56 lines
1.7 KiB
Dart
56 lines
1.7 KiB
Dart
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import 'package:drift/drift.dart';
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import 'package:drift/native.dart';
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import 'package:path/path.dart' as p;
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import 'package:path_provider/path_provider.dart';
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import 'dart:io';
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part 'formulas_database.g.dart';
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// Define the formulas table with a single text column for formula descriptions
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class Formulas extends Table {
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IntColumn get id => integer().autoIncrement()();
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TextColumn get formula => text()();
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}
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@DriftDatabase(tables: [Formulas])
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class FormulasDatabase extends _$FormulasDatabase {
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FormulasDatabase() : super(_openConnection());
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@override
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int get schemaVersion => 1;
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// Method to insert a new formula
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Future<int> insertFormula(String formulaText) {
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return into(formulas).insert(FormulasCompanion.insert(formula: formulaText));
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}
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// Method to get all formulas
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Future<List<Formula>> getAllFormulas() {
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return select(formulas).get();
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}
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// Method to get a formula by ID
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Future<Formula?> getFormulaById(int id) {
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return (select(formulas)..where((tbl) => tbl.id.equals(id))).getSingleOrNull();
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}
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// Method to update a formula
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Future<void> updateFormula(int id, String newFormula) {
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return (update(formulas)..where((tbl) => tbl.id.equals(id)))
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.write(FormulasCompanion.insert(formula: newFormula));
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}
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// Method to delete a formula
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Future<void> deleteFormula(int id) {
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return (delete(formulas)..where((tbl) => tbl.id.equals(id))).go();
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}
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}
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LazyDatabase _openConnection() {
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return LazyDatabase(() async {
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// For native platforms (Linux, Windows, macOS, Android, iOS)
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final dbFolder = await getApplicationDocumentsDirectory();
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final file = File(p.join(dbFolder.path, 'formulas.sqlite'));
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return NativeDatabase.createInBackground(file);
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});
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}
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