Replace chat search with voice filter recommendations

lib/features/mapflow/presentation/mapflow_shell.dart

@@ -125,12 +125,12 @@ class _MapContent extends StatelessWidget {
           SafeArea(
             child: Align(
               alignment: Alignment.topCenter,
-              child: _MapSearchButton(
-                query: state.searchQuery,
-                onSearch: placeCubit.searchPlaces,
-                onClear: state.searchQuery.isEmpty
+              child: _VoiceFilterButton(
+                transcript: state.voiceFilterTranscript,
+                onApply: placeCubit.recommendPlacesByVoice,
+                onClear: state.voiceFilterTranscript.isEmpty
                     ? null
-                    : placeCubit.clearSearch,
+                    : placeCubit.clearVoiceFilter,
               ),
             ),
           ),
@@ -334,21 +334,25 @@ class _AddReviewButton extends StatelessWidget {
   }
 }
 
-class _MapSearchButton extends StatelessWidget {
-  const _MapSearchButton({
-    required this.query,
-    required this.onSearch,
+class _VoiceFilterButton extends StatelessWidget {
+  const _VoiceFilterButton({
+    required this.transcript,
+    required this.onApply,
     required this.onClear,
   });
 
-  final String query;
-  final Future<void> Function(String) onSearch;
+  final String transcript;
+  final Future<void> Function({
+    required String audioContentBase64,
+    required String audioMimeType,
+  })
+  onApply;
   final Future<void> Function()? onClear;
 
   @override
   Widget build(BuildContext context) {
     final tokens = context.mapflowTokens;
-    final label = query.isEmpty ? 'Поиск' : query;
+    final label = transcript.isEmpty ? 'Голосом' : transcript;
 
     return Padding(
       padding: const EdgeInsets.only(top: 8, left: 70, right: 70),
@@ -364,7 +368,7 @@ class _MapSearchButton extends StatelessWidget {
               mainAxisSize: MainAxisSize.min,
               children: [
                 const SizedBox(width: 12),
-                const Icon(Icons.auto_awesome_outlined, size: 18),
+                const Icon(Icons.mic_none_rounded, size: 18),
                 const SizedBox(width: 8),
                 Flexible(
                   child: Text(
@@ -392,40 +396,141 @@ class _MapSearchButton extends StatelessWidget {
   }
 
   Future<void> _openSearch(BuildContext context) async {
-    final controller = TextEditingController(text: query);
-    final result = await showDialog<String>(
+    final result = await showDialog<_VoiceFilterAudio>(
       context: context,
-      builder: (context) {
-        return AlertDialog(
-          contentPadding: const EdgeInsets.fromLTRB(18, 18, 18, 8),
-          content: TextField(
-            controller: controller,
-            autofocus: true,
-            textInputAction: TextInputAction.search,
-            decoration: const InputDecoration(
-              prefixIcon: Icon(Icons.auto_awesome_outlined),
-              hintText: 'Что ищем?',
-            ),
-            onSubmitted: (value) => Navigator.of(context).pop(value),
-          ),
-          actions: [
-            TextButton(
-              onPressed: () => Navigator.of(context).pop(),
-              child: const Text('Отмена'),
-            ),
-            FilledButton(
-              onPressed: () => Navigator.of(context).pop(controller.text),
-              child: const Text('Найти'),
-            ),
-          ],
-        );
-      },
+      builder: (_) => const _VoiceFilterDialog(),
     );
-    controller.dispose();
     if (result == null) {
       return;
     }
-    await onSearch(result);
+    await onApply(
+      audioContentBase64: result.audioContentBase64,
+      audioMimeType: result.audioMimeType,
+    );
+  }
+}
+
+class _VoiceFilterAudio {
+  const _VoiceFilterAudio({
+    required this.audioContentBase64,
+    required this.audioMimeType,
+  });
+
+  final String audioContentBase64;
+  final String audioMimeType;
+}
+
+class _VoiceFilterDialog extends StatefulWidget {
+  const _VoiceFilterDialog();
+
+  @override
+  State<_VoiceFilterDialog> createState() => _VoiceFilterDialogState();
+}
+
+class _VoiceFilterDialogState extends State<_VoiceFilterDialog> {
+  final _waveController = WaveformRecorderController(
+    interval: const Duration(milliseconds: 60),
+    config: const RecordConfig(
+      numChannels: 1,
+      sampleRate: 44100,
+      autoGain: true,
+      echoCancel: true,
+      noiseSuppress: true,
+    ),
+  );
+
+  var _recording = false;
+  var _submitting = false;
+  var _hasRecording = false;
+
+  @override
+  void dispose() {
+    _waveController.dispose();
+    super.dispose();
+  }
+
+  Future<void> _toggleRecording() async {
+    if (_recording) {
+      await _waveController.stopRecording();
+      setState(() {
+        _recording = false;
+        _hasRecording = true;
+      });
+      return;
+    }
+
+    await _waveController.startRecording();
+    setState(() => _recording = true);
+  }
+
+  Future<void> _apply() async {
+    if (_recording) {
+      await _waveController.stopRecording();
+      setState(() {
+        _recording = false;
+        _hasRecording = true;
+      });
+    }
+    final file = _waveController.file;
+    if (file == null) {
+      throw StateError('Voice filter recording file is required.');
+    }
+    setState(() => _submitting = true);
+    final bytes = await file.readAsBytes();
+    if (!mounted) {
+      return;
+    }
+    Navigator.of(context).pop(
+      _VoiceFilterAudio(
+        audioContentBase64: base64Encode(bytes),
+        audioMimeType: file.mimeType ?? 'audio/wav',
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      contentPadding: const EdgeInsets.fromLTRB(18, 18, 18, 8),
+      content: SizedBox(
+        width: 260,
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            IconButton.filled(
+              onPressed: _submitting ? null : _toggleRecording,
+              icon: Icon(_recording ? Icons.stop_rounded : Icons.mic_rounded),
+              iconSize: 34,
+              style: IconButton.styleFrom(
+                fixedSize: const Size.square(82),
+                minimumSize: const Size.square(82),
+              ),
+              tooltip: _recording ? 'Стоп' : 'Записать',
+            ),
+            const SizedBox(height: 16),
+            Text(
+              _recording ? 'Слушаю' : 'Голосовой фильтр',
+              style: const TextStyle(fontWeight: FontWeight.w900),
+            ),
+          ],
+        ),
+      ),
+      actions: [
+        TextButton(
+          onPressed: _submitting ? null : () => Navigator.of(context).pop(),
+          child: const Text('Отмена'),
+        ),
+        FilledButton(
+          onPressed: _submitting || !_hasRecording ? null : _apply,
+          child: _submitting
+              ? const SizedBox.square(
+                  dimension: 18,
+                  child: CircularProgressIndicator(strokeWidth: 2),
+                )
+              : const Text('Применить'),
+        ),
+      ],
+    );
   }
 }