quantum_sqlite 0.1.1

A wrapper around the sqlite library. Using libsimple and jieba to support Chinese word segmentation and full-text search.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:flutter/services.dart';
import 'package:quantum_sqlite/quantum_sqlite.dart';
import 'package:sqlite3/sqlite3.dart' hide Row;

void main() {
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({Key? key}) : super(key: key);

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  final db = sqlite3.openInMemory();
  final TextEditingController _controller = TextEditingController();
  String _platformVersion = 'Unknown';
  bool _enableJieBa = false;
  String? _dashboard;

  @override
  void initState() {
    super.initState();
    initPlatformState();

    db.loadSimpleExtension();
    // create table
    db.execute("CREATE VIRTUAL TABLE t1 USING fts5(x, tokenize = 'simple')");
    // insert some data
    db.execute(
        """
insert into t1(x) values
 ('周杰伦 Jay Chou:我已分不清，你是友情还是错过的爱情'), 
('周杰伦 Jay Chou:最美的不是下雨天，是曾与你躲过雨的屋檐'),
 ('I love China! 我爱中国！我是中华人民共和国公民！'),
  ('@English &special _characters."''bacon-&and''-eggs%'),
  ('政府は30日、世界文化遺産への登録を目指す「富士山」（山梨県、静岡県）について、国連教育科学文化機関（ユネスコ）の諮問機関から登録を求める勧告が出たと発表した。構成資産の一つ、三保松原（静岡市）の除外が条件。ユネスコが６月にカンボジアで開く世界遺産委員会が最終決定する。勧告が覆った例は少なく、登録されれば国内で17件目の世界遺産になる。'),
  ('서는 안될 정도로 꼭 요긴한 것들 만일까? 살펴볼수록 없어도 좋을 만한 것들이 적지 않다.')
  """);
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    String platformVersion;
    // Platform messages may fail, so we use a try/catch PlatformException.
    // We also handle the message potentially returning null.
    try {
      platformVersion =
          await Quantum.platformVersion ?? 'Unknown platform version';
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
          appBar: AppBar(
            title: const Text('Plugin example app'),
          ),
          body: Column(children: [
            SizedBox(
              child: Text('Running on: $_platformVersion\n'),
            ),
            Padding(
              padding: const EdgeInsets.symmetric(vertical: 16),
              child: TextField(controller: _controller),
            ),
            SwitchListTile(
              value: _enableJieBa,
              onChanged: (value) {
                setState(() {
                  _enableJieBa = value;
                });
              },
              title: const Text('Enable JieBa'),
            ),
            SizedBox(
                child: TextButton(
                    child: const Text('Search'),
                    onPressed: () async {
                      final queryType =
                      _enableJieBa ? 'jieba_query' : 'simple_query';
                      final ret = db.select(
                          "select rowid as id, simple_highlight(t1, 0, '[', ']')"
                              " as info from t1 where x match $queryType(?)",
                          [_controller.text]);
                      setState(() {
                        _dashboard = ret.toString();
                      });
                    })),
            if (_dashboard != null)
              Padding(
                padding: const EdgeInsets.symmetric(vertical: 16),
                child: Text(
                  _dashboard!,
                  style: const TextStyle(fontSize: 20),
                ),
              ),
          ])),
    );
  }
}