JoaoGeniselli

// Depends on:
"com.google.zxing:core"
"com.journeyapps:zxing-android-embedded"
"com.google.accompanist:accompanist-permissions"

@Composable
fun BarcodeScanner(
    label: String = "Ler código",
    onDetectBarcode: (barcodes: List<String>) -> Unit,
    onManualInputClick: () -> Unit = {},

JoaoGeniselli

interface OrientationLocker {
    fun lockToOrientation(orientation: ScreenOrientation)
}

enum class ScreenOrientation {
    PORTRAIT,
    LANDSCAPE,
    AUTO,
}

JoaoGeniselli

@Composable
fun OnLifecycleEvent(block: (owner: LifecycleOwner, event: Lifecycle.Event) -> Unit) {
    val eventHandler = rememberUpdatedState(block)
    val lifecycleOwner = rememberUpdatedState(LocalLifecycleOwner.current)

    DisposableEffect(lifecycleOwner.value) {
        val lifecycle = lifecycleOwner.value.lifecycle
        val observer = LifecycleEventObserver { owner, event ->
            eventHandler.value(owner, event)
        }

JoaoGeniselli

const val RAW_CPF_LENGTH = 11
const val RAW_CNPJ_LENGTH = 14

fun String.formatCPF(): String {
    val digits = this.filter { it.isDigit() }
    if (digits.length != RAW_CPF_LENGTH) return this // invalid.
    return buildString {
        append(digits.substring(0 .. 2))
        append(".")
        append(digits.substring(3 .. 5))

JoaoGeniselli

class Phone(val rawPhone: String) {

    val countryCode: String
    val regionCode: String
    val number: String

    init {
        when (rawPhone.length) {
            COMPLETE_CELLPHONE_LENGTH -> {
                countryCode = rawPhone.take(2)

JoaoGeniselli

val gson = Gson()

inline fun <reified T> String.fromJson(): T = gson.fromJson(this, T::class.java)

inline fun <reified T> String.fromJsonOrNull(): T? =
    runCatching { gson.fromJson(this, T::class.java) }.getOrNull()

fun Any.toJson(): String = gson.toJson(this)

JoaoGeniselli

@Composable
inline fun <reified T : ViewModel> NavBackStackEntry.sharedViewModel(
    controller: NavHostController
): T {
    val graphRoute = destination.parent?.route ?: return koinViewModel()
    val parentEntry = remember(this) {
        controller.getBackStackEntry(graphRoute)
    }
    return koinViewModel(viewModelStoreOwner = parentEntry)
}

JoaoGeniselli

const val MAJORITY_AGE = 18

val isRequiredMajority = true

val yearRange = Calendar.getInstance()
    .run { get(Calendar.YEAR) }
    .let { currentYear -> 
      val firstYear = currentYear - 100
      val lastYear = if (isRequiredMajority) currentYear - MAJORITY_AGE else currentYear
      firstYear..lastYear

JoaoGeniselli

const val CENTS_TO_REALS_POINTS = 2

fun Int.centsToReals(): BigDecimal = BigDecimal(this).movePointLeft(CENTS_TO_REALS_POINTS)
fun BigDecimal.realsToCents(): Int = movePointRight(CENTS_TO_REALS_POINTS).intValueExact()

val localeBR = Locale("pt", "BR")
val blrFormatter = NumberFormat.getCurrencyInstance(localeBR)
fun Int.formatBlr() = blrFormatter.format(centsToReals())
fun BigDecimal.formatBlr() = blrFormatter.format(this)

JoaoGeniselli

const val RAW_PHONE_LENGTH = 11

@Composable
fun ComposeField() {
    var phone by remember { mutableStateOf("") }
    val mask = remember { mask("(##) #####-####") } // See 'Masquerade.kt' Gist.
    OutlinedTextField(
        value = phone,
        keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
        placeholder = { Text(mask.pattern) },