整个课程和数据UI重新设计版本

kouyu_english/lib/core/writing_feedback.dart

@@ -1,3 +1,5 @@
+import 'courses/courses.dart';
+
 class WritingCheckResult {
   const WritingCheckResult({required this.complete, required this.message});
 
@@ -5,84 +7,24 @@ class WritingCheckResult {
   final String message;
 }
 
-/// A deliberately small offline checker for teaching tasks. It checks only
-/// the essential A0 information, accepts variable names/places, and never
-/// claims to grade pronunciation or nuanced grammar.
+/// A deliberately small offline checker for teaching tasks. The rule and the
+/// hint come from the segment's writing task in the course JSON; it
+/// checks only the essential information and never claims to grade
+/// pronunciation or nuanced grammar.
 class WritingFeedback {
   const WritingFeedback._();
 
-  static String _normalize(String input) => input
-      .toLowerCase()
-      .replaceAll('’', "'")
-      .replaceAll('‘', "'")
-      .replaceAll(RegExp(r'\s+'), ' ')
-      .trim();
-
-  static WritingCheckResult check(
-    String lessonId,
-    String input, {
-    String? segmentId,
-  }) {
-    final text = _normalize(input);
-    final words = RegExp(
-      r"[a-z]+(?:'[a-z]+)?",
-    ).allMatches(text).map((match) => match.group(0)!).toSet();
-    bool has(String word) => words.contains(_normalize(word));
-
-    bool hasPhrase(String phrase) => text.contains(_normalize(phrase));
-
-    bool hasAny(Iterable<String> choices) => choices.any(has);
-    final hasIntroduction =
-        hasPhrase("i'm") || hasPhrase('i am') || hasPhrase('my name is');
-    final hasItIs = hasPhrase("it's") || hasPhrase('it is');
-
-    final complete = switch (segmentId) {
-      'a0-04-a' => hasAll(words, ['zero', 'one', 'two', 'three']),
-      'a0-04-b' => hasAll(words, ['six', 'seven', 'eight']),
-      'a0-04-c' =>
-        RegExp(
-              r'\b(one|two|three|four|five|six|seven|eight|nine|zero)\b',
-            ).allMatches(text).length >=
-            3,
-      'a0-08-a' => hasItIs && hasAny(['monday', 'tuesday', 'wednesday']),
-      'a0-08-b' =>
-        hasItIs && hasAny(['thursday', 'friday', 'saturday', 'sunday']),
-      'a0-08-c' => hasItIs && (has('oclock') || hasPhrase("o'clock")),
-      _ => switch (lessonId) {
-        'a0-01' => hasAny(['hello', 'hi']) && hasIntroduction,
-        'a0-02' =>
-          (hasPhrase('my name') || hasIntroduction) &&
-              RegExp(r'[a-z](?:[ -]?[a-z]){2,}').hasMatch(text),
-        'a0-03' => hasIntroduction && hasAny(['good', 'okay', 'tired']),
-        'a0-04' =>
-          RegExp(
-                r'\b(zero|one|two|three|four|five|six|seven|eight|nine|ten)\b',
-              ).allMatches(text).length >=
-              3,
-        'a0-05' => hasItIs && hasAny(['book', 'pen', 'bag', 'key']),
-        'a0-06' => hasIntroduction && has('from') && words.length >= 3,
-        'a0-07' =>
-          hasPhrase('this is my') &&
-              hasAny(['mother', 'father', 'sister', 'brother', 'friend']),
-        'a0-08' =>
-          hasItIs &&
-              (hasAny([
-                    'monday',
-                    'tuesday',
-                    'wednesday',
-                    'thursday',
-                    'friday',
-                    'saturday',
-                    'sunday',
-                  ]) ||
-                  has('clock')),
-        'a0-09' => hasIntroduction && has('like') && words.length >= 3,
-        'a0-10' =>
-          hasIntroduction && has('from') && has('like') && has('water'),
-        _ => words.length >= 2,
-      },
-    };
-
+  static WritingCheckResult check(String segmentId, String input) {
+    final activity = activityBySegmentId(segmentId);
+    final rule = activity.writingRequiredTerms;
+    final complete = rule.isEmpty
+        ? RegExp(r"[a-z]+(?:'[a-z]+)?")
+                  .allMatches(normalizeAnswer(input))
+                  .map((match) => match.group(0))
+                  .toSet()
+                  .length >=
+              2
+        : matchesRule(input, rule);
     if (complete) {
       return const WritingCheckResult(
         complete: true,
@@ -91,30 +33,9 @@ class WritingFeedback {
     }
     return WritingCheckResult(
       complete: false,
-      message: _hintFor(segmentId ?? lessonId),
+      message: activity.writingHint.isNotEmpty
+          ? activity.writingHint
+          : '再补充一个完整英文句子。',
     );
   }
-
-  static bool hasAll(Set<String> words, Iterable<String> required) =>
-      required.every(words.contains);
-
-  static String _hintFor(String lessonId) => switch (lessonId) {
-    'a0-04-a' => '请写出 zero、one、two、three 四个数字。',
-    'a0-04-b' => '请写出 six、seven、eight 三个数字。',
-    'a0-04-c' => '用英文一个一个写出三个数字，例如 one-three-nine。',
-    'a0-08-a' => '用 It is / It’s 加 Monday、Tuesday 或 Wednesday。',
-    'a0-08-b' => '用 It is / It’s 加 Thursday、Friday、Saturday 或 Sunday。',
-    'a0-08-c' => '用 It is / It’s 加数字和 o’clock，例如 It’s three o’clock。',
-    'a0-01' => '试着同时写一句问候和姓名，例如：Hello. I’m …',
-    'a0-02' => '写出姓名并拼写一遍，例如 My name is Shen. S-H-E-N.',
-    'a0-03' => '用 I’m / I am 加上你的状态，例如 good 或 tired。',
-    'a0-04' => '用英文写出三个数字，例如 one-three-nine。',
-    'a0-05' => '用 It’s / It is 加一个物品，例如 a pen。',
-    'a0-06' => '用 I’m from … 写成一个完整句子。',
-    'a0-07' => '用 This is my … 介绍一位家人或朋友。',
-    'a0-08' => '用 It’s … 写一个星期或整点时间。',
-    'a0-09' => '用 I like … 写出一种喜好。',
-    'a0-10' => '分别写姓名、来自哪里和喜好三部分，喜好用 water：I like water.',
-    _ => '再补充一个完整英文句子。',
-  };
 }