEvent(): LoginEvent = LoginEvent()

    override fun LoginEvent.configure() {
        putMethod(signMethod)
        putSuccess(isSuccess)
    }
}

@FabricEventDsl
fun sendAddCartEvent(block: AddToCartEventBuilder.() -> Unit) =
        AddToCartEventBuilder().apply(block).build().also {
            answers()?.logAddToCart(it)
        }

@FabricEventDsl
fun sendStartCheckoutEvent(block: StartCheckoutEventBuilder.() -> Unit) =
        StartCheckoutEventBuilder().apply(block).build().also {
            answers()?.logStartCheckout(it)
        }

@FabricEventDsl
fun sendCustomEvent(name: String, block: EventBuilder<CustomEvent>.() -> Unit) {
    object : EventBuilder<CustomEvent>() {
        override fun createEvent(): CustomEvent = CustomEvent(name)

        override fun CustomEvent.configure() {

        }
    }.apply(block).build().also {
        answers()?.logCustom(it)
    }
}

@FabricEventDsl
fun sendContentView(block: ContentViewEventBuilder.() -> Unit) {
    ContentViewEventBuilder().apply(block).build().also {
        answers()?.logContentView(it)
    }
}

@FabricEventDsl
fun sendSignUp(block: SignUpEventBuilder.() -> Unit) {
    SignUpEventBuilder().apply(block).build().also {
        answers()?.logSignUp(it)
    }
}

@FabricEventDsl
fun sendLogin(block: LoginEventBuilder.() -> Unit) {
    LoginEventBuilder().apply(block).build().also {
        answers()?.logLogin(it)
    }
}

private fun answers(): Answers? = if (Fabric.isInitialized()) Answers.getInstance() else null

Hi, How do I use this in any of Activity or Fragment. Can you please add a bit of source to call your sendAddCartEvent fun.

how to create block to pass ?