fix delete conversation logic

lib/src/utils.dart

@@ -2,6 +2,8 @@ import 'package:flutter/material.dart';
 import 'package:stream_chat/stream_chat.dart';
 import 'package:url_launcher/url_launcher.dart';
 
+import '../stream_chat_flutter.dart';
+
 Future<void> launchURL(BuildContext context, String url) async {
   if (await canLaunch(url)) {
     await launch(url);
@@ -15,33 +17,76 @@ Future<void> launchURL(BuildContext context, String url) async {
 }
 
 Future<bool> showConfirmationDialog(
-  BuildContext context,
+  BuildContext context, {
+  String title,
+  Widget icon,
   String question,
-) {
-  return showDialog<bool>(
-    context: context,
-    builder: (context) {
-      return AlertDialog(
-        title: Text(question),
-        actions: <Widget>[
-          FlatButton(
-            child: Text('Ok'),
-            onPressed: () => Navigator.pop(
-              context,
-              true,
+  String okText,
+  String cancelText,
+}) {
+  return showModalBottomSheet(
+      backgroundColor: Colors.white,
+      context: context,
+      shape: RoundedRectangleBorder(
+          borderRadius: BorderRadius.only(
+        topLeft: Radius.circular(16.0),
+        topRight: Radius.circular(16.0),
+      )),
+      builder: (context) {
+        return Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            SizedBox(
+              height: 26.0,
             ),
-          ),
-          FlatButton(
-            child: Text('Cancel'),
-            onPressed: () => Navigator.pop(
-              context,
-              false,
+            if (icon != null) icon,
+            SizedBox(
+              height: 26.0,
             ),
-          ),
-        ],
-      );
-    },
-  );
+            Text(
+              title,
+              style: TextStyle(fontWeight: FontWeight.bold, fontSize: 16.0),
+            ),
+            SizedBox(
+              height: 7.0,
+            ),
+            Text(question),
+            SizedBox(
+              height: 36.0,
+            ),
+            Container(
+              color: Color(0xffe6e6e6),
+              height: 1.0,
+            ),
+            Row(
+              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+              children: [
+                FlatButton(
+                  child: Text(
+                    cancelText,
+                    style: TextStyle(
+                        color: Colors.black.withOpacity(0.5),
+                        fontWeight: FontWeight.w400),
+                  ),
+                  onPressed: () {
+                    Navigator.of(context).pop();
+                  },
+                ),
+                FlatButton(
+                  child: Text(
+                    okText,
+                    style: TextStyle(
+                        color: Colors.red, fontWeight: FontWeight.w400),
+                  ),
+                  onPressed: () {
+                    Navigator.pop(context, true);
+                  },
+                ),
+              ],
+            ),
+          ],
+        );
+      });
 }
 
 /// Get random png with initials