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openrndr-application

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package org.openrndr

import kotlinx.coroutines.*
import java.time.LocalDateTime
import kotlin.contracts.ExperimentalContracts
import kotlin.contracts.InvocationKind
import kotlin.contracts.contract
import kotlin.coroutines.CoroutineContext

/**
 * launch a coroutine in the [Program] context
 */
@OptIn(ExperimentalContracts::class, DelicateCoroutinesApi::class)
@Suppress("EXPERIMENTAL_API_USAGE")
fun Program.launch(
    context: CoroutineContext = dispatcher,
    start: CoroutineStart = CoroutineStart.DEFAULT,
    block: suspend CoroutineScope.() -> Unit
): Job {
    contract {
        callsInPlace(block, InvocationKind.AT_MOST_ONCE)
    }
    return GlobalScope.launch(context, start, block)
}

actual fun Program.namedTimestamp(extension: String, path: String?):
        String {
    val now = LocalDateTime.now()
    val basename = this.name.ifBlank { this.window.title.ifBlank { "untitled" } }
    val computedPath = when {
        path.isNullOrBlank() -> ""
        path.endsWith("/") -> path
        else -> "$path/"
    }
    val ext = when {
        extension.isEmpty() -> ""
        extension.startsWith(".") -> extension
        else -> ".$extension"
    }

    return "$computedPath$basename-%04d-%02d-%02d-%02d.%02d.%02d$ext".format(
        now.year, now.month.value, now.dayOfMonth,
        now.hour, now.minute, now.second)
}