Add methods for accessing Incomes and Assets in the database.

lib/db.dart

@@ -9,6 +9,8 @@ import 'package:sqflite/sqflite.dart';
 
 // Local
 import '/models/expense.dart';
+import '/models/income.dart';
+import '/models/asset.dart';
 import '/models/tracked_item.dart';
 
 // Leaned on this example:
@@ -118,9 +120,98 @@ class DatabaseHelper {
 
   /// Income Section
   ///
+  Future<List<Income>> getIncomes() async {
+    Database db = await instance.db;
+    var incomes = await db.query("income", orderBy: "name");
+    List<Income> incomeList = incomes.isNotEmpty
+        ? incomes.map((c) => Income.fromMap(c)).toList()
+        : [];
+    return incomeList;
+  }
+
+  Future<int> addIncome(TrackedItem income) async {
+    Database db = await instance.db;
+    return await db.insert(
+      "income",
+      income.toMap(),
+    );
+  }
+
+  Future<int> removeIncome(int id) async {
+    Database db = await instance.db;
+    return await db.delete(
+      "income",
+      where: "id = ?",
+      whereArgs: [id],
+    );
+  }
+
+  Future<int> updateIncome(TrackedItem income) async {
+    Database db = await instance.db;
+    return await db.update(
+      "income",
+      income.toMap(),
+      where: "id = ?",
+      whereArgs: [income.id],
+    );
+  }
+
+  Future<bool> checkIncomeNameExists(String name) async {
+    Database db = await instance.db;
+    var incomes = await db.query(
+      "income",
+      where: "name = ?",
+      whereArgs: [name],
+    );
+    return incomes.isNotEmpty;
+  }
 
   ///
   /// Liquid Asset Section
+  Future<List<Asset>> getAssets() async {
+    Database db = await instance.db;
+    var assets = await db.query("asset", orderBy: "name");
+    List<Asset> assetList =
+        assets.isNotEmpty ? assets.map((c) => Asset.fromMap(c)).toList() : [];
+    return assetList;
+  }
+
+  Future<int> addAsset(TrackedItem asset) async {
+    Database db = await instance.db;
+    return await db.insert(
+      "asset",
+      asset.toMap(),
+    );
+  }
+
+  Future<int> removeAsset(int id) async {
+    Database db = await instance.db;
+    return await db.delete(
+      "asset",
+      where: "id = ?",
+      whereArgs: [id],
+    );
+  }
+
+  Future<int> updateAsset(TrackedItem asset) async {
+    Database db = await instance.db;
+    return await db.update(
+      "asset",
+      asset.toMap(),
+      where: "id = ?",
+      whereArgs: [asset.id],
+    );
+  }
+
+  Future<bool> checkAssetNameExists(String name) async {
+    Database db = await instance.db;
+    var assets = await db.query(
+      "asset",
+      where: "name = ?",
+      whereArgs: [name],
+    );
+    return assets.isNotEmpty;
+  }
 
   ///
 }