compact filter row with bottom sheet for source/follows/sort

Replaces the two-row, mixed-control filter UI under the search bar with a
single segmented row for scope (All/People/Notes) and a Tune icon button
that opens a ModalBottomSheet containing Source, Follows-only, and Sort
controls. A primary-color dot on the icon indicates non-default filter
state.

Also renames SearchSortOrder.DEFAULT_EVENT/DEFAULT_PEOPLE to
EVENT_DEFAULT/PEOPLE_DEFAULT for consistency with EVENT_OPTIONS/
PEOPLE_OPTIONS, and routes the sheet's reset button through these
canonical constants so the UI default cannot drift from the ViewModel.

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/search/SearchBarViewModel.kt

@@ -89,7 +89,7 @@ class SearchBarViewModel(
     val scope = MutableStateFlow(SearchScope.ALL)
     val source = MutableStateFlow(SearchSource.RELAYS)
     val followsOnly = MutableStateFlow(false)
-    val sortOrder = MutableStateFlow(SearchSortOrder.DEFAULT_EVENT)
+    val sortOrder = MutableStateFlow(SearchSortOrder.EVENT_DEFAULT)
 
     val searchTerm =
         searchValueFlow

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/search/SearchScreen.kt

@@ -20,33 +20,43 @@
  */
 package com.vitorpamplona.amethyst.ui.screen.loggedIn.search
 
+import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.defaultMinSize
 import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.offset
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.statusBarsPadding
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.foundation.selection.selectable
+import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.text.KeyboardOptions
-import androidx.compose.material3.DropdownMenu
-import androidx.compose.material3.DropdownMenuItem
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.outlined.Tune
 import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.FilterChip
 import androidx.compose.material3.HorizontalDivider
+import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.ModalBottomSheet
+import androidx.compose.material3.RadioButton
 import androidx.compose.material3.SegmentedButton
 import androidx.compose.material3.SegmentedButtonDefaults
 import androidx.compose.material3.SingleChoiceSegmentedButtonRow
+import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
 import androidx.compose.material3.TextButton
 import androidx.compose.material3.TextField
 import androidx.compose.material3.TextFieldDefaults
+import androidx.compose.material3.rememberModalBottomSheetState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
@@ -189,6 +199,21 @@ private fun SearchBar(
     }
 }
 
+// Must match SearchBarViewModel.source's initial value.
+private val DEFAULT_SOURCE = SearchSource.RELAYS
+
+private fun hasNonDefaultFilters(
+    scope: SearchScope,
+    source: SearchSource,
+    followsOnly: Boolean,
+    sort: SearchSortOrder,
+): Boolean {
+    if (source != DEFAULT_SOURCE) return true
+    if (followsOnly) return true
+    if (scope != SearchScope.PEOPLE && sort != SearchSortOrder.EVENT_DEFAULT) return true
+    return false
+}
+
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 private fun SearchFilterRow(searchBarViewModel: SearchBarViewModel) {
@@ -197,6 +222,8 @@ private fun SearchFilterRow(searchBarViewModel: SearchBarViewModel) {
     val currentFollowsOnly by searchBarViewModel.followsOnly.collectAsStateWithLifecycle()
     val currentSort by searchBarViewModel.sortOrder.collectAsStateWithLifecycle()
 
+    var sheetOpen by remember { mutableStateOf(false) }
+
     Row(
         modifier =
             Modifier
@@ -225,95 +252,186 @@ private fun SearchFilterRow(searchBarViewModel: SearchBarViewModel) {
             }
         }
 
-        SortMenu(
-            currentSort = currentSort,
-            enabled = currentScope != SearchScope.PEOPLE,
-            onSelect = { searchBarViewModel.updateSortOrder(it) },
+        FilterIconButton(
+            hasBadge =
+                hasNonDefaultFilters(
+                    scope = currentScope,
+                    source = currentSource,
+                    followsOnly = currentFollowsOnly,
+                    sort = currentSort,
+                ),
+            onClick = { sheetOpen = true },
         )
     }
 
-    Row(
-        modifier =
-            Modifier
-                .fillMaxWidth()
-                .padding(horizontal = 10.dp, vertical = 4.dp),
-        verticalAlignment = Alignment.CenterVertically,
-        horizontalArrangement = Arrangement.spacedBy(8.dp),
-    ) {
-        SingleChoiceSegmentedButtonRow {
-            val sources = listOf(SearchSource.LOCAL, SearchSource.RELAYS)
-            sources.forEachIndexed { index, s ->
-                SegmentedButton(
-                    selected = currentSource == s,
-                    onClick = { searchBarViewModel.updateSource(s) },
-                    shape = SegmentedButtonDefaults.itemShape(index = index, count = sources.size),
-                ) {
-                    Text(
-                        text =
-                            when (s) {
-                                SearchSource.LOCAL -> stringRes(R.string.search_source_local)
-                                SearchSource.RELAYS -> stringRes(R.string.search_source_relays)
-                            },
-                    )
-                }
-            }
-        }
-
-        FilterChip(
-            selected = currentFollowsOnly,
-            onClick = { searchBarViewModel.updateFollowsOnly(!currentFollowsOnly) },
-            label = { Text(stringRes(R.string.search_follows_only)) },
+    if (sheetOpen) {
+        SearchFiltersSheet(
+            scope = currentScope,
+            source = currentSource,
+            followsOnly = currentFollowsOnly,
+            sort = currentSort,
+            onSourceChange = searchBarViewModel::updateSource,
+            onFollowsOnlyChange = searchBarViewModel::updateFollowsOnly,
+            onSortChange = searchBarViewModel::updateSortOrder,
+            onReset = {
+                searchBarViewModel.updateSource(DEFAULT_SOURCE)
+                searchBarViewModel.updateFollowsOnly(false)
+                searchBarViewModel.updateSortOrder(SearchSortOrder.EVENT_DEFAULT)
+            },
+            onDismiss = { sheetOpen = false },
         )
     }
 }
 
 @Composable
-private fun SortMenu(
-    currentSort: SearchSortOrder,
-    enabled: Boolean,
-    onSelect: (SearchSortOrder) -> Unit,
+private fun FilterIconButton(
+    hasBadge: Boolean,
+    onClick: () -> Unit,
 ) {
-    var expanded by remember { mutableStateOf(false) }
-    val options = SearchSortOrder.EVENT_OPTIONS
-
-    TextButton(
-        onClick = { if (enabled) expanded = true },
-        enabled = enabled,
-    ) {
-        Text(
-            text =
-                when (currentSort) {
-                    SearchSortOrder.NEWEST -> stringRes(R.string.search_sort_newest)
-                    SearchSortOrder.RELEVANCE -> stringRes(R.string.search_sort_relevance)
-                    SearchSortOrder.POPULAR -> stringRes(R.string.search_sort_popular)
-                    SearchSortOrder.OLDEST -> stringRes(R.string.search_sort_oldest)
-                    else -> stringRes(R.string.search_sort_newest)
-                },
-        )
-    }
-    DropdownMenu(expanded = expanded, onDismissRequest = { expanded = false }) {
-        options.forEach { opt ->
-            DropdownMenuItem(
-                text = {
-                    Text(
-                        when (opt) {
-                            SearchSortOrder.NEWEST -> stringRes(R.string.search_sort_newest)
-                            SearchSortOrder.RELEVANCE -> stringRes(R.string.search_sort_relevance)
-                            SearchSortOrder.POPULAR -> stringRes(R.string.search_sort_popular)
-                            SearchSortOrder.OLDEST -> stringRes(R.string.search_sort_oldest)
-                            else -> opt.label
-                        },
-                    )
-                },
-                onClick = {
-                    onSelect(opt)
-                    expanded = false
-                },
+    Box {
+        IconButton(onClick = onClick) {
+            Icon(
+                imageVector = Icons.Outlined.Tune,
+                contentDescription = stringRes(R.string.search_filters_open),
+            )
+        }
+        if (hasBadge) {
+            Box(
+                modifier =
+                    Modifier
+                        .align(Alignment.TopEnd)
+                        .offset(x = (-10).dp, y = 10.dp)
+                        .size(8.dp)
+                        .background(MaterialTheme.colorScheme.primary, CircleShape),
             )
         }
     }
 }
 
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun SearchFiltersSheet(
+    scope: SearchScope,
+    source: SearchSource,
+    followsOnly: Boolean,
+    sort: SearchSortOrder,
+    onSourceChange: (SearchSource) -> Unit,
+    onFollowsOnlyChange: (Boolean) -> Unit,
+    onSortChange: (SearchSortOrder) -> Unit,
+    onReset: () -> Unit,
+    onDismiss: () -> Unit,
+) {
+    val sheetState = rememberModalBottomSheetState(skipPartiallyExpanded = true)
+
+    ModalBottomSheet(
+        onDismissRequest = onDismiss,
+        sheetState = sheetState,
+    ) {
+        Column(
+            modifier =
+                Modifier
+                    .fillMaxWidth()
+                    .padding(horizontal = 20.dp)
+                    .padding(bottom = 24.dp),
+            verticalArrangement = Arrangement.spacedBy(20.dp),
+        ) {
+            Text(
+                text = stringRes(R.string.search_filters_title),
+                style = MaterialTheme.typography.titleMedium,
+            )
+
+            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                Text(
+                    text = stringRes(R.string.search_filters_section_source),
+                    style = MaterialTheme.typography.labelLarge,
+                )
+                SingleChoiceSegmentedButtonRow(modifier = Modifier.fillMaxWidth()) {
+                    val sources = listOf(SearchSource.LOCAL, SearchSource.RELAYS)
+                    sources.forEachIndexed { index, s ->
+                        SegmentedButton(
+                            selected = source == s,
+                            onClick = { onSourceChange(s) },
+                            shape = SegmentedButtonDefaults.itemShape(index = index, count = sources.size),
+                        ) {
+                            Text(
+                                text =
+                                    when (s) {
+                                        SearchSource.LOCAL -> stringRes(R.string.search_source_local)
+                                        SearchSource.RELAYS -> stringRes(R.string.search_source_relays)
+                                    },
+                            )
+                        }
+                    }
+                }
+            }
+
+            Row(
+                modifier =
+                    Modifier
+                        .fillMaxWidth()
+                        .clickable { onFollowsOnlyChange(!followsOnly) }
+                        .padding(vertical = 4.dp),
+                verticalAlignment = Alignment.CenterVertically,
+            ) {
+                Text(
+                    text = stringRes(R.string.search_follows_only),
+                    modifier = Modifier.weight(1f),
+                    style = MaterialTheme.typography.bodyLarge,
+                )
+                Switch(
+                    checked = followsOnly,
+                    onCheckedChange = onFollowsOnlyChange,
+                )
+            }
+
+            if (scope != SearchScope.PEOPLE) {
+                Column(verticalArrangement = Arrangement.spacedBy(4.dp)) {
+                    Text(
+                        text = stringRes(R.string.search_filters_section_sort),
+                        style = MaterialTheme.typography.labelLarge,
+                    )
+                    SearchSortOrder.EVENT_OPTIONS.forEach { opt ->
+                        Row(
+                            modifier =
+                                Modifier
+                                    .fillMaxWidth()
+                                    .selectable(
+                                        selected = sort == opt,
+                                        onClick = { onSortChange(opt) },
+                                    ).padding(vertical = 8.dp),
+                            verticalAlignment = Alignment.CenterVertically,
+                        ) {
+                            RadioButton(
+                                selected = sort == opt,
+                                onClick = { onSortChange(opt) },
+                            )
+                            Text(
+                                text = sortLabel(opt),
+                                modifier = Modifier.padding(start = 8.dp),
+                                style = MaterialTheme.typography.bodyLarge,
+                            )
+                        }
+                    }
+                }
+            }
+
+            TextButton(onClick = onReset) {
+                Text(stringRes(R.string.search_filters_reset))
+            }
+        }
+    }
+}
+
+@Composable
+private fun sortLabel(opt: SearchSortOrder): String =
+    when (opt) {
+        SearchSortOrder.NEWEST -> stringRes(R.string.search_sort_newest)
+        SearchSortOrder.RELEVANCE -> stringRes(R.string.search_sort_relevance)
+        SearchSortOrder.POPULAR -> stringRes(R.string.search_sort_popular)
+        SearchSortOrder.OLDEST -> stringRes(R.string.search_sort_oldest)
+        SearchSortOrder.NAME_AZ, SearchSortOrder.NAME_ZA -> opt.label
+    }
+
 @Composable
 private fun SearchTextField(
     searchBarViewModel: SearchBarViewModel,

amethyst/src/main/res/values/strings.xml

@@ -1880,6 +1880,11 @@
     <string name="search_sort_oldest">Oldest</string>
     <string name="search_sort_relevance">Relevance</string>
     <string name="search_sort_popular">Popular</string>
+    <string name="search_filters_title">Filters</string>
+    <string name="search_filters_reset">Reset</string>
+    <string name="search_filters_section_source">Source</string>
+    <string name="search_filters_section_sort">Sort by</string>
+    <string name="search_filters_open">Filters</string>
 
     <string name="dont_translate_from">Don\'t Translate From</string>
     <string name="dont_translate_from_description">Languages shown here will not be translated. Select a language to remove it and have it translated again.</string>