AlertDialog.kt

AlertDialog.kt

fun Fragment.createAlertDialog() =
    AlertDialog.Builder(ContextThemeWrapper(context, R.style.custom_dialog_style))


data class DialogAction(
    var text: String,
    var onClick: (() -> Unit)? = null
)

data class AlertDialogData(
    val cancellable: Boolean,
    var title: String = "", var message: String = "",
    var positiveAction: (DialogAction.() -> Unit)? = null,
    var negativeAction: (DialogAction.() -> Unit)? = null,
    var neutralAction: (DialogAction.() -> Unit)? = null
)

/**
 * simple DSL for creating alert dialogs
 */
fun Fragment.alertDialog(
    cancellable: Boolean = true,
    init: AlertDialogData.() -> Unit
): AlertDialog {

    val alertDialogData = AlertDialogData(cancellable)
    alertDialogData.init()

    val builder = createAlertDialog()
        .setTitle(alertDialogData.title)
        .setMessage(alertDialogData.message)

    alertDialogData.positiveAction?.let { body ->
        val action = DialogAction("")
        body(action)
        builder.setPositiveButton(action.text) { _, _ ->
            action.onClick?.invoke()
        }
    }
    alertDialogData.negativeAction?.let { body ->
        val action = DialogAction("")
        body(action)
        builder.setNegativeButton(action.text) { _, _ ->
            action.onClick?.invoke()
        }
    }
    alertDialogData.neutralAction?.let { body ->
        val action = DialogAction("")
        body(action)
        builder.setNeutralButton(action.text) { _, _ ->
            action.onClick?.invoke()
        }
    }
    return builder.create()
}