Added basic implementation of a total assets graph.

src/main/java/com/andrewlalis/perfin/control/DashboardController.java

@@ -2,6 +2,7 @@ package com.andrewlalis.perfin.control;
 
 import com.andrewlalis.javafx_scene_router.RouteSelectionListener;
 import com.andrewlalis.perfin.model.Profile;
+import com.andrewlalis.perfin.view.component.module.TotalAssetsGraphModule;
 import com.andrewlalis.perfin.view.component.module.*;
 import javafx.fxml.FXML;
 import javafx.geometry.Bounds;
@@ -30,7 +31,10 @@ public class DashboardController implements RouteSelectionListener {
         var m4 = new VendorSpendChartModule(modulesFlowPane);
         m4.columnsProperty.set(2);
 
-        modulesFlowPane.getChildren().addAll(accountsModule, transactionsModule, m3, m4);
+        var m5 = new TotalAssetsGraphModule(modulesFlowPane);
+        m5.columnsProperty.set(1);
+
+        modulesFlowPane.getChildren().addAll(accountsModule, transactionsModule, m3, m4, m5);
     }
 
     @Override

src/main/java/com/andrewlalis/perfin/data/DataSource.java

@@ -9,6 +9,7 @@ import javafx.application.Platform;
 
 import java.math.BigDecimal;
 import java.nio.file.Path;
+import java.time.Instant;
 import java.util.*;
 import java.util.concurrent.CompletableFuture;
 import java.util.function.Consumer;
@@ -111,15 +112,16 @@ public interface DataSource {
     /**
      * Gets a list of combined total assets for each currency that's tracked,
      * ordered with highest assets first.
+     * @param timestamp The timestamp at which to get the balance.
      * @return A future that resolves to the list of amounts for each currency.
      */
-    default CompletableFuture<List<MoneyValue>> getCombinedAccountBalances() {
+    default CompletableFuture<List<MoneyValue>> getCombinedAccountBalances(Instant timestamp) {
         return mapRepoAsync(AccountRepository.class, repo -> {
             List<Account> accounts = repo.findAll(PageRequest.unpaged()).items();
             Map<Currency, BigDecimal> totals = new HashMap<>();
             for (var account : accounts) {
                 BigDecimal currencyTotal = totals.computeIfAbsent(account.getCurrency(), c -> BigDecimal.ZERO);
-                BigDecimal accountBalance = repo.deriveCurrentBalance(account.id);
+                BigDecimal accountBalance = repo.deriveBalance(account.id, timestamp);
                 if (account.getType() == AccountType.CREDIT_CARD) accountBalance = accountBalance.negate();
                 totals.put(account.getCurrency(), currencyTotal.add(accountBalance));
             }
@@ -131,4 +133,8 @@ public interface DataSource {
             return values;
         });
     }
+
+    default CompletableFuture<List<MoneyValue>> getCombinedAccountBalances() {
+        return getCombinedAccountBalances(Instant.now());
+    }
 }

src/main/java/com/andrewlalis/perfin/view/component/module/PieChartModule.java

@@ -52,6 +52,7 @@ public abstract class PieChartModule extends DashboardModule {
 
         this.timeRangeChoiceBox.getItems().addAll(RANGE_CHOICES);
         this.timeRangeChoiceBox.getSelectionModel().select("All Time");
+        this.currencyChoiceBox.managedProperty().bind(this.currencyChoiceBox.visibleProperty());
 
         PieChart chart = new PieChart(chartData);
         chart.setLegendVisible(false);
@@ -68,9 +69,7 @@ public abstract class PieChartModule extends DashboardModule {
                 chartData.clear();
             }
         });
-        timeRangeChoiceBox.valueProperty().addListener((observable, oldValue, newValue) -> {
-            renderChart();
-        });
+        timeRangeChoiceBox.valueProperty().addListener((observable, oldValue, newValue) -> renderChart());
     }
 
     @Override
@@ -136,6 +135,7 @@ public abstract class PieChartModule extends DashboardModule {
                     } else {
                         currencyChoiceBox.getSelectionModel().selectFirst();
                     }
+                    currencyChoiceBox.setVisible(orderedCurrencies.size() > 1);
                 });
             });
     }

src/main/java/com/andrewlalis/perfin/view/component/module/TotalAssetsGraphModule.java

@@ -0,0 +1,63 @@
+package com.andrewlalis.perfin.view.component.module;
+
+import com.andrewlalis.perfin.model.Profile;
+import javafx.application.Platform;
+import javafx.collections.FXCollections;
+import javafx.collections.ObservableList;
+import javafx.scene.chart.*;
+import javafx.scene.layout.Pane;
+
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.ZoneId;
+import java.time.temporal.ChronoUnit;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * A module for visualizing the total asset value in the user's profile over
+ * a configurable period of time.
+ */
+public class TotalAssetsGraphModule extends DashboardModule {
+    private final ObservableList<XYChart.Data<String, Number>> totalAssetDataPoints = FXCollections.observableArrayList();
+
+    public TotalAssetsGraphModule(Pane parent) {
+        super(parent);
+        Axis<String> xAxis = new CategoryAxis();
+        Axis<Number> yAxis = new NumberAxis();
+
+        LineChart<String, Number> chart = new LineChart<>(xAxis, yAxis, FXCollections.observableArrayList(
+                new XYChart.Series<>("Total Assets", totalAssetDataPoints)
+        ));
+        chart.setLegendVisible(false);
+        this.getChildren().add(new ModuleHeader(
+                "Total Assets over Time"
+        ));
+        this.getChildren().add(chart);
+    }
+
+    @Override
+    public void refreshContents() {
+        totalAssetDataPoints.clear();
+        String[] dateLabels = new String[12];
+        double[] values = new double[12];
+        CompletableFuture<?>[] futures = new CompletableFuture[12];
+        for (int i = 0; i < 12; i++) {
+            final int idx = i;
+            Instant timestamp = Instant.now().minus((12 - i - 1) * 30, ChronoUnit.DAYS);
+            dateLabels[i] = LocalDate.from(timestamp.atZone(ZoneId.systemDefault())).toString();
+            futures[i] = Profile.getCurrent().dataSource().getCombinedAccountBalances(timestamp)
+                    .thenAccept(moneyValues -> {
+                        values[idx] = moneyValues.getFirst().amount().doubleValue();
+                    });
+        }
+        CompletableFuture.allOf(futures).thenRun(() -> {
+            List<XYChart.Data<String, Number>> dataPoints = new ArrayList<>(12);
+            for (int i = 0; i < 12; i++) {
+                dataPoints.add(new XYChart.Data<>(dateLabels[i], values[i]));
+            }
+            Platform.runLater(() -> totalAssetDataPoints.addAll(dataPoints));
+        });
+    }
+}

src/main/java/module-info.java

@@ -20,4 +20,5 @@ module com.andrewlalis.perfin {
     opens com.andrewlalis.perfin.view.component to javafx.fxml;
     opens com.andrewlalis.perfin.view.component.validation to javafx.fxml;
     exports com.andrewlalis.perfin.model.history to javafx.graphics;
+    opens com.andrewlalis.perfin.view.component.module to javafx.fxml;
 }