Add ItemType for determining which DB methods should be called based on the screen data. Begin implementing it.

lib/db.dart

@@ -9,7 +9,7 @@ import 'package:sqflite/sqflite.dart';
 
 // Local
 import '/models/expense.dart';
-import '/models/tracked_type_recurring.dart';
+import '/models/tracked_item.dart';
 
 // Leaned on this example:
 //   https://learnflutterwithme.com/sqlite
@@ -77,7 +77,7 @@ class DatabaseHelper {
     return expenseList;
   }
 
-  Future<int> addExpense(RecurringTrackedType expense) async {
+  Future<int> addExpense(TrackedItem expense) async {
     Database db = await instance.db;
     return await db.insert(
       "expense",
@@ -94,7 +94,7 @@ class DatabaseHelper {
     );
   }
 
-  Future<int> updateExpense(RecurringTrackedType expense) async {
+  Future<int> updateExpense(TrackedItem expense) async {
     Database db = await instance.db;
     return await db.update(
       "expense",

lib/models/asset.dart

@@ -1,6 +1,7 @@
-import '/models/tracked_type.dart';
+// Local
+import '/models/tracked_item.dart';
 
-class Asset extends TrackedType {
+class Asset extends TrackedItem {
   static String amountText = "Amount";
 
   Asset({

lib/models/database_backup.dart

@@ -29,7 +29,7 @@ class DatabaseBackup {
             'id': e.id,
             'name': e.name,
             'cost': e.amount,
-            'frequency': e.frequency.title,
+            'frequency': e.frequency!.title,
             'description': e.description,
           },
       ],
@@ -39,7 +39,7 @@ class DatabaseBackup {
             'id': i.id,
             'name': i.name,
             'revenue': i.amount,
-            'frequency': i.frequency.title,
+            'frequency': i.frequency!.title,
             'description': i.description,
           },
       ],

lib/models/expense.dart

@@ -1,12 +1,15 @@
 // Local
-import '/models/tracked_type_recurring.dart';
+import 'package:flutter_expense_tracker/models/item_type.dart';
+
+import '/models/tracked_item.dart';
 import '/models/frequency.dart';
 
-class Expense extends RecurringTrackedType {
+class Expense extends TrackedItem {
   static String amountText = "Cost";
 
   Expense({
     super.id,
+    super.type = ItemType.expense,
     required super.name,
     required super.amount,
     required super.frequency,
@@ -29,7 +32,7 @@ class Expense extends RecurringTrackedType {
       'id': id,
       'name': name,
       'cost': amount,
-      'frequency': frequency.title,
+      'frequency': frequency!.title,
       'description': description,
     };
   }

lib/models/income.dart

@@ -1,8 +1,8 @@
 // Local
-import '/models/tracked_type_recurring.dart';
+import '/models/tracked_item.dart';
 import '/models/frequency.dart';
 
-class Income extends RecurringTrackedType {
+class Income extends TrackedItem {
   static String amountText = "Revenue";
 
   Income({
@@ -29,7 +29,7 @@ class Income extends RecurringTrackedType {
       'id': id,
       'name': name,
       'revenue': amount,
-      'frequency': frequency.title,
+      'frequency': frequency!.title,
       'description': description,
     };
   }

lib/models/item_type.dart

@@ -0,0 +1,22 @@
+enum ItemType {
+  expense(
+    title: "Expense",
+    plural: "Expenses",
+  ),
+  income(
+    title: "Income",
+    plural: "Incomes",
+  ),
+  asset(
+    title: "Asset",
+    plural: "Assets",
+  );
+
+  const ItemType({
+    required this.title,
+    required this.plural,
+  });
+
+  final String title;
+  final String plural;
+}

lib/models/tracked_item.dart

@@ -0,0 +1,53 @@
+// Local
+import 'package:flutter_expense_tracker/models/item_type.dart';
+
+import '/models/frequency.dart';
+
+abstract class TrackedItem {
+  int? id;
+  ItemType? type;
+  String name;
+  double amount;
+  Frequency? frequency;
+  String description;
+
+  TrackedItem({
+    this.id,
+    this.type,
+    required this.name,
+    required this.amount,
+    this.frequency,
+    required this.description,
+  });
+
+  static String amountText = "Amount";
+  String getAmountText() => amountText;
+
+  @override
+  String toString() {
+    return toMap().toString();
+  }
+
+  double calcComparableAmountYearly() {
+    return frequency == null ? 0 : amount * frequency!.timesPerYear;
+  }
+
+  double calcComparableAmountDaily() {
+    return frequency == null ? 0 : amount / frequency!.numDays;
+  }
+
+  Map<String, dynamic> toMap() {
+    return frequency == null ? {
+      'id': id,
+      'name': name,
+      'amount': amount,
+      'description': description,
+    } : {
+      'id': id,
+      'name': name,
+      'amount': amount,
+      'frequency': frequency!.title,
+      'description': description,
+    };
+  }
+}

lib/models/tracked_type.dart

@@ -1,30 +0,0 @@
-abstract class TrackedType {
-  int? id;
-  String name;
-  double amount;
-  String description;
-
-  TrackedType({
-    this.id,
-    required this.name,
-    required this.amount,
-    required this.description,
-  });
-
-  static String amountText = "Amount";
-  String getAmountText() => amountText;
-
-  @override
-  String toString() {
-    return toMap().toString();
-  }
-
-  Map<String, dynamic> toMap() {
-    return {
-      'id': id,
-      'name': name,
-      'amount': amount,
-      'description': description,
-    };
-  }
-}

lib/models/tracked_type_recurring.dart

@@ -1,34 +0,0 @@
-// Local
-import '/models/tracked_type.dart';
-import '/models/frequency.dart';
-
-abstract class RecurringTrackedType extends TrackedType {
-  Frequency frequency;
-
-  RecurringTrackedType({
-    super.id,
-    required super.name,
-    required super.amount,
-    required this.frequency,
-    required super.description,
-  });
-
-  double calcComparableAmountYearly() {
-    return amount * frequency.timesPerYear;
-  }
-
-  double calcComparableAmountDaily() {
-    return amount / frequency.numDays;
-  }
-
-  @override
-  Map<String, dynamic> toMap() {
-    return {
-      'id': id,
-      'name': name,
-      'amount': amount,
-      'frequency': frequency.title,
-      'description': description,
-    };
-  }
-}

lib/pages/asset.dart

@@ -1,12 +0,0 @@
-import 'package:flutter/material.dart';
-
-class AssetPage extends StatelessWidget {
-  const AssetPage({
-    super.key,
-  });
-
-  @override
-  Widget build(BuildContext context) {
-    return Placeholder();
-  }
-}

lib/pages/home.dart

@@ -1,14 +1,14 @@
 // Flutter
 import 'package:flutter/material.dart';
+import 'package:flutter_expense_tracker/models/item_type.dart';
 import 'dart:io';
 
 // Local
-import '/pages/expense.dart';
-import '/pages/income.dart';
-import '/pages/asset.dart';
+import '/pages/tracked_item.dart';
 import '/pages/report.dart';
 import '/pages/settings.dart';
 import '/pages/help.dart';
+import '/db.dart';
 
 class HomePage extends StatefulWidget {
   const HomePage({
@@ -32,14 +32,15 @@ class _HomePageState extends State<HomePage> {
     Widget? dialog;
     switch (pageSelected) {
       case 0:
-        page = ExpensePage();
-        dialog = RecurringTrackedTypeInputDialog(
+        page = TrackedItemPage(assetsToLoad: DatabaseHelper.instance.getExpenses());
+        dialog = TrackedItemInputDialog(
           notifyParent: refresh,
+          type: ItemType.expense,
         );
       case 1:
-        page = IncomePage();
+        page = Placeholder();
       case 2:
-        page = AssetPage();
+        page = Placeholder();
       case 3:
         page = ProjectionPage();
       case 4:

lib/pages/income.dart

@@ -1,12 +0,0 @@
-import 'package:flutter/material.dart';
-
-class IncomePage extends StatelessWidget {
-  const IncomePage({
-    super.key,
-  });
-
-  @override
-  Widget build(BuildContext context) {
-    return Placeholder();
-  }
-}

lib/pages/report.dart

@@ -2,8 +2,8 @@
 import 'package:flutter/material.dart';
 
 // Local
-import 'package:flutter_expense_tracker/db.dart';
-import 'package:flutter_expense_tracker/models/tracked_type_recurring.dart';
+import '/db.dart';
+import '/models/tracked_item.dart';
 
 /// TODO:
 /// - Expenses (total number, totals by day / month / year)
@@ -57,31 +57,39 @@ class SummaryCardForTotals extends StatelessWidget {
     required this.summaryTypeLabel,
   });
 
-  final Future<List<RecurringTrackedType>> list;
+  final Future<List<TrackedItem>> list;
   final String summaryTypeLabel;
 
   @override
   Widget build(BuildContext context) {
-    return FutureBuilder<List<RecurringTrackedType>>(
+    return FutureBuilder<List<TrackedItem>>(
         future: list,
         builder: (
           BuildContext context,
-          AsyncSnapshot<List<RecurringTrackedType>> snapshot,
+          AsyncSnapshot<List<TrackedItem>> snapshot,
         ) {
           if (!snapshot.hasData) {
             return Text('Loading $summaryTypeLabel Section...');
           }
           double dailyTotal = 0, monthlyTotal = 0, yearlyTotal = 0;
-          for (RecurringTrackedType e in snapshot.data!) {
+          for (TrackedItem e in snapshot.data!) {
             dailyTotal += e.calcComparableAmountDaily();
             monthlyTotal += e.calcComparableAmountYearly() / 12;
             yearlyTotal += e.calcComparableAmountYearly();
           }
+          String dailyEstimate =
+                  dailyTotal.toStringAsFixed(3).endsWith("0") ? "" : "~",
+              monthlyEstimate =
+                  monthlyTotal.toStringAsFixed(3).endsWith("0") ? "" : "~",
+              yearlyEstimate =
+                  yearlyTotal.toStringAsFixed(3).endsWith("0") ? "" : "~";
           return SummaryCard(
             name: "$summaryTypeLabel Totals",
-            leftText: "${dailyTotal.toStringAsFixed(2)} Daily",
-            middleText: "${monthlyTotal.toStringAsFixed(2)} Monthly",
-            rightText: "${yearlyTotal.toStringAsFixed(2)} Yearly",
+            leftText: "$dailyEstimate${dailyTotal.toStringAsFixed(2)} Daily",
+            middleText:
+                "$monthlyEstimate${monthlyTotal.toStringAsFixed(2)} Monthly",
+            rightText:
+                "$yearlyEstimate${yearlyTotal.toStringAsFixed(2)} Yearly",
           );
         });
   }
@@ -104,27 +112,41 @@ class SummaryCard extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Card(
+      color: Theme.of(context).cardColor,
       child: Padding(
         padding: const EdgeInsets.all(8.0),
-        child: Column(
-          children: [
-            Row(
-              children: [
-                Text(leftText),
-                Spacer(),
-                Center(
-                  child: Column(
-                    children: [
-                      Text(name),
-                      Text(middleText),
-                    ],
-                  ),
+        child: Card(
+          color: Theme.of(context).highlightColor,
+          child: Column(
+            children: [
+              Text(
+                name,
+                style: TextStyle(
+                  decoration: TextDecoration.underline,
+                  fontSize: 16
                 ),
-                Spacer(),
-                Text(rightText),
-              ],
-            ),
-          ],
+              ),
+              Row(
+                children: [
+                  Spacer(
+                    flex: 3,
+                  ),
+                  Text(leftText),
+                  Spacer(
+                    flex: 1,
+                  ),
+                  Text(middleText),
+                  Spacer(
+                    flex: 1,
+                  ),
+                  Text(rightText),
+                  Spacer(
+                    flex: 3,
+                  ),
+                ],
+              ),
+            ],
+          ),
         ),
       ),
     );

lib/pages/tracked_item.dart

@@ -1,25 +1,30 @@
 // Flutter
 import 'package:flutter/material.dart';
+import 'package:flutter_expense_tracker/models/asset.dart';
+import 'package:flutter_expense_tracker/models/income.dart';
 
 // Local
-import '/models/tracked_type.dart';
-import '/models/tracked_type_recurring.dart';
+import '/models/tracked_item.dart';
+import '/models/item_type.dart';
 import '/models/expense.dart';
 import '/models/frequency.dart';
 import '/db.dart';
 
 // TODO: Make this a generic UI based on a superclass of Expense, Income, and Assets.
 
-class ExpensePage extends StatefulWidget {
-  const ExpensePage({
+class TrackedItemPage extends StatefulWidget {
+  final Future<List<TrackedItem>> assetsToLoad;
+
+  const TrackedItemPage({
     super.key,
+    required this.assetsToLoad,
   });
 
   @override
-  State<ExpensePage> createState() => _ExpensePageState();
+  State<TrackedItemPage> createState() => _TrackedItemPageState();
 }
 
-class _ExpensePageState extends State<ExpensePage> {
+class _TrackedItemPageState extends State<TrackedItemPage> {
   refresh() {
     setState(() {});
   }
@@ -28,10 +33,10 @@ class _ExpensePageState extends State<ExpensePage> {
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
 
-    return FutureBuilder<List<RecurringTrackedType>>(
-        future: DatabaseHelper.instance.getExpenses(),
-        builder: (BuildContext context,
-            AsyncSnapshot<List<RecurringTrackedType>> snapshot) {
+    return FutureBuilder<List<TrackedItem>>(
+        future: widget.assetsToLoad,
+        builder:
+            (BuildContext context, AsyncSnapshot<List<TrackedItem>> snapshot) {
           if (!snapshot.hasData) {
             return Text('Loading...');
           }
@@ -42,65 +47,73 @@ class _ExpensePageState extends State<ExpensePage> {
           );
           return snapshot.data!.isEmpty
               ? Text(
-                  "Add expenses to get started.",
+                  "Add items to get started.",
                   softWrap: true,
                 )
               : ListView.builder(
                   itemCount: snapshot.data!.length,
                   itemBuilder: (_, index) {
-                    //List<Expense> expenses = snapshot.data!;
-                    final RecurringTrackedType curr = snapshot.data![index];
+                    final TrackedItem curr = snapshot.data![index];
 
                     final itemKey = Key(curr.id!.toString());
                     final String itemTitle = curr.name;
+
                     final String itemAmount;
-                    // TODO: How can we do RecurringTrackedType vs TrackedType here
-                    // if the Widgets are expecting RecurringTrackedType, but we
-                    // need to be using Frequency? Change to only have one abstract
-                    // class and make it nully again? Hmmm...
-                    //if (curr is RecurringTrackedType && curr.frequency != null) {
+                    if (curr.frequency != null) {
                       itemAmount =
-                          "${curr.amount.toStringAsFixed(2)} ${curr.frequency.title}";
-                    /*} else {
+                          "${curr.amount.toStringAsFixed(2)} ${curr.frequency!.title}";
+                    } else {
                       itemAmount = curr.amount.toStringAsFixed(2);
-                    }*/
+                    }
                     final String itemDescription = curr.description;
 
-                    final double itemDayAmount =
-                        curr.calcComparableAmountDaily();
-                    final String estimateSymbolDaily = curr.frequency.numDays
-                                .toStringAsFixed(2)
-                                .endsWith(".00") &&
-                            itemDayAmount.toStringAsFixed(3).endsWith("0")
-                        ? ""
-                        : "~";
+                    final double itemDayAmount, itemMonthAmount, itemYearAmount;
+                    final String estimateSymbolDaily,
+                        estimateSymbolMonthly,
+                        estimateSymbolYearly;
 
-                    final double itemMonthAmount =
-                        (curr.calcComparableAmountYearly() / 12);
-                    final String estimateSymbolMonthly = curr
-                                .frequency.timesPerYear
-                                .toStringAsFixed(2)
-                                .endsWith(".00") &&
-                            itemMonthAmount.toStringAsFixed(3).endsWith("0")
-                        ? ""
-                        : "~";
+                    if (curr.frequency != null) {
+                      itemDayAmount = curr.calcComparableAmountDaily();
+                      estimateSymbolDaily = curr.frequency!.numDays
+                                  .toStringAsFixed(2)
+                                  .endsWith(".00") &&
+                              itemDayAmount.toStringAsFixed(3).endsWith("0")
+                          ? ""
+                          : "~";
 
-                    final double itemYearAmount =
-                        curr.calcComparableAmountYearly();
-                    final String estimateSymbolYearly = curr
-                                .frequency.timesPerYear
-                                .toStringAsFixed(2)
-                                .endsWith(".00") &&
-                            itemYearAmount.toStringAsFixed(3).endsWith("0")
-                        ? ""
-                        : "~";
+                      itemMonthAmount =
+                          (curr.calcComparableAmountYearly() / 12);
+                      estimateSymbolMonthly = curr.frequency!.timesPerYear
+                                  .toStringAsFixed(2)
+                                  .endsWith(".00") &&
+                              itemMonthAmount.toStringAsFixed(3).endsWith("0")
+                          ? ""
+                          : "~";
 
-                    final String itemTopText =
-                        "$estimateSymbolDaily${itemDayAmount.toStringAsFixed(2)} ${Frequency.daily.title}";
-                    final String itemMiddleText =
-                        "$estimateSymbolMonthly${itemMonthAmount.toStringAsFixed(2)} ${Frequency.monthly.title}";
-                    final String itemBottomText =
-                        "$estimateSymbolYearly${itemYearAmount.toStringAsFixed(2)} ${Frequency.yearly.title}";
+                      itemYearAmount = curr.calcComparableAmountYearly();
+                      estimateSymbolYearly = curr.frequency!.timesPerYear
+                                  .toStringAsFixed(2)
+                                  .endsWith(".00") &&
+                              itemYearAmount.toStringAsFixed(3).endsWith("0")
+                          ? ""
+                          : "~";
+                    } else {
+                      itemDayAmount = -1;
+                      estimateSymbolDaily = "";
+                      itemMonthAmount = curr.amount;
+                      estimateSymbolMonthly = "";
+                      itemYearAmount = -1;
+                      estimateSymbolYearly = "";
+                    }
+                    final String itemTopText = itemDayAmount < 0
+                        ? ""
+                        : "$estimateSymbolDaily${itemDayAmount.toStringAsFixed(2)} ${Frequency.daily.title}";
+                    final String itemMiddleText = itemMonthAmount < 0
+                        ? ""
+                        : "$estimateSymbolMonthly${itemMonthAmount.toStringAsFixed(2)} ${Frequency.monthly.title}";
+                    final String itemBottomText = itemYearAmount < 0
+                        ? ""
+                        : "$estimateSymbolYearly${itemYearAmount.toStringAsFixed(2)} ${Frequency.yearly.title}";
 
                     return Padding(
                       padding: const EdgeInsets.all(4.0),
@@ -131,17 +144,28 @@ class _ExpensePageState extends State<ExpensePage> {
                             snapshot.data!.remove(curr);
                             switch (direction) {
                               case DismissDirection.startToEnd:
-                                DatabaseHelper.instance.removeExpense(curr.id!);
+                                if (curr is Expense) {
+                                  DatabaseHelper.instance
+                                      .removeExpense(curr.id!);
+                                } else if (curr is Income) {
+                                  // TODO
+                                } else if (curr is Asset) {
+                                  // TODO
+                                } else {
+                                  throw UnimplementedError(
+                                      "Cannot remove unimplemented item type.");
+                                }
                                 break;
                               case DismissDirection.endToStart:
                                 // Open an edit dialog, then remove the item from the list.
                                 showDialog(
                                   context: context,
                                   builder: (_) => AlertDialog(
-                                    content: RecurringTrackedTypeInputDialog(
+                                    content: TrackedItemInputDialog(
                                       notifyParent: refresh,
                                       entry: curr,
                                       amountText: curr.getAmountText(),
+                                      type: curr.type!,
                                     ),
                                   ),
                                 );
@@ -218,26 +242,26 @@ class _ExpensePageState extends State<ExpensePage> {
   }
 }
 
-class RecurringTrackedTypeInputDialog extends StatefulWidget {
+class TrackedItemInputDialog extends StatefulWidget {
   final Function() notifyParent;
-  final RecurringTrackedType? entry;
+  final TrackedItem? entry;
   final String? amountText;
+  final ItemType? type;
 
-  const RecurringTrackedTypeInputDialog({
+  const TrackedItemInputDialog({
     super.key,
     required this.notifyParent,
     this.entry,
     this.amountText,
+    this.type,
   });
 
   @override
-  State<RecurringTrackedTypeInputDialog> createState() =>
-      _RecurringTrackedTypeInputDialogState();
+  State<TrackedItemInputDialog> createState() => _TrackedItemInputDialogState();
 }
 
-class _RecurringTrackedTypeInputDialogState
-    extends State<RecurringTrackedTypeInputDialog> {
-  final _expenseFormKey = GlobalKey<FormState>();
+class _TrackedItemInputDialogState extends State<TrackedItemInputDialog> {
+  final _formKey = GlobalKey<FormState>();
 
   int? _id;
   String _name = "";
@@ -247,16 +271,23 @@ class _RecurringTrackedTypeInputDialogState
 
   @override
   Widget build(BuildContext context) {
+    if (widget.type == null &&
+        (widget.entry != null && widget.entry!.type == null)) {
+      throw FlutterError("No ItemType provided for TrackedItemInputDialog.");
+    }
+    ItemType? _type = widget.type;
+
     if (widget.entry != null) {
       _id = widget.entry!.id;
       _name = widget.entry!.name;
       _amount = widget.entry!.amount;
-      _freq = widget.entry!.frequency;
+      widget.entry!.frequency == null ? null : _freq = widget.entry!.frequency!;
       _desc = widget.entry!.description;
+      _type = widget.entry!.type!;
     }
 
     String amountText =
-        widget.amountText != null ? widget.amountText! : TrackedType.amountText;
+        widget.amountText != null ? widget.amountText! : TrackedItem.amountText;
 
     return Column(
       // prevent AlertDialog from taking full vertical height.
@@ -268,7 +299,20 @@ class _RecurringTrackedTypeInputDialogState
             onPressed: () {
               if (widget.entry != null) {
                 setState(() {
-                  DatabaseHelper.instance.addExpense(widget.entry!);
+                  switch (_type) {
+                    case ItemType.expense:
+                      DatabaseHelper.instance.addExpense(widget.entry!);
+                      break;
+                    case ItemType.income:
+                      // TODO
+                      break;
+                    case ItemType.asset:
+                      // TODO
+                      break;
+                    default:
+                      throw UnimplementedError(
+                          "Cannot add unimplemented type.");
+                  }
                   widget.notifyParent();
                 });
               }
@@ -281,7 +325,7 @@ class _RecurringTrackedTypeInputDialogState
           insetPadding: EdgeInsets.all(0),
           title: Center(
             child: widget.entry == null
-                ? Text("New Expense")
+                ? Text("New ${_type!.title}")
                 : Text("Edit Expense"),
           ),
           content: FutureBuilder<List<Expense>>(
@@ -293,7 +337,7 @@ class _RecurringTrackedTypeInputDialogState
                 }
                 List<Expense> expenses = snapshot.data!;
                 return Form(
-                  key: _expenseFormKey,
+                  key: _formKey,
                   child: Column(
                     mainAxisSize: MainAxisSize.min,
                     children: [
@@ -416,8 +460,8 @@ class _RecurringTrackedTypeInputDialogState
             Center(
               child: ElevatedButton.icon(
                 onPressed: () {
-                  if (_expenseFormKey.currentState!.validate()) {
-                    _expenseFormKey.currentState!.save();
+                  if (_formKey.currentState!.validate()) {
+                    _formKey.currentState!.save();
                     setState(() {
                       Expense expense = Expense(
                         id: _id,