chat materials pagination and ui improvements

core/model/src/main/kotlin/dev/meloda/fast/model/api/data/VkAudioData.kt

@@ -27,7 +27,7 @@ data class VkAudioData(
         @Json(name = "title") val title: String,
         @Json(name = "owner_id") val ownerId: Int,
         @Json(name = "access_key") val accessKey: String,
-        @Json(name = "thumb") val thumb: Thumb
+        @Json(name = "thumb") val thumb: Thumb?
     ) {
 
         @JsonClass(generateAdapter = true)

core/model/src/main/kotlin/dev/meloda/fast/model/api/data/VkPhotoData.kt

@@ -1,22 +1,22 @@
 package dev.meloda.fast.model.api.data
 
-import dev.meloda.fast.model.api.domain.VkPhotoDomain
 import com.squareup.moshi.Json
 import com.squareup.moshi.JsonClass
+import dev.meloda.fast.model.api.domain.VkPhotoDomain
 
 @JsonClass(generateAdapter = true)
 data class VkPhotoData(
     @Json(name = "album_id") val albumId: Int,
-    val date: Int,
+    @Json(name = "date") val date: Int?,
-    val id: Int,
+    @Json(name = "id") val id: Int,
     @Json(name = "owner_id") val ownerId: Int,
-    @Json(name = "has_tags") val hasTags: Boolean,
+    @Json(name = "has_tags") val hasTags: Boolean?,
     @Json(name = "access_key") val accessKey: String?,
-    val sizes: List<Size>,
+    @Json(name = "sizes") val sizes: List<Size>,
-    val text: String?,
+    @Json(name = "text") val text: String?,
     @Json(name = "user_id") val userId: Int?,
-    val lat: Double?,
+    @Json(name = "lat") val lat: Double?,
-    val long: Double?,
+    @Json(name = "long") val long: Double?,
     @Json(name = "post_id") val postId: Int?
 ) : VkAttachmentData {
 
@@ -33,7 +33,7 @@ data class VkPhotoData(
         date = date,
         id = id,
         ownerId = ownerId,
-        hasTags = hasTags,
+        hasTags = hasTags == true,
         accessKey = accessKey,
         sizes = sizes,
         text = text,

core/model/src/main/kotlin/dev/meloda/fast/model/api/domain/VkPhotoDomain.kt

@@ -8,7 +8,7 @@ import java.util.Stack
 // TODO: 11/04/2024, Danil Nikolaev: review
 data class VkPhotoDomain(
     val albumId: Int,
-    val date: Int,
+    val date: Int?,
     val id: Int,
     val ownerId: Int,
     val hasTags: Boolean,

feature/chatmaterials/src/main/kotlin/dev/meloda/fast/chatmaterials/ChatMaterialsViewModel.kt

@@ -9,10 +9,12 @@ import dev.meloda.fast.chatmaterials.navigation.ChatMaterials
 import dev.meloda.fast.chatmaterials.util.asPresentation
 import dev.meloda.fast.common.extensions.listenValue
 import dev.meloda.fast.common.extensions.setValue
+import dev.meloda.fast.data.State
 import dev.meloda.fast.data.processState
 import dev.meloda.fast.domain.MessagesUseCase
 import dev.meloda.fast.model.BaseError
 import dev.meloda.fast.model.api.domain.VkAttachmentHistoryMessage
+import dev.meloda.fast.network.VkErrorCode
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.update
@@ -60,7 +62,7 @@ class ChatMaterialsViewModelImpl(
     }
 
     override fun onPaginationConditionsMet() {
-        currentOffset.update { screenState.value.materials.size }
+        currentOffset.setValue { old -> old + LOAD_COUNT }
         loadChatMaterials()
     }
 
@@ -86,20 +88,24 @@ class ChatMaterialsViewModelImpl(
             conversationMessageId = screenState.value.conversationMessageId
         ).listenValue(viewModelScope) { state ->
             state.processState(
-                error = { error ->
+                error = ::handleError,
-
-                },
                 success = { response ->
                     val itemsCountSufficient = response.size == LOAD_COUNT
                     canPaginate.setValue { itemsCountSufficient }
 
-                    val paginationExhausted = !itemsCountSufficient &&
+                    val paginationExhausted = !itemsCountSufficient
-                            screenState.value.materials.size >= LOAD_COUNT
+                            && screenState.value.materials.isNotEmpty()
 
-                    val loadedMaterials = response.map(VkAttachmentHistoryMessage::asPresentation)
+                    val loadedMaterials = response.mapNotNull(VkAttachmentHistoryMessage::asPresentation)
 
                     val newState = screenState.value.copy(
-                        isPaginationExhausted = paginationExhausted
+                        isPaginationExhausted = paginationExhausted,
+                        conversationMessageId = if (loadedMaterials.size + offset > 200) {
+                            currentOffset.setValue { 0 }
+                            loadedMaterials.lastOrNull()?.conversationMessageId ?: -1
+                        } else {
+                            screenState.value.conversationMessageId
+                        }
                     )
 
                     if (offset == 0) {
@@ -125,7 +131,45 @@ class ChatMaterialsViewModelImpl(
         }
     }
 
+    private fun handleError(error: State.Error) {
+        when (error) {
+            is State.Error.ApiError -> {
+                when (error.errorCode) {
+                    VkErrorCode.USER_AUTHORIZATION_FAILED -> {
+                        baseError.setValue { BaseError.SessionExpired }
+                    }
+
+                    else -> {
+                        baseError.setValue {
+                            BaseError.SimpleError(message = error.errorMessage)
+                        }
+                    }
+                }
+            }
+
+            State.Error.ConnectionError -> {
+                baseError.setValue {
+                    BaseError.SimpleError(message = "Connection error")
+                }
+            }
+
+            State.Error.InternalError -> {
+                baseError.setValue {
+                    BaseError.SimpleError(message = "Internal error")
+                }
+            }
+
+            State.Error.UnknownError -> {
+                baseError.setValue {
+                    BaseError.SimpleError(message = "Unknown error")
+                }
+            }
+
+            else -> Unit
+        }
+    }
+
     companion object {
-        const val LOAD_COUNT = 30
+        const val LOAD_COUNT = 200
     }
 }

feature/chatmaterials/src/main/kotlin/dev/meloda/fast/chatmaterials/model/UiChatMaterial.kt

@@ -1,36 +1,43 @@
 package dev.meloda.fast.chatmaterials.model
 
-sealed class UiChatMaterial {
+sealed class UiChatMaterial(
+    open val conversationMessageId: Int
+) {
 
     data class Photo(
+        override val conversationMessageId: Int,
         val previewUrl: String
-    ) : UiChatMaterial()
+    ) : UiChatMaterial(conversationMessageId)
 
     data class Video(
+        override val conversationMessageId: Int,
         val previewUrl: String?,
         val title: String,
         val views: Int,
         val duration: String
-    ) : UiChatMaterial()
+    ) : UiChatMaterial(conversationMessageId)
 
     data class Audio(
+        override val conversationMessageId: Int,
         val previewUrl: String?,
         val title: String,
         val artist: String,
         val duration: String
-    ) : UiChatMaterial()
+    ) : UiChatMaterial(conversationMessageId)
 
     data class File(
+        override val conversationMessageId: Int,
         val previewUrl: String?,
         val title: String,
         val size: String,
         val extension: String
-    ) : UiChatMaterial()
+    ) : UiChatMaterial(conversationMessageId)
 
     data class Link(
+        override val conversationMessageId: Int,
         val previewUrl: String?,
         val title: String?,
         val url: String,
         val urlFirstChar: String
-    ) : UiChatMaterial()
+    ) : UiChatMaterial(conversationMessageId)
 }

feature/chatmaterials/src/main/kotlin/dev/meloda/fast/chatmaterials/presentation/ChatMaterialsScreen.kt

@@ -17,9 +17,11 @@ import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.PrimaryTabRow
 import androidx.compose.material3.Scaffold
+import androidx.compose.material3.ScrollableTabRow
 import androidx.compose.material3.Tab
+import androidx.compose.material3.TabRowDefaults
+import androidx.compose.material3.TabRowDefaults.tabIndicatorOffset
 import androidx.compose.material3.Text
 import androidx.compose.material3.TopAppBar
 import androidx.compose.material3.TopAppBarDefaults
@@ -171,10 +173,17 @@ fun ChatMaterialsScreen(
                         }
                     }
                 )
-                PrimaryTabRow(
+                ScrollableTabRow(
                     modifier = Modifier.fillMaxWidth(),
                     selectedTabIndex = selectedTabIndex,
-                    containerColor = Color.Transparent
+                    containerColor = Color.Transparent,
+                    edgePadding = 0.dp,
+                    indicator = { tabPositions ->
+                        TabRowDefaults.PrimaryIndicator(
+                            modifier = Modifier.tabIndicatorOffset(tabPositions[selectedTabIndex]),
+                            color = MaterialTheme.colorScheme.primary
+                        )
+                    }
                 ) {
                     tabItems.forEachIndexed { index, item ->
                         Tab(

feature/chatmaterials/src/main/kotlin/dev/meloda/fast/chatmaterials/presentation/materials/FileMaterialsScreen.kt

@@ -19,7 +19,13 @@ import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.rounded.KeyboardArrowUp
+import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.IconButtonDefaults
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.material3.pulltorefresh.PullToRefreshBox
@@ -28,9 +34,11 @@ import androidx.compose.material3.pulltorefresh.rememberPullToRefreshState
 import androidx.compose.material3.surfaceColorAtElevation
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
 import androidx.compose.runtime.snapshotFlow
 import androidx.compose.ui.Alignment
@@ -60,6 +68,8 @@ import dev.meloda.fast.ui.components.FullScreenLoader
 import dev.meloda.fast.ui.components.NoItemsView
 import dev.meloda.fast.ui.theme.LocalHazeState
 import dev.meloda.fast.ui.theme.LocalThemeConfig
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -74,6 +84,7 @@ fun FileMaterialsScreen(
     setCanScrollBackward: (Boolean) -> Unit,
     onPaginationConditionsMet: () -> Unit
 ) {
+    val coroutineScope = rememberCoroutineScope()
     val hazeState = LocalHazeState.current
     val currentTheme = LocalThemeConfig.current
     val listState = rememberLazyListState()
@@ -84,6 +95,20 @@ fun FileMaterialsScreen(
             .collect(setCanScrollBackward)
     }
 
+    val paginationConditionMet by remember(canPaginate, listState) {
+        derivedStateOf {
+            canPaginate &&
+                    (listState.layoutInfo.visibleItemsInfo.lastOrNull()?.index
+                        ?: -9) >= (listState.layoutInfo.totalItemsCount - 6)
+        }
+    }
+
+    LaunchedEffect(paginationConditionMet) {
+        if (paginationConditionMet && !screenState.isPaginating) {
+            onPaginationConditionsMet()
+        }
+    }
+
     when {
         baseError != null -> {
             when (baseError) {
@@ -207,6 +232,37 @@ fun FileMaterialsScreen(
                             }
                         }
                     }
+                    item {
+                        Column(
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .animateItem(fadeInSpec = null, fadeOutSpec = null),
+                            horizontalAlignment = Alignment.CenterHorizontally
+                        ) {
+                            if (screenState.isPaginating) {
+                                CircularProgressIndicator()
+                            }
+
+                            if (screenState.isPaginationExhausted) {
+                                IconButton(
+                                    onClick = {
+                                        coroutineScope.launch(Dispatchers.Main) {
+                                            listState.scrollToItem(14)
+                                            listState.animateScrollToItem(0)
+                                        }
+                                    },
+                                    colors = IconButtonDefaults.filledIconButtonColors()
+                                ) {
+                                    Icon(
+                                        imageVector = Icons.Rounded.KeyboardArrowUp,
+                                        contentDescription = null
+                                    )
+                                }
+                            }
+
+                            Spacer(modifier = Modifier.height(8.dp))
+                        }
+                    }
                     item {
                         Spacer(modifier = Modifier.height(padding.calculateBottomPadding()))
                     }

feature/chatmaterials/src/main/kotlin/dev/meloda/fast/chatmaterials/presentation/materials/LinkMaterialsScreen.kt

@@ -19,7 +19,13 @@ import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.rounded.KeyboardArrowUp
+import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.IconButtonDefaults
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.material3.pulltorefresh.PullToRefreshBox
@@ -28,9 +34,11 @@ import androidx.compose.material3.pulltorefresh.rememberPullToRefreshState
 import androidx.compose.material3.surfaceColorAtElevation
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
 import androidx.compose.runtime.snapshotFlow
 import androidx.compose.ui.Alignment
@@ -60,6 +68,8 @@ import dev.meloda.fast.ui.components.FullScreenLoader
 import dev.meloda.fast.ui.components.NoItemsView
 import dev.meloda.fast.ui.theme.LocalHazeState
 import dev.meloda.fast.ui.theme.LocalThemeConfig
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -74,6 +84,7 @@ fun LinkMaterialsScreen(
     setCanScrollBackward: (Boolean) -> Unit,
     onPaginationConditionsMet: () -> Unit
 ) {
+    val coroutineScope = rememberCoroutineScope()
     val hazeState = LocalHazeState.current
     val currentTheme = LocalThemeConfig.current
     val listState = rememberLazyListState()
@@ -84,6 +95,20 @@ fun LinkMaterialsScreen(
             .collect(setCanScrollBackward)
     }
 
+    val paginationConditionMet by remember(canPaginate, listState) {
+        derivedStateOf {
+            canPaginate &&
+                    (listState.layoutInfo.visibleItemsInfo.lastOrNull()?.index
+                        ?: -9) >= (listState.layoutInfo.totalItemsCount - 6)
+        }
+    }
+
+    LaunchedEffect(paginationConditionMet) {
+        if (paginationConditionMet && !screenState.isPaginating) {
+            onPaginationConditionsMet()
+        }
+    }
+
     when {
         baseError != null -> {
             when (baseError) {
@@ -226,6 +251,37 @@ fun LinkMaterialsScreen(
                             }
                         }
                     }
+                    item {
+                        Column(
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .animateItem(fadeInSpec = null, fadeOutSpec = null),
+                            horizontalAlignment = Alignment.CenterHorizontally
+                        ) {
+                            if (screenState.isPaginating) {
+                                CircularProgressIndicator()
+                            }
+
+                            if (screenState.isPaginationExhausted) {
+                                IconButton(
+                                    onClick = {
+                                        coroutineScope.launch(Dispatchers.Main) {
+                                            listState.scrollToItem(14)
+                                            listState.animateScrollToItem(0)
+                                        }
+                                    },
+                                    colors = IconButtonDefaults.filledIconButtonColors()
+                                ) {
+                                    Icon(
+                                        imageVector = Icons.Rounded.KeyboardArrowUp,
+                                        contentDescription = null
+                                    )
+                                }
+                            }
+
+                            Spacer(modifier = Modifier.height(8.dp))
+                        }
+                    }
                     item {
                         Spacer(modifier = Modifier.height(padding.calculateBottomPadding()))
                     }

feature/chatmaterials/src/main/kotlin/dev/meloda/fast/chatmaterials/presentation/materials/PhotoMaterialsScreen.kt

@@ -2,6 +2,7 @@ package dev.meloda.fast.chatmaterials.presentation.materials
 
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.aspectRatio
@@ -12,15 +13,26 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.grid.GridCells
+import androidx.compose.foundation.lazy.grid.GridItemSpan
 import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
 import androidx.compose.foundation.lazy.grid.items
 import androidx.compose.foundation.lazy.grid.rememberLazyGridState
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.rounded.KeyboardArrowUp
+import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.IconButtonDefaults
 import androidx.compose.material3.pulltorefresh.PullToRefreshBox
 import androidx.compose.material3.pulltorefresh.PullToRefreshDefaults
 import androidx.compose.material3.pulltorefresh.rememberPullToRefreshState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.derivedStateOf
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.snapshotFlow
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -39,6 +51,8 @@ import dev.meloda.fast.ui.components.FullScreenLoader
 import dev.meloda.fast.ui.components.NoItemsView
 import dev.meloda.fast.ui.theme.LocalHazeState
 import dev.meloda.fast.ui.theme.LocalThemeConfig
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -54,6 +68,7 @@ fun PhotoMaterialsScreen(
     onPhotoClicked: (String) -> Unit,
     onPaginationConditionsMet: () -> Unit
 ) {
+    val coroutineScope = rememberCoroutineScope()
     val hazeState = LocalHazeState.current
     val currentTheme = LocalThemeConfig.current
     val gridState = rememberLazyGridState()
@@ -64,6 +79,20 @@ fun PhotoMaterialsScreen(
             .collect(setCanScrollBackward)
     }
 
+    val paginationConditionMet by remember(canPaginate, gridState) {
+        derivedStateOf {
+            canPaginate &&
+                    (gridState.layoutInfo.visibleItemsInfo.lastOrNull()?.index
+                        ?: -9) >= (gridState.layoutInfo.totalItemsCount - 6)
+        }
+    }
+
+    LaunchedEffect(paginationConditionMet) {
+        if (paginationConditionMet && !screenState.isPaginating) {
+            onPaginationConditionsMet()
+        }
+    }
+
     when {
         baseError != null -> {
             when (baseError) {
@@ -121,11 +150,9 @@ fun PhotoMaterialsScreen(
                         .fillMaxSize()
 
                 ) {
-                    repeat(3) {
+                    item(span = { GridItemSpan(3) }) {
-                        item {
                         Spacer(modifier = Modifier.height(padding.calculateTopPadding()))
                     }
-                    }
                     items(items = screenState.materials) { item ->
                         item as UiChatMaterial.Photo
                         AsyncImage(
@@ -142,10 +169,45 @@ fun PhotoMaterialsScreen(
                                 )
                         )
                     }
-                    repeat(3) {
+                    item(span = { GridItemSpan(3) }) {
+                        Column(
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .animateItem(fadeInSpec = null, fadeOutSpec = null),
+                            horizontalAlignment = Alignment.CenterHorizontally,
+                            verticalArrangement = Arrangement.Center
+                        ) {
+                            if (screenState.isPaginating) {
+                                CircularProgressIndicator()
+                            }
+
+                            if (screenState.isPaginationExhausted) {
+                                Spacer(modifier = Modifier.height(32.dp))
+
+                                IconButton(
+                                    onClick = {
+                                        coroutineScope.launch(Dispatchers.Main) {
+                                            gridState.scrollToItem(14)
+                                            gridState.animateScrollToItem(0)
+                                        }
+                                    },
+                                    colors = IconButtonDefaults.filledIconButtonColors()
+                                ) {
+                                    Icon(
+                                        imageVector = Icons.Rounded.KeyboardArrowUp,
+                                        contentDescription = null
+                                    )
+                                }
+                            }
+
+                            Spacer(modifier = Modifier.height(8.dp))
+                        }
+                    }
                     item {
                         Spacer(modifier = Modifier.height(padding.calculateBottomPadding()))
                     }
+                    item(span = { GridItemSpan(3) }) {
+                        Spacer(modifier = Modifier.height(padding.calculateBottomPadding()))
                     }
                 }
 

feature/chatmaterials/src/main/kotlin/dev/meloda/fast/chatmaterials/presentation/materials/VideoMaterialsScreen.kt

@@ -19,7 +19,13 @@ import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.rounded.KeyboardArrowUp
+import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.IconButtonDefaults
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.material3.pulltorefresh.PullToRefreshBox
@@ -27,6 +33,10 @@ import androidx.compose.material3.pulltorefresh.PullToRefreshDefaults
 import androidx.compose.material3.pulltorefresh.rememberPullToRefreshState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.derivedStateOf
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.snapshotFlow
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -51,6 +61,8 @@ import dev.meloda.fast.ui.components.FullScreenLoader
 import dev.meloda.fast.ui.components.NoItemsView
 import dev.meloda.fast.ui.theme.LocalHazeState
 import dev.meloda.fast.ui.theme.LocalThemeConfig
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -65,6 +77,7 @@ fun VideoMaterialsScreen(
     setCanScrollBackward: (Boolean) -> Unit,
     onPaginationConditionsMet: () -> Unit
 ) {
+    val coroutineScope = rememberCoroutineScope()
     val hazeState = LocalHazeState.current
     val currentTheme = LocalThemeConfig.current
     val listState = rememberLazyListState()
@@ -75,6 +88,20 @@ fun VideoMaterialsScreen(
             .collect(setCanScrollBackward)
     }
 
+    val paginationConditionMet by remember(canPaginate, listState) {
+        derivedStateOf {
+            canPaginate &&
+                    (listState.layoutInfo.visibleItemsInfo.lastOrNull()?.index
+                        ?: -9) >= (listState.layoutInfo.totalItemsCount - 6)
+        }
+    }
+
+    LaunchedEffect(paginationConditionMet) {
+        if (paginationConditionMet && !screenState.isPaginating) {
+            onPaginationConditionsMet()
+        }
+    }
+
     when {
         baseError != null -> {
             when (baseError) {
@@ -197,6 +224,37 @@ fun VideoMaterialsScreen(
                             }
                         }
                     }
+                    item {
+                        Column(
+                            modifier = Modifier
+                                .fillMaxWidth()
+                                .animateItem(fadeInSpec = null, fadeOutSpec = null),
+                            horizontalAlignment = Alignment.CenterHorizontally
+                        ) {
+                            if (screenState.isPaginating) {
+                                CircularProgressIndicator()
+                            }
+
+                            if (screenState.isPaginationExhausted) {
+                                IconButton(
+                                    onClick = {
+                                        coroutineScope.launch(Dispatchers.Main) {
+                                            listState.scrollToItem(14)
+                                            listState.animateScrollToItem(0)
+                                        }
+                                    },
+                                    colors = IconButtonDefaults.filledIconButtonColors()
+                                ) {
+                                    Icon(
+                                        imageVector = Icons.Rounded.KeyboardArrowUp,
+                                        contentDescription = null
+                                    )
+                                }
+                            }
+
+                            Spacer(modifier = Modifier.height(8.dp))
+                        }
+                    }
                     item {
                         Spacer(modifier = Modifier.height(padding.calculateBottomPadding()))
                     }

feature/chatmaterials/src/main/kotlin/dev/meloda/fast/chatmaterials/util/ChatMaterialMapper.kt

@@ -1,5 +1,6 @@
 package dev.meloda.fast.chatmaterials.util
 
+import android.util.Log
 import dev.meloda.fast.chatmaterials.model.UiChatMaterial
 import dev.meloda.fast.common.util.AndroidUtils
 import dev.meloda.fast.model.api.data.AttachmentType
@@ -11,11 +12,12 @@ import dev.meloda.fast.model.api.domain.VkPhotoDomain
 import dev.meloda.fast.model.api.domain.VkVideoDomain
 import java.util.Locale
 
-fun VkAttachmentHistoryMessage.asPresentation(): UiChatMaterial =
+fun VkAttachmentHistoryMessage.asPresentation(): UiChatMaterial? =
     when (val type = this.attachment.type) {
         AttachmentType.PHOTO -> {
             val attachment = this.attachment as VkPhotoDomain
             UiChatMaterial.Photo(
+                conversationMessageId = this.conversationMessageId,
                 previewUrl = attachment.getSizeOrSmaller(VkPhotoDomain.SIZE_TYPE_1080_1024)?.url.orEmpty()
             )
         }
@@ -45,6 +47,7 @@ fun VkAttachmentHistoryMessage.asPresentation(): UiChatMaterial =
                 builder.toString().format(Locale.getDefault(), *args.toTypedArray())
 
             UiChatMaterial.Video(
+                conversationMessageId = this.conversationMessageId,
                 previewUrl = attachment.images.maxByOrNull(VkVideoDomain.VideoImage::width)?.url.orEmpty(),
                 title = attachment.title,
                 views = attachment.views,
@@ -77,6 +80,7 @@ fun VkAttachmentHistoryMessage.asPresentation(): UiChatMaterial =
                 builder.toString().format(Locale.getDefault(), *args.toTypedArray())
 
             UiChatMaterial.Audio(
+                conversationMessageId = this.conversationMessageId,
                 previewUrl = null,
                 title = attachment.title,
                 artist = attachment.artist,
@@ -108,6 +112,7 @@ fun VkAttachmentHistoryMessage.asPresentation(): UiChatMaterial =
             }
 
             UiChatMaterial.File(
+                conversationMessageId = this.conversationMessageId,
                 title = attachment.title,
                 previewUrl = previewUrl,
                 size = AndroidUtils.bytesToHumanReadableSize(attachment.size.toDouble()),
@@ -119,6 +124,7 @@ fun VkAttachmentHistoryMessage.asPresentation(): UiChatMaterial =
             val attachment = this.attachment as VkLinkDomain
 
             UiChatMaterial.Link(
+                conversationMessageId = this.conversationMessageId,
                 title = attachment.title,
                 previewUrl = attachment.photo?.getMaxSize()?.url,
                 url = attachment.url,
@@ -129,5 +135,8 @@ fun VkAttachmentHistoryMessage.asPresentation(): UiChatMaterial =
             )
         }
 
-        else -> throw IllegalArgumentException("Unsupported type: $type")
+        else -> {
+            Log.w("ChatMaterialMapper", "Unsupported type: $type")
+            null
+        }
     }

feature/conversations/src/main/kotlin/dev/meloda/fast/conversations/presentation/ConversationsScreen.kt

@@ -3,6 +3,7 @@ package dev.meloda.fast.conversations.presentation
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.animateColorAsState
 import androidx.compose.animation.core.animateFloatAsState
+import androidx.compose.animation.core.animateIntAsState
 import androidx.compose.animation.core.tween
 import androidx.compose.animation.fadeIn
 import androidx.compose.animation.fadeOut
@@ -17,6 +18,7 @@ import androidx.compose.foundation.layout.defaultMinSize
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.offset
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.statusBars
 import androidx.compose.foundation.lazy.rememberLazyListState
@@ -51,7 +53,6 @@ import androidx.compose.runtime.setValue
 import androidx.compose.runtime.snapshotFlow
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalView
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextOverflow
@@ -277,19 +278,28 @@ fun ConversationsScreen(
             }
         },
         floatingActionButton = {
+            val offsetY by animateIntAsState(
+                targetValue = if (listState.isScrollingUp()) 0 else 600
+            )
+
             Column {
-                AnimatedVisibility(
+//                AnimatedVisibility(
-                    visible = listState.isScrollingUp(),
+//                    visible = listState.isScrollingUp(),
-                    enter = slideIn { IntOffset(0, 600) } + fadeIn(tween(200)),
+//                    enter = slideIn { IntOffset(0, 600) } + fadeIn(tween(200)),
-                    exit = slideOut { IntOffset(0, 600) } + fadeOut(tween(200))
+//                    exit = slideOut { IntOffset(0, 600) } + fadeOut(tween(200))
+//                ) {
+                    FloatingActionButton(
+                        onClick = onCreateChatButtonClicked,
+                        modifier = Modifier.offset {
+                            IntOffset(0, offsetY)
+                        }
                     ) {
-                    FloatingActionButton(onClick = onCreateChatButtonClicked) {
                         Icon(
                             painter = painterResource(id = UiR.drawable.ic_baseline_create_24),
                             contentDescription = "Add chat button"
                         )
                     }
-                }
+//                }
 
                 Spacer(modifier = Modifier.height(LocalBottomPadding.current))
             }

feature/friends/src/main/kotlin/dev/meloda/fast/friends/FriendsViewModel.kt

@@ -157,8 +157,8 @@ class FriendsViewModelImpl(
                     val itemsCountSufficient = response.size == LOAD_COUNT
                     canPaginate.setValue { itemsCountSufficient }
 
-                    val paginationExhausted = !itemsCountSufficient &&
+                    val paginationExhausted = !itemsCountSufficient
-                            screenState.value.friends.size >= LOAD_COUNT
+                            && screenState.value.friends.isNotEmpty()
 
                     imagesToPreload.setValue {
                         response.mapNotNull(VkUser::photo100)