Autofocus race condition with UI

app/src/main/java/net/helcel/cowspent/android/bill_edit/EditBillScreen.kt

@@ -63,11 +63,17 @@ fun EditBillScreen(
     val context = LocalContext.current
     val focusRequester = remember { FocusRequester() }
 
-    LaunchedEffect(Unit) {
+    // The activity reads the project off the main thread and only then reports whether this is a
-        if (viewModel.isNewBill) {
+    // new bill, so the flag arrives after the first composition. Keying on it rather than on Unit
+    // is what makes the effect run at all.
+    LaunchedEffect(viewModel.isNewBill) {
+        if (!viewModel.isNewBill) return@LaunchedEffect
+        // The field has to be laid out before it can take focus, which is not yet true on the
+        // pass that composed it. Waiting for the next frame makes this hold whether the flag was
+        // already set or arrived later.
+        withFrameNanos { }
         focusRequester.requestFocus()
     }
-    }
 
     StatefulAlertDialog(
         state = viewModel.dialogState,
@@ -252,8 +258,8 @@ fun BillBasicInfoSection(
         placeholder = { Text(stringResource(R.string.label_what)) },
         modifier = Modifier.fillMaxWidth(),
         leadingIcon = { Icon(Icons.Default.Title, contentDescription = null) },
-        keyboardOptions = KeyboardOptions(imeAction = ImeAction.Next),
+        keyboardOptions = KeyboardOptions(imeAction = ImeAction.Done),
-        keyboardActions = KeyboardActions(onNext = { focusManager.moveFocus(FocusDirection.Next) })
+        keyboardActions = KeyboardActions(onDone = { focusManager.clearFocus() })
     )
 
     Spacer(modifier = Modifier.height(8.dp))
@@ -528,7 +534,10 @@ fun BillAdditionalDetailsSection(
     val context = LocalContext.current
     var categoryExpanded by remember { mutableStateOf(false) }
     val selectedCategory =
-        categories.find { it.id == viewModel.categoryId } ?: CategoryUtils.getCategoryById(context, viewModel.categoryId)
+        categories.find { it.id == viewModel.categoryId } ?: CategoryUtils.getCategoryById(
+            context,
+            viewModel.categoryId
+        )
 
     EditableExposedDropdownMenu(
         value = selectedCategory?.name ?: "",
@@ -582,7 +591,10 @@ fun BillAdditionalDetailsSection(
 
     var pmExpanded by remember { mutableStateOf(false) }
     val selectedPm =
-        paymentModes.find { it.id == viewModel.paymentModeId } ?: CategoryUtils.getPaymentModeById(context, viewModel.paymentModeId)
+        paymentModes.find { it.id == viewModel.paymentModeId } ?: CategoryUtils.getPaymentModeById(
+            context,
+            viewModel.paymentModeId
+        )
 
     EditableExposedDropdownMenu(
         value = selectedPm?.name ?: "",

app/src/main/java/net/helcel/cowspent/android/main/BillsListComponents.kt

@@ -3,6 +3,9 @@ package net.helcel.cowspent.android.main
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.ColumnScope
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.material.CircularProgressIndicator
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -69,13 +72,43 @@ fun EmptyProjectsState(onConfigureNextcloud: () -> Unit, onAddManually: () -> Un
     }
 }
 
+/**
+ * A full-height, centred state that a pull to refresh can still act on.
+ *
+ * PullRefresh reads the gesture from a nested scroll source, and a plain Column offers none - so
+ * on an empty list, which is exactly when a refresh is wanted most, the pull never fires. A
+ * single-item LazyColumn has nowhere to scroll but does provide that source.
+ */
+@Composable
+private fun RefreshableFullScreenState(content: @Composable ColumnScope.() -> Unit) {
+    LazyColumn(modifier = Modifier.fillMaxSize()) {
+        item {
+            Column(
+                modifier = Modifier.fillParentMaxSize().padding(16.dp),
+                verticalArrangement = Arrangement.Center,
+                horizontalAlignment = Alignment.CenterHorizontally,
+                content = content
+            )
+        }
+    }
+}
+
+@Composable
+fun LoadingBillsState() {
+    RefreshableFullScreenState {
+        CircularProgressIndicator()
+        Spacer(modifier = Modifier.height(16.dp))
+        Text(
+            text = stringResource(R.string.error_loading),
+            style = MaterialTheme.typography.subtitle1,
+            color = MaterialTheme.colors.onSurface.copy(alpha = 0.6f)
+        )
+    }
+}
+
 @Composable
 fun EmptyMembersState() {
-    Column(
+    RefreshableFullScreenState {
-        modifier = Modifier.fillMaxSize().padding(16.dp),
-        verticalArrangement = Arrangement.Center,
-        horizontalAlignment = Alignment.CenterHorizontally
-    ) {
         Text(
             text = stringResource(R.string.error_no_members).uppercase(), 
             style = MaterialTheme.typography.subtitle1, 
@@ -94,11 +127,7 @@ fun EmptyMembersState() {
 
 @Composable
 fun EmptyBillsState() {
-    Column(
+    RefreshableFullScreenState {
-        modifier = Modifier.fillMaxSize().padding(16.dp),
-        verticalArrangement = Arrangement.Center,
-        horizontalAlignment = Alignment.CenterHorizontally
-    ) {
         Text(
             text = stringResource(R.string.error_no_bills).uppercase(), 
             style = MaterialTheme.typography.subtitle1, 
@@ -203,11 +232,7 @@ fun SectionHeader(title: String) {
 
 @Composable
 fun EmptyState() {
-    Column(
+    RefreshableFullScreenState {
-        modifier = Modifier.fillMaxSize(),
-        verticalArrangement = Arrangement.Center,
-        horizontalAlignment = Alignment.CenterHorizontally
-    ) {
         Text(
             text = stringResource(R.string.error_no_bills).uppercase(), 
             style = MaterialTheme.typography.subtitle1, 

app/src/main/java/net/helcel/cowspent/android/main/BillsListScreen.kt

@@ -105,9 +105,9 @@ fun BillsListScreen(
     val context = LocalContext.current
     val sharedPreferences = remember { PreferenceManager.getDefaultSharedPreferences(context) }
     val showArchived = sharedPreferences.getBoolean(stringResource(R.string.pref_key_show_archived), false)
-    val keyBetaFeatures = stringResource(R.string.pref_key_beta_features)
+    val keyExtraFeatures = stringResource(R.string.pref_key_extra_features)
-    var showBetaFeatures by remember(keyBetaFeatures) {
+    var showExtraFeatures by remember(keyExtraFeatures) {
-        mutableStateOf(sharedPreferences.getBoolean(keyBetaFeatures, false))
+        mutableStateOf(sharedPreferences.getBoolean(keyExtraFeatures, false))
     }
 
     StatefulAlertDialog(
@@ -165,7 +165,7 @@ fun BillsListScreen(
                 projectType = proj?.type ?: ProjectType.LOCAL,
                 accessLevel = proj?.myAccessLevel ?: DBProject.ACCESS_LEVEL_ADMIN,
                 isShareable = proj?.isShareable() ?: true,
-                showBetaFeatures = showBetaFeatures
+                showExtraFeatures = showExtraFeatures
             )
         }
     }
@@ -334,7 +334,7 @@ fun BillsListScreen(
                 },
                 actions = {
                     if (!isSearchExpanded) {
-                        if (showBetaFeatures && viewModel.hasUnlabeledBills) {
+                        if (showExtraFeatures && viewModel.hasUnlabeledBills) {
                             IconButton(onClick = onLabelBillsClick) {
                                 Icon(
                                     Icons.Default.Category,
@@ -409,6 +409,10 @@ fun BillsListScreen(
             when {
                 viewModel.showNoProjects -> EmptyProjectsState(onAccountSwitcherClick, onAddProjectClick)
                 viewModel.showNoMembers -> EmptyMembersState()
+                // A large project takes a long time on its first sync. Until that finishes there
+                // is nothing stored for it yet, and reporting that as "no bills" tells the user
+                // the project is empty when it is still downloading.
+                viewModel.isRefreshing && viewModel.bills.isEmpty() -> LoadingBillsState()
                 viewModel.showNoBills -> EmptyBillsState()
                 viewModel.bills.isEmpty() -> EmptyState()
                 else -> {

app/src/main/java/net/helcel/cowspent/android/main/BillsListViewActivity.kt

@@ -94,14 +94,16 @@ class BillsListViewActivity :
     private val syncCallBack = object : ICallback {
         override fun onFinish() {
             mActionMode?.finish()
-            refreshLists()
             viewModel.isRefreshing = false
+            refreshLists()
         }
 
         override fun onFinish(result: String, message: String) {}
 
         override fun onScheduled() {
-            viewModel.isRefreshing = false
+            // Being queued is not being done. Clearing the indicator here stops the spinner while a
+            // large project is still downloading; synchronize() already releases it when nothing
+            // actually started.
         }
     }
 
@@ -780,7 +782,7 @@ class BillsListViewActivity :
 
         // The account and all-projects refresh belongs to opening the app, throttled by the
         // SyncOnOpen interval so that resuming within the interval does not repeat it.
-        val intervalMinutes = SyncSettings.intervalMinutes(applicationContext)
+        val intervalMinutes = SyncSettings.OPEN_SYNC_INTERVAL_MINUTES
         val lastAccountSync = preferences.getLong(getString(R.string.pref_key_last_account_sync_timestamp), 0L)
         val accountSyncDue = trigger == SyncTrigger.APP_OPEN &&
             now - lastAccountSync > intervalMinutes * 60 * 1000L
@@ -788,11 +790,23 @@ class BillsListViewActivity :
         lifecycleScope.launch {
             val remoteProjects = withContext(Dispatchers.IO) { db.projects }
                 .filter { !it.isLocal && !it.isArchived }
+                // Only the first one scheduled actually starts - the rest queue behind it - and it
+                // takes the screen's callback with it. So the selected project goes first: otherwise
+                // the spinner follows a project the user is not looking at, stops when that one
+                // finishes, and theirs is reported as empty while it is still waiting its turn.
+                .sortedByDescending { it.id == selectedProjectId }
 
             viewModel.isRefreshing = true
             db.cowspentServerSyncHelper.addCallbackPull(syncCallBack)
 
             val started = if (accountSyncDue) {
+                // The pass is throttled by this stamp, so it has to be written here rather than
+                // left to the account sync: that only runs when an account is configured and only
+                // records itself on success, so without one the stamp stayed at zero and the pass
+                // repeated on every single resume, re-scheduling every project each time.
+                preferences.edit {
+                    putLong(getString(R.string.pref_key_last_account_sync_timestamp), now)
+                }
                 if (CowspentServerSyncHelper.isNextcloudAccountConfigured(applicationContext)) {
                     db.cowspentServerSyncHelper.runAccountProjectsSync()
                 }
@@ -804,14 +818,24 @@ class BillsListViewActivity :
             } else {
                 val selectedProj = remoteProjects.find { it.id == selectedProjectId }
                 val lastSync = preferences.getLong(lastProjectSyncKey(selectedProjectId), 0L)
-                val due = trigger == SyncTrigger.MANUAL ||
+                // The pull writes the project cursor only after it has applied everything, so a cursor
+                // still at zero means no sync ever finished and nothing is stored locally.
+                // Throttling that strands the user on an empty list with no spinner - which is what
+                // the back gesture does to a large project, since it destroys the activity while
+                // the sync is still running. IHateMoney never advances the cursor, so the interval
+                // stays in charge there.
+                val neverCompleted = selectedProj != null &&
+                    selectedProj.type != ProjectType.IHATEMONEY &&
+                    (selectedProj.lastSyncedTimestamp ?: 0L) == 0L
+                val due = trigger == SyncTrigger.MANUAL || neverCompleted ||
                     now - lastSync > SELECTED_PROJECT_SYNC_INTERVAL_MS
+                val fullSync = trigger == SyncTrigger.MANUAL &&
+                    !partialRefreshPreferred(preferences, selectedProjectId, now)
                 if (selectedProj != null && due &&
-                    db.cowspentServerSyncHelper.scheduleSync(
+                    db.cowspentServerSyncHelper.scheduleSync(false, selectedProj, fullSync) != null
-                        false, selectedProj, trigger == SyncTrigger.MANUAL
-                    ) != null
                 ) {
                     markProjectSynced(preferences, selectedProj.id, now)
+                    if (fullSync) markFullySynced(preferences, selectedProj.id, now)
                     1
                 } else 0
             }
@@ -823,6 +847,33 @@ class BillsListViewActivity :
     }
 
     private fun lastProjectSyncKey(projectId: Long) = "lastProjectSyncTimestamp_$projectId"
+    private fun lastFullSyncKey(projectId: Long) = "lastFullSyncTimestamp_$projectId"
+
+    private fun markFullySynced(preferences: SharedPreferences, projectId: Long, at: Long) {
+        preferences.edit { putLong(lastFullSyncKey(projectId), at) }
+    }
+
+    /**
+     * Whether a pull to refresh should settle for the cheaper paged walk.
+     *
+     * A refresh by hand normally re-downloads the whole project, which is what makes it a usable
+     * repair when the local copy looks wrong. On a large project that is expensive to repeat, so
+     * with beta features on a refresh that follows a recent full one walks the recent pages
+     * instead - the common case of pulling twice in a row costs a page rather than the project.
+     */
+    private fun partialRefreshPreferred(
+        preferences: SharedPreferences,
+        projectId: Long,
+        now: Long
+    ): Boolean {
+        if (!preferences.getBoolean(getString(R.string.pref_key_extra_features), false)) return false
+        // "Always" means what it says: every manual refresh is a full sync.
+        val delayMinutes = SyncSettings.fullSyncDelayMinutes(applicationContext)
+        if (delayMinutes == 0) return false
+        val lastFull = preferences.getLong(lastFullSyncKey(projectId), 0L)
+        if (lastFull == 0L) return false
+        return now - lastFull < delayMinutes * 60 * 1000L
+    }
     private fun markProjectSynced(preferences: SharedPreferences, projectId: Long, at: Long) {
         preferences.edit { putLong(lastProjectSyncKey(projectId), at) }
     }

app/src/main/java/net/helcel/cowspent/android/project/ProjectImportHelper.kt

@@ -11,11 +11,30 @@ import net.helcel.cowspent.R
 import net.helcel.cowspent.model.*
 import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
 import java.io.InputStreamReader
+import java.net.URLDecoder
 import java.text.SimpleDateFormat
 import java.util.*
 
 object ProjectImportHelper {
 
+    private fun optional(line: Array<String>, columns: Map<String, Int>, name: String): String =
+        columns[name]?.takeIf { it < line.size }?.let { line[it] } ?: ""
+
+    /** Parses the `#rrggbb` member colour Cospend writes in its members section. */
+    private fun parseHexColor(value: String): Triple<Int, Int, Int>? {
+        val hex = value.trim().removePrefix("#")
+        if (hex.length != 6) return null
+        return try {
+            Triple(
+                hex.substring(0, 2).toInt(16),
+                hex.substring(2, 4).toInt(16),
+                hex.substring(4, 6).toInt(16)
+            )
+        } catch (_: NumberFormatException) {
+            null
+        }
+    }
+
     @SuppressLint("Range")
     fun getFileName(contentResolver: ContentResolver, uri: Uri): String {
         var result: String? = null
@@ -59,6 +78,7 @@ object ProjectImportHelper {
             val bills = mutableListOf<DBBill>()
             val membersActive = mutableMapOf<String, Boolean>()
             val membersWeight = mutableMapOf<String, Double>()
+            val membersColor = mutableMapOf<String, Triple<Int, Int, Int>>()
             val billRemoteIdToPayerName = mutableMapOf<Long, String>()
             val billRemoteIdToOwerStr = mutableMapOf<Long, String>()
             
@@ -76,7 +96,10 @@ object ProjectImportHelper {
                     
                     currentSection = when {
                         columns.containsKey("what") && columns.containsKey("amount") -> "bills"
+                        columns.containsKey("name") && columns.containsKey("weight") &&
+                                columns.containsKey("active") -> "members"
                         columns.containsKey("categoryid") && columns.containsKey("categoryname") -> "categories"
+                        columns.containsKey("paymentmodeid") && columns.containsKey("paymentmodename") -> "paymentmodes"
                         columns.containsKey("exchange_rate") && columns.containsKey("currencyname") -> "currencies"
                         else -> {
                             onError(context.getString(R.string.import_error_header, row))
@@ -86,11 +109,19 @@ object ProjectImportHelper {
                 } else {
                     previousLineEmpty = false
                     when (currentSection) {
+                        "members" -> {
+                            val name = line[columns["name"]!!].trim()
+                            if (name.isNotEmpty()) {
+                                membersWeight[name] = optional(line, columns, "weight").toDoubleOrNull() ?: 1.0
+                                membersActive[name] = optional(line, columns, "active") != "0"
+                                parseHexColor(optional(line, columns, "color"))?.let { membersColor[name] = it }
+                            }
+                        }
                         "categories" -> {
-                            categories.add(DBCategory(0, line[columns["categoryid"]!!].toLong(), 0, line[columns["categoryname"]!!], line[columns["icon"]!!], line[columns["color"]!!]))
+                            categories.add(DBCategory(0, line[columns["categoryid"]!!].toLong(), 0, line[columns["categoryname"]!!], optional(line, columns, "icon"), optional(line, columns, "color")))
                         }
                         "paymentmodes" -> {
-                            paymentModes.add(DBPaymentMode(0, line[columns["categoryid"]!!].toLong(), 0, line[columns["categoryname"]!!], line[columns["icon"]!!], line[columns["color"]!!]))
+                            paymentModes.add(DBPaymentMode(0, line[columns["paymentmodeid"]!!].toLong(), 0, line[columns["paymentmodename"]!!], optional(line, columns, "icon"), optional(line, columns, "color")))
                         }
                         "currencies" -> {
                             val name = line[columns["currencyname"]!!]
@@ -100,7 +131,22 @@ object ProjectImportHelper {
                         }
                         "bills" -> {
                             val what = if (columns.containsKey("what")) line[columns["what"]!!] else ""
-                            val comment = if (columns.containsKey("comment")) line[columns["comment"]!!] else ""
+                            // Cospend url-encodes bill comments on export and marks trashed
+                            // bills with a "deleted" column no other dialect has, so that column
+                            // doubles as the marker for which comment encoding to expect.
+                            val cospendDialect = columns.containsKey("deleted")
+                            val comment = if (columns.containsKey("comment")) {
+                                val raw = line[columns["comment"]!!]
+                                if (cospendDialect) {
+                                    try {
+                                        URLDecoder.decode(raw, "UTF-8")
+                                    } catch (_: Exception) {
+                                        raw
+                                    }
+                                } else raw
+                            } else ""
+                            val deleted = cospendDialect &&
+                                    line[columns["deleted"]!!].trim().let { it.isNotEmpty() && it != "0" }
                             val amount = if (columns.containsKey("amount")) line[columns["amount"]!!].toDouble() else 0.0
                             val timestamp: Long = when {
                                 columns.containsKey("timestamp") -> line[columns["timestamp"]!!].toLong()
@@ -121,6 +167,11 @@ object ProjectImportHelper {
                             val catId = if (columns.containsKey("categoryid") && line[columns["categoryid"]!!].isNotEmpty()) line[columns["categoryid"]!!].toLong() else 0L
                             val pmId = if (columns.containsKey("paymentmodeid") && line[columns["paymentmodeid"]!!].isNotEmpty()) line[columns["paymentmodeid"]!!].toLong() else 0L
                             val pm = if (columns.containsKey("paymentmode")) line[columns["paymentmode"]!!] else null
+                            // MoneyBuster's export only carries the legacy one-letter payment
+                            // mode. Everything downstream keys off paymentModeId, so translate
+                            // it back the same way the sync parser does.
+                            val effectivePmId =
+                                if (pmId != 0L) pmId else DBBill.oldPmIdToNew[pm] ?: DBBill.PAYMODE_ID_NONE
 
                             if (payerName.isNotEmpty()) {
                                 membersActive[payerName] = payerActive
@@ -132,7 +183,7 @@ object ProjectImportHelper {
                                 return
                             }
                             
-                            if (what != "deleteMeIfYouWant") {
+                            if (what != "deleteMeIfYouWant" && !deleted) {
                                 billRemoteIdToOwerStr[row.toLong()] = owersStr
                                 val owersArray = owersStr.split(",").map { it.trim() }.filter { it.isNotEmpty() }
                                 for (ower in owersArray) {
@@ -140,7 +191,7 @@ object ProjectImportHelper {
                                         membersWeight[ower] = 1.0
                                     }
                                 }
-                                bills.add(DBBill(0, row.toLong(), 0, 0, amount, timestamp, what, DBBill.STATE_OK, "n", pm, catId, comment, pmId))
+                                bills.add(DBBill(0, row.toLong(), 0, 0, amount, timestamp, what, DBBill.STATE_OK, "n", pm, catId, comment, effectivePmId))
                                 billRemoteIdToPayerName[row.toLong()] = payerName
                             }
                         }
@@ -168,13 +219,20 @@ object ProjectImportHelper {
             currencies.forEach { db.addCurrency(DBCurrency(0, 0, pid, it.name, it.exchangeRate, DBBill.STATE_OK)) }
             
             membersWeight.keys.forEach { mName ->
-                memberNameToId[mName] = db.addMember(DBMember(0, 0, pid, mName, membersActive[mName] ?: true, membersWeight[mName] ?: 1.0, DBBill.STATE_OK, null, null, null, null, null))
+                val c = membersColor[mName]
+                memberNameToId[mName] = db.addMember(DBMember(0, 0, pid, mName, membersActive[mName] ?: true, membersWeight[mName] ?: 1.0, DBBill.STATE_OK, c?.first, c?.second, c?.third, null, null))
             }
             
             bills.forEach { b ->
                 val payerId = memberNameToId[billRemoteIdToPayerName[b.remoteId]] ?: 0L
-                val localCatId = catRemoteToLocal[b.categoryId] ?: 0L
+                // Only custom labels are listed in the categories/paymentmodes sections. Built-in
-                val localPmId = pmRemoteToLocal[b.paymentModeId] ?: 0L
+                // ones are referenced by their (negative) constant, which the UI resolves on its
+                // own, so those have to be kept rather than reset to "none". Unmapped positive
+                // ids are dropped instead, as they would collide with local ids.
+                val localCatId = catRemoteToLocal[b.categoryId]
+                    ?: b.categoryId.takeIf { it < 0 } ?: 0L
+                val localPmId = pmRemoteToLocal[b.paymentModeId]
+                    ?: b.paymentModeId.takeIf { it < 0 } ?: 0L
                 val billId = db.addBill(DBBill(0, 0, pid, payerId, b.amount, b.timestamp, b.what, DBBill.STATE_OK, b.repeat, b.paymentMode, localCatId, b.comment, localPmId))
                 billRemoteIdToOwerStr[b.remoteId]?.split(",")?.map { it.trim() }?.filter { it.isNotEmpty() }?.forEach { ower ->
                     memberNameToId[ower]?.let { owerId -> db.addBillower(billId, owerId) }

app/src/main/java/net/helcel/cowspent/android/project/ProjectOptionsDialog.kt

@@ -36,7 +36,7 @@ fun ProjectOptionsDialogContent(
     projectType: ProjectType = ProjectType.LOCAL,
     accessLevel: Int = DBProject.ACCESS_LEVEL_ADMIN,
     isShareable: Boolean = true,
-    showBetaFeatures: Boolean = false
+    showExtraFeatures: Boolean = false
 ) {
     Surface(
         shape = MaterialTheme.shapes.large,
@@ -80,7 +80,7 @@ fun ProjectOptionsDialogContent(
             // Row 2: Manage Member, Manage Labels, Manage Currencies
             if (!isArchived && isMaintainer) {
                 row2.add(ProjectOption(stringResource(R.string.action_members), Icons.Default.Group, onManageMembers))
-                if (showBetaFeatures && (projectType == ProjectType.LOCAL || projectType == ProjectType.COSPEND)) {
+                if (showExtraFeatures && (projectType == ProjectType.LOCAL || projectType == ProjectType.COSPEND)) {
                     row2.add(ProjectOption(stringResource(R.string.action_labels), Icons.AutoMirrored.Filled.Label, onManageLabels))
                 }
                 row2.add(ProjectOption(stringResource(R.string.action_currencies), Icons.Default.MonetizationOn, onManageCurrencies))
@@ -183,7 +183,7 @@ fun ProjectOptionsDialogPreview() {
             projectType = ProjectType.COSPEND,
             accessLevel = DBProject.ACCESS_LEVEL_ADMIN,
             isShareable = true,
-            showBetaFeatures = true
+            showExtraFeatures = true
         )
     }
 }
@@ -208,7 +208,7 @@ fun ProjectOptionsDialogPreview2() {
             projectType = ProjectType.COSPEND,
             accessLevel = DBProject.ACCESS_LEVEL_ADMIN,
             isShareable = true,
-            showBetaFeatures = true
+            showExtraFeatures = true
         )
     }
 }
@@ -232,7 +232,7 @@ fun ProjectOptionsDialogPreview3() {
             projectType = ProjectType.LOCAL,
             accessLevel = DBProject.ACCESS_LEVEL_ADMIN,
             isShareable = true,
-            showBetaFeatures = true
+            showExtraFeatures = true
         )
     }
 }

app/src/main/java/net/helcel/cowspent/android/settings/SettingsScreen.kt

@@ -84,9 +84,9 @@ fun SettingsScreen(
     val keyColor = stringResource(R.string.pref_key_color)
     val keyOfflineMode = stringResource(R.string.pref_key_offline_mode)
     val keyShowArchived = stringResource(R.string.pref_key_show_archived)
-    val keyBetaFeatures = stringResource(R.string.pref_key_beta_features)
+    val keyExtraFeatures = stringResource(R.string.pref_key_extra_features)
     val keyStatsIncludeDeactivated = stringResource(R.string.pref_key_stats_include_deactivated)
-    val keyAutoSyncOnOpen = stringResource(R.string.pref_key_auto_sync_on_open)
+    val keyFullSyncDelay = stringResource(R.string.pref_key_full_sync_delay)
     val keyFillNewBillFromLast = stringResource(R.string.pref_key_fill_new_bill_from_last)
     val keyLastAccountSync = stringResource(R.string.pref_key_last_account_sync_timestamp)
 
@@ -128,8 +128,8 @@ fun SettingsScreen(
     var showArchived by remember(keyShowArchived) {
         mutableStateOf(sharedPreferences.getBoolean(keyShowArchived, false))
     }
-    var betaFeatures by remember(keyBetaFeatures) {
+    var extraFeatures by remember(keyExtraFeatures) {
-        mutableStateOf(sharedPreferences.getBoolean(keyBetaFeatures, false))
+        mutableStateOf(sharedPreferences.getBoolean(keyExtraFeatures, false))
     }
     var fillNewBillFromLast by remember(keyFillNewBillFromLast) {
         mutableStateOf(sharedPreferences.getBoolean(keyFillNewBillFromLast, false))
@@ -138,16 +138,16 @@ fun SettingsScreen(
         mutableStateOf(sharedPreferences.getBoolean(keyStatsIncludeDeactivated, false))
     }
     
-    val syncIntervals = SyncSettings.INTERVAL_CHOICES_MINUTES
+    val fullSyncDelays = SyncSettings.FULL_SYNC_DELAY_CHOICES_MINUTES
-    val syncIntervalLabels = listOf(
+    val fullSyncDelayLabels = listOf(
-        stringResource(R.string.pref_value_sync_1m),
+        stringResource(R.string.pref_value_sync_always),
-        stringResource(R.string.pref_value_sync_10m),
         stringResource(R.string.pref_value_sync_1h),
-        stringResource(R.string.pref_value_sync_1d)
+        stringResource(R.string.pref_value_sync_1d),
+        stringResource(R.string.pref_value_sync_1w)
     )
 
-    var syncInterval by remember(keyAutoSyncOnOpen) {
+    var fullSyncDelay by remember(keyFullSyncDelay) {
-        mutableIntStateOf(SyncSettings.intervalMinutes(context))
+        mutableIntStateOf(SyncSettings.fullSyncDelayMinutes(context))
     }
 
     Scaffold(
@@ -173,28 +173,6 @@ fun SettingsScreen(
             // Appearance
             SettingsCategory(stringResource(R.string.settings_appearance))
 
-            SettingsSwitchPreference(
-                title = stringResource(R.string.settings_show_archived),
-                icon = Icons.Default.Archive,
-                checked = showArchived,
-                onCheckedChange = {
-                    showArchived = it
-                    sharedPreferences.edit {
-                        putBoolean(keyShowArchived, it)
-                        if (!it) {
-                            val selectedProjectId = sharedPreferences.getLong("selected_project", 0)
-                            if (selectedProjectId != 0L) {
-                                val db = CowspentSQLiteOpenHelper.getInstance(context)
-                                val project = db.getProject(selectedProjectId)
-                                if (project?.isArchived == true) {
-                                    putLong("selected_project", 0)
-                                }
-                            }
-                        }
-                    }
-                }
-            )
-
             SettingsListPreference(
                 title = stringResource(R.string.settings_night_mode),
                 icon = Icons.Default.Brightness2,
@@ -283,19 +261,41 @@ fun SettingsScreen(
             SettingsCategory(stringResource(R.string.settings_other))
 
             SettingsSwitchPreference(
-                title = stringResource(R.string.settings_beta_features),
+                title = stringResource(R.string.settings_extra_features),
-                summary = stringResource(R.string.settings_beta_features_summary),
+                summary = stringResource(R.string.settings_extra_features_summary),
                 icon = Icons.Default.Info,
-                checked = betaFeatures,
+                checked = extraFeatures,
                 onCheckedChange = {
-                    betaFeatures = it
+                    extraFeatures = it
                     sharedPreferences.edit {
-                        putBoolean(keyBetaFeatures, it)
+                        putBoolean(keyExtraFeatures, it)
+                    }
+                }
+            )
+
+            if (extraFeatures) {
+                SettingsSwitchPreference(
+                    title = stringResource(R.string.settings_show_archived),
+                    icon = Icons.Default.Archive,
+                    checked = showArchived,
+                    onCheckedChange = {
+                        showArchived = it
+                        sharedPreferences.edit {
+                            putBoolean(keyShowArchived, it)
+                            if (!it) {
+                                val selectedProjectId = sharedPreferences.getLong("selected_project", 0)
+                                if (selectedProjectId != 0L) {
+                                    val db = CowspentSQLiteOpenHelper.getInstance(context)
+                                    val project = db.getProject(selectedProjectId)
+                                    if (project?.isArchived == true) {
+                                        putLong("selected_project", 0)
+                                    }
+                                }
+                            }
                         }
                     }
                 )
 
-            if (betaFeatures) {
                 SettingsSwitchPreference(
                     title = stringResource(R.string.settings_fill_new_bill_from_last),
                     summary = stringResource(R.string.settings_fill_new_bill_from_last_summary),
@@ -322,18 +322,18 @@ fun SettingsScreen(
                 )
 
                 SettingsSliderPreference(
-                    title = stringResource(R.string.settings_auto_sync_on_open),
+                    title = stringResource(R.string.settings_full_sync_delay),
-                    summary = stringResource(R.string.settings_auto_sync_on_open_summary),
+                    summary = stringResource(R.string.settings_full_sync_delay_summary),
                     icon = Icons.Default.Sync,
-                    value = syncInterval,
+                    value = fullSyncDelay,
-                    values = syncIntervals,
+                    values = fullSyncDelays,
-                    labels = syncIntervalLabels,
+                    labels = fullSyncDelayLabels,
-                    onValueChange = { newInterval ->
+                    onValueChange = { newDelay ->
                         // Slider reports every drag delta, not just the snapped steps.
-                        if (newInterval != syncInterval) {
+                        if (newDelay != fullSyncDelay) {
-                            syncInterval = newInterval
+                            fullSyncDelay = newDelay
                             sharedPreferences.edit {
-                                putInt(keyAutoSyncOnOpen, newInterval)
+                                putInt(keyFullSyncDelay, newDelay)
                             }
                         }
                     }

app/src/main/java/net/helcel/cowspent/persistence/CowspentSQLiteOpenHelper.kt

@@ -448,6 +448,26 @@ class CowspentSQLiteOpenHelper private constructor(val context: Context) :
 
     // --- Bills logic ---
 
+    /**
+     * Runs [block] as one database transaction.
+     *
+     * Every write here commits on its own otherwise, which for a sync means a committed
+     * transaction per bill and another per ower - the dominant cost of a large project's first
+     * sync. Callers batch in chunks rather than wrapping everything: a sync interrupted halfway
+     * then keeps the chunks it already committed instead of rolling the lot back.
+     */
+    fun <T> inTransaction(block: () -> T): T {
+        val db = writableDatabase
+        db.beginTransaction()
+        try {
+            val result = block()
+            db.setTransactionSuccessful()
+            return result
+        } finally {
+            db.endTransaction()
+        }
+    }
+
     fun addBill(b: DBBill): Long {
         val db = writableDatabase
         val values = ContentValues()
@@ -627,11 +647,25 @@ class CowspentSQLiteOpenHelper private constructor(val context: Context) :
         val cursor = db.query(table_bills, columnsBills, selection, selectionArgs, null, null, orderBy)
         val bills: MutableList<DBBill> = ArrayList()
         while (cursor.moveToNext()) {
-            val bill = getBillFromCursor(cursor)
+            bills.add(getBillFromCursor(cursor))
-            bill.billOwers = getBillowersOfBill(bill.id)
-            bills.add(bill)
         }
         cursor.close()
+        if (bills.isEmpty()) return bills
+
+        // Every ower of the matched bills in one query, keyed back to its bill.
+        //
+        // Fetching them per bill meant a project with thousands of bills issued thousands of
+        // queries on every list refresh - and that refresh runs on resume, on switching project,
+        // and after each sync. The bill ids are re-selected as a subquery rather than bound as
+        // arguments, which would blow past SQLite's limit on bound variables for a large project.
+        val owersByBill = getBillOwersCustom(
+            "$key_billId IN (SELECT $key_id FROM $table_bills WHERE $selection)",
+            selectionArgs,
+            null
+        ).groupBy { it.billId }
+        for (bill in bills) {
+            bill.billOwers = owersByBill[bill.id].orEmpty()
+        }
         return bills
     }
 

app/src/main/java/net/helcel/cowspent/persistence/CowspentServerSyncHelper.kt

@@ -50,7 +50,6 @@ class CowspentServerSyncHelper private constructor(private val dbHelper: Cowspen
     private var syncActive = false
     private var syncAccountProjectsActive = false
 
-    private var callbacksPush: MutableList<ICallback> = ArrayList()
     private var callbacksPull: MutableList<ICallback> = ArrayList()
 
     init {
@@ -101,8 +100,6 @@ class CowspentServerSyncHelper private constructor(private val dbHelper: Cowspen
             if (project != null) {
                 Log.d(TAG, "... starting now")
                 val syncTask = SyncTask(onlyLocalChanges, project, forceFullSync)
-                syncTask.addCallbacks(callbacksPush)
-                callbacksPush = ArrayList()
                 if (!onlyLocalChanges) {
                     syncTask.addCallbacks(callbacksPull)
                     callbacksPull = ArrayList()
@@ -114,14 +111,8 @@ class CowspentServerSyncHelper private constructor(private val dbHelper: Cowspen
         } else if (!onlyLocalChanges) {
             Log.d(TAG, "... scheduled")
             projectIdsToSync.add(projId)
-            for (callback in callbacksPush) {
-                callback.onScheduled()
-            }
         } else {
             Log.d(TAG, "... do nothing")
-            for (callback in callbacksPush) {
-                callback.onScheduled()
-            }
         }
         return null
     }
@@ -153,7 +144,12 @@ class CowspentServerSyncHelper private constructor(private val dbHelper: Cowspen
          * walk it is empty, and nothing may be deleted locally on the strength of it.
          */
         val allIds: List<Long>,
-        val syncTimestamp: Long?
+        val syncTimestamp: Long?,
+        /**
+         * A bill referenced a member, category or payment mode this device does not know. A
+         * partial sync skips re-reading the project, so this is what tells it to go back for it.
+         */
+        val hasUnresolvedReferences: Boolean = false
     )
 
     inner class SyncTask(private val onlyLocalChanges: Boolean, private val project: DBProject, private val forceFullSync: Boolean = false) {
@@ -197,12 +193,19 @@ class CowspentServerSyncHelper private constructor(private val dbHelper: Cowspen
             if (project.type == ProjectType.COSPEND) {
                 nextcloudClient = createNextcloudClient()
                 if (nextcloudClient != null) {
+                    // The server's version only moves when the server itself is upgraded, and
+                    // asking costs a whole round trip before any project data moves. Remember it
+                    // per server, and re-read it whenever a full sync is asked for.
+                    version = if (forceFullSync) null else cachedCospendVersion()
+                    if (version == null) {
                         try {
                             val response = nextcloudClient!!.getCapabilities(project)
                             version = response.cospendVersion
+                            rememberCospendVersion(version)
                         } catch (e: Exception) {
                             Log.i(TAG, "Failed to get cospend version when syncing: $e")
                         }
+                    }
                 } else if (preferences.getBoolean(AccountActivity.SETTINGS_USE_SSO, false)) {
                     return LoginStatus.SSO_TOKEN_MISMATCH
                 }
@@ -227,15 +230,32 @@ class CowspentServerSyncHelper private constructor(private val dbHelper: Cowspen
             deferred?.await() ?: LoginStatus.CONNECTION_FAILED
         }
 
+        /** Keyed by server rather than by project, since several projects can share one. */
+        private fun versionKey() = "cospend_version_" + (project.serverUrl ?: "")
+
+        private fun cachedCospendVersion(): String? =
+            preferences.getString(versionKey(), null)
+
+        private fun rememberCospendVersion(version: String?) {
+            // A failed lookup is not an answer, and caching it would pin the wrong API dialect
+            // until the next forced sync.
+            if (version.isNullOrEmpty()) return
+            preferences.edit { putString(versionKey(), version) }
+        }
+
         private fun pushLocalChanges(): LoginStatus {
             Log.d(TAG, "PUSH LOCAL CHANGES")
 
             return try {
+                // The remote member list is only needed to match members waiting to be created,
+                // and pullRemoteChanges fetches them again as part of the project anyway, so it
+                // is not worth a round trip of its own when there is nothing to add.
+                val membersToAdd = dbHelper.getMembersOfProjectWithState(project.id, DBBill.STATE_ADDED)
+                if (membersToAdd.isNotEmpty()) {
                     val membersResponse = client!!.getMembers(project)
                     val remoteMembers = membersResponse.getMembers(project.id)
                     val remoteMembersNames = remoteMembers.map { it.name }
 
-                val membersToAdd = dbHelper.getMembersOfProjectWithState(project.id, DBBill.STATE_ADDED)
                     for (mToAdd in membersToAdd) {
                         val searchIndex = remoteMembersNames.indexOf(mToAdd.name)
                         if (searchIndex != -1) {
@@ -259,6 +279,7 @@ class CowspentServerSyncHelper private constructor(private val dbHelper: Cowspen
                             }
                         }
                     }
+                }
 
                 val membersToEdit = dbHelper.getMembersOfProjectWithState(project.id, DBBill.STATE_EDITED)
                 for (mToEdit in membersToEdit) {
@@ -549,32 +570,53 @@ class CowspentServerSyncHelper private constructor(private val dbHelper: Cowspen
         }
 
         /**
-         * Brings the local copy of the project in line with the server: its own row, then each of
+         * Reads the project's own row and each of its collections. One request, and everything it
-         * its collections, then its bills. Each step is applied as it goes, so a failure part way
+         * carries is applied as it goes, so a failure part way through leaves the earlier steps
-         * through leaves the earlier steps written - the next sync picks up where this one stopped.
+         * written. Returns the members it saw, keyed by remote id.
          */
-        private fun pullRemoteChanges(): LoginStatus {
+        private fun pullProject(): Map<Long, DBMember> {
-            Log.d(TAG, "pullRemoteChanges($project)")
-            return try {
             val projResponse = client!!.getProject(project, 0, null)
-
             updateLocalProject(projResponse)
             syncPaymentModes(projResponse)
             syncCategories(projResponse)
             syncCurrencies(projResponse)
-                val remoteMembersByRemoteId = syncMembers(projResponse)
+            return syncMembers(projResponse)
+        }
+
+        /**
+         * Brings the local copy of the project in line with the server: its own row, then each of
+         * its collections, then its bills. Each step is applied as it goes, so a failure part way
+         * through leaves the earlier steps written - the next sync picks up where this one stopped.
+         *
+         * A partial sync is meant to cost one request. A project's members and labels change far
+         * less often than its bills, so it skips reading them and goes straight for the bills; it
+         * only goes back for the project when a bill turns out to name something this device has
+         * never seen. What that trades away is noticing a rename or a deletion that no bill
+         * refers to - those land on the next full sync.
+         */
+        private fun pullRemoteChanges(): LoginStatus {
+            Log.d(TAG, "pullRemoteChanges($project)")
+            return try {
+                val localBills = dbHelper.getBillsOfProject(project.id)
+                val localBillsByRemoteId = localBills.associateBy { it.remoteId }
+                val partial = !forceFullSync && localBillsByRemoteId.isNotEmpty()
+
+                var remoteMembersByRemoteId: Map<Long, DBMember>? = null
+                if (!partial) remoteMembersByRemoteId = pullProject()
 
                 // Bills arrive with the server's ids for their member, category and payment mode,
                 // so the maps have to be built after those collections are in place.
-                val idMaps = buildRemoteIdMaps()
+                var pulled = fetchRemoteBills(buildRemoteIdMaps(), localBillsByRemoteId)
 
-                val localBills = dbHelper.getBillsOfProject(project.id)
+                if (pulled.hasUnresolvedReferences && remoteMembersByRemoteId == null) {
-                val localBillsByRemoteId = localBills.associateBy { it.remoteId }
+                    Log.d(TAG, "Bill referenced an unknown member or label; re-reading the project")
-                val pulled = fetchRemoteBills(idMaps, localBillsByRemoteId)
+                    remoteMembersByRemoteId = pullProject()
+                    pulled = fetchRemoteBills(buildRemoteIdMaps(), localBillsByRemoteId)
+                }
 
                 applyRemoteBills(pulled.bills, localBillsByRemoteId)
                 deleteVanishedBills(pulled, localBills)
-                deleteVanishedMembers(remoteMembersByRemoteId)
+                remoteMembersByRemoteId?.let { deleteVanishedMembers(it) }
 
                 dbHelper.updateProject(
                     projId = project.id,
@@ -808,7 +850,9 @@ class CowspentServerSyncHelper private constructor(private val dbHelper: Cowspen
             if (usePagedWalk) {
                 walkBillPages(idMaps, localBillsByRemoteId)?.let { return it }
             }
-            return fetchAllBills(idMaps)
+            // A project with nothing stored has no cursor worth sending, so it asks for everything.
+            val since = if (forceFullSync || localBillsByRemoteId.isEmpty()) 0L else null
+            return fetchAllBills(idMaps, since)
         }
 
         /**
@@ -832,6 +876,7 @@ class CowspentServerSyncHelper private constructor(private val dbHelper: Cowspen
             var syncTimestamp = project.lastSyncedTimestamp
             var offset = 0
             var previousPageIds: List<Long>? = null
+            var unresolved = false
             // Counted across pages, not restarted at each one: a run that begins near the end of
             // a page still finishes on the next.
             var unchangedRun = 0
@@ -841,6 +886,7 @@ class CowspentServerSyncHelper private constructor(private val dbHelper: Cowspen
                 val page = response.getBillsCospend(
                     project.id, idMaps.members, idMaps.categories, idMaps.paymentModes
                 )
+                if (response.hasUnresolvedReferences) unresolved = true
                 if (page.isEmpty()) break
 
                 if (page.first().timestamp < page.last().timestamp) {
@@ -880,24 +926,31 @@ class CowspentServerSyncHelper private constructor(private val dbHelper: Cowspen
             }
 
             // A walk reports no allIds, so it never causes a local deletion.
-            return RemoteBills(bills, emptyList(), syncTimestamp)
+            return RemoteBills(bills, emptyList(), syncTimestamp, unresolved)
         }
 
-        private fun fetchAllBills(idMaps: RemoteIdMaps): RemoteBills {
+        /**
-            Log.d(TAG, "Starting full sync for project ${project.remoteId}")
+         * One request for the whole collection. [since] 0 asks for everything; the project cursor
-            val response = client!!.getBills(project)
+         * asks only for what changed. Either way the response carries the full id list, which is
+         * what lets vanished bills be removed locally.
+         */
+        private fun fetchAllBills(idMaps: RemoteIdMaps, since: Long?): RemoteBills {
+            Log.d(TAG, "Fetching bills for ${project.remoteId} (since=${since ?: project.lastSyncedTimestamp})")
+            val response = client!!.getBills(project, since = since)
             return if (project.type == ProjectType.IHATEMONEY) {
                 val bills = response.getBillsIHM(
                     project.id, idMaps.members, idMaps.categories, idMaps.paymentModes
                 )
-                RemoteBills(bills, bills.map { it.remoteId }, 0L)
+                RemoteBills(bills, bills.map { it.remoteId }, 0L, response.hasUnresolvedReferences)
             } else {
-                RemoteBills(
+                val bills = response.getBillsCospend(
-                    response.getBillsCospend(
                     project.id, idMaps.members, idMaps.categories, idMaps.paymentModes
-                    ),
+                )
+                RemoteBills(
+                    bills,
                     response.allBillIds,
-                    response.syncTimestamp
+                    response.syncTimestamp,
+                    response.hasUnresolvedReferences
                 )
             }
         }
@@ -905,6 +958,18 @@ class CowspentServerSyncHelper private constructor(private val dbHelper: Cowspen
         private fun applyRemoteBills(
             remoteBills: List<DBBill>,
             localBillsByRemoteId: Map<Long, DBBill>
+        ) {
+            // Committed in chunks: one transaction per chunk turns a per-row commit into one write
+            // for the whole batch, while still leaving finished chunks on disk if the sync is cut
+            // short - a project part-way through is far better than one that rolled back.
+            remoteBills.chunked(BILL_APPLY_CHUNK).forEach { chunk ->
+                dbHelper.inTransaction { applyBillChunk(chunk, localBillsByRemoteId) }
+            }
+        }
+
+        private fun applyBillChunk(
+            remoteBills: List<DBBill>,
+            localBillsByRemoteId: Map<Long, DBBill>
         ) {
             for (remoteBill in remoteBills) {
                 val localBill = localBillsByRemoteId[remoteBill.remoteId]
@@ -966,6 +1031,10 @@ class CowspentServerSyncHelper private constructor(private val dbHelper: Cowspen
                 }
 
             for (localBill in localBills) {
+                // A bill still waiting to be pushed has no remote id yet, so it is absent from the
+                // server list for the ordinary reason that the server has never seen it. Deleting
+                // it here would throw away a bill the user added while the sync was running.
+                if (localBill.state != DBBill.STATE_OK) continue
                 if (localBill.remoteId !in stillRemote) {
                     dbHelper.deleteBill(localBill.id)
                     nbPulledDeletedBills++
@@ -1801,6 +1870,9 @@ class CowspentServerSyncHelper private constructor(private val dbHelper: Cowspen
          */
         private const val UNCHANGED_RUN_TO_SETTLE = 25
 
+        /** Bills written per transaction while applying a pull. */
+        private const val BILL_APPLY_CHUNK = 500
+
         private var instance: CowspentServerSyncHelper? = null
         private val projectIdsToSync: MutableList<Long> = ArrayList()
 

app/src/main/java/net/helcel/cowspent/util/ExportUtil.kt

@@ -5,6 +5,9 @@ import net.helcel.cowspent.persistence.CowspentSQLiteOpenHelper
 
 object ExportUtil {
 
+    /** Quotes a field the way RFC4180 (and opencsv, and Cospend) expect. */
+    private fun q(value: String?): String = "\"" + (value ?: "").replace("\"", "\"\"") + "\""
+
     @JvmStatic
     fun createExportContent(db: CowspentSQLiteOpenHelper, projectId: Long): String {
         var fileContent = ""
@@ -18,8 +21,8 @@ object ExportUtil {
         }
         val bills = db.getBillsOfProject(projectId).toMutableList()
 
-        // write header
+        // write header.
-        fileContent += "what,amount,date,timestamp,payer_name,payer_weight,payer_active,owers,repeat,categoryid,paymentmode\n"
+        fileContent += "what,amount,date,timestamp,payer_name,payer_weight,payer_active,owers,repeat,categoryid,paymentmode,paymentmodeid,comment\n"
 
         // write members
         for (m in members) {
@@ -41,15 +44,11 @@ object ExportUtil {
             val payerName = payer.name
             val payerWeight = payer.weight
             val payerActive = if (payer.isActivated) 1 else 0
-            val billOwers = b.billOwers
+            val owersTxt = b.billOwers.mapNotNull { membersById[it.memberId]?.name }.joinToString(",")
-            var owersTxt = ""
+            fileContent += "${q(b.what)},${b.amount},${b.date},${b.timestamp},${q(payerName)}," +
-            for (bo in billOwers) {
+                    "$payerWeight,$payerActive,${q(owersTxt)},${b.repeat ?: DBBill.NON_REPEATED}," +
-                owersTxt += membersById[bo.memberId]?.name + ","
+                    "${b.categoryId},${b.paymentMode ?: DBBill.PAYMODE_NONE},${b.paymentModeId}," +
-            }
+                    "${q(b.comment)}\n"
-            owersTxt = owersTxt.replace(",$".toRegex(), "")
-            fileContent += "\"${b.what}\",${b.amount},${b.date},${b.timestamp},\"$payerName\"," +
-                    "$payerWeight,$payerActive,\"$owersTxt\",${b.repeat},${b.categoryId}," +
-                    "${b.paymentMode}\n"
         }
 
         // write categories
@@ -57,7 +56,16 @@ object ExportUtil {
         if (cats.isNotEmpty()) {
             fileContent += "\ncategoryname,categoryid,icon,color\n"
             for (cat in cats) {
-                fileContent += "\"${cat.name}\",${cat.id},\"${cat.icon}\",\"${cat.color}\"\n"
+                fileContent += "${q(cat.name)},${cat.id},${q(cat.icon)},${q(cat.color)}\n"
+            }
+        }
+
+        // write payment modes
+        val pms = db.getPaymentModes(projectId)
+        if (pms.isNotEmpty()) {
+            fileContent += "\npaymentmodename,paymentmodeid,icon,color\n"
+            for (pm in pms) {
+                fileContent += "${q(pm.name)},${pm.id},${q(pm.icon)},${q(pm.color)}\n"
             }
         }
 
@@ -67,9 +75,9 @@ object ExportUtil {
             project.currencyName!!.isNotEmpty() && project.currencyName != "null"
         ) {
             fileContent += "\ncurrencyname,exchange_rate\n"
-            fileContent += "\"${project.currencyName}\",1\n"
+            fileContent += "${q(project.currencyName)},1\n"
             for (cur in curs) {
-                fileContent += "\"${cur.name}\",${cur.exchangeRate}\n"
+                fileContent += "${q(cur.name)},${cur.exchangeRate}\n"
             }
         }
 

app/src/main/java/net/helcel/cowspent/util/ServerResponse.kt

@@ -28,6 +28,33 @@ open class ServerResponse(
 ) {
     private val sdf = SimpleDateFormat("yyyy-MM-dd", Locale.ROOT)
 
+    /**
+     * Set while parsing bills when one referenced a member, category or payment mode that none of
+     * the supplied maps knew about. A partial sync does not re-read the project, so this is how it
+     * learns that its copy of those collections has gone stale and has to be refreshed.
+     */
+    var hasUnresolvedReferences = false
+        private set
+
+    /** Members are only ever addressed by the server's own id, so an unknown one is stale state. */
+    private fun resolveMember(map: Map<Long, Long>, remoteId: Long): Long {
+        map[remoteId]?.let { return it }
+        if (remoteId != 0L) hasUnresolvedReferences = true
+        return 0L
+    }
+
+    /**
+     * Built-in labels are negative constants with no row of their own on a remote project, so they
+     * never appear in these maps and are carried through as-is. An unknown *positive* id is a real
+     * gap - it is dropped rather than kept, as it would collide with a local id.
+     */
+    private fun resolveLabel(map: Map<Long, Long>, remoteId: Long): Long {
+        map[remoteId]?.let { return it }
+        if (remoteId < 0) return remoteId
+        if (remoteId > 0) hasUnresolvedReferences = true
+        return 0L
+    }
+
     class NotModifiedException : IOException()
 
     protected val content: String
@@ -744,10 +771,10 @@ open class ServerResponse(
         }
         if (!json.isNull("payer_id")) {
             payerRemoteId = json.getLong("payer_id")
-            payerId = memberRemoteIdToId[payerRemoteId] ?: 0
+            payerId = resolveMember(memberRemoteIdToId, payerRemoteId)
         } else if (!json.isNull("payer")) {
             payerRemoteId = json.getLong("payer")
-            payerId = memberRemoteIdToId[payerRemoteId] ?: 0
+            payerId = resolveMember(memberRemoteIdToId, payerRemoteId)
         }
         if (!json.isNull("amount")) {
             amount = json.getDouble("amount")
@@ -794,8 +821,8 @@ open class ServerResponse(
             paymentModeRemoteId = DBBill.oldPmIdToNew[paymentMode] ?: DBBill.PAYMODE_ID_NONE
         }
 
-        val categoryId = catRemoteIdToId[categoryRemoteId] ?: 0L
+        val categoryId = resolveLabel(catRemoteIdToId, categoryRemoteId)
-        val paymentModeId = pmRemoteIdToId[paymentModeRemoteId] ?: 0L
+        val paymentModeId = resolveLabel(pmRemoteIdToId, paymentModeRemoteId)
 
         val bill = DBBill(
             0, remoteId, projId, payerId, amount, timestamp, what,
@@ -822,7 +849,7 @@ open class ServerResponse(
                 } else {
                     jsonOs.getLong(i)
                 }
-                val memberLocalId = memberRemoteIdToId[memberRemoteId] ?: 0
+                val memberLocalId = resolveMember(memberRemoteIdToId, memberRemoteId)
                 billOwers.add(DBBillOwer(0, 0, memberLocalId))
             }
         }

app/src/main/java/net/helcel/cowspent/util/SyncSettings.kt

@@ -5,29 +5,45 @@ import androidx.preference.PreferenceManager
 import net.helcel.cowspent.R
 
 /**
- * The SyncOnOpen preference: how often opening the app refreshes the account and every project.
+ * The two independent delays that govern syncing.
  *
- * The choices and the default live here rather than in the settings screen so that the screen and
+ * They used to be one setting, which meant the app-open throttle and the full-sync delay could
- * the sync trigger cannot disagree about what is in effect.
+ * not be tuned apart even though they answer different questions. The choices and defaults live
+ * here rather than in the settings screen so the screen and the sync triggers cannot disagree
+ * about what is in effect.
  */
 object SyncSettings {
 
-    /** Steps offered by the slider, in minutes. */
+    /**
-    val INTERVAL_CHOICES_MINUTES = listOf(1, 10, 60, 1440)
+     * How long opening the app waits before refreshing the account and every project again, so
-
+     * that resuming within the interval does not repeat the work. Not user-facing: it governs
-    const val DEFAULT_INTERVAL_MINUTES = 10
+     * background catch-up, not anything the user asked for.
+     */
+    const val OPEN_SYNC_INTERVAL_MINUTES = 10
 
     /**
-     * The configured interval in minutes. A stored value that is not one of the offered steps —
+     * Steps offered for the full sync delay, in minutes. 0 means every manual refresh is a full
-     * from a restored backup, or a build that changed the steps — falls back to the default
+     * sync; anything else lets a refresh inside the window settle for fetching just the changes.
-     * rather than being displayed as the first step while a different value drives the sync.
      */
-    fun intervalMinutes(context: Context): Int {
+    val FULL_SYNC_DELAY_CHOICES_MINUTES = listOf(0, 60, 1440, 10080)
+
+    /**
+     * Only consulted once Extra Features is on - with it off every pull-to-refresh is a full
+     * sync, whatever is stored here.
+     */
+    const val DEFAULT_FULL_SYNC_DELAY_MINUTES = 1440
+
+    /**
+     * The configured delay in minutes. A stored value that is not one of the offered steps - from
+     * a restored backup, or a build that changed the steps - falls back to the default rather
+     * than being displayed as one step while a different value drives the sync.
+     */
+    fun fullSyncDelayMinutes(context: Context): Int {
         val prefs = PreferenceManager.getDefaultSharedPreferences(context)
         val stored = prefs.getInt(
-            context.getString(R.string.pref_key_auto_sync_on_open),
+            context.getString(R.string.pref_key_full_sync_delay),
-            DEFAULT_INTERVAL_MINUTES
+            DEFAULT_FULL_SYNC_DELAY_MINUTES
         )
-        return if (stored in INTERVAL_CHOICES_MINUTES) stored else DEFAULT_INTERVAL_MINUTES
+        return if (stored in FULL_SYNC_DELAY_CHOICES_MINUTES) stored else DEFAULT_FULL_SYNC_DELAY_MINUTES
     }
 }

app/src/main/java/net/helcel/cowspent/util/VersatileProjectSyncClient.kt

@@ -689,12 +689,18 @@ class VersatileProjectSyncClient(
     }
 
     @Throws(JSONException::class, IOException::class, TokenMismatchException::class, NextcloudHttpRequestFailedException::class)
+    /**
+     * [since] overrides the project cursor sent as lastChanged. Passing 0 asks the server for the
+     * whole project rather than the changes since the last sync; omitting it keeps the cursor, so
+     * the server returns only what has moved.
+     */
     fun getBills(
         project: DBProject,
         offset: Int? = null,
         limit: Int? = null,
         reverse: Boolean? = null,
-        deleted: Int? = null
+        deleted: Int? = null,
+        since: Long? = null
     ): ServerResponse.BillsResponse {
         var target: String
         var username: String?
@@ -706,7 +712,7 @@ class VersatileProjectSyncClient(
         val paramValues: MutableList<String> = ArrayList()
 
         if (ProjectType.COSPEND == project.type) {
-            val tsLastSync = project.lastSyncedTimestamp
+            val tsLastSync = since ?: project.lastSyncedTimestamp
             if (offset == null) {
                 if (cospendVersionGT161) {
                     paramKeys.add("lastChanged")

app/src/main/res/values-af-rZA/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-ar-rSA/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-ca-rES/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-cs-rCZ/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-da-rDK/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

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

@@ -138,14 +138,8 @@
     <string name="settings_color_custom">Eigene Farbe</string>
     <string name="settings_color_mode">Farbauswahl</string>
     <string name="settings_show_archived">Archivierte Projekte anzeigen</string>
-    <string name="settings_beta_features">Beta-Funktionen</string>
-    <string name="settings_beta_features_summary">Experimentelle Funktionen aktivieren. Benutzung auf eigene Gefahr.</string>
     <string name="settings_fill_new_bill_from_last">Aus letzter Rechnung vorausfüllen</string>
     <string name="settings_fill_new_bill_from_last_summary">Zahler, Kategorie, Zahlungsart und Beteiligte aus der zuletzt erstellten Rechnung des Projekts übernehmen.</string>
-    <string name="settings_auto_sync_on_open">Synchronisierungsintervall</string>
-    <string name="settings_auto_sync_on_open_summary">Wie oft Konto und alle Projekte beim Öffnen der App aktualisiert werden.</string>
-    <string name="pref_value_sync_1m">1 Minute</string>
-    <string name="pref_value_sync_10m">10 Minuten</string>
     <string name="pref_value_sync_1h">1 Stunde</string>
     <string name="pref_value_sync_1d">1 Tag</string>
     <string name="settings_url_warn_http">WARNUNG: \"http\" ist unsicher. Verwende \"https\".</string>

app/src/main/res/values-el-rGR/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-es-rES/strings.xml

@@ -137,14 +137,8 @@
     <string name="settings_color_custom">Color personalizado</string>
     <string name="settings_color_mode">Selección de color</string>
     <string name="settings_show_archived">Mostrar los proyectos archivados</string>
-    <string name="settings_beta_features">Funciones beta</string>
-    <string name="settings_beta_features_summary">Activar las funciones experimentales. Úsalas bajo tu propia responsabilidad.</string>
     <string name="settings_fill_new_bill_from_last">Rellenar desde la última factura</string>
     <string name="settings_fill_new_bill_from_last_summary">Reutilizar el pagador, la categoría, el modo y los participantes de la última factura creada en el proyecto.</string>
-    <string name="settings_auto_sync_on_open">Intervalo de sincronización</string>
-    <string name="settings_auto_sync_on_open_summary">Con qué frecuencia se actualizan la cuenta y todos los proyectos al abrir la aplicación.</string>
-    <string name="pref_value_sync_1m">1 minuto</string>
-    <string name="pref_value_sync_10m">10 minutos</string>
     <string name="pref_value_sync_1h">1 hora</string>
     <string name="pref_value_sync_1d">1 día</string>
     <string name="settings_url_warn_http">ADVERTENCIA: \"http\" no es seguro. Usa \"https\".</string>

app/src/main/res/values-fi-rFI/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-fr-rFR/strings.xml

@@ -138,14 +138,8 @@
     <string name="settings_color_custom">Couleur personnalisée</string>
     <string name="settings_color_mode">Sélection de la couleur</string>
     <string name="settings_show_archived">Afficher les projets archivés</string>
-    <string name="settings_beta_features">Fonctionnalités bêta</string>
-    <string name="settings_beta_features_summary">Activer les fonctionnalités expérimentales. À utiliser à vos risques et périls.</string>
     <string name="settings_fill_new_bill_from_last">Pré-remplir depuis la dernière facture</string>
     <string name="settings_fill_new_bill_from_last_summary">Reprendre le payeur, la catégorie, le mode et les participants de la dernière facture créée dans le projet.</string>
-    <string name="settings_auto_sync_on_open">Intervalle de synchronisation</string>
-    <string name="settings_auto_sync_on_open_summary">Fréquence de rafraîchissement du compte et de tous les projets à l\'ouverture de l\'application.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 heure</string>
     <string name="pref_value_sync_1d">1 jour</string>
     <string name="settings_url_warn_http">AVERTISSEMENT : \"http\" n\'est pas sûr. Utilisez \"https\".</string>

app/src/main/res/values-hu-rHU/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-it-rIT/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-iw-rIL/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-ja-rJP/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-ko-rKR/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-nl-rNL/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-no-rNO/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-pl-rPL/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-pt-rBR/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-pt-rPT/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-ro-rRO/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-ru-rRU/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-sr-rSP/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-sv-rSE/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-tr-rTR/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-uk-rUA/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-vi-rVN/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-zh-rCN/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

app/src/main/res/values-zh-rTW/strings.xml

@@ -144,14 +144,8 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>

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

@@ -139,17 +139,17 @@
     <string name="settings_color_custom">Custom color</string>
     <string name="settings_color_mode">Color Selection</string>
     <string name="settings_show_archived">Show archived projects</string>
-    <string name="settings_beta_features">Beta Features</string>
+    <string name="settings_extra_features">Extra Features</string>
-    <string name="settings_beta_features_summary">Enable experimental features. Use at your own risk.</string>
+    <string name="settings_extra_features_summary">Experimental and advanced settings. Use at your own risk.</string>
     <string name="settings_fill_new_bill_from_last">Auto-fill from last bill</string>
     <string name="settings_fill_new_bill_from_last_summary">Pre-fill payer, category, mode and owers from the last bill created in the project.</string>
     <string name="settings_stats_include_deactivated">Include deactivated members in stats</string>
-    <string name="settings_auto_sync_on_open">Sync interval</string>
+    <string name="settings_full_sync_delay">Full sync delay</string>
-    <string name="settings_auto_sync_on_open_summary">How often to refresh the account and all projects when opening the app.</string>
+    <string name="settings_full_sync_delay_summary">How long a pull-to-refresh waits between two full syncs. In between, it only fetches what changed, which is much faster.</string>
-    <string name="pref_value_sync_1m">1 minute</string>
+    <string name="pref_value_sync_always">Always</string>
-    <string name="pref_value_sync_10m">10 minutes</string>
     <string name="pref_value_sync_1h">1 hour</string>
     <string name="pref_value_sync_1d">1 day</string>
+    <string name="pref_value_sync_1w">1 week</string>
     <string name="settings_url_warn_http">WARNING: "http" is unsafe. Use "https".</string>
     <string name="settings_colorpicker_title">Choose Color</string>
 
@@ -170,9 +170,9 @@
     <string name="pref_key_color_mode" translatable="false">colorMode</string>
     <string name="pref_key_offline_mode" translatable="false">offlineMode</string>
     <string name="pref_key_show_archived" translatable="false">showArchived</string>
-    <string name="pref_key_beta_features" translatable="false">betaFeatures</string>
+    <string name="pref_key_extra_features" translatable="false">betaFeatures</string>
     <string name="pref_key_stats_include_deactivated" translatable="false">statsIncludeDeactivated</string>
-    <string name="pref_key_auto_sync_on_open" translatable="false">autoSyncOnOpen</string>
+    <string name="pref_key_full_sync_delay" translatable="false">fullSyncDelayMinutes</string>
     <string name="pref_key_last_account_sync_timestamp" translatable="false">lastAccountSyncTimestamp</string>
     <string name="pref_key_fill_new_bill_from_last" translatable="false">fillNewBillFromLast</string>
     <string name="pref_value_night_mode_no" translatable="false">1</string>