Implemented Swipe-to-Focus behavior for satellite passes

feature/passes/src/main/java/com/rtbishop/look4sat/feature/passes/PassesScreen.kt

@@ -17,6 +17,11 @@
  */
 package com.rtbishop.look4sat.feature.passes
 
+import androidx.compose.animation.AnimatedContent
+import androidx.compose.animation.core.tween
+import androidx.compose.animation.fadeIn
+import androidx.compose.animation.fadeOut
+import androidx.compose.animation.togetherWith
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
@@ -67,6 +72,7 @@ import com.rtbishop.look4sat.core.presentation.MainTheme
 import com.rtbishop.look4sat.core.presentation.NextPassRow
 import com.rtbishop.look4sat.core.presentation.R
 import com.rtbishop.look4sat.core.presentation.ScreenColumn
+import com.rtbishop.look4sat.core.presentation.SwipeableItem
 import com.rtbishop.look4sat.core.presentation.TimerRow
 import com.rtbishop.look4sat.core.presentation.TopBar
 import com.rtbishop.look4sat.core.presentation.infiniteMarquee
@@ -143,9 +149,11 @@ private fun PassesScreen(
             isRefreshing = uiState.isRefreshing,
             isUtc = uiState.isUtc,
             passes = uiState.itemsList,
+            groupedPasses = uiState.groupedPasses,
+            sunTimes = uiState.sunTimes,
+            focusedCatNum = uiState.focusedCatNum,
             navigateToRadar = navigateToRadar,
-            refreshPasses = { onAction(PassesAction.RefreshPasses) },
-            sunTimes = uiState.sunTimes
+            onAction = onAction
         )
     }
 }
@@ -156,33 +164,19 @@ private fun PassesList(
     isRefreshing: Boolean,
     isUtc: Boolean,
     passes: List<OrbitalPass>,
+    groupedPasses: Map<String, List<OrbitalPass>>,
+    sunTimes: Map<String, Pair<String, String>>,
+    focusedCatNum: Int?,
     navigateToRadar: (Int, Long) -> Unit,
-    refreshPasses: () -> Unit,
-    sunTimes: Map<String, Pair<String, String>>
+    onAction: (PassesAction) -> Unit
 ) {
     val isVerticalLayout = isVerticalLayout()
     val refreshState = rememberPullToRefreshState()
-    val timeZone = remember(isUtc) { if (isUtc) TimeZone.getTimeZone("UTC") else TimeZone.getDefault() }
-    val sdfDate = remember(isUtc) {
-        SimpleDateFormat("EEE, dd MMM yyyy", Locale.ENGLISH).also { it.timeZone = timeZone }
-    }
-
-    // Deep Space first, then date-grouped timed passes
-    val groupedPasses = remember(passes, isUtc) {
-        val ordered = LinkedHashMap<String, List<OrbitalPass>>()
-        val deepSpace = passes.filter { it.isDeepSpace }
-        if (deepSpace.isNotEmpty()) ordered["Deep Space"] = deepSpace
-        passes.filter { !it.isDeepSpace }
-            .groupByTo(LinkedHashMap()) { sdfDate.format(Date(it.aosTime)) }
-            .forEach { (k, v) -> ordered[k] = v }
-        ordered
-    }
-
     ElevatedCard(modifier = Modifier.fillMaxSize()) {
         PullToRefreshBox(
             isRefreshing = isRefreshing,
             state = refreshState,
-            onRefresh = refreshPasses,
+            onRefresh = { onAction(PassesAction.RefreshPasses) },
             indicator = {
                 PullToRefreshDefaults.Indicator(
                     state = refreshState,
@@ -196,20 +190,36 @@ private fun PassesList(
             if (passes.isEmpty()) {
                 EmptyListCard(message = stringResource(R.string.pass_empty_list_message))
             } else {
-                LazyVerticalGrid(columns = GridCells.Adaptive(320.dp), modifier = Modifier.fillMaxSize()) {
-                    for ((dateLabel, dayPasses) in groupedPasses) {
-                        stickyHeader(key = "header_$dateLabel") {
-                            val (rise, set) = sunTimes[dateLabel] ?: ("--:--" to "--:--")
-                            StickyDateHeader(label = dateLabel, sunriseTime = rise, sunsetTime = set)
-                        }
-                        items(items = dayPasses, key = { item -> item.catNum + item.aosTime }) { pass ->
-                            PassItem(
-                                pass = pass,
-                                navigateToRadar = navigateToRadar,
-                                modifier = Modifier.animateItem(),
-                                isVerticalLayout = isVerticalLayout,
-                                isUtc = isUtc
-                            )
+                AnimatedContent(
+                    targetState = focusedCatNum,
+                    transitionSpec = { fadeIn(tween(200)) togetherWith fadeOut(tween(200)) },
+                    label = "PassesFocusTransition"
+                ) { targetFocus ->
+                    LazyVerticalGrid(columns = GridCells.Adaptive(320.dp), modifier = Modifier.fillMaxSize()) {
+                        for ((dateLabel, dayPasses) in groupedPasses) {
+                            val headerVisible = targetFocus == null || dayPasses.any { it.catNum == targetFocus }
+                            if (headerVisible) {
+                                stickyHeader(key = "header_$dateLabel") {
+                                    val (rise, set) = sunTimes[dateLabel] ?: ("--:--" to "--:--")
+                                    StickyDateHeader(label = dateLabel, sunriseTime = rise, sunsetTime = set)
+                                }
+                            }
+                            val visiblePasses = if (targetFocus == null) dayPasses
+                            else dayPasses.filter { it.catNum == targetFocus }
+                            items(items = visiblePasses, key = { item -> item.catNum + item.aosTime }) { pass ->
+                                SwipeableItem(
+                                    onSwipeRight = { onAction(PassesAction.FocusCatNum(pass.catNum)) },
+                                    onSwipeLeft = { onAction(PassesAction.ClearFocus) }
+                                ) {
+                                    PassItem(
+                                        pass = pass,
+                                        navigateToRadar = navigateToRadar,
+                                        modifier = Modifier.animateItem(),
+                                        isVerticalLayout = isVerticalLayout,
+                                        isUtc = isUtc
+                                    )
+                                }
+                            }
                         }
                     }
                 }
@@ -361,13 +371,6 @@ private fun PassItem(
                     horizontalArrangement = Arrangement.Center,
                     verticalAlignment = Alignment.CenterVertically
                 ) {
-                    Icon(
-                        painter = painterResource(id = R.drawable.ic_altitude),
-                        contentDescription = null,
-                        modifier = Modifier.size(16.dp),
-                        tint = MaterialTheme.colorScheme.onSurface
-                    )
-                    Spacer(modifier = Modifier.width(4.dp))
                     Text(text = "${pass.altitude} km", fontSize = 15.sp, color = MaterialTheme.colorScheme.onSurface)
                 }
                 Row(

feature/passes/src/main/java/com/rtbishop/look4sat/feature/passes/PassesState.kt

@@ -32,9 +32,10 @@ data class PassesState(
     val showDeepSpace: Boolean = true,
     val modes: List<String> = emptyList(),
     val itemsList: List<OrbitalPass> = emptyList(),
+    val groupedPasses: Map<String, List<OrbitalPass>> = emptyMap(),
     val shouldSeeWhatsNew: Boolean = false,
-    // Map of dateLabel -> Pair(sunriseTime, sunsetTime) for each day group
-    val sunTimes: Map<String, Pair<String, String>> = emptyMap()
+    val sunTimes: Map<String, Pair<String, String>> = emptyMap(),
+    val focusedCatNum: Int? = null
 )
 
 sealed interface PassesAction {
@@ -44,4 +45,6 @@ sealed interface PassesAction {
     data object RefreshPasses : PassesAction
     data object TogglePassesDialog : PassesAction
     data object ToggleRadiosDialog : PassesAction
+    data class FocusCatNum(val catNum: Int) : PassesAction
+    data object ClearFocus : PassesAction
 }

feature/passes/src/main/java/com/rtbishop/look4sat/feature/passes/PassesViewModel.kt

@@ -74,37 +74,31 @@ class PassesViewModel(
                 _uiState.update { it.copy(isUtc = settings.stateOfUtc, shouldSeeWhatsNew = settings.shouldSeeWhatsNew) }
             }
         }
-        // Local tick loop — computes pass progress, countdown timer, and per-day sun times every second
+        // Main tick loop: reacts to new passes, then ticks every second
         viewModelScope.launch {
-            var lastSunTimesKey = "" // track when we need to recompute sun times
-            while (isActive) {
-                val timeNow = System.currentTimeMillis()
-                val isUtc = _uiState.value.isUtc
-                val showDeepSpace = _uiState.value.showDeepSpace
-                val allPasses = satelliteRepo.passes.value
-                val filtered = if (showDeepSpace) allPasses else allPasses.filter { !it.isDeepSpace }
-                val processed = computePassProgress(filtered, timeNow)
-                val (nextPass, nextTime, isAos) = resolveNextPass(processed, timeNow)
-
-                // Recompute per-day sun times only when passes list or UTC setting changes
-                val sunTimesKey = "${processed.firstOrNull()?.aosTime}-${processed.lastOrNull()?.aosTime}-$isUtc"
-                val sunTimes = if (sunTimesKey != lastSunTimesKey) {
-                    lastSunTimesKey = sunTimesKey
-                    computeSunTimes(processed, isUtc)
-                } else {
-                    _uiState.value.sunTimes
+            satelliteRepo.passes.collectLatest { allPasses ->
+                while (isActive) {
+                    val timeNow = System.currentTimeMillis()
+                    val isUtc = _uiState.value.isUtc
+                    val showDeepSpace = _uiState.value.showDeepSpace
+                    val filtered = allPasses
+                        .let { if (showDeepSpace) it else it.filter { pass -> !pass.isDeepSpace } }
+                    val processed = computePassProgress(filtered, timeNow)
+                    val (nextPass, nextTime, isAos) = resolveNextPass(processed, timeNow)
+                    val sunTimes = computeSunTimes(processed, isUtc)
+                    val grouped = groupPasses(processed, isUtc)
+                    _uiState.update {
+                        it.copy(
+                            itemsList = processed,
+                            groupedPasses = grouped,
+                            sunTimes = sunTimes,
+                            nextPass = nextPass,
+                            nextTime = nextTime,
+                            isNextTimeAos = isAos
+                        )
+                    }
+                    delay(1000)
                 }
-
-                _uiState.update {
-                    it.copy(
-                        itemsList = processed,
-                        nextPass = nextPass,
-                        nextTime = nextTime,
-                        isNextTimeAos = isAos,
-                        sunTimes = sunTimes
-                    )
-                }
-                delay(1000)
             }
         }
     }
@@ -121,22 +115,24 @@ class PassesViewModel(
                 _uiState.update { it.copy(isPassesDialogShown = !it.isPassesDialogShown) }
             PassesAction.ToggleRadiosDialog ->
                 _uiState.update { it.copy(isRadiosDialogShown = !it.isRadiosDialogShown) }
+            is PassesAction.FocusCatNum -> _uiState.update { it.copy(focusedCatNum = action.catNum) }
+            PassesAction.ClearFocus -> _uiState.update { it.copy(focusedCatNum = null) }
         }
     }
 
-    // Computes sunrise/sunset strings for each unique calendar day in the pass list, plus today for Deep Space
+    // Computes sunrise/sunset strings for each unique calendar day in the pass list, plus today for DeepSpace
     private fun computeSunTimes(passes: List<OrbitalPass>, isUtc: Boolean): Map<String, Pair<String, String>> {
         val stationPos = settingsRepo.stationPosition.value
         val tz = if (isUtc) TimeZone.getTimeZone("UTC") else TimeZone.getDefault()
         val sdfDate = SimpleDateFormat("EEE, dd MMM yyyy", Locale.ENGLISH).also { it.timeZone = tz }
         val sdfTime = SimpleDateFormat("HH:mm", Locale.ENGLISH).also { it.timeZone = tz }
         val result = LinkedHashMap<String, Pair<String, String>>()
-        // Deep Space group always shows today's sun times
+        // DeepSpace group always shows today's sun times
         if (passes.any { it.isDeepSpace }) {
             val riseSet = CelestialComputer.findSunRiseSet(stationPos, System.currentTimeMillis())
             val rise = if (riseSet.riseTimeMillis > 0) sdfTime.format(Date(riseSet.riseTimeMillis)) else "--:--"
             val set = if (riseSet.setTimeMillis > 0) sdfTime.format(Date(riseSet.setTimeMillis)) else "--:--"
-            result["Deep Space"] = rise to set
+            result["DeepSpace (period >225min)"] = rise to set
         }
         for (pass in passes) {
             if (pass.isDeepSpace) continue
@@ -150,6 +146,18 @@ class PassesViewModel(
         return result
     }
 
+    private fun groupPasses(passes: List<OrbitalPass>, isUtc: Boolean): Map<String, List<OrbitalPass>> {
+        val tz = if (isUtc) TimeZone.getTimeZone("UTC") else TimeZone.getDefault()
+        val sdfDate = SimpleDateFormat("EEE, dd MMM yyyy", Locale.ENGLISH).also { it.timeZone = tz }
+        val ordered = LinkedHashMap<String, List<OrbitalPass>>()
+        val deepSpace = passes.filter { it.isDeepSpace }
+        if (deepSpace.isNotEmpty()) ordered["DeepSpace (period >225min)"] = deepSpace
+        passes.filter { !it.isDeepSpace }
+            .groupByTo(LinkedHashMap()) { sdfDate.format(Date(it.aosTime)) }
+            .forEach { (k, v) -> ordered[k] = v }
+        return ordered
+    }
+
     /** Computes live progress for each pass, filtering out expired ones. */
     private fun computePassProgress(passList: List<OrbitalPass>, time: Long): List<OrbitalPass> {
         val result = ArrayList<OrbitalPass>(passList.size)