Introduce ListsScreen. Current implementation is focused on follows.
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KotlinGeekDev
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/**
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* Copyright (c) 2024 Vitor Pamplona
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
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* Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package com.vitorpamplona.amethyst.ui.screen.loggedIn.lists
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import androidx.compose.foundation.border
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import androidx.compose.foundation.layout.Arrangement
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import androidx.compose.foundation.layout.Column
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import androidx.compose.foundation.layout.Row
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import androidx.compose.foundation.layout.Spacer
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import androidx.compose.foundation.layout.padding
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import androidx.compose.foundation.lazy.LazyColumn
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import androidx.compose.foundation.lazy.itemsIndexed
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import androidx.compose.foundation.lazy.rememberLazyListState
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import androidx.compose.foundation.shape.RoundedCornerShape
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import androidx.compose.material3.Icon
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import androidx.compose.material3.Text
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import androidx.compose.runtime.Composable
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import androidx.compose.runtime.DisposableEffect
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import androidx.compose.runtime.collectAsState
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import androidx.compose.runtime.derivedStateOf
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import androidx.compose.runtime.getValue
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import androidx.compose.ui.Alignment
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import androidx.compose.ui.Modifier
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import androidx.compose.ui.graphics.Color
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import androidx.compose.ui.platform.LocalLifecycleOwner
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import androidx.compose.ui.res.painterResource
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import androidx.compose.ui.text.font.FontWeight
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import androidx.compose.ui.text.style.TextOverflow
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import androidx.compose.ui.tooling.preview.Preview
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import androidx.compose.ui.unit.Dp
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import androidx.compose.ui.unit.dp
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import androidx.lifecycle.Lifecycle
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import androidx.lifecycle.LifecycleEventObserver
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import androidx.lifecycle.compose.collectAsStateWithLifecycle
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import androidx.lifecycle.viewmodel.compose.viewModel
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import com.vitorpamplona.amethyst.R
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import com.vitorpamplona.amethyst.model.Note
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import com.vitorpamplona.amethyst.ui.feeds.FeedState
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import com.vitorpamplona.amethyst.ui.navigation.INav
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import com.vitorpamplona.amethyst.ui.navigation.TopBarWithBackButton
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import com.vitorpamplona.amethyst.ui.screen.NostrUserFollowSetFeedViewModel
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import com.vitorpamplona.amethyst.ui.screen.loggedIn.AccountViewModel
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import com.vitorpamplona.amethyst.ui.screen.loggedIn.DisappearingScaffold
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import com.vitorpamplona.amethyst.ui.stringRes
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import com.vitorpamplona.amethyst.ui.theme.FeedPadding
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import com.vitorpamplona.amethyst.ui.theme.StdVertSpacer
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import com.vitorpamplona.amethyst.ui.theme.ThemeComparisonColumn
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import com.vitorpamplona.quartz.events.PeopleListEvent
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import com.vitorpamplona.quartz.events.PeopleListEvent.FollowSet
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import com.vitorpamplona.quartz.signers.NostrSigner
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@Composable
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fun ListsScreen(
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accountViewModel: AccountViewModel,
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nav: INav,
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) {
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val followSetsViewModel: NostrUserFollowSetFeedViewModel =
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viewModel(
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factory = NostrUserFollowSetFeedViewModel.Factory(accountViewModel.account),
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)
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CustomListsScreen(
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followSetsViewModel,
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accountViewModel,
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nav,
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)
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}
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@Composable
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fun CustomListsScreen(
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followSetsViewModel: NostrUserFollowSetFeedViewModel,
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accountViewModel: AccountViewModel,
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nav: INav,
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) {
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val lifeCycleOwner = LocalLifecycleOwner.current
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val followSetsState by followSetsViewModel.feedState.feedContent.collectAsStateWithLifecycle()
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DisposableEffect(lifeCycleOwner) {
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val observer =
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LifecycleEventObserver { _, event ->
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if (event == Lifecycle.Event.ON_RESUME) {
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println("Custom Lists Start")
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followSetsViewModel.invalidateData()
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}
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}
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lifeCycleOwner.lifecycle.addObserver(observer)
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onDispose { lifeCycleOwner.lifecycle.removeObserver(observer) }
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}
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DisappearingScaffold(
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isInvertedLayout = false,
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accountViewModel = accountViewModel,
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topBar = {
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TopBarWithBackButton(stringRes(R.string.my_lists), nav::popBack)
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},
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) {
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when (followSetsState) {
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FeedState.Empty -> TODO()
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is FeedState.FeedError -> TODO()
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is FeedState.Loaded -> {
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FollowListLoaded(
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nostrSigner = accountViewModel.account.signer,
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loadedFeedState = followSetsState as FeedState.Loaded,
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)
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}
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FeedState.Loading -> TODO()
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}
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}
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}
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@Composable
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fun FollowListLoaded(
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modifier: Modifier = Modifier,
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nostrSigner: NostrSigner,
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loadedFeedState: FeedState.Loaded,
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) {
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val feedState by loadedFeedState.feed.collectAsState()
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val listState = rememberLazyListState()
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val followSetList = feedState.list.map { it.mapToFollowSet(nostrSigner) }
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LazyColumn(
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state = listState,
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contentPadding = FeedPadding,
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) {
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itemsIndexed(followSetList, key = { _, item -> item.title }) { index, set ->
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CustomListItem(followSet = set)
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}
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}
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}
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private fun Note.mapToFollowSet(nostrSigner: NostrSigner): FollowSet = FollowSet.mapEventToSet(event = this.event as PeopleListEvent, nostrSigner)
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@Composable
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fun CustomListItem(
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modifier: Modifier = Modifier,
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followSet: FollowSet,
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) {
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Row(
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modifier =
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modifier
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.border(
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width = Dp.Hairline,
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color = Color.Gray,
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shape = RoundedCornerShape(percent = 20),
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).padding(all = 10.dp),
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verticalAlignment = Alignment.CenterVertically,
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) {
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Column(
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modifier = modifier.weight(1f),
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verticalArrangement = Arrangement.Center,
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) {
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Text(followSet.title, fontWeight = FontWeight.Bold)
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Spacer(modifier = StdVertSpacer)
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Text(
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followSet.description ?: "No description for this list.",
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overflow = TextOverflow.Ellipsis,
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maxLines = 3,
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)
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}
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followSet.isPrivate.let {
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val text by derivedStateOf { if (it) "Private" else "Public" }
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Column(
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// modifier = modifier.weight(1f),
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verticalArrangement = Arrangement.Center,
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horizontalAlignment = Alignment.CenterHorizontally,
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) {
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Icon(
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painter =
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painterResource(
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if (followSet.isPrivate) R.drawable.incognito else R.drawable.ic_globe,
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),
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contentDescription = "Icon for $text List",
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)
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Text(text, color = Color.Gray)
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}
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}
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}
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}
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@Preview(showSystemUi = true)
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@Composable
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private fun ListItemPreview() {
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val sampleFollowSet =
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FollowSet(
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isPrivate = true,
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title = "Sample List Title",
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description = "Sample List Description",
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emptySet(),
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)
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ThemeComparisonColumn {
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CustomListItem(
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modifier = Modifier,
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sampleFollowSet,
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)
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}
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}
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