Fixes the use of decimals on Notification's chart

app/src/main/java/com/vitorpamplona/amethyst/ui/note/UserReactionsRow.kt

@@ -193,6 +193,8 @@ class UserReactionsViewModel(val account: Account) : ViewModel() {
     val todaysReactionCount = _reactions.map { showCount(it[today()]) }.distinctUntilChanged()
     val todaysZapAmount = _zaps.map { showAmountAxis(it[today()]) }.distinctUntilChanged()
 
+    var shouldShowDecimalsInAxis = false
+
     fun formatDate(createAt: Long): String {
         return sdf.format(
             Instant.ofEpochSecond(createAt)
@@ -334,10 +336,28 @@ class UserReactionsViewModel(val account: Account) : ViewModel() {
         val chartEntryModelProducer1 = ChartEntryModelProducer(listOfCountCurves).getModel()
         val chartEntryModelProducer2 = ChartEntryModelProducer(listOfValueCurves).getModel()
 
+        this.shouldShowDecimalsInAxis = shouldShowDecimals(chartEntryModelProducer2.minY, chartEntryModelProducer2.maxY)
+
         this._axisLabels.emit(listOf(6, 5, 4, 3, 2, 1, 0).map { displayAxisFormatter.format(now.minusSeconds(day * it)) })
         this._chartModel.emit(chartEntryModelProducer1.plus(chartEntryModelProducer2))
     }
 
+    // determine if the min max are so close that they render to the same number.
+    fun shouldShowDecimals(min: Float, max: Float): Boolean {
+        val step = (max - min) / 8
+
+        var previous = showAmountAxis(min.toBigDecimal())
+        for (i in 1..7) {
+            val current = showAmountAxis((min + (i * step)).toBigDecimal())
+            if (previous == current) {
+                return true
+            }
+            previous = current
+        }
+
+        return false
+    }
+
     var collectorJob: Job? = null
 
     init {

app/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/NotificationScreen.kt

@@ -55,6 +55,7 @@ import com.vitorpamplona.amethyst.ui.note.OneKilo
 import com.vitorpamplona.amethyst.ui.note.OneMega
 import com.vitorpamplona.amethyst.ui.note.UserReactionsRow
 import com.vitorpamplona.amethyst.ui.note.UserReactionsViewModel
+import com.vitorpamplona.amethyst.ui.note.showAmount
 import com.vitorpamplona.amethyst.ui.note.showCount
 import com.vitorpamplona.amethyst.ui.screen.NotificationViewModel
 import com.vitorpamplona.amethyst.ui.screen.RefresheableCardView
@@ -224,6 +225,7 @@ private fun ObserveAndShowChart(
 ) {
     val axisModel = model.axisLabels.collectAsStateWithLifecycle()
     val chartModel by model.chartModel.collectAsStateWithLifecycle()
+
     chartModel?.let {
         Chart(
             chart = remember(lineChartCount, lineChartZaps) {
@@ -235,7 +237,7 @@ private fun ObserveAndShowChart(
             ),
             endAxis = rememberEndAxis(
                 label = axisLabelComponent(color = BitcoinOrange),
-                valueFormatter = AmountAxisValueFormatter()
+                valueFormatter = AmountAxisValueFormatter(model.shouldShowDecimalsInAxis)
             ),
             bottomAxis = rememberBottomAxis(
                 valueFormatter = LabelValueFormatter(axisModel)
@@ -265,12 +267,16 @@ class CountAxisValueFormatter() : AxisValueFormatter<AxisPosition.Vertical.Start
 }
 
 @Stable
-class AmountAxisValueFormatter() : AxisValueFormatter<AxisPosition.Vertical.End> {
+class AmountAxisValueFormatter(val showDecimals: Boolean) : AxisValueFormatter<AxisPosition.Vertical.End> {
     override fun formatValue(
         value: Float,
         chartValues: ChartValues
     ): String {
-        return showAmountAxis(value.toBigDecimal())
+        return if (showDecimals) {
+            showAmount(value.toBigDecimal())
+        } else {
+            showAmountAxis(value.toBigDecimal())
+        }
     }
 }