feat: Enhance SAR message handling with improved parsing and object marker generation

.claude/settings.local.json

@@ -15,7 +15,9 @@
       "Bash(nc:*)",
       "Bash(pkill:*)",
       "WebFetch(domain:github.com)",
-      "WebFetch(domain:raw.githubusercontent.com)"
+      "WebFetch(domain:raw.githubusercontent.com)",
+      "Bash(dart run:*)",
+      "Bash(dart test_sar_debug.dart:*)"
     ],
     "deny": [],
     "ask": []

CLAUDE.md

@@ -2,6 +2,16 @@
 
 This document provides technical details for AI assistants (like Claude) working with this codebase.
 
+## ⚠️ IMPORTANT: Flutter Development Rules
+
+**NEVER run or kill Flutter processes:**
+- **DO NOT** execute `flutter run` command
+- **DO NOT** kill Flutter processes (e.g., `pkill flutter`, `killall flutter`)
+- The user manages the Flutter development server themselves
+- Only make code changes and let the user trigger hot reload manually
+
+**Hot reload happens automatically when you save files** - the user has their own Flutter process running and will see changes instantly.
+
 ## Project Overview
 
 **Type**: Flutter Mobile Application

lib/providers/messages_provider.dart

@@ -2,6 +2,7 @@ import 'package:flutter/foundation.dart';
 import '../models/message.dart';
 import '../models/sar_marker.dart';
 import '../services/message_storage_service.dart';
+import '../utils/sar_message_parser.dart';
 
 /// Messages Provider - manages message history and SAR markers
 class MessagesProvider with ChangeNotifier {
@@ -45,13 +46,16 @@ class MessagesProvider with ChangeNotifier {
       print('📦 [MessagesProvider] Loading persisted messages...');
       final storedMessages = await _storageService.loadMessages();
 
-      // Add stored messages
+      // Add stored messages with enhancement to ensure SAR detection
-      _messages.addAll(storedMessages);
-
-      // Extract SAR markers from stored messages
       for (final message in storedMessages) {
-        if (message.isSarMarker) {
+        // Re-enhance each message to ensure SAR markers are properly detected
-          final marker = message.toSarMarker();
+        // This handles cases where messages were stored before enhancement logic
+        final enhancedMessage = SarMessageParser.enhanceMessage(message);
+        _messages.add(enhancedMessage);
+
+        // Extract SAR markers
+        if (enhancedMessage.isSarMarker) {
+          final marker = enhancedMessage.toSarMarker();
           if (marker != null) {
             _sarMarkers[marker.id] = marker;
           }
@@ -69,11 +73,21 @@ class MessagesProvider with ChangeNotifier {
 
   /// Add a message
   void addMessage(Message message) {
-    _messages.add(message);
+    // Always enhance message with SAR parser to detect SAR markers
+    final enhancedMessage = SarMessageParser.enhanceMessage(message);
+
+    // Debug: Check if message is SAR
+    if (message.text.startsWith('S:')) {
+      print('🔍 [MessagesProvider] Processing SAR message: ${message.text}');
+      print('   isSarMarker: ${enhancedMessage.isSarMarker}');
+      print('   sarMarkerType: ${enhancedMessage.sarMarkerType}');
+    }
+
+    _messages.add(enhancedMessage);
 
     // If it's a SAR marker message, extract and store the marker
-    if (message.isSarMarker) {
+    if (enhancedMessage.isSarMarker) {
-      final marker = message.toSarMarker();
+      final marker = enhancedMessage.toSarMarker();
       if (marker != null) {
         _sarMarkers[marker.id] = marker;
       }
@@ -88,10 +102,12 @@ class MessagesProvider with ChangeNotifier {
   /// Add multiple messages
   void addMessages(List<Message> messages) {
     for (final message in messages) {
-      _messages.add(message);
+      // Always enhance message with SAR parser to detect SAR markers
+      final enhancedMessage = SarMessageParser.enhanceMessage(message);
+      _messages.add(enhancedMessage);
 
-      if (message.isSarMarker) {
+      if (enhancedMessage.isSarMarker) {
-        final marker = message.toSarMarker();
+        final marker = enhancedMessage.toSarMarker();
         if (marker != null) {
           _sarMarkers[marker.id] = marker;
         }

lib/screens/messages_tab.dart

@@ -572,23 +572,41 @@ class _MessageBubble extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final isSarMarker = message.isSarMarker;
+    final isDarkMode = Theme.of(context).brightness == Brightness.dark;
+
+    // Debug: Log message details
+    if (message.text.startsWith('S:')) {
+      debugPrint('🎨 [MessageBubble] Rendering SAR message:');
+      debugPrint('   Text: ${message.text}');
+      debugPrint('   isSarMarker: $isSarMarker');
+      debugPrint('   sarMarkerType: ${message.sarMarkerType}');
+    }
 
     return GestureDetector(
       onTap: onTap,
       child: Container(
-        margin: const EdgeInsets.only(bottom: 8),
+        margin: const EdgeInsets.only(bottom: 12),
-        padding: const EdgeInsets.all(12),
+        padding: const EdgeInsets.all(16),
         decoration: BoxDecoration(
           color: isSarMarker
-              ? _getSarMarkerColor(context)
+              ? _getSarMarkerColor(context, isDarkMode)
               : Theme.of(context).colorScheme.surfaceVariant,
-          borderRadius: BorderRadius.circular(12),
+          borderRadius: BorderRadius.circular(16),
           border: isSarMarker
               ? Border.all(
-                  color: Theme.of(context).colorScheme.primary,
+                  color: _getSarMarkerBorderColor(context, isDarkMode),
-                  width: 2,
+                  width: 3,
                 )
               : null,
+          boxShadow: isSarMarker
+              ? [
+                  BoxShadow(
+                    color: _getSarMarkerBorderColor(context, isDarkMode).withValues(alpha: 0.3),
+                    blurRadius: 8,
+                    offset: const Offset(0, 2),
+                  ),
+                ]
+              : null,
         ),
         child: Column(
           crossAxisAlignment: CrossAxisAlignment.start,
@@ -596,46 +614,61 @@ class _MessageBubble extends StatelessWidget {
             // Header: Sender and time
             Row(
               children: [
-                if (message.isChannelMessage)
-                  const Icon(Icons.tag, size: 16)
-                else
-                  const Icon(Icons.person, size: 16),
-                const SizedBox(width: 4),
-                Text(
-                  message.displaySender,
-                  style: Theme.of(context).textTheme.labelMedium?.copyWith(
-                        fontWeight: FontWeight.bold,
-                      ),
-                ),
-                const Spacer(),
                 if (isSarMarker)
                   Container(
                     padding: const EdgeInsets.symmetric(
-                      horizontal: 6,
+                      horizontal: 10,
-                      vertical: 2,
+                      vertical: 4,
                     ),
                     decoration: BoxDecoration(
-                      color: Theme.of(context).colorScheme.primary,
+                      color: _getSarMarkerBorderColor(context, isDarkMode),
-                      borderRadius: BorderRadius.circular(4),
+                      borderRadius: BorderRadius.circular(6),
                     ),
-                    child: Text(
+                    child: Row(
-                      'SAR',
+                      mainAxisSize: MainAxisSize.min,
-                      style: Theme.of(context).textTheme.labelSmall?.copyWith(
+                      children: [
-                            color: Theme.of(context).colorScheme.onPrimary,
+                        const Icon(
-                            fontWeight: FontWeight.bold,
+                          Icons.warning_amber_rounded,
-                          ),
+                          size: 16,
+                          color: Colors.white,
+                        ),
+                        const SizedBox(width: 4),
+                        Text(
+                          'SAR ALERT',
+                          style: Theme.of(context).textTheme.labelSmall?.copyWith(
+                                color: Colors.white,
+                                fontWeight: FontWeight.bold,
+                                letterSpacing: 0.5,
+                              ),
+                        ),
+                      ],
                     ),
+                  )
+                else ...[
+                  if (message.isChannelMessage)
+                    const Icon(Icons.tag, size: 16)
+                  else
+                    const Icon(Icons.person, size: 16),
+                  const SizedBox(width: 4),
+                  Text(
+                    message.displaySender,
+                    style: Theme.of(context).textTheme.labelMedium?.copyWith(
+                          fontWeight: FontWeight.bold,
+                        ),
                   ),
-                const SizedBox(width: 8),
+                ],
+                const Spacer(),
                 Text(
                   message.timeAgo,
-                  style: Theme.of(context).textTheme.labelSmall,
+                  style: Theme.of(context).textTheme.labelSmall?.copyWith(
+                        fontWeight: isSarMarker ? FontWeight.w600 : FontWeight.normal,
+                      ),
                 ),
               ],
             ),
-            const SizedBox(height: 8),
+            const SizedBox(height: 12),
 
-            // SAR marker content
+            // SAR marker content (simplified design matching message history)
             if (isSarMarker && message.sarMarkerType != null) ...[
               Row(
                 children: [
@@ -650,15 +683,16 @@ class _MessageBubble extends StatelessWidget {
                       children: [
                         Text(
                           message.sarMarkerType!.displayName,
-                          style:
+                          style: Theme.of(context).textTheme.titleMedium?.copyWith(
-                              Theme.of(context).textTheme.titleMedium?.copyWith(
+                                fontWeight: FontWeight.bold,
-                                    fontWeight: FontWeight.bold,
+                              ),
-                                  ),
                         ),
                         if (message.sarGpsCoordinates != null)
                           Text(
                             '${message.sarGpsCoordinates!.latitude.toStringAsFixed(5)}, ${message.sarGpsCoordinates!.longitude.toStringAsFixed(5)}',
-                            style: Theme.of(context).textTheme.bodySmall,
+                            style: Theme.of(context).textTheme.bodySmall?.copyWith(
+                                  fontFamily: 'monospace',
+                                ),
                           ),
                       ],
                     ),
@@ -690,8 +724,88 @@ class _MessageBubble extends StatelessWidget {
     );
   }
 
-  Color _getSarMarkerColor(BuildContext context) {
+  Color _getSarMarkerColor(BuildContext context, bool isDarkMode) {
-    return Theme.of(context).colorScheme.primaryContainer;
+    if (message.sarMarkerType == null) {
+      return Theme.of(context).colorScheme.primaryContainer;
+    }
+
+    // Use type-specific colors with alpha for background
+    switch (message.sarMarkerType!) {
+      case SarMarkerType.foundPerson:
+        return isDarkMode
+            ? const Color(0xFF1B5E20).withValues(alpha: 0.4)  // Dark green
+            : const Color(0xFFC8E6C9).withValues(alpha: 0.9);  // Light green
+      case SarMarkerType.fire:
+        return isDarkMode
+            ? const Color(0xFFB71C1C).withValues(alpha: 0.4)  // Dark red
+            : const Color(0xFFFFCDD2).withValues(alpha: 0.9);  // Light red
+      case SarMarkerType.stagingArea:
+        return isDarkMode
+            ? const Color(0xFF0D47A1).withValues(alpha: 0.4)  // Dark blue
+            : const Color(0xFFBBDEFB).withValues(alpha: 0.9);  // Light blue
+      case SarMarkerType.object:
+        return isDarkMode
+            ? const Color(0xFF4A148C).withValues(alpha: 0.4)  // Dark purple
+            : const Color(0xFFE1BEE7).withValues(alpha: 0.9);  // Light purple
+      case SarMarkerType.unknown:
+        return isDarkMode
+            ? const Color(0xFF424242).withValues(alpha: 0.4)  // Dark gray
+            : const Color(0xFFEEEEEE).withValues(alpha: 0.9);  // Light gray
+    }
+  }
+
+  Color _getSarMarkerBorderColor(BuildContext context, bool isDarkMode) {
+    if (message.sarMarkerType == null) {
+      return Theme.of(context).colorScheme.primary;
+    }
+
+    // Use vibrant type-specific colors for borders
+    switch (message.sarMarkerType!) {
+      case SarMarkerType.foundPerson:
+        return const Color(0xFF4CAF50);  // Green
+      case SarMarkerType.fire:
+        return const Color(0xFFF44336);  // Red
+      case SarMarkerType.stagingArea:
+        return const Color(0xFF2196F3);  // Blue
+      case SarMarkerType.object:
+        return const Color(0xFF9C27B0);  // Purple
+      case SarMarkerType.unknown:
+        return const Color(0xFF9E9E9E);  // Gray
+    }
+  }
+
+  /// Extract notes from SAR message text
+  /// Returns text after the SAR marker format, or null if none
+  String? _extractNotesFromMessage(String text) {
+    final trimmed = text.trim();
+    if (!trimmed.startsWith('S:')) return null;
+
+    // Extract first line
+    final firstLine = trimmed.split('\n').first;
+
+    // Find the end of coordinates (after second colon and comma-separated numbers)
+    final pattern = RegExp(r'^S:.:(-?\d+\.?\d*),(-?\d+\.?\d*)');
+    final match = pattern.firstMatch(firstLine);
+    if (match == null) return null;
+
+    // Extract notes from same line
+    String? notes;
+    if (match.end < firstLine.length) {
+      notes = firstLine.substring(match.end).trim();
+    }
+
+    // Check for multi-line notes
+    final lines = trimmed.split('\n');
+    if (lines.length > 1) {
+      final additionalNotes = lines.sublist(1).join('\n').trim();
+      if (additionalNotes.isNotEmpty) {
+        notes = notes != null && notes.isNotEmpty
+            ? '$notes\n$additionalNotes'
+            : additionalNotes;
+      }
+    }
+
+    return notes != null && notes.isNotEmpty ? notes : null;
   }
 }
 

lib/screens/settings_screen.dart

@@ -134,9 +134,11 @@ class _SettingsScreenState extends State<SettingsScreen> {
         foundPersonCount: 2,
         fireCount: 1,
         stagingCount: 1,
+        objectCount: 1,
       );
 
       final channelMessages = SampleDataGenerator.generateChannelMessages(
+        centerLocation: centerLocation,
         generalChannelMessages: 8,
         emergencyChannelMessages: 5,
       );

lib/utils/sample_data_generator.dart

@@ -117,6 +117,7 @@ class SampleDataGenerator {
     int foundPersonCount = 2,
     int fireCount = 1,
     int stagingCount = 1,
+    int objectCount = 1,
   }) {
     final messages = <Message>[];
     final now = DateTime.now();
@@ -209,14 +210,53 @@ class SampleDataGenerator {
       messageId++;
     }
 
+    // Generate object markers
+    for (int i = 0; i < objectCount; i++) {
+      final latOffset = (_random.nextDouble() - 0.5) * 0.015;
+      final lonOffset = (_random.nextDouble() - 0.5) * 0.015;
+      final lat = centerLocation.latitude + latOffset;
+      final lon = centerLocation.longitude + lonOffset;
+
+      final senderKey = Uint8List.fromList(
+        List.generate(32, (_) => _random.nextInt(256)),
+      );
+
+      final timestamp = now.subtract(Duration(minutes: 40 + i * 5));
+      final notes = [
+        ' Backpack found - blue color',
+        ' Vehicle abandoned - check for owner',
+        ' Camping equipment discovered',
+        ' Trail marker found off-path',
+      ];
+
+      messages.add(Message(
+        id: 'sample_object_$messageId',
+        messageType: MessageType.contact,
+        senderPublicKeyPrefix: senderKey.sublist(0, 6),
+        pathLen: 1,
+        textType: MessageTextType.plain,
+        senderTimestamp: timestamp.millisecondsSinceEpoch ~/ 1000,
+        text: 'S:📦:${lat.toStringAsFixed(4)},${lon.toStringAsFixed(4)}${notes[i % notes.length]}',
+        receivedAt: timestamp,
+        isSarMarker: true,
+        sarMarkerType: SarMarkerType.object,
+        sarGpsCoordinates: LatLng(lat, lon),
+        senderName: 'Sample Searcher',
+      ));
+      messageId++;
+    }
+
     return messages;
   }
 
   /// Generate sample channel messages for public channels
   static List<Message> generateChannelMessages({
+    LatLng? centerLocation,
     int generalChannelMessages = 8,
     int emergencyChannelMessages = 5,
   }) {
+    // Use provided location or default to Ljubljana, Slovenia
+    final center = centerLocation ?? const LatLng(46.0569, 14.5058);
     final messages = <Message>[];
     final now = DateTime.now();
     int messageId = 1000; // Start with high ID to avoid conflicts
@@ -238,16 +278,17 @@ class SampleDataGenerator {
     ];
 
     // Sample messages for Emergency channel (index 1)
+    // Mix regular messages and SAR markers
     final emergencyMessages = [
       'URGENT: Medical assistance needed at sector 4',
-      'Found person - requesting immediate evac',
+      'S:🧑:${center.latitude.toStringAsFixed(4)},${(center.longitude + 0.005).toStringAsFixed(4)} Adult male, conscious',
       'Fire spotted - coordinates incoming',
-      'Team member injured - sending location',
+      'S:🔥:${(center.latitude + 0.008).toStringAsFixed(4)},${(center.longitude + 0.003).toStringAsFixed(4)} Spreading rapidly!',
       'PRIORITY: Need helicopter support',
       'Medical team en route to your location',
       'Evac helicopter ETA 10 minutes',
       'Emergency resolved - all clear',
-      'Casualties: 1 minor injury, being treated',
+      'S:🏕️:${(center.latitude - 0.002).toStringAsFixed(4)},${(center.longitude - 0.004).toStringAsFixed(4)} Emergency staging area',
       'Emergency services notified and responding',
     ];
 

lib/utils/sar_message_parser.dart

@@ -9,14 +9,19 @@ import '../models/message.dart';
 ///   S:🔥:40.7128,-74.0060
 ///   S:🏕️:34.0522,-118.2437
 class SarMessageParser {
+  // Updated regex to allow optional notes after coordinates
+  // Captures: emoji (one or more non-colon chars), latitude, longitude
+  // Note: Emojis are multi-byte characters, so we use [^:]+ instead of .
   static final RegExp _sarPattern = RegExp(
-    r'^S:(.):(-?\d+\.?\d*),(-?\d+\.?\d*)$',
+    r'^S:([^:]+):(-?\d+\.?\d*),(-?\d+\.?\d*)',
     multiLine: false,
   );
 
   /// Check if a message is a SAR marker message
   static bool isSarMessage(String text) {
-    return text.trim().startsWith('S:') && _sarPattern.hasMatch(text.trim());
+    // Extract just the first line for matching
+    final firstLine = text.trim().split('\n').first;
+    return firstLine.startsWith('S:') && _sarPattern.hasMatch(firstLine);
   }
 
   /// Parse a SAR message and extract marker information
@@ -25,7 +30,9 @@ class SarMessageParser {
     final trimmed = text.trim();
     if (!trimmed.startsWith('S:')) return null;
 
-    final match = _sarPattern.firstMatch(trimmed);
+    // Extract first line (actual SAR marker)
+    final firstLine = trimmed.split('\n').first;
+    final match = _sarPattern.firstMatch(firstLine);
     if (match == null) return null;
 
     try {
@@ -40,10 +47,24 @@ class SarMessageParser {
       final markerType = SarMarkerType.fromEmoji(emoji);
       final location = LatLng(latitude, longitude);
 
+      // Extract notes if present (everything after coordinates on first line, or subsequent lines)
+      String? notes;
+      final coordsEnd = match.end;
+      if (coordsEnd < firstLine.length) {
+        // Notes on same line after coordinates
+        notes = firstLine.substring(coordsEnd).trim();
+      }
+      // Check for multi-line notes
+      final additionalNotes = extractNotes(text);
+      if (additionalNotes != null) {
+        notes = notes != null ? '$notes\n$additionalNotes' : additionalNotes;
+      }
+
       return SarMarkerInfo(
         type: markerType,
         location: location,
         emoji: emoji,
+        notes: notes,
       );
     } catch (e) {
       return null;
@@ -139,15 +160,17 @@ class SarMarkerInfo {
   final SarMarkerType type;
   final LatLng location;
   final String emoji;
+  final String? notes;
 
   SarMarkerInfo({
     required this.type,
     required this.location,
     required this.emoji,
+    this.notes,
   });
 
   @override
   String toString() {
-    return 'SarMarkerInfo(type: ${type.displayName}, location: $location)';
+    return 'SarMarkerInfo(type: ${type.displayName}, location: $location, notes: $notes)';
   }
 }