Utils.kt

/*
 * This file is part of GNU Taler
 * (C) 2022 Taler Systems S.A.
 *
 * GNU Taler is free software; you can redistribute it and/or modify it under the
 * terms of the GNU General Public License as published by the Free Software
 * Foundation; either version 3, or (at your option) any later version.
 *
 * GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */

package net.taler.wallet.compose

import androidx.compose.foundation.layout.padding
import androidx.compose.material3.Surface
import androidx.compose.runtime.Composable
import androidx.compose.runtime.State
import androidx.compose.runtime.collectAsState
import androidx.compose.runtime.remember
import androidx.compose.ui.Modifier
import androidx.compose.ui.input.nestedscroll.nestedScroll
import androidx.compose.ui.platform.LocalLifecycleOwner
import androidx.compose.ui.platform.rememberNestedScrollInteropConnection
import androidx.compose.ui.unit.dp
import androidx.lifecycle.Lifecycle
import androidx.lifecycle.LifecycleOwner
import androidx.lifecycle.flowWithLifecycle
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.StateFlow
import kotlin.coroutines.CoroutineContext
import kotlin.coroutines.EmptyCoroutineContext

@Composable
fun <T> rememberFlow(
    flow: Flow<T>,
    lifecycleOwner: LifecycleOwner = LocalLifecycleOwner.current,
): Flow<T> = remember(key1 = flow, key2 = lifecycleOwner) {
    flow.flowWithLifecycle(lifecycleOwner.lifecycle, Lifecycle.State.STARTED)
}

@Composable
fun <T : R, R> Flow<T>.collectAsStateLifecycleAware(
    initial: R,
    context: CoroutineContext = EmptyCoroutineContext,
): State<R> {
    val lifecycleAwareFlow = rememberFlow(flow = this)
    return lifecycleAwareFlow.collectAsState(initial = initial, context = context)
}

@Suppress("StateFlowValueCalledInComposition")
@Composable
fun <T> StateFlow<T>.collectAsStateLifecycleAware(
    context: CoroutineContext = EmptyCoroutineContext,
): State<T> = collectAsStateLifecycleAware(initial = value, context = context)

fun Modifier.safeHorizontalPadding(): Modifier =
    then(Modifier.padding(horizontal = 14.dp))

fun Modifier.cardPaddings(): Modifier =
    then(Modifier.padding(horizontal = 16.dp, vertical = 10.dp))

@Composable
fun TalerSurface(content: @Composable () -> Unit) {
    Surface(Modifier.nestedScroll(rememberNestedScrollInteropConnection())) {
        content()
    }
}