Percent Split

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

@@ -324,16 +324,28 @@ class EditBillActivity : AppCompatActivity() {
 
     private suspend fun saveBill(): Long = withContext(Dispatchers.IO) {
         val groupedBillIds = intent.getLongArrayExtra(PARAM_GROUPED_BILL_IDS)
-        val isCustomSplit = viewModel.isCustomSplit
+        val splitMode = viewModel.splitMode
 
-        if (isCustomSplit) {
+        if (splitMode != SplitMode.EVEN) {
-            val splits: Map<Long, Double> = viewModel.owersCustomSplit.filter { (id, amountStr) ->
+            val splits: Map<Long, Double> = if (splitMode == SplitMode.CUSTOM) {
+                viewModel.owersCustomSplit.filter { (id, amountStr) ->
                     viewModel.owersSelection[id] == true && (amountStr.replace(',', '.').toDoubleOrNull()
                         ?: 0.0) > 0
                 }.mapValues {
                     val uiAmount = it.value.replace(',', '.').toDoubleOrNull() ?: 0.0
                     SupportUtil.round2(uiAmount / viewModel.selectedCurrencyRate)
                 }
+            } else { // PERCENT
+                val totalAmount = viewModel.amountAsDouble
+                viewModel.owersPercentSplit.filter { (id, percentStr) ->
+                    viewModel.owersSelection[id] == true && (percentStr.replace(',', '.').toDoubleOrNull()
+                        ?: 0.0) > 0
+                }.mapValues {
+                    val percent = it.value.replace(',', '.').toDoubleOrNull() ?: 0.0
+                    val uiAmount = totalAmount * percent / 100.0
+                    SupportUtil.round2(uiAmount / viewModel.selectedCurrencyRate)
+                }
+            }
 
             if (splits.isEmpty()) return@withContext 0L
             

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

@@ -1,6 +1,7 @@
 package net.helcel.cowspent.android.bill_edit
 
 import android.annotation.SuppressLint
+import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.interaction.MutableInteractionSource
 import androidx.compose.foundation.layout.*
@@ -16,6 +17,7 @@ import androidx.compose.material.icons.filled.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
 import androidx.compose.ui.draw.scale
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.SolidColor
@@ -357,35 +359,55 @@ fun OwerSelectionSection(
         )
         Spacer(Modifier.weight(1f))
 
-        if (viewModel.isCustomSplit) {
+        if (viewModel.splitMode != SplitMode.EVEN) {
             val diff = viewModel.getDiffSplit()
             if (abs(diff) > 0.01) {
+                val unit = if (viewModel.splitMode == SplitMode.PERCENT) "%" else ""
                 val diffText =
-                    if (diff > 0) "Missing: ${SupportUtil.normalNumberFormat.format(diff)}" else "Excess: ${
+                    if (diff > 0) "Missing: ${SupportUtil.normalNumberFormat.format(diff)}$unit" else "Excess: ${
                         SupportUtil.normalNumberFormat.format(-diff)
-                    }"
+                    }$unit"
                 Text(
                     diffText,
                     color = MaterialTheme.colors.error,
                     fontSize = 12.sp,
-                    modifier = Modifier.padding(horizontal = 16.dp)
+                    modifier = Modifier.padding(horizontal = 4.dp)
                 )
             }
-        } else {
-            Text("Even Split", fontSize = 12.sp)
         }
-        Switch(
+
-            checked = !viewModel.isCustomSplit,
+        val splitOptions = listOf(SplitMode.EVEN, SplitMode.CUSTOM, SplitMode.PERCENT)
-            enabled = canEdit,
+        Row(
-            onCheckedChange = {
+            modifier = Modifier
-                viewModel.isCustomSplit = !it
+                .padding(start = 8.dp)
+                .background(MaterialTheme.colors.onSurface.copy(alpha = 0.05f), MaterialTheme.shapes.small)
+        ) {
+            splitOptions.forEach { mode ->
+                val isSelected = viewModel.splitMode == mode
+                Box(
+                    modifier = Modifier
+                        .clip(MaterialTheme.shapes.small)
+                        .background(if (isSelected) MaterialTheme.colors.primary else Color.Transparent)
+                        .clickable(enabled = canEdit) {
+                            viewModel.splitMode = mode
                             viewModel.updateSplits()
+                        }
+                        .padding(horizontal = 8.dp, vertical = 4.dp)
+                ) {
+                    Text(
+                        text = when (mode) {
+                            SplitMode.EVEN -> "="
+                            SplitMode.CUSTOM -> "#"
+                            SplitMode.PERCENT -> "%"
                         },
-            colors = SwitchDefaults.colors(
+                        color = if (isSelected) MaterialTheme.colors.onPrimary else MaterialTheme.colors.onSurface,
-                uncheckedThumbColor = MaterialTheme.colors.onSurface,
+                        fontSize = 14.sp,
-            )
+                        fontWeight = FontWeight.Bold
                     )
                 }
+            }
+        }
+    }
 
     viewModel.members.forEach { member ->
         val isSelected = viewModel.owersSelection[member.id] ?: false
@@ -410,12 +432,22 @@ fun OwerSelectionSection(
             Spacer(modifier = Modifier.width(8.dp))
             Text(member.name, modifier = Modifier.weight(1f))
 
-            if (isSelected || viewModel.isCustomSplit) {
+            if (isSelected || viewModel.splitMode != SplitMode.EVEN) {
                 val interactionSource = remember { MutableInteractionSource() }
+                val value = if (viewModel.splitMode == SplitMode.PERCENT) {
+                    viewModel.owersPercentSplit[member.id] ?: ""
+                } else {
+                    viewModel.owersCustomSplit[member.id] ?: ""
+                }
+                
                 BasicTextField(
-                    value = viewModel.owersCustomSplit[member.id] ?: "",
+                    value = value,
                     onValueChange = {
+                        if (viewModel.splitMode == SplitMode.PERCENT) {
+                            viewModel.owersPercentSplit[member.id] = it
+                        } else {
                             viewModel.owersCustomSplit[member.id] = it
+                        }
                         viewModel.owersSelection[member.id] = (it != "")
                     },
                     modifier = Modifier
@@ -423,7 +455,7 @@ fun OwerSelectionSection(
                         .height(46.dp),
                     interactionSource = interactionSource,
                     singleLine = true,
-                    enabled = viewModel.isCustomSplit && canEdit,
+                    enabled = viewModel.splitMode != SplitMode.EVEN && canEdit,
                     keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
                     cursorBrush = SolidColor(MaterialTheme.colors.onSurface),
                     textStyle = LocalTextStyle.current.copy(
@@ -432,13 +464,13 @@ fun OwerSelectionSection(
                     ),
                 ) { innerTextField ->
                     TextFieldDefaults.OutlinedTextFieldDecorationBox(
-                        value = viewModel.owersCustomSplit[member.id] ?: "",
+                        value = value,
                         visualTransformation = VisualTransformation.None,
                         innerTextField = innerTextField,
                         singleLine = true,
-                        enabled = viewModel.isCustomSplit && canEdit,
+                        enabled = viewModel.splitMode != SplitMode.EVEN && canEdit,
                         interactionSource = interactionSource,
-                        contentPadding = PaddingValues(horizontal = 12.dp, vertical = 0.dp),
+                        contentPadding = PaddingValues(horizontal = 8.dp, vertical = 0.dp),
                         colors = TextFieldDefaults.textFieldColors(
                             cursorColor = MaterialTheme.colors.onSurface,
                             backgroundColor = Color.Transparent,

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

@@ -16,6 +16,10 @@ import net.helcel.cowspent.model.DBMember
 import net.helcel.cowspent.util.SupportUtil
 import net.helcel.cowspent.util.evalMath
 
+enum class SplitMode {
+    EVEN, CUSTOM, PERCENT
+}
+
 class EditBillViewModel : ViewModel() {
     var what by mutableStateOf("")
     var amount by mutableStateOf("")
@@ -34,8 +38,9 @@ class EditBillViewModel : ViewModel() {
     var members by mutableStateOf<List<DBMember>>(emptyList())
 
     var owersSelection = mutableStateMapOf<Long, Boolean>()
-    var isCustomSplit by mutableStateOf(false)
+    var splitMode by mutableStateOf(SplitMode.EVEN)
     var owersCustomSplit = mutableStateMapOf<Long, String>()
+    var owersPercentSplit = mutableStateMapOf<Long, String>()
 
     var dialogState by mutableStateOf<DialogState?>(null)
 
@@ -54,7 +59,7 @@ class EditBillViewModel : ViewModel() {
     }
 
     fun updateSplits() {
-        if (!isCustomSplit) {
+        if (splitMode == SplitMode.EVEN) {
             val even = getEvenSplit()
             val evenStr = if (even == 0.0) "" else SupportUtil.round2(even).toString()
             members.forEach { m ->
@@ -64,18 +69,36 @@ class EditBillViewModel : ViewModel() {
                     owersCustomSplit.remove(m.id)
                 }
             }
+        } else if (splitMode == SplitMode.PERCENT) {
+            val selectedCount = owersSelection.count { it.value }
+            if (selectedCount > 0) {
+                val evenPercent = 100.0 / selectedCount
+                val evenPercentStr = SupportUtil.round2(evenPercent).toString()
+                members.forEach { m ->
+                    if (owersSelection[m.id] == true) {
+                        if (owersPercentSplit[m.id].isNullOrEmpty()) {
+                            owersPercentSplit[m.id] = evenPercentStr
+                        }
+                    } else {
+                        owersPercentSplit.remove(m.id)
+                    }
+                }
+            }
         }
     }
 
     fun toggleMember(id: Long, selected: Boolean) {
         owersSelection[id] = selected
-        if (isCustomSplit) {
+        if (splitMode != SplitMode.EVEN) {
             if (selected) {
-                if (owersCustomSplit[id].isNullOrEmpty()) {
+                if (splitMode == SplitMode.CUSTOM && owersCustomSplit[id].isNullOrEmpty()) {
                     owersCustomSplit[id] = "0"
+                } else if (splitMode == SplitMode.PERCENT && owersPercentSplit[id].isNullOrEmpty()) {
+                    owersPercentSplit[id] = "0"
                 }
             } else {
                 owersCustomSplit.remove(id)
+                owersPercentSplit.remove(id)
             }
         } else {
             updateSplits()
@@ -83,10 +106,17 @@ class EditBillViewModel : ViewModel() {
     }
 
     fun getDiffSplit(): Double {
+        return if (splitMode == SplitMode.PERCENT) {
+            val customTotal = owersPercentSplit.entries
+                .filter { owersSelection[it.key] == true }
+                .sumOf { it.value.replace(',', '.').toDoubleOrNull() ?: 0.0 }
+            100.0 - customTotal
+        } else {
             val customTotal = owersCustomSplit.entries
                 .filter { owersSelection[it.key] == true }
                 .sumOf { it.value.replace(',', '.').toDoubleOrNull() ?: 0.0 }
-        return amountAsDouble - customTotal
+            amountAsDouble - customTotal
+        }
     }
 
     fun getOwersIds(): List<Long> {
@@ -204,9 +234,10 @@ class EditBillViewModel : ViewModel() {
 
         owersSelection.clear()
         owersCustomSplit.clear()
+        owersPercentSplit.clear()
 
         if (customSplits != null) {
-            isCustomSplit = true
+            splitMode = SplitMode.CUSTOM
             for (member in members) {
                 val selected = customSplits.containsKey(member.id)
                 owersSelection[member.id] = selected
@@ -222,6 +253,7 @@ class EditBillViewModel : ViewModel() {
             }
         } else {
             // Even split logic
+            splitMode = SplitMode.EVEN
             val billOwerIds = bill.billOwersIds
             val selectedCount = billOwerIds.size