feat(post): recognize and parse blocked post

Closes #160

lib/i18n/en.i18n.json

@@ -578,6 +578,10 @@
       "title": "Only visible to the thread author",
       "detail(rich)": "This content only visible to $author",
       "detailAuthor": "author"
+    },
+    "blocked": {
+      "title": "Blocked content",
+      "detail": "This post has been blocked by administrator or moderator"
     }
   },
   "rateCard": {

lib/i18n/zh-CN.i18n.json

@@ -578,6 +578,10 @@
       "title": "仅对作者可见",
       "detail(rich)": "该部分内容仅对$author可见",
       "detailAuthor": "作者"
+    },
+    "blocked": {
+      "title": "内容被屏蔽",
+      "detail": "此楼层已被管理员或版主屏蔽"
     }
   },
   "rateCard": {

lib/i18n/zh-TW.i18n.json

@@ -578,6 +578,10 @@
       "title": "僅對作者可見",
       "detail(rich)": "該部分內容僅對$author可見",
       "detailAuthor": "作者"
+    },
+    "blocked": {
+      "title": "內容被屏蔽",
+      "detail": "此樓層已被管理員或版主封鎖"
     }
   },
   "rateCard": {

lib/shared/models/locked.dart

@@ -19,6 +19,8 @@ sealed class _LockedInfo extends Equatable {
 
   const factory _LockedInfo.author() = _LockedWithAuthor;
 
+  const factory _LockedInfo.banned() = _LockedWithBlocked;
+
   @override
   List<Object?> get props => [];
 }
@@ -75,6 +77,11 @@ final class _LockedWithAuthor extends _LockedInfo {
   const _LockedWithAuthor() : super._();
 }
 
+/// This section is blocked by admin or moderator.
+final class _LockedWithBlocked extends _LockedInfo {
+  const _LockedWithBlocked() : super._();
+}
+
 /// Describe a locked area in `Post`.
 ///
 /// Different types may be locked with different reasons:
@@ -122,6 +129,9 @@ class Locked extends Equatable {
   /// Is it only visible to the author and forum moderator.
   bool get lockedWithAuthor => _info != null && _info is _LockedWithAuthor;
 
+  /// Is it blocked by moderator.
+  bool get lockedWithBlocked => _info != null && _info is _LockedWithBlocked;
+
   /// Get the tid of current locked model.
   String? get tid {
     if (_info == null) {
@@ -236,6 +246,10 @@ class Locked extends Equatable {
     final pid = match?.namedGroup('pid');
 
     if (tid == null || pid == null || price == null || purchasedCount == null) {
+      if (element.innerText.contains('该帖被管理员或版主屏蔽')) {
+        return const _LockedInfo.banned();
+      }
+
       if (!allowWithPoints) {
         // Do not allow locked area that locked with points here.
         return null;
@@ -279,7 +293,9 @@ class Locked extends Equatable {
     if (_info is _LockedWithPurchase) {
       return _info.price > 0 && tid != null && pid != null;
     }
-    if (_info is _LockedWithPoints || _info is _LockedWithAuthor) {
+    if (_info is _LockedWithPoints ||
+        _info is _LockedWithAuthor ||
+        _info is _LockedWithBlocked) {
       return true;
     }
     return false;

lib/widgets/card/lock_card/locked_card.dart

@@ -216,6 +216,9 @@ class _LockedCardState extends State<LockedCard> {
           style: secondaryStyle,
         ),
       ]);
+    } else if (widget.locked.lockedWithBlocked) {
+      title = Text(tr.blocked.title, style: primaryStyle);
+      widgets.add(Text(tr.blocked.detail));
     } else {
       throw UnimplementedError(
         'Widget for card type of locked card not implemented',