94 lines
3.6 KiB
Dart
94 lines
3.6 KiB
Dart
import 'models.dart';
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class ReviewCheckResult {
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const ReviewCheckResult({required this.complete, required this.message});
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final bool complete;
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final String message;
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}
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/// Checks only the minimum information a learner needs to produce in an A0
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/// review. It intentionally accepts common contractions and variable slot
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/// values instead of comparing an answer with one fixed sentence.
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class ReviewFeedback {
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const ReviewFeedback._();
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static ReviewCheckResult check(ReviewItem item, String input) {
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final text = input.toLowerCase().replaceAll('’', "'");
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final tokens = RegExp(
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r"[a-z]+(?:'[a-z]+)?",
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).allMatches(text).map((match) => match.group(0)!).toSet();
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bool has(String token) => tokens.contains(token);
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bool phrase(String value) => text.contains(value);
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bool hasAny(Iterable<String> values) => values.any(has);
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final introduction =
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phrase("i'm") || phrase('i am') || phrase('my name is');
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final itIs = phrase("it's") || phrase('it is');
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final numberWords = RegExp(
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r'\b(zero|one|two|three|four|five|six|seven|eight|nine|ten)\b',
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).allMatches(text).length;
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final complete = switch (item.id) {
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'A0-P01' => introduction && tokens.length >= 2,
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'A0-P02' => (phrase("what's your name") || phrase('what is your name')),
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'A0-P03' => phrase('nice to meet you'),
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'A0-P04' => phrase('how do you spell'),
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'A0-P05' => phrase('how are you'),
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'A0-P06' => introduction && hasAny(['good', 'okay', 'tired']),
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'A0-P07' =>
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phrase("what's your phone number") ||
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phrase('what is your phone number'),
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'A0-P08' =>
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(phrase('my number is') || numberWords >= 3) && numberWords >= 3,
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'A0-P09' => phrase("what's this") || phrase('what is this'),
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'A0-P10' => itIs && hasAny(['book', 'pen', 'bag', 'key']),
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'A0-P11' => phrase('where are you from'),
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'A0-P12' => introduction && has('from') && tokens.length >= 3,
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'A0-P13' => phrase('this is my') && tokens.length >= 4,
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'A0-P14' => phrase('what day is it'),
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'A0-P15' =>
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itIs &&
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hasAny([
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'monday',
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'tuesday',
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'wednesday',
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'thursday',
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'friday',
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'saturday',
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'sunday',
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]),
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'A0-P16' => phrase('what time is it'),
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'A0-P17' =>
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itIs &&
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(has('clock') ||
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has("o'clock") ||
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has('oclock') ||
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phrase("o'clock")),
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'A0-P18' => introduction && has('like') && tokens.length >= 3,
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'A0-P19' => phrase('do you like'),
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'A0-P20' =>
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phrase('please say that again') || phrase('please speak slowly'),
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_ when item.id.startsWith('A0-W') => tokens.contains(
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item.target.toLowerCase(),
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),
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_ => tokens.length >= 2,
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};
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return ReviewCheckResult(
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complete: complete,
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message: complete ? '表达已完成，可以进入下一次复习安排。' : _hint(item.id),
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);
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}
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static String _hint(String id) => switch (id) {
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'A0-P01' => '用 I’m / I am 或 My name is 介绍一个名字。',
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'A0-P02' => '试着问：What’s your name?',
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'A0-P04' => '问对方怎样拼写：How do you spell …?',
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'A0-P08' => '说出至少三个英文数字，也可用 My number is … 开头。',
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'A0-P10' => '用 It’s / It is 加上一个物品。',
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'A0-P12' => '用 I’m from … 说出一个地点。',
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'A0-P17' => '用 It’s … o’clock 说整点时间。',
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'A0-P18' => '用 I like … 说一项喜好。',
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_ => '再补充本次目标中的关键英文词或句型。',
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};
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}
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