Implement paywall on media feeds grid

app/src/main/kotlin/net/primal/android/articles/feed/ArticleFeedViewModel.kt

@@ -17,6 +17,7 @@ import net.primal.android.articles.ArticleRepository
 import net.primal.android.articles.feed.ArticleFeedContract.UiState
 import net.primal.android.articles.feed.ui.mapAsFeedArticleUi
 import net.primal.android.feeds.domain.isPremiumFeedSpec
+import net.primal.android.premium.utils.hasPremiumMembership
 import net.primal.android.user.accounts.active.ActiveAccountStore
 
 @HiltViewModel(assistedFactory = ArticleFeedViewModel.Factory::class)
@@ -47,9 +48,8 @@ class ArticleFeedViewModel @AssistedInject constructor(
     private fun observeActiveAccount() {
         viewModelScope.launch {
             activeAccountStore.activeUserAccount.collect {
-                val hasPremiumMembership = it.premiumMembership?.isExpired() == false
                 setState {
-                    copy(paywall = spec.isPremiumFeedSpec() && !hasPremiumMembership)
+                    copy(paywall = spec.isPremiumFeedSpec() && !it.hasPremiumMembership())
                 }
             }
         }

app/src/main/kotlin/net/primal/android/explore/feed/ExploreFeedScreen.kt

@@ -229,6 +229,7 @@ private fun ExploreNoteFeed(
                 feedSpec = feedSpec,
                 contentPadding = contentPadding,
                 onNoteClick = { noteCallbacks.onNoteClick?.invoke(it) },
+                onGetPrimalPremiumClick = { noteCallbacks.onGetPrimalPremiumClick?.invoke() },
             )
         }
     }

app/src/main/kotlin/net/primal/android/explore/home/ExploreHomeScreen.kt

@@ -203,6 +203,7 @@ private fun ExploreHomeScreen(
                             feedSpec = exploreMediaFeedSpec,
                             contentPadding = paddingValues,
                             onNoteClick = { noteCallbacks.onNoteClick?.invoke(it) },
+                            onGetPrimalPremiumClick = { noteCallbacks.onGetPrimalPremiumClick?.invoke() },
                         )
                     }
 

app/src/main/kotlin/net/primal/android/notes/feed/grid/MediaFeedContract.kt

@@ -8,5 +8,6 @@ interface MediaFeedContract {
 
     data class UiState(
         val notes: Flow<PagingData<FeedPostUi>>,
+        val paywall: Boolean = false,
     )
 }

app/src/main/kotlin/net/primal/android/notes/feed/grid/MediaFeedGrid.kt

@@ -8,6 +8,7 @@ import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.lazy.grid.GridCells
+import androidx.compose.foundation.lazy.grid.GridItemSpan
 import androidx.compose.foundation.lazy.grid.LazyGridState
 import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
 import androidx.compose.foundation.lazy.grid.rememberLazyGridState
@@ -25,14 +26,19 @@ import androidx.paging.compose.itemKey
 import net.primal.android.R
 import net.primal.android.core.compose.GridLoadingPlaceholder
 import net.primal.android.core.compose.ListNoContent
+import net.primal.android.core.compose.PremiumFeedPaywall
 import net.primal.android.core.compose.isEmpty
 import net.primal.android.notes.feed.model.FeedPostUi
 import timber.log.Timber
 
+const val MAX_NOTES_BEFORE_PAYWALL = 25
+const val PAYWALL_COLUMN_SPAN = 3
+
 @Composable
 fun MediaFeedGrid(
     feedSpec: String,
     onNoteClick: (String) -> Unit,
+    onGetPrimalPremiumClick: () -> Unit,
     modifier: Modifier = Modifier,
     gridState: LazyGridState = rememberLazyGridState(),
     contentPadding: PaddingValues = PaddingValues(0.dp),
@@ -49,6 +55,7 @@ fun MediaFeedGrid(
     MediaFeedGrid(
         state = uiState.value,
         onNoteClick = onNoteClick,
+        onGetPrimalPremiumClick = onGetPrimalPremiumClick,
         gridState = gridState,
         modifier = modifier,
         contentPadding = contentPadding,
@@ -62,6 +69,7 @@ private fun MediaFeedGrid(
     modifier: Modifier = Modifier,
     state: MediaFeedContract.UiState,
     onNoteClick: (String) -> Unit,
+    onGetPrimalPremiumClick: () -> Unit,
     gridState: LazyGridState = rememberLazyGridState(),
     contentPadding: PaddingValues = PaddingValues(0.dp),
     noContentVerticalArrangement: Arrangement.Vertical = Arrangement.Center,
@@ -86,7 +94,7 @@ private fun MediaFeedGrid(
                 contentPadding = contentPadding,
             ) {
                 items(
-                    count = pagingItems.itemCount,
+                    count = pagingItems.itemCount.ifPaywallCoerceAtMost(state.paywall),
                     key = pagingItems.itemKey(key = { "${it.postId}${it.repostId}" }),
                     contentType = pagingItems.itemContentType(),
                 ) { index ->
@@ -108,6 +116,9 @@ private fun MediaFeedGrid(
                         else -> {}
                     }
                 }
+                item(span = { GridItemSpan(PAYWALL_COLUMN_SPAN) }) {
+                    PremiumFeedPaywall(onClick = onGetPrimalPremiumClick)
+                }
             }
         }
     }
@@ -153,3 +164,6 @@ private fun EmptyItemsContent(
         }
     }
 }
+
+private fun Int.ifPaywallCoerceAtMost(paywall: Boolean) =
+    run { if (paywall) this.coerceAtMost(MAX_NOTES_BEFORE_PAYWALL) else this }

app/src/main/kotlin/net/primal/android/notes/feed/grid/MediaFeedViewModel.kt

@@ -10,15 +10,21 @@ import dagger.assisted.AssistedInject
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.getAndUpdate
 import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.launch
+import net.primal.android.feeds.domain.isPremiumFeedSpec
 import net.primal.android.notes.feed.grid.MediaFeedContract.UiState
 import net.primal.android.notes.feed.model.asFeedPostUi
 import net.primal.android.notes.repository.FeedRepository
+import net.primal.android.premium.utils.hasPremiumMembership
+import net.primal.android.user.accounts.active.ActiveAccountStore
 
 @HiltViewModel(assistedFactory = MediaFeedViewModel.Factory::class)
 class MediaFeedViewModel @AssistedInject constructor(
     @Assisted private val feedSpec: String,
     private val feedRepository: FeedRepository,
+    private val activeAccountStore: ActiveAccountStore,
 ) : ViewModel() {
 
     @AssistedFactory
@@ -33,4 +39,16 @@ class MediaFeedViewModel @AssistedInject constructor(
 
     private val _state = MutableStateFlow(UiState(notes = buildFeedByDirective(feedSpec = feedSpec)))
     val state = _state.asStateFlow()
+    private fun setState(reducer: UiState.() -> UiState) = _state.getAndUpdate { it.reducer() }
+
+    init {
+        observeActiveAccount()
+    }
+
+    private fun observeActiveAccount() =
+        viewModelScope.launch {
+            activeAccountStore.activeUserAccount.collect {
+                setState { copy(paywall = feedSpec.isPremiumFeedSpec() && !it.hasPremiumMembership()) }
+            }
+        }
 }

app/src/main/kotlin/net/primal/android/notes/feed/list/NoteFeedViewModel.kt

@@ -39,6 +39,7 @@ import net.primal.android.notes.feed.list.NoteFeedContract.UiState
 import net.primal.android.notes.feed.model.FeedPostsSyncStats
 import net.primal.android.notes.feed.model.asFeedPostUi
 import net.primal.android.notes.repository.FeedRepository
+import net.primal.android.premium.utils.hasPremiumMembership
 import net.primal.android.user.accounts.active.ActiveAccountStore
 import timber.log.Timber
 
@@ -79,9 +80,8 @@ class NoteFeedViewModel @AssistedInject constructor(
     private fun observeActiveAccount() {
         viewModelScope.launch {
             activeAccountStore.activeUserAccount.collect {
-                val hasPremiumMembership = it.premiumMembership?.isExpired() == false
                 setState {
-                    copy(paywall = feedSpec.isPremiumFeedSpec() && !hasPremiumMembership)
+                    copy(paywall = feedSpec.isPremiumFeedSpec() && !it.hasPremiumMembership())
                 }
             }
         }

app/src/main/kotlin/net/primal/android/premium/utils/PremiumUtils.kt

@@ -1,7 +1,13 @@
 package net.primal.android.premium.utils
 
+import net.primal.android.premium.domain.PremiumMembership
+import net.primal.android.user.domain.UserAccount
+
 fun String?.isPrimalLegend() = this?.lowercase() == "primal legend"
 fun String?.isPremiumFree() = this?.lowercase() == "free"
 fun String?.isOriginAndroid() = this?.lowercase() == "android"
 fun String?.isOriginIOS() = this?.lowercase() == "ios"
 fun String?.isOriginWeb() = this?.lowercase() == "web"
+
+fun PremiumMembership.hasPremiumMembership() = !this.isExpired()
+fun UserAccount.hasPremiumMembership() = this.premiumMembership?.hasPremiumMembership() == true

app/src/main/kotlin/net/primal/android/profile/details/ui/ProfileDetailsScreen.kt

@@ -523,6 +523,9 @@ fun ProfileDetailsScreen(
                                             onNoteClick = { naddr -> noteCallbacks.onNoteClick?.let { it(naddr) } },
                                             noContentVerticalArrangement = Arrangement.Top,
                                             noContentPaddingValues = PaddingValues(top = 16.dp),
+                                            onGetPrimalPremiumClick = {
+                                                noteCallbacks.onGetPrimalPremiumClick?.invoke()
+                                            },
                                         )
                                     }
                                 }