93 lines
No EOL
2.7 KiB
Dart
93 lines
No EOL
2.7 KiB
Dart
import 'dart:async';
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import 'dart:core';
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import 'package:ohthatsa/pages/practice/PracticeAnswer.dart';
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import 'package:ohthatsa/pages/practice/PracticeType.dart';
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import 'package:sqflite/sqflite.dart';
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import 'package:path/path.dart';
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class PracticeDatabase {
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static _onCreate(Database database, int version) async {
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String types = PracticeType.values.map((type) => "'${type.toString().split(".").last}'").join(", ");
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await database.execute('''
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CREATE TABLE PracticeSession (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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type TEXT CHECK( type IN ($types) ) NOT NULL
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);
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''');
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await database.execute('''
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CREATE TABLE PracticeAnswer (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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sessionId INTEGER NOT NULL,
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question INTEGER NOT NULL,
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answer INTEGER NOT NULL,
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time DATETIME NOT NULL,
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correct BOOLEAN NOT NULL,
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FOREIGN KEY(sessionId) REFERENCES PracticeSession(id)
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);
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''');
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await database.execute('''
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CREATE VIEW AnswersView AS
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SELECT
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PracticeSession.id as practice_id,
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PracticeAnswer.id as answer_id,
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PracticeSession.type as type,
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PracticeAnswer.question as question,
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PracticeAnswer.answer as answer,
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PracticeAnswer.correct as correct,
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PracticeAnswer.time as time
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FROM PracticeSession
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INNER JOIN PracticeAnswer on PracticeSession.id = PracticeAnswer.sessionId;
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''');
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}
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static Future<Database> getDatabase() async {
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var databasesPath = await getDatabasesPath();
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final databaseName = "answers.db";
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return await openDatabase(
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join(databasesPath, databaseName),
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version: 1,
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onCreate: _onCreate
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);
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}
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static insertAnswers(List<PracticeAnswer> answers, PracticeType practiceType) async {
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var db = await getDatabase();
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int sessionId = await db.insert("PracticeSession",
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<String, dynamic>{
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"type": practiceType.toString().split(".").last
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}
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);
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var batch = db.batch();
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answers.forEach((answer) {
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answer.sessionId = sessionId;
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batch.insert("PracticeAnswer", answer.toMap());
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});
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await batch.commit(noResult: true);
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getStats();
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}
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static Future<Map<String, dynamic>> getStats() async {
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var db = await getDatabase();
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List<Map<String, dynamic>> answers = await db.rawQuery('''
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SELECT
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type,
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SUM(correct = 1) AS correct,
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SUM(correct = 0) AS incorrect,
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(
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(SUM(correct = 1)*1.0) /
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(SUM(correct = 0) + SUM(correct = 1))
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) as ratio
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FROM
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AnswersView
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GROUP BY
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type;
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''');
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print(answers);
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var first = answers.first;
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print(first["practice_id"]);
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print("something else");
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}
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} |