53 lines
No EOL
1.7 KiB
Dart
53 lines
No EOL
1.7 KiB
Dart
import 'package:drift/drift.dart';
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import 'package:drift/web.dart';
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part 'formulas_database_web.g.dart';
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// Define the FORMULAELEMENT table to store both formulas and units as text
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class FormulaElements extends Table {
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IntColumn get id => integer().autoIncrement()();
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TextColumn get elementText => text()();
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}
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@DriftDatabase(tables: [FormulaElements])
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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 element (either formula or unit)
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Future<int> insertFormulaElement(String elementText) {
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return into(formulaElements).insert(FormulaElementsCompanion.insert(elementText: elementText));
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}
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// Method to get all formula elements
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Future<List<FormulaElement>> getAllFormulaElements() {
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return select(formulaElements).get();
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}
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// Method to get a formula element by ID
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Future<FormulaElement?> getFormulaElementById(int id) {
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return (select(formulaElements)..where((tbl) => tbl.id.equals(id))).getSingleOrNull();
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}
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// Method to update a formula element
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Future<void> updateFormulaElement(int id, String newElementText) {
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return (update(formulaElements)..where((tbl) => tbl.id.equals(id)))
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.write(FormulaElementsCompanion.insert(elementText: newElementText));
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}
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// Method to delete a formula element
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Future<void> deleteFormulaElement(int id) {
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return (delete(formulaElements)..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 web, use the web implementation
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return WebDatabase.withStorage(
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await DriftWebStorage.indexedDb('formulas_db'),
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);
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});
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} |