Merge pull request #527 from lucaantonelli/feat-frequent-accounts

feat: frequent accounts list

Author: theperu

lib/pages/transactions/create_transaction/widgets/account_selector.dart

@@ -27,6 +27,7 @@ class _AccountSelectorState extends ConsumerState<AccountSelector> {
   @override
   Widget build(BuildContext context) {
     final accountsList = ref.watch(activeAccountsProvider);
+    final frequentAccounts = ref.watch(frequentAccountsProvider);
     final fromAccount = ref.watch(selectedBankAccountProvider);
     final toAccount = ref.watch(bankAccountTransferProvider);
 
@@ -72,7 +73,7 @@ class _AccountSelectorState extends ConsumerState<AccountSelector> {
                     color: Theme.of(context).colorScheme.surface,
                     height: 74,
                     width: double.infinity,
-                    child: accountsList.when(
+                    child: frequentAccounts.when(
                       data: (accounts) => ListView.builder(
                         itemCount: (accounts.length > 4) ? 4 : accounts.length,
                         scrollDirection: Axis.horizontal,

lib/providers/accounts_provider.dart

@@ -265,3 +265,8 @@ Future<List<BankAccount>> activeAccounts(Ref ref) async {
   final accounts = ref.watch(accountsProvider).value ?? [];
   return accounts.where((account) => account.deletedAt == null).toList();
 }
+
+@riverpod
+Future<List<BankAccount>> frequentAccounts(Ref ref) async {
+  return await ref.read(accountRepositoryProvider).selectFrequentAccounts();
+}

lib/services/database/repositories/account_repository.dart

@@ -103,6 +103,27 @@ class AccountRepository {
     return result.map((json) => BankAccount.fromJson(json)).toList();
   }
 
+  Future<List<BankAccount>> selectFrequentAccounts() async {
+    final db = await _sossoldiDB.database;
+    // Select the last 100 transactions, group by account and return the
+    // top 5 most used accounts ordered by usage count desc.
+    final result = await db.rawQuery('''
+        SELECT b.*
+        FROM "$bankAccountTable" b
+        JOIN (
+          SELECT * FROM "$transactionTable"
+          ORDER BY "${TransactionFields.date}" DESC
+          LIMIT 100
+        ) t ON t."${TransactionFields.idBankAccount}" = b."${BankAccountFields.id}" OR t."${TransactionFields.idBankAccountTransfer}" = b."${BankAccountFields.id}"
+        WHERE b."${BankAccountFields.active}" = 1 AND ${BankAccountFields.deletedAt} IS NULL
+        GROUP BY b."${BankAccountFields.id}"
+        ORDER BY COUNT(t."${TransactionFields.id}") DESC
+        LIMIT 5
+      ''');
+
+    return result.map((json) => BankAccount.fromJson(json)).toList();
+  }
+
   Future<int> updateItem(BankAccount item) async {
     final db = await _sossoldiDB.database;