Re add chatwoot (#1044)

* Revert "Revert "Cw 397 chatwoot live support (#1011)""

This reverts commit ecdc7baa2e3c8f46c3c5013f56c8b864f088ec9f.

* Re-add chatwoot
Change chatwoot base url

lib/src/screens/support_chat/support_chat_page.dart

@@ -0,0 +1,38 @@
+import 'package:cake_wallet/generated/i18n.dart';
+import 'package:cake_wallet/src/screens/base_page.dart';
+import 'package:cake_wallet/src/screens/support_chat/widgets/chatwoot_widget.dart';
+import 'package:cake_wallet/view_model/support_view_model.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+
+
+class SupportChatPage extends BasePage {
+  SupportChatPage(this.supportViewModel, {required this.secureStorage});
+
+  final SupportViewModel supportViewModel;
+  final FlutterSecureStorage secureStorage;
+
+  @override
+  String get title => S.current.settings_support;
+
+  @override
+  AppBarStyle get appBarStyle => AppBarStyle.regular;
+
+  @override
+  Widget body(BuildContext context) => FutureBuilder<String>(
+        future: getCookie(),
+        builder: (BuildContext context, AsyncSnapshot<String> snapshot) {
+          print(snapshot.data);
+          if (snapshot.hasData)
+            return ChatwootWidget(
+              secureStorage,
+              supportUrl: supportViewModel.fetchUrl(authToken: snapshot.data!)
+            );
+          return Container();
+        },
+      );
+
+  Future<String> getCookie() async {
+    return await secureStorage.read(key: COOKIE_KEY) ?? "";
+  }
+}

lib/src/screens/support_chat/widgets/chatwoot_widget.dart

@@ -0,0 +1,62 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_inappwebview/flutter_inappwebview.dart';
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+
+const COOKIE_KEY = 'chatwootCookie';
+
+class ChatwootWidget extends StatefulWidget {
+  ChatwootWidget(this.secureStorage, {required this.supportUrl});
+
+  final FlutterSecureStorage secureStorage;
+  final String supportUrl;
+
+  @override
+  ChatwootWidgetState createState() => ChatwootWidgetState();
+}
+
+class ChatwootWidgetState extends State<ChatwootWidget> {
+  final GlobalKey _webViewkey = GlobalKey();
+
+  @override
+  Widget build(BuildContext context) => InAppWebView(
+        key: _webViewkey,
+        initialOptions: InAppWebViewGroupOptions(
+          crossPlatform: InAppWebViewOptions(transparentBackground: true),
+        ),
+        initialUrlRequest: URLRequest(url: Uri.tryParse(widget.supportUrl)),
+        onWebViewCreated: (InAppWebViewController controller) {
+          controller.addWebMessageListener(
+            WebMessageListener(
+              jsObjectName: 'ReactNativeWebView',
+              onPostMessage: (String? message, Uri? sourceOrigin, bool isMainFrame,
+                  JavaScriptReplyProxy replyProxy) {
+                final shortenedMessage = message?.substring(16);
+                if (shortenedMessage != null && isJsonString(shortenedMessage)) {
+                  final parsedMessage = jsonDecode(shortenedMessage);
+                  final eventType = parsedMessage["event"];
+                  if (eventType == 'loaded') {
+                    final authToken = parsedMessage["config"]["authToken"];
+                    print(authToken);
+                    storeCookie(authToken as String);
+                  }
+                }
+              },
+            ),
+          );
+        },
+      );
+
+  bool isJsonString(String str) {
+    try {
+      jsonDecode(str);
+    } catch (e) {
+      return false;
+    }
+    return true;
+  }
+
+  Future<void> storeCookie(String value) async =>
+      await widget.secureStorage.write(key: COOKIE_KEY, value: value);
+}