feat: add block management features and sync with system blocklist

dialer/android/app/src/main/kotlin/com/icing/dialer/activities/MainActivity.kt

@@ -9,7 +9,10 @@ import android.database.Cursor
 import android.os.Build
 import android.os.Bundle
 import android.provider.CallLog
+import android.provider.BlockedNumberContract
 import android.telecom.TelecomManager
+import android.telephony.SubscriptionManager
+import android.telephony.SubscriptionInfo
 import android.util.Log
 import androidx.core.content.ContextCompat
 import com.icing.dialer.KeystoreHelper
@@ -23,6 +26,7 @@ class MainActivity : FlutterActivity() {
     private val KEYSTORE_CHANNEL = "com.example.keystore"
     private val CALLLOG_CHANNEL = "com.example.calllog"
     private val CALL_CHANNEL = "call_service"
+    private val BLOCK_CHANNEL = "com.example.block"
     private val TAG = "MainActivity"
     private val REQUEST_CODE_SET_DEFAULT_DIALER = 1001
     private val REQUEST_CODE_CALL_LOG_PERMISSION = 1002
@@ -240,6 +244,44 @@ class MainActivity : FlutterActivity() {
                     result.notImplemented()
                 }
             }
+
+        MethodChannel(flutterEngine.dartExecutor.binaryMessenger, BLOCK_CHANNEL)
+            .setMethodCallHandler { call, result ->
+                when (call.method) {
+                    "getBlockedNumbers" -> {
+                        val blockedNumbers = getSystemBlockedNumbers()
+                        result.success(blockedNumbers)
+                    }
+                    "blockNumber" -> {
+                        val number = call.argument<String>("number")
+                        if (number != null) {
+                            val success = blockNumberInSystem(number)
+                            result.success(success)
+                        } else {
+                            result.error("INVALID_ARGUMENT", "Number is required", null)
+                        }
+                    }
+                    "unblockNumber" -> {
+                        val number = call.argument<String>("number")
+                        if (number != null) {
+                            val success = unblockNumberFromSystem(number)
+                            result.success(success)
+                        } else {
+                            result.error("INVALID_ARGUMENT", "Number is required", null)
+                        }
+                    }
+                    "isNumberBlocked" -> {
+                        val number = call.argument<String>("number")
+                        if (number != null) {
+                            val isBlocked = isNumberBlockedInSystem(number)
+                            result.success(isBlocked)
+                        } else {
+                            result.error("INVALID_ARGUMENT", "Number is required", null)
+                        }
+                    }
+                    else -> result.notImplemented()
+                }
+            }
     }
 
     private fun isDefaultDialer(): Boolean {
@@ -354,4 +396,111 @@ class MainActivity : FlutterActivity() {
             }
         }
     }
+
+    // Block management methods
+    private fun getSystemBlockedNumbers(): List<String> {
+        val blockedNumbers = mutableListOf<String>()
+        
+        try {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                if (BlockedNumberContract.canCurrentUserBlockNumbers(this)) {
+                    val cursor = contentResolver.query(
+                        BlockedNumberContract.BlockedNumbers.CONTENT_URI,
+                        arrayOf(BlockedNumberContract.BlockedNumbers.COLUMN_ORIGINAL_NUMBER),
+                        null,
+                        null,
+                        null
+                    )
+                    
+                    cursor?.use {
+                        while (it.moveToNext()) {
+                            val number = it.getString(0)
+                            if (number != null) {
+                                blockedNumbers.add(number)
+                            }
+                        }
+                    }
+                }
+            }
+        } catch (e: Exception) {
+            Log.w(TAG, "Failed to get system blocked numbers: ${e.message}")
+        }
+        
+        return blockedNumbers
+    }
+
+    private fun blockNumberInSystem(number: String): Boolean {
+        return try {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                if (BlockedNumberContract.canCurrentUserBlockNumbers(this)) {
+                    val values = android.content.ContentValues().apply {
+                        put(BlockedNumberContract.BlockedNumbers.COLUMN_ORIGINAL_NUMBER, number)
+                    }
+                    val uri = contentResolver.insert(BlockedNumberContract.BlockedNumbers.CONTENT_URI, values)
+                    uri != null
+                } else {
+                    Log.w(TAG, "Current user cannot block numbers")
+                    false
+                }
+            } else {
+                Log.w(TAG, "Block numbers API not available on this Android version")
+                false
+            }
+        } catch (e: Exception) {
+            Log.w(TAG, "Failed to block number $number: ${e.message}")
+            false
+        }
+    }
+
+    private fun unblockNumberFromSystem(number: String): Boolean {
+        return try {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                if (BlockedNumberContract.canCurrentUserBlockNumbers(this)) {
+                    val deletedRows = contentResolver.delete(
+                        BlockedNumberContract.BlockedNumbers.CONTENT_URI,
+                        "${BlockedNumberContract.BlockedNumbers.COLUMN_ORIGINAL_NUMBER} = ?",
+                        arrayOf(number)
+                    )
+                    deletedRows > 0
+                } else {
+                    Log.w(TAG, "Current user cannot unblock numbers")
+                    false
+                }
+            } else {
+                Log.w(TAG, "Block numbers API not available on this Android version")
+                false
+            }
+        } catch (e: Exception) {
+            Log.w(TAG, "Failed to unblock number $number: ${e.message}")
+            false
+        }
+    }
+
+    private fun isNumberBlockedInSystem(number: String): Boolean {
+        return try {
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+                if (BlockedNumberContract.canCurrentUserBlockNumbers(this)) {
+                    val cursor = contentResolver.query(
+                        BlockedNumberContract.BlockedNumbers.CONTENT_URI,
+                        arrayOf(BlockedNumberContract.BlockedNumbers.COLUMN_ORIGINAL_NUMBER),
+                        "${BlockedNumberContract.BlockedNumbers.COLUMN_ORIGINAL_NUMBER} = ?",
+                        arrayOf(number),
+                        null
+                    )
+                    
+                    cursor?.use {
+                        return it.count > 0
+                    }
+                    false
+                } else {
+                    false
+                }
+            } else {
+                false
+            }
+        } catch (e: Exception) {
+            Log.w(TAG, "Failed to check if number $number is blocked: ${e.message}")
+            false
+        }
+    }
 }

dialer/lib/domain/services/block_service.dart

@@ -1,9 +1,11 @@
 import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
 /// Service for managing blocked phone numbers
 class BlockService {
   static const String _blockedNumbersKey = 'blocked_numbers';
+  static const MethodChannel _channel = MethodChannel('com.example.block');
 
   // Private constructor
   BlockService._privateConstructor();
@@ -16,46 +18,71 @@ class BlockService {
     return _instance;
   }
 
-  /// Block a phone number
+  /// Block a phone number (syncs with system and app)
   Future<bool> blockNumber(String phoneNumber) async {
     try {
+      // First try to block in system
+      try {
+        await _channel.invokeMethod('blockNumber', {'number': phoneNumber});
+      } catch (e) {
+        debugPrint('Failed to block in system: $e');
+      }
+
+      // Always save to app storage as backup
       final prefs = await SharedPreferences.getInstance();
       final blockedNumbers = prefs.getStringList(_blockedNumbersKey) ?? [];
 
       // Don't add if already blocked
-      if (blockedNumbers.contains(phoneNumber)) {
-        return true;
+      if (!blockedNumbers.contains(phoneNumber)) {
+        blockedNumbers.add(phoneNumber);
+        await prefs.setStringList(_blockedNumbersKey, blockedNumbers);
       }
 
-      blockedNumbers.add(phoneNumber);
-      return await prefs.setStringList(_blockedNumbersKey, blockedNumbers);
+      return true; // Return true if either system or app blocking succeeded
     } catch (e) {
       debugPrint('Error blocking number: $e');
       return false;
     }
   }
 
-  /// Unblock a phone number
+  /// Unblock a phone number (syncs with system and app)
   Future<bool> unblockNumber(String phoneNumber) async {
     try {
+      // First try to unblock from system
+      try {
+        await _channel.invokeMethod('unblockNumber', {'number': phoneNumber});
+      } catch (e) {
+        debugPrint('Failed to unblock from system: $e');
+      }
+
+      // Always remove from app storage
       final prefs = await SharedPreferences.getInstance();
       final blockedNumbers = prefs.getStringList(_blockedNumbersKey) ?? [];
 
-      if (!blockedNumbers.contains(phoneNumber)) {
-        return true;
+      if (blockedNumbers.contains(phoneNumber)) {
+        blockedNumbers.remove(phoneNumber);
+        await prefs.setStringList(_blockedNumbersKey, blockedNumbers);
       }
 
-      blockedNumbers.remove(phoneNumber);
-      return await prefs.setStringList(_blockedNumbersKey, blockedNumbers);
+      return true;
     } catch (e) {
       debugPrint('Error unblocking number: $e');
       return false;
     }
   }
 
-  /// Check if a number is blocked
+  /// Check if a number is blocked (checks both system and app)
   Future<bool> isNumberBlocked(String phoneNumber) async {
     try {
+      // Check system first
+      try {
+        bool systemBlocked = await _channel.invokeMethod('isNumberBlocked', {'number': phoneNumber});
+        if (systemBlocked) return true;
+      } catch (e) {
+        debugPrint('Failed to check system blocked status: $e');
+      }
+
+      // Check app storage as fallback
       final prefs = await SharedPreferences.getInstance();
       final blockedNumbers = prefs.getStringList(_blockedNumbersKey) ?? [];
       return blockedNumbers.contains(phoneNumber);
@@ -65,14 +92,61 @@ class BlockService {
     }
   }
 
-  /// Get all blocked numbers
+  /// Get all blocked numbers (merges system and app blocked numbers)
   Future<List<String>> getBlockedNumbers() async {
     try {
-      final prefs = await SharedPreferences.getInstance();
-      return prefs.getStringList(_blockedNumbersKey) ?? [];
+      Set<String> allBlockedNumbers = {};
+
+      // Get system blocked numbers
+      try {
+        List<dynamic> systemBlocked = await _channel.invokeMethod('getBlockedNumbers');
+        allBlockedNumbers.addAll(systemBlocked.cast<String>());
+      } catch (e) {
+        debugPrint('Failed to get system blocked numbers: $e');
+      }
+
+      // Get app blocked numbers
+      try {
+        final prefs = await SharedPreferences.getInstance();
+        final appBlocked = prefs.getStringList(_blockedNumbersKey) ?? [];
+        allBlockedNumbers.addAll(appBlocked);
+      } catch (e) {
+        debugPrint('Failed to get app blocked numbers: $e');
+      }
+
+      return allBlockedNumbers.toList()..sort();
     } catch (e) {
       debugPrint('Error getting blocked numbers: $e');
       return [];
     }
   }
+
+  /// Sync app blocked numbers with system blocked numbers
+  Future<void> syncWithSystem() async {
+    try {
+      // Get system blocked numbers
+      List<String> systemBlocked = [];
+      try {
+        List<dynamic> result = await _channel.invokeMethod('getBlockedNumbers');
+        systemBlocked = result.cast<String>();
+      } catch (e) {
+        debugPrint('Failed to get system blocked numbers for sync: $e');
+        return;
+      }
+
+      // Get app blocked numbers
+      final prefs = await SharedPreferences.getInstance();
+      List<String> appBlocked = prefs.getStringList(_blockedNumbersKey) ?? [];
+
+      // Merge them (system takes precedence)
+      Set<String> mergedBlocked = {...systemBlocked, ...appBlocked};
+
+      // Update app storage with merged list
+      await prefs.setStringList(_blockedNumbersKey, mergedBlocked.toList());
+
+      debugPrint('Synced ${mergedBlocked.length} blocked numbers with system');
+    } catch (e) {
+      debugPrint('Error syncing with system: $e');
+    }
+  }
 }

dialer/lib/presentation/features/settings/blocked/settings_blocked.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:shared_preferences/shared_preferences.dart';
+import '../../../../domain/services/block_service.dart';
 
 class BlockedNumbersPage extends StatefulWidget {
   const BlockedNumbersPage({super.key});
@@ -12,6 +13,8 @@ class _BlockedNumbersPageState extends State<BlockedNumbersPage> {
   bool _blockUnknownNumbers = false; // Toggle for blocking unknown numbers
   List<String> _blockedNumbers = []; // List of blocked numbers
   final TextEditingController _numberController = TextEditingController();
+  final BlockService _blockService = BlockService();
+  bool _isLoading = true;
 
   @override
   void initState() {
@@ -19,13 +22,33 @@ class _BlockedNumbersPageState extends State<BlockedNumbersPage> {
     _loadPreferences(); // Load data on initialization
   }
 
-  // Load preferences from local storage
+  // Load preferences from local storage and sync with system
   Future<void> _loadPreferences() async {
-    final prefs = await SharedPreferences.getInstance();
     setState(() {
-      _blockUnknownNumbers = prefs.getBool('blockUnknownNumbers') ?? false;
-      _blockedNumbers = prefs.getStringList('blockedNumbers') ?? [];
+      _isLoading = true;
     });
+
+    try {
+      final prefs = await SharedPreferences.getInstance();
+      final blockUnknownNumbers = prefs.getBool('blockUnknownNumbers') ?? false;
+      
+      // Sync with system blocked numbers
+      await _blockService.syncWithSystem();
+      
+      // Get all blocked numbers (merged from system and app)
+      final blockedNumbers = await _blockService.getBlockedNumbers();
+      
+      setState(() {
+        _blockUnknownNumbers = blockUnknownNumbers;
+        _blockedNumbers = blockedNumbers;
+        _isLoading = false;
+      });
+    } catch (e) {
+      debugPrint('Error loading preferences: $e');
+      setState(() {
+        _isLoading = false;
+      });
+    }
   }
 
   // Save preferences to local storage
@@ -41,84 +64,121 @@ class _BlockedNumbersPageState extends State<BlockedNumbersPage> {
       backgroundColor: Colors.black,
       appBar: AppBar(
         title: const Text('Blocked Numbers'),
-      ),
-      body: ListView(
-        padding: const EdgeInsets.all(16),
-        children: [
-          SwitchListTile(
-            title: const Text(
-              'Block Unknown Numbers',
-              style: TextStyle(color: Colors.white),
-            ),
-            value: _blockUnknownNumbers,
-            onChanged: (bool value) {
-              setState(() {
-                _blockUnknownNumbers = value;
-                _savePreferences(); // Save the state to local storage
-              });
+        actions: [
+          IconButton(
+            icon: const Icon(Icons.sync),
+            onPressed: _isLoading ? null : () async {
+              await _loadPreferences();
+              ScaffoldMessenger.of(context).showSnackBar(
+                const SnackBar(content: Text('Synced with system blocklist')),
+              );
             },
-          ),
-          const SizedBox(height: 16),
-          ListTile(
-            title: const Text(
-              'Blocked Numbers',
-              style: TextStyle(color: Colors.white, fontSize: 18, fontWeight: FontWeight.bold),
-            ),
-            subtitle: _blockedNumbers.isEmpty
-                ? const Text(
-                    'No blocked numbers',
-                    style: TextStyle(color: Colors.grey),
-                  )
-                : null,
-          ),
-          ..._blockedNumbers.map(
-            (number) => ListTile(
-              title: Text(
-                number,
-                style: const TextStyle(color: Colors.white),
-              ),
-              trailing: IconButton(
-                icon: const Icon(Icons.delete, color: Colors.red),
-                onPressed: () => _unblockNumber(number),
-              ),
-            ),
-          ),
-          const Divider(color: Colors.grey),
-          ListTile(
-            title: const Text(
-              'Block a Number',
-              style: TextStyle(color: Colors.white),
-            ),
-            trailing: const Icon(Icons.add, color: Colors.white),
-            onTap: () => _showBlockNumberDialog(),
+            tooltip: 'Sync with system blocklist',
           ),
         ],
       ),
+      body: _isLoading
+          ? const Center(child: CircularProgressIndicator())
+          : ListView(
+              padding: const EdgeInsets.all(16),
+              children: [
+                SwitchListTile(
+                  title: const Text(
+                    'Block Unknown Numbers',
+                    style: TextStyle(color: Colors.white),
+                  ),
+                  value: _blockUnknownNumbers,
+                  onChanged: (bool value) {
+                    setState(() {
+                      _blockUnknownNumbers = value;
+                      _savePreferences(); // Save the state to local storage
+                    });
+                  },
+                ),
+                const SizedBox(height: 16),
+                ListTile(
+                  title: const Text(
+                    'Blocked Numbers',
+                    style: TextStyle(color: Colors.white, fontSize: 18, fontWeight: FontWeight.bold),
+                  ),
+                  subtitle: _blockedNumbers.isEmpty
+                      ? const Text(
+                          'No blocked numbers',
+                          style: TextStyle(color: Colors.grey),
+                        )
+                      : Text(
+                          '${_blockedNumbers.length} numbers blocked (includes system blocklist)',
+                          style: const TextStyle(color: Colors.grey),
+                        ),
+                ),
+                ..._blockedNumbers.map(
+                  (number) => ListTile(
+                    title: Text(
+                      number,
+                      style: const TextStyle(color: Colors.white),
+                    ),
+                    trailing: IconButton(
+                      icon: const Icon(Icons.delete, color: Colors.red),
+                      onPressed: () => _unblockNumber(number),
+                    ),
+                  ),
+                ),
+                const Divider(color: Colors.grey),
+                ListTile(
+                  title: const Text(
+                    'Block a Number',
+                    style: TextStyle(color: Colors.white),
+                  ),
+                  trailing: const Icon(Icons.add, color: Colors.white),
+                  onTap: () => _showBlockNumberDialog(),
+                ),
+              ],
+            ),
     );
   }
 
   // Function to block a number
-  void _blockNumber(String number) {
+  void _blockNumber(String number) async {
     if (number.isNotEmpty && !_blockedNumbers.contains(number)) {
-      setState(() {
-        _blockedNumbers.add(number);
-        _savePreferences(); // Save the updated list
-      });
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text('$number has been blocked')),
-      );
+      try {
+        final success = await _blockService.blockNumber(number);
+        if (success) {
+          await _loadPreferences(); // Refresh the list
+          ScaffoldMessenger.of(context).showSnackBar(
+            SnackBar(content: Text('$number has been blocked')),
+          );
+        } else {
+          ScaffoldMessenger.of(context).showSnackBar(
+            SnackBar(content: Text('Failed to block $number')),
+          );
+        }
+      } catch (e) {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('Error blocking $number: $e')),
+        );
+      }
     }
   }
 
   // Function to unblock a number
-  void _unblockNumber(String number) {
-    setState(() {
-      _blockedNumbers.remove(number);
-      _savePreferences(); // Save the updated list
-    });
-    ScaffoldMessenger.of(context).showSnackBar(
-      SnackBar(content: Text('$number has been unblocked')),
-    );
+  void _unblockNumber(String number) async {
+    try {
+      final success = await _blockService.unblockNumber(number);
+      if (success) {
+        await _loadPreferences(); // Refresh the list
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('$number has been unblocked')),
+        );
+      } else {
+        ScaffoldMessenger.of(context).showSnackBar(
+          SnackBar(content: Text('Failed to unblock $number')),
+        );
+      }
+    } catch (e) {
+      ScaffoldMessenger.of(context).showSnackBar(
+        SnackBar(content: Text('Error unblocking $number: $e')),
+      );
+    }
   }
 
   // Dialog for blocking a new number