Add Messages Filter feature

Adds ability to filter messages in chats:
- Hide messages from blocked senders in groups
- Hide mentions of blocked chats
- Filter Telegram/external links per-channel
- Manage filtered channels list
- Settings UI in Settings > Interface

Cherry-picked from PR TGX-Android#516 by Arseny271.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: japananimetime

app/src/main/java/org/thunderdog/challegram/component/chat/MessageView.java

@@ -630,6 +630,14 @@ public static Object fillMessageOptions (MessagesController m, TGMessage msg, @N
     boolean isSent = !msg.isNotSent();
     Object tag = null;
 
+    final boolean isHiddenByMessagesFilter = msg.isHiddenByMessagesFilter();
+
+    if (!isMore && (isHiddenByMessagesFilter /*|| BuildConfig.DEBUG*/)) {
+      ids.append(R.id.btn_messageChangeMessageFilterVisibility);
+      strings.append(Lang.getString(R.string.MessagesFilterShowMessage));
+      icons.append(R.drawable.baseline_visibility_24);
+    }
+
     // Promotion
 
     if (msg.isSponsoredMessage()) {
@@ -1551,7 +1559,7 @@ public boolean onTouchEvent (MotionEvent e) {
         } else {
           preventLongPress();
         }
-        if (c.inSelectMode() || !msg.onTouchEvent(this, e)) {
+        if (c.inSelectMode() || msg.isHiddenByMessagesFilter() || !msg.onTouchEvent(this, e)) {
           flags |= FLAG_CAUGHT_CLICK;
         } else {
           flags |= FLAG_CAUGHT_MESSAGE_TOUCH;

app/src/main/java/org/thunderdog/challegram/component/chat/filter/Content.java

@@ -0,0 +1,74 @@
+/*
+ * This file is a part of Telegram X
+ * Copyright © 2014 (tgx-android@pm.me)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * File created on 17/11/2023
+ */
+package org.thunderdog.challegram.component.chat.filter;
+
+import android.net.Uri;
+
+import org.drinkless.tdlib.TdApi;
+import org.thunderdog.challegram.data.TD;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import me.vkryl.td.ChatId;
+import me.vkryl.td.Td;
+
+class Content {
+  public final Set<String> mentionsUsername = new HashSet<>();
+  public final Set<Long> mentionsId = new HashSet<>();
+  public final Set<String> internalLinks = new HashSet<>();
+  public final Set<String> externalLinks = new HashSet<>();
+
+  public Content () {}
+
+  public void add (TdApi.MessageContent content) {
+    final TdApi.FormattedText textOrCaption = Td.textOrCaption(content);
+    if (textOrCaption == null || textOrCaption.text == null) return;
+
+    if (textOrCaption.entities != null) {
+      for (TdApi.TextEntity entity : textOrCaption.entities) {
+        switch (entity.type.getConstructor()) {
+          case TdApi.TextEntityTypeMention.CONSTRUCTOR: {
+            mentionsUsername.add(Td.substring(textOrCaption.text, entity));
+            break;
+          }
+          case TdApi.TextEntityTypeMentionName.CONSTRUCTOR: {
+            mentionsId.add(ChatId.fromUserId(((TdApi.TextEntityTypeMentionName) entity.type).userId));
+            break;
+          }
+          case TdApi.TextEntityTypeUrl.CONSTRUCTOR: {
+            addLink(Td.substring(textOrCaption.text, entity));
+            break;
+          }
+          case TdApi.TextEntityTypeTextUrl.CONSTRUCTOR: {
+            addLink(((TdApi.TextEntityTypeTextUrl) entity.type).url);
+            break;
+          }
+          default: {
+            break;
+          }
+        }
+      }
+    }
+  }
+
+  private void addLink (String link) {
+    if (TD.isTelegramOwnedHost(Uri.parse(link), false)) {
+      internalLinks.add(link);
+    } else {
+      externalLinks.add(link);
+    }
+  }
+}

app/src/main/java/org/thunderdog/challegram/component/chat/filter/FilterReason.java

@@ -0,0 +1,39 @@
+/*
+ * This file is a part of Telegram X
+ * Copyright © 2014 (tgx-android@pm.me)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * File created on 16/11/2023
+ */
+package org.thunderdog.challegram.component.chat.filter;
+
+import androidx.annotation.IntDef;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+@Retention(RetentionPolicy.SOURCE)
+@IntDef({
+  FilterReason.PENDING,
+  FilterReason.NONE,
+  FilterReason.BLOCKED_SENDER,
+  FilterReason.BLOCKED_SENDER_MENTION,
+  FilterReason.CONTAINS_INTERNAL_LINK,
+  FilterReason.CONTAINS_EXTERNAL_LINK
+})
+public @interface FilterReason {
+  int
+    PENDING = -1,
+    NONE = 0,
+    BLOCKED_SENDER = 1,
+    BLOCKED_SENDER_MENTION = 2,
+    CONTAINS_INTERNAL_LINK = 3,
+    CONTAINS_EXTERNAL_LINK = 4;
+}

app/src/main/java/org/thunderdog/challegram/component/chat/filter/FilterState.java

@@ -0,0 +1,35 @@
+/*
+ * This file is a part of Telegram X
+ * Copyright © 2014 (tgx-android@pm.me)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * File created on 16/11/2023
+ */
+package org.thunderdog.challegram.component.chat.filter;
+
+import androidx.annotation.IntDef;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+@Retention(RetentionPolicy.SOURCE)
+@IntDef({
+  FilterState.VISIBLE,
+  FilterState.HIDDEN,
+  FilterState.LAST_STATE_VISIBLE,
+  FilterState.LAST_STATE_HIDDEN
+})
+public @interface FilterState {
+  int
+    VISIBLE = 0,
+    HIDDEN = 1,
+    LAST_STATE_VISIBLE = 2,
+    LAST_STATE_HIDDEN = 3;
+}