Merge pull request 'feat: full-text event search' (!33) from feat/event-search into release/v2.8.0

Reviewed-on: #33

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/CalendarDataSource.kt

@@ -47,6 +47,14 @@ interface CalendarDataSource {
     fun instances(beginMillis: Long, endMillis: Long): List<EventInstance>
     fun eventDetail(eventId: Long): EventDetail?
 
+    /**
+     * Master/one-off events whose title, description or location contains
+     * [query] (case-insensitive), across all calendars, newest first. Reads the
+     * Events table directly so the search is unbounded in time; exception rows
+     * are excluded (see [SearchProjection]). [query] is assumed non-blank.
+     */
+    fun searchEvents(query: String): List<EventInstance>
+
     /**
      * The event-colour palette the calendar's account publishes
      * (`CalendarContract.Colors`, `TYPE_EVENT`), sorted by key. Empty when the
@@ -298,6 +306,89 @@ class AndroidCalendarDataSource @Inject constructor(
         )?.use { c -> c.mapAllNotNull { CursorColumnReader(c).toEventInstance() } } ?: emptyList()
     }
 
+    override fun searchEvents(query: String): List<EventInstance> {
+        ensureObserversRegistered()
+        val trimmed = query.trim()
+        if (trimmed.isEmpty()) return emptyList()
+        // Escape the SQL LIKE wildcards so a literal % or _ in the query matches
+        // itself instead of acting as a wildcard.
+        val escaped = trimmed
+            .replace("\\", "\\\\")
+            .replace("%", "\\%")
+            .replace("_", "\\_")
+        val like = "%$escaped%"
+        val match = "${CalendarContract.Events.TITLE} LIKE ? ESCAPE '\\' OR " +
+            "${CalendarContract.Events.DESCRIPTION} LIKE ? ESCAPE '\\' OR " +
+            "${CalendarContract.Events.EVENT_LOCATION} LIKE ? ESCAPE '\\'"
+        val selection = "($match) AND " +
+            "${CalendarContract.Events.DELETED} = 0 AND " +
+            "${CalendarContract.Events.ORIGINAL_ID} IS NULL"
+        return resolver.query(
+            CalendarContract.Events.CONTENT_URI,
+            SearchProjection.COLUMNS,
+            selection,
+            arrayOf(like, like, like),
+            CalendarContract.Events.DTSTART + " DESC",
+        )?.use { c ->
+            val reader = CursorColumnReader(c)
+            val out = ArrayList<EventInstance>(c.count)
+            while (c.moveToNext()) {
+                val base = reader.toSearchResult() ?: continue
+                // A recurring master's DTSTART is the series start; show its
+                // nearest occurrence instead so the date is the one the user
+                // actually cares about (and sorting reflects it).
+                val recurring = !reader.getString(SearchProjection.IDX_RRULE).isNullOrEmpty() ||
+                    !reader.getString(SearchProjection.IDX_RDATE).isNullOrEmpty()
+                out += if (recurring) {
+                    nearestOccurrenceMillis(base.eventId)?.let { (begin, end) ->
+                        base.copy(
+                            start = begin.toKotlinInstantFromEpochMillis(),
+                            end = end.toKotlinInstantFromEpochMillis(),
+                        )
+                    } ?: base
+                } else {
+                    base
+                }
+            }
+            out
+        } ?: emptyList()
+    }
+
+    /**
+     * The occurrence of [eventId] nearest to now: the soonest upcoming one
+     * within [OCCURRENCE_WINDOW_MILLIS] ahead, else the most recent past one
+     * within the same window behind. Null when neither exists (e.g. a series
+     * that only starts further out than the window) — the caller then keeps the
+     * series-start DTSTART. Returns (begin, end) epoch millis.
+     */
+    private fun nearestOccurrenceMillis(eventId: Long): Pair<Long, Long>? {
+        val now = System.currentTimeMillis()
+        return occurrenceInWindow(eventId, now, now + OCCURRENCE_WINDOW_MILLIS, soonestFirst = true)
+            ?: occurrenceInWindow(eventId, now - OCCURRENCE_WINDOW_MILLIS, now, soonestFirst = false)
+    }
+
+    private fun occurrenceInWindow(
+        eventId: Long,
+        beginMillis: Long,
+        endMillis: Long,
+        soonestFirst: Boolean,
+    ): Pair<Long, Long>? {
+        val uri = CalendarContract.Instances.CONTENT_URI.buildUpon().apply {
+            ContentUris.appendId(this, beginMillis)
+            ContentUris.appendId(this, endMillis)
+        }.build()
+        val order = CalendarContract.Instances.BEGIN + if (soonestFirst) " ASC" else " DESC"
+        return resolver.query(
+            uri,
+            arrayOf(CalendarContract.Instances.BEGIN, CalendarContract.Instances.END),
+            "${CalendarContract.Instances.EVENT_ID} = ?",
+            arrayOf(eventId.toString()),
+            order,
+        )?.use { c ->
+            if (!c.moveToFirst()) null else c.getLong(0) to c.getLong(1)
+        }
+    }
+
     override fun eventDetail(eventId: Long): EventDetail? {
         val attendees = queryAttendees(eventId)
         val reminders = queryReminders(eventId)
@@ -955,5 +1046,12 @@ class AndroidCalendarDataSource @Inject constructor(
          * together (by account) in the filter sheet and calendar manager.
          */
         const val LOCAL_ACCOUNT_NAME = "Calendula"
+
+        /**
+         * How far ahead/behind a search looks for a recurring event's nearest
+         * occurrence (~2 years). Wide enough for everyday series; a series that
+         * next fires beyond it falls back to its series-start date.
+         */
+        const val OCCURRENCE_WINDOW_MILLIS = 2L * 365 * 24 * 60 * 60 * 1000
     }
 }

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/CalendarRepository.kt

@@ -16,6 +16,13 @@ interface CalendarRepository {
     fun instances(range: ClosedRange<Instant>): Flow<List<EventInstance>>
     suspend fun eventDetail(eventId: Long): EventDetail
 
+    /**
+     * Events whose title, description or location contains [query], with hidden
+     * calendars removed and newest first. Empty when [query] is blank. Searches
+     * the whole history/future (see [CalendarDataSource.searchEvents]).
+     */
+    suspend fun searchEvents(query: String): List<EventInstance>
+
     /**
      * The event-colour palette a calendar's account publishes; empty when it
      * exposes none (see [CalendarDataSource.eventColorPalette]).

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/CalendarRepositoryImpl.kt

@@ -80,6 +80,13 @@ class CalendarRepositoryImpl @Inject constructor(
         dataSource.eventDetail(eventId) ?: throw NoSuchEventException(eventId)
     }
 
+    override suspend fun searchEvents(query: String): List<EventInstance> = withContext(io) {
+        if (query.isBlank()) return@withContext emptyList()
+        val hidden = prefs.hiddenCalendarIds.first()
+        dataSource.searchEvents(query)
+            .let { if (hidden.isEmpty()) it else it.filterNot { e -> e.calendarId in hidden } }
+    }
+
     override suspend fun eventColorPalette(calendarId: Long): List<EventColorOption> =
         withContext(io) { dataSource.eventColorPalette(calendarId) }
 

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/Projections.kt

@@ -139,6 +139,44 @@ internal object EventExportProjection {
     const val IDX_CALENDAR_ID = 13
 }
 
+/**
+ * Master/one-off Events rows matched by a full-text search. Like
+ * [EventExportProjection] it reads the Events table directly (so the search is
+ * unbounded in time), carrying DURATION for recurring rows that have no DTEND.
+ * Colour folds the calendar fallback like [InstanceProjection].
+ */
+internal object SearchProjection {
+    val COLUMNS: Array<String> = arrayOf(
+        CalendarContract.Events._ID,
+        CalendarContract.Events.CALENDAR_ID,
+        CalendarContract.Events.TITLE,
+        CalendarContract.Events.DTSTART,
+        CalendarContract.Events.DTEND,
+        CalendarContract.Events.DURATION,
+        CalendarContract.Events.ALL_DAY,
+        CalendarContract.Events.EVENT_COLOR,
+        CalendarContract.Events.CALENDAR_COLOR,
+        CalendarContract.Events.EVENT_LOCATION,
+        // Recurrence markers: a non-empty RRULE or RDATE means the result should
+        // display its nearest occurrence, not the series-start DTSTART.
+        CalendarContract.Events.RRULE,
+        CalendarContract.Events.RDATE,
+    )
+
+    const val IDX_ID = 0
+    const val IDX_CALENDAR_ID = 1
+    const val IDX_TITLE = 2
+    const val IDX_DTSTART = 3
+    const val IDX_DTEND = 4
+    const val IDX_DURATION = 5
+    const val IDX_ALL_DAY = 6
+    const val IDX_EVENT_COLOR = 7
+    const val IDX_CALENDAR_COLOR = 8
+    const val IDX_LOCATION = 9
+    const val IDX_RRULE = 10
+    const val IDX_RDATE = 11
+}
+
 internal object AttendeeProjection {
     val COLUMNS: Array<String> = arrayOf(
         CalendarContract.Attendees.ATTENDEE_NAME,

app/src/main/java/de/jeanlucmakiola/calendula/data/calendar/SearchMapper.kt

@@ -0,0 +1,40 @@
+package de.jeanlucmakiola.calendula.data.calendar
+
+import de.jeanlucmakiola.calendula.domain.EventInstance
+import de.jeanlucmakiola.calendula.domain.ics.parseRfc2445DurationMillis
+
+/**
+ * Map an Events-table row (a search hit) to an [EventInstance]. Unlike the
+ * Instances query this reads the series master, so there is no instance id (the
+ * event id stands in as the list key) and recurring rows carry DURATION instead
+ * of DTEND — reconstruct the end the same way the `.ics` export does.
+ */
+internal fun ColumnReader.toSearchResult(): EventInstance? {
+    val dtStart = getLong(SearchProjection.IDX_DTSTART)
+    if (dtStart < 0L) return null
+    val end = when {
+        !isNull(SearchProjection.IDX_DTEND) -> getLong(SearchProjection.IDX_DTEND)
+        else -> dtStart + parseRfc2445DurationMillis(getString(SearchProjection.IDX_DURATION))
+    }.coerceAtLeast(dtStart)
+
+    val rawTitle = getString(SearchProjection.IDX_TITLE)
+    val title = if (rawTitle.isNullOrEmpty()) Fallbacks.UNTITLED_EVENT else rawTitle
+    val color = if (isNull(SearchProjection.IDX_EVENT_COLOR)) {
+        getInt(SearchProjection.IDX_CALENDAR_COLOR)
+    } else {
+        getInt(SearchProjection.IDX_EVENT_COLOR)
+    }
+    val eventId = getLong(SearchProjection.IDX_ID)
+
+    return EventInstance(
+        instanceId = eventId,
+        eventId = eventId,
+        calendarId = getLong(SearchProjection.IDX_CALENDAR_ID),
+        title = title,
+        start = dtStart.toKotlinInstantFromEpochMillis(),
+        end = end.toKotlinInstantFromEpochMillis(),
+        isAllDay = getInt(SearchProjection.IDX_ALL_DAY) != 0,
+        color = color,
+        location = getString(SearchProjection.IDX_LOCATION),
+    )
+}

app/src/main/java/de/jeanlucmakiola/calendula/ui/CalendarHost.kt

@@ -26,6 +26,7 @@ import de.jeanlucmakiola.calendula.ui.detail.EventDetailScreen
 import de.jeanlucmakiola.calendula.ui.edit.EventEditScreen
 import de.jeanlucmakiola.calendula.ui.imports.ImportScreen
 import de.jeanlucmakiola.calendula.ui.month.MonthScreen
+import de.jeanlucmakiola.calendula.ui.search.SearchScreen
 import de.jeanlucmakiola.calendula.ui.settings.SettingsScreen
 import de.jeanlucmakiola.calendula.ui.week.WeekScreen
 import kotlinx.datetime.LocalDate
@@ -97,6 +98,12 @@ fun CalendarHost(
     var showSettings by rememberSaveable { mutableStateOf(false) }
     val onOpenSettings = { showSettings = true }
 
+    // Full-text search — its own overlay, opened from each calendar screen's
+    // top bar. Sits below the detail/edit overlays so tapping a result reveals
+    // the detail on top and backing out returns to the results.
+    var showSearch by rememberSaveable { mutableStateOf(false) }
+    val onOpenSearch = { showSearch = true }
+
     // Calendar manager (reached from Settings) — its own overlay so it slides
     // over Settings and survives view switches.
     var showCalendars by rememberSaveable { mutableStateOf(false) }
@@ -189,6 +196,7 @@ fun CalendarHost(
                 onSelectView = onSelectView,
                 onEventClick = onEventClick,
                 onOpenSettings = onOpenSettings,
+                onOpenSearch = onOpenSearch,
                 onCreateEvent = onCreateEvent,
             )
             CalendarView.Day -> DayScreen(
@@ -196,6 +204,7 @@ fun CalendarHost(
                 onSelectView = onSelectView,
                 onEventClick = onEventClick,
                 onOpenSettings = onOpenSettings,
+                onOpenSearch = onOpenSearch,
                 onCreateEvent = onCreateEvent,
                 initialDateIso = pendingDayIso,
             )
@@ -204,6 +213,7 @@ fun CalendarHost(
                 onSelectView = onSelectView,
                 onOpenDay = onOpenDay,
                 onOpenSettings = onOpenSettings,
+                onOpenSearch = onOpenSearch,
                 onCreateEvent = onCreateEvent,
             )
             CalendarView.Agenda -> AgendaScreen(
@@ -211,10 +221,24 @@ fun CalendarHost(
                 onSelectView = onSelectView,
                 onEventClick = onEventClick,
                 onOpenSettings = onOpenSettings,
+                onOpenSearch = onOpenSearch,
                 onCreateEvent = onCreateEvent,
             )
         }
 
+        // Search overlay — below detail/edit in the Box so a tapped result's
+        // detail screen draws on top, and closing it returns to the results.
+        AnimatedVisibility(
+            visible = showSearch,
+            enter = slideInHorizontally(slideSpec) { it } + fadeIn(),
+            exit = slideOutHorizontally(slideSpec) { it } + fadeOut(),
+        ) {
+            SearchScreen(
+                onBack = { showSearch = false },
+                onEventClick = onEventClick,
+            )
+        }
+
         // Prefer the live key; fall back to the held one only while sliding out.
         val activeKey = detailKey ?: heldKey
         AnimatedVisibility(

app/src/main/java/de/jeanlucmakiola/calendula/ui/agenda/AgendaScreen.kt

@@ -19,6 +19,7 @@ import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.EventAvailable
 import androidx.compose.material.icons.filled.Menu
+import androidx.compose.material.icons.filled.Search
 import androidx.compose.material3.DrawerValue
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
@@ -75,6 +76,7 @@ fun AgendaScreen(
     onSelectView: (CalendarView) -> Unit,
     onEventClick: (EventInstance) -> Unit,
     onOpenSettings: () -> Unit,
+    onOpenSearch: () -> Unit,
     onCreateEvent: (LocalDate, Int?) -> Unit,
     modifier: Modifier = Modifier,
     viewModel: AgendaViewModel = hiltViewModel(),
@@ -119,6 +121,7 @@ fun AgendaScreen(
                     selectedView = selectedView,
                     onCycleView = { onSelectView(selectedView.next()) },
                     onOpenDrawer = { scope.launch { drawerState.open() } },
+                    onOpenSearch = onOpenSearch,
                     scrollBehavior = scrollBehavior,
                 )
             },
@@ -274,6 +277,7 @@ private fun AgendaTopBar(
     selectedView: CalendarView,
     onCycleView: () -> Unit,
     onOpenDrawer: () -> Unit,
+    onOpenSearch: () -> Unit,
     scrollBehavior: TopAppBarScrollBehavior,
 ) {
     TopAppBar(
@@ -292,6 +296,12 @@ private fun AgendaTopBar(
             }
         },
         actions = {
+            IconButton(onClick = onOpenSearch) {
+                Icon(
+                    imageVector = Icons.Default.Search,
+                    contentDescription = stringResource(R.string.search_action),
+                )
+            }
             ViewSwitcherPill(
                 current = selectedView,
                 onCycle = onCycleView,

app/src/main/java/de/jeanlucmakiola/calendula/ui/day/DayScreen.kt

@@ -26,6 +26,7 @@ import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Menu
+import androidx.compose.material.icons.filled.Search
 import androidx.compose.material3.Card
 import androidx.compose.material3.CardDefaults
 import androidx.compose.material3.DrawerValue
@@ -106,6 +107,7 @@ fun DayScreen(
     onSelectView: (CalendarView) -> Unit,
     onEventClick: (EventInstance) -> Unit,
     onOpenSettings: () -> Unit,
+    onOpenSearch: () -> Unit,
     onCreateEvent: (LocalDate, Int?) -> Unit,
     modifier: Modifier = Modifier,
     initialDateIso: String? = null,
@@ -189,6 +191,7 @@ fun DayScreen(
                     selectedView = selectedView,
                     onCycleView = { onSelectView(selectedView.next()) },
                     onOpenDrawer = { scope.launch { drawerState.open() } },
+                    onOpenSearch = onOpenSearch,
                     scrollBehavior = scrollBehavior,
                 )
             },
@@ -341,6 +344,7 @@ private fun DayTopBar(
     selectedView: CalendarView,
     onCycleView: () -> Unit,
     onOpenDrawer: () -> Unit,
+    onOpenSearch: () -> Unit,
     scrollBehavior: androidx.compose.material3.TopAppBarScrollBehavior,
 ) {
     TopAppBar(
@@ -359,6 +363,12 @@ private fun DayTopBar(
             }
         },
         actions = {
+            IconButton(onClick = onOpenSearch) {
+                Icon(
+                    imageVector = Icons.Default.Search,
+                    contentDescription = stringResource(R.string.search_action),
+                )
+            }
             ViewSwitcherPill(
                 current = selectedView,
                 onCycle = onCycleView,

app/src/main/java/de/jeanlucmakiola/calendula/ui/month/MonthScreen.kt

@@ -23,6 +23,7 @@ import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Menu
+import androidx.compose.material.icons.filled.Search
 import androidx.compose.material3.DrawerValue
 import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Icon
@@ -86,6 +87,7 @@ fun MonthScreen(
     onSelectView: (CalendarView) -> Unit,
     onOpenDay: (LocalDate) -> Unit,
     onOpenSettings: () -> Unit,
+    onOpenSearch: () -> Unit,
     onCreateEvent: (LocalDate, Int?) -> Unit,
     modifier: Modifier = Modifier,
     viewModel: MonthViewModel = hiltViewModel(),
@@ -161,6 +163,7 @@ fun MonthScreen(
                     selectedView = selectedView,
                     onCycleView = { onSelectView(selectedView.next()) },
                     onOpenDrawer = { scope.launch { drawerState.open() } },
+                    onOpenSearch = onOpenSearch,
                     scrollBehavior = scrollBehavior,
                 )
             },
@@ -261,6 +264,7 @@ private fun MonthTopBar(
     selectedView: CalendarView,
     onCycleView: () -> Unit,
     onOpenDrawer: () -> Unit,
+    onOpenSearch: () -> Unit,
     scrollBehavior: androidx.compose.material3.TopAppBarScrollBehavior,
 ) {
     TopAppBar(
@@ -279,6 +283,12 @@ private fun MonthTopBar(
             }
         },
         actions = {
+            IconButton(onClick = onOpenSearch) {
+                Icon(
+                    imageVector = Icons.Default.Search,
+                    contentDescription = stringResource(R.string.search_action),
+                )
+            }
             ViewSwitcherPill(
                 current = selectedView,
                 onCycle = onCycleView,

app/src/main/java/de/jeanlucmakiola/calendula/ui/search/SearchScreen.kt

@@ -0,0 +1,257 @@
+package de.jeanlucmakiola.calendula.ui.search
+
+import androidx.activity.compose.BackHandler
+import androidx.compose.foundation.background
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.PaddingValues
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.imePadding
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.itemsIndexed
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.automirrored.filled.ArrowBack
+import androidx.compose.material.icons.filled.Close
+import androidx.compose.material.icons.filled.SearchOff
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.material3.TopAppBar
+import androidx.compose.material3.TopAppBarDefaults
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.focus.FocusRequester
+import androidx.compose.ui.focus.focusRequester
+import androidx.compose.ui.graphics.vector.ImageVector
+import androidx.compose.ui.platform.LocalSoftwareKeyboardController
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.input.ImeAction
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.hilt.navigation.compose.hiltViewModel
+import androidx.lifecycle.compose.collectAsStateWithLifecycle
+import de.jeanlucmakiola.calendula.R
+import de.jeanlucmakiola.calendula.domain.EventInstance
+import de.jeanlucmakiola.calendula.ui.common.GroupedRow
+import de.jeanlucmakiola.calendula.ui.common.InlineTextField
+import de.jeanlucmakiola.calendula.ui.common.Position
+import de.jeanlucmakiola.calendula.ui.common.currentLocale
+import de.jeanlucmakiola.calendula.ui.common.pastelize
+import de.jeanlucmakiola.calendula.ui.common.positionOf
+import java.time.Instant as JavaInstant
+import java.time.ZoneId
+import java.time.format.DateTimeFormatter
+import java.time.format.FormatStyle
+
+/**
+ * Full-text event search (top-bar entry). Type a query → matching events
+ * (title / location / description) across the whole calendar, newest-relevant
+ * first; tap a result to open its detail. A full-screen overlay hosted by
+ * [de.jeanlucmakiola.calendula.ui.CalendarHost].
+ */
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun SearchScreen(
+    onBack: () -> Unit,
+    onEventClick: (EventInstance) -> Unit,
+    modifier: Modifier = Modifier,
+    viewModel: SearchViewModel = hiltViewModel(),
+) {
+    val query by viewModel.query.collectAsStateWithLifecycle()
+    val state by viewModel.state.collectAsStateWithLifecycle()
+    val focusRequester = remember { FocusRequester() }
+    val keyboard = LocalSoftwareKeyboardController.current
+
+    // Each fresh open starts blank and straight into typing. The ViewModel is
+    // activity-scoped so it outlives the overlay; clearing on (re)enter is what
+    // resets a previous search. Peeking a result doesn't re-run this (the screen
+    // stays composed under the detail), so backing out keeps the query.
+    LaunchedEffect(Unit) {
+        viewModel.setQuery("")
+        focusRequester.requestFocus()
+        keyboard?.show()
+    }
+    BackHandler(onBack = onBack)
+
+    Scaffold(
+        modifier = modifier,
+        containerColor = MaterialTheme.colorScheme.surface,
+        topBar = {
+            TopAppBar(
+                title = {
+                    InlineTextField(
+                        value = query,
+                        onValueChange = viewModel::setQuery,
+                        placeholder = stringResource(R.string.search_hint),
+                        imeAction = ImeAction.Search,
+                        onImeAction = { keyboard?.hide() },
+                        modifier = Modifier
+                            .fillMaxWidth()
+                            .focusRequester(focusRequester),
+                    )
+                },
+                navigationIcon = {
+                    IconButton(onClick = onBack) {
+                        Icon(
+                            imageVector = Icons.AutoMirrored.Filled.ArrowBack,
+                            contentDescription = stringResource(R.string.search_back),
+                        )
+                    }
+                },
+                actions = {
+                    if (query.isNotEmpty()) {
+                        IconButton(onClick = { viewModel.setQuery("") }) {
+                            Icon(
+                                imageVector = Icons.Default.Close,
+                                contentDescription = stringResource(R.string.search_clear),
+                            )
+                        }
+                    }
+                },
+                colors = TopAppBarDefaults.topAppBarColors(
+                    containerColor = MaterialTheme.colorScheme.surface,
+                ),
+            )
+        },
+    ) { padding ->
+        // imePadding shrinks the content by the keyboard, so the centered
+        // idle/empty message re-centres in the space above it (and the results
+        // list lifts clear of the keyboard too).
+        Box(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(padding)
+                .imePadding(),
+        ) {
+            when (val s = state) {
+                SearchUiState.Idle -> SearchMessage(
+                    icon = null,
+                    text = stringResource(R.string.search_idle_hint),
+                )
+                is SearchUiState.Empty -> SearchMessage(
+                    icon = Icons.Default.SearchOff,
+                    text = stringResource(R.string.search_empty, s.query),
+                )
+                is SearchUiState.Results -> SearchResults(
+                    events = s.events,
+                    onEventClick = onEventClick,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun SearchResults(
+    events: List<EventInstance>,
+    onEventClick: (EventInstance) -> Unit,
+) {
+    LazyColumn(
+        modifier = Modifier.fillMaxSize(),
+        contentPadding = PaddingValues(start = 16.dp, end = 16.dp, top = 8.dp, bottom = 96.dp),
+    ) {
+        itemsIndexed(
+            items = events,
+            key = { _, event -> event.eventId },
+        ) { index, event ->
+            SearchResultRow(
+                event = event,
+                position = positionOf(index, events.size),
+                onClick = { onEventClick(event) },
+            )
+        }
+    }
+}
+
+@Composable
+private fun SearchResultRow(
+    event: EventInstance,
+    position: Position,
+    onClick: () -> Unit,
+) {
+    val dark = isSystemInDarkTheme()
+    GroupedRow(
+        title = event.title,
+        summary = searchSummary(event),
+        position = position,
+        minHeight = 64.dp,
+        leading = {
+            Box(
+                modifier = Modifier
+                    .size(width = 6.dp, height = 36.dp)
+                    .clip(RoundedCornerShape(3.dp))
+                    .background(pastelize(event.color, dark)),
+            )
+        },
+        onClick = onClick,
+    )
+}
+
+/** "Wed, 17 Jun 2026 · 09:00 · Office" — date, then time (or All day), then location. */
+@Composable
+private fun searchSummary(event: EventInstance): String {
+    val locale = currentLocale()
+    val zone = remember { ZoneId.systemDefault() }
+    val start = remember(event.start, zone) {
+        JavaInstant.ofEpochMilli(event.start.toEpochMilliseconds()).atZone(zone)
+    }
+    val dateText = remember(locale) {
+        DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM).withLocale(locale)
+    }.format(start)
+    val timeText = if (event.isAllDay) {
+        stringResource(R.string.event_detail_all_day)
+    } else {
+        remember(locale) {
+            DateTimeFormatter.ofLocalizedTime(FormatStyle.SHORT).withLocale(locale)
+        }.format(start)
+    }
+    val base = "$dateText · $timeText"
+    return event.location?.takeIf { it.isNotBlank() }?.let { "$base · $it" } ?: base
+}
+
+@Composable
+private fun SearchMessage(
+    icon: ImageVector?,
+    text: String,
+) {
+    Surface(color = MaterialTheme.colorScheme.surface, modifier = Modifier.fillMaxSize()) {
+        Column(
+            modifier = Modifier.fillMaxSize().padding(32.dp),
+            verticalArrangement = Arrangement.Center,
+            horizontalAlignment = Alignment.CenterHorizontally,
+        ) {
+            if (icon != null) {
+                Icon(
+                    imageVector = icon,
+                    contentDescription = null,
+                    tint = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.size(48.dp),
+                )
+                Spacer(Modifier.height(16.dp))
+            }
+            Text(
+                text = text,
+                style = MaterialTheme.typography.bodyMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                textAlign = TextAlign.Center,
+            )
+        }
+    }
+}

app/src/main/java/de/jeanlucmakiola/calendula/ui/search/SearchViewModel.kt

@@ -0,0 +1,77 @@
+package de.jeanlucmakiola.calendula.ui.search
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import dagger.hilt.android.lifecycle.HiltViewModel
+import de.jeanlucmakiola.calendula.data.calendar.CalendarRepository
+import de.jeanlucmakiola.calendula.data.di.IoDispatcher
+import de.jeanlucmakiola.calendula.domain.EventInstance
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.SharingStarted
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.catch
+import kotlinx.coroutines.flow.debounce
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.flowOn
+import kotlinx.coroutines.flow.map
+import kotlinx.coroutines.flow.mapLatest
+import kotlinx.coroutines.flow.stateIn
+import kotlin.time.Clock
+import javax.inject.Inject
+
+/** Shortest query that triggers a search; one character matches almost everything. */
+private const val MIN_QUERY_LENGTH = 2
+
+sealed interface SearchUiState {
+    /** No query yet, or one too short to search — show the prompt. */
+    data object Idle : SearchUiState
+
+    /** A query ran but matched nothing. */
+    data class Empty(val query: String) : SearchUiState
+
+    /** Matches, ordered nearest-to-today first (upcoming ascending, then past descending). */
+    data class Results(val events: List<EventInstance>) : SearchUiState
+}
+
+@OptIn(ExperimentalCoroutinesApi::class, FlowPreview::class)
+@HiltViewModel
+class SearchViewModel @Inject constructor(
+    private val repository: CalendarRepository,
+    @IoDispatcher private val io: CoroutineDispatcher,
+) : ViewModel() {
+
+    private val _query = MutableStateFlow("")
+    val query: StateFlow<String> = _query.asStateFlow()
+
+    val state: StateFlow<SearchUiState> = _query
+        .debounce(250L)
+        .map { it.trim() }
+        .distinctUntilChanged()
+        .mapLatest { q ->
+            if (q.length < MIN_QUERY_LENGTH) {
+                SearchUiState.Idle
+            } else {
+                val results = repository.searchEvents(q)
+                if (results.isEmpty()) SearchUiState.Empty(q)
+                else SearchUiState.Results(sortNearestFirst(results))
+            }
+        }
+        .catch { emit(SearchUiState.Idle) }
+        .flowOn(io)
+        .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000L), SearchUiState.Idle)
+
+    fun setQuery(value: String) {
+        _query.value = value
+    }
+
+    /** Soonest upcoming (and ongoing) first, then the most recent past. */
+    private fun sortNearestFirst(events: List<EventInstance>): List<EventInstance> {
+        val now = Clock.System.now()
+        val (upcoming, past) = events.partition { it.end >= now }
+        return upcoming.sortedBy { it.start } + past.sortedByDescending { it.start }
+    }
+}

app/src/main/java/de/jeanlucmakiola/calendula/ui/week/WeekScreen.kt

@@ -29,6 +29,7 @@ import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Menu
+import androidx.compose.material.icons.filled.Search
 import androidx.compose.material3.Card
 import androidx.compose.material3.CardDefaults
 import androidx.compose.material3.DrawerValue
@@ -114,6 +115,7 @@ fun WeekScreen(
     onSelectView: (CalendarView) -> Unit,
     onEventClick: (EventInstance) -> Unit,
     onOpenSettings: () -> Unit,
+    onOpenSearch: () -> Unit,
     onCreateEvent: (LocalDate, Int?) -> Unit,
     modifier: Modifier = Modifier,
     viewModel: WeekViewModel = hiltViewModel(),
@@ -194,6 +196,7 @@ fun WeekScreen(
                     selectedView = selectedView,
                     onCycleView = { onSelectView(selectedView.next()) },
                     onOpenDrawer = { scope.launch { drawerState.open() } },
+                    onOpenSearch = onOpenSearch,
                     scrollBehavior = scrollBehavior,
                 )
             },
@@ -352,6 +355,7 @@ private fun WeekTopBar(
     selectedView: CalendarView,
     onCycleView: () -> Unit,
     onOpenDrawer: () -> Unit,
+    onOpenSearch: () -> Unit,
     scrollBehavior: androidx.compose.material3.TopAppBarScrollBehavior,
 ) {
     TopAppBar(
@@ -370,6 +374,12 @@ private fun WeekTopBar(
             }
         },
         actions = {
+            IconButton(onClick = onOpenSearch) {
+                Icon(
+                    imageVector = Icons.Default.Search,
+                    contentDescription = stringResource(R.string.search_action),
+                )
+            }
             ViewSwitcherPill(
                 current = selectedView,
                 onCycle = onCycleView,

app/src/main/res/values-de/strings.xml

@@ -233,6 +233,14 @@
     <string name="agenda_empty_title">Nichts geplant</string>
     <string name="agenda_empty_subtitle">Anstehende Termine erscheinen hier.</string>
 
+    <!-- Terminsuche -->
+    <string name="search_action">Suchen</string>
+    <string name="search_hint">Termine suchen</string>
+    <string name="search_back">Zurück</string>
+    <string name="search_clear">Löschen</string>
+    <string name="search_idle_hint">Durchsuche deine Termine nach Titel, Ort oder Notizen.</string>
+    <string name="search_empty">Keine Termine passen zu „%1$s“.</string>
+
     <!-- Startbildschirm-Widgets -->
     <string name="widget_agenda_title">Anstehend</string>
     <string name="widget_agenda_label">Calendula Agenda</string>

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

@@ -234,6 +234,14 @@
     <string name="agenda_empty_title">Nothing scheduled</string>
     <string name="agenda_empty_subtitle">Upcoming events will show up here.</string>
 
+    <!-- Event search -->
+    <string name="search_action">Search</string>
+    <string name="search_hint">Search events</string>
+    <string name="search_back">Back</string>
+    <string name="search_clear">Clear</string>
+    <string name="search_idle_hint">Search your events by title, location or notes.</string>
+    <string name="search_empty">No events match “%1$s”.</string>
+
     <!-- Home-screen widgets -->
     <string name="widget_agenda_title">Upcoming</string>
     <string name="widget_agenda_label">Calendula agenda</string>

app/src/test/java/de/jeanlucmakiola/calendula/data/calendar/FakeCalendarDataSource.kt

@@ -16,6 +16,7 @@ internal class FakeCalendarDataSource : CalendarDataSource {
 
     var calendarsResult: List<CalendarSource> = emptyList()
     var instancesResult: (Long, Long) -> List<EventInstance> = { _, _ -> emptyList() }
+    var searchResult: (String) -> List<EventInstance> = { _ -> emptyList() }
     var eventDetailResult: (Long) -> EventDetail? = { null }
     var eventColorPaletteResult: (Long) -> List<EventColorOption> = { emptyList() }
     var exportableEventsResult: List<IcsEvent> = emptyList()
@@ -51,6 +52,7 @@ internal class FakeCalendarDataSource : CalendarDataSource {
     override fun calendars(): List<CalendarSource> = calendarsResult
     override fun instances(beginMillis: Long, endMillis: Long): List<EventInstance> =
         instancesResult(beginMillis, endMillis)
+    override fun searchEvents(query: String): List<EventInstance> = searchResult(query)
     override fun eventDetail(eventId: Long): EventDetail? = eventDetailResult(eventId)
     override fun eventColorPalette(calendarId: Long): List<EventColorOption> =
         eventColorPaletteResult(calendarId)