feat: add imageProviderResolver in the ChatOptions to override the default CachedNetworkImageProvider

CHANGELOG.md

@@ -20,6 +20,7 @@
 - Changed the ChatBottomInputSection to be multiline and go from 45px to 120px in height depending on how many lines are in the textfield
 - Added chatScreenBuilder to the userstory configuration to customize the specific chat screen with a ChatModel as argument
 - Added senderTitleResolver to the ChatOptions to resolve the title of the sender in the chat message
+- Added imageProviderResolver to the ChatOptions to resolve ImageProvider for all images in the userstory
 
 ## 4.0.0
 - Move to the new user story architecture

packages/flutter_chat/lib/src/config/chat_options.dart

@@ -1,3 +1,4 @@
+import "package:cached_network_image/cached_network_image.dart";
 import "package:chat_repository_interface/chat_repository_interface.dart";
 import "package:flutter/material.dart";
 import "package:flutter_chat/src/config/chat_builders.dart";
@@ -23,6 +24,7 @@ class ChatOptions {
     this.iconDisabledColor,
     this.chatAlignment,
     this.onNoChats,
+    this.imageProviderResolver = _defaultImageProviderResolver,
     ChatRepositoryInterface? chatRepository,
     UserRepositoryInterface? userRepository,
   })  : chatRepository = chatRepository ?? LocalChatRepository(),
@@ -90,6 +92,11 @@ class ChatOptions {
 
   /// [onNoChats] is a function that is triggered when there are no chats.
   final Function? onNoChats;
+
+  /// If [imageProviderResolver] is set, it will be used to get the images for
+  /// the images in the entire userstory. If not provided, CachedNetworkImage
+  /// will be used.
+  final ImageProviderResolver imageProviderResolver;
 }
 
 /// Typedef for the chatTitleResolver function that is used to get a title for
@@ -100,6 +107,13 @@ typedef ChatTitleResolver = String? Function(ChatModel chat);
 /// a sender.
 typedef SenderTitleResolver = String? Function(UserModel? user);
 
+/// Typedef for the imageProviderResolver function that is used to get images
+/// for the userstory.
+typedef ImageProviderResolver = ImageProvider Function(
+  BuildContext context,
+  Uri image,
+);
+
 /// Typedef for the messageThemeResolver function that is used to get a
 /// [MessageTheme] for a message. This can return null so you can fall back to
 /// default values for some messages.
@@ -252,6 +266,12 @@ MessageTheme? _defaultMessageThemeResolver(
 ) =>
     null;
 
+ImageProvider _defaultImageProviderResolver(
+  BuildContext context,
+  Uri image,
+) =>
+    CachedNetworkImageProvider(image.toString());
+
 /// All configurable paddings and whitespaces within the userstory
 class ChatSpacing {
   /// Creates a ChatSpacing object

packages/flutter_chat/lib/src/screens/chat_detail/widgets/default_message_builder.dart

@@ -1,4 +1,3 @@
-import "package:cached_network_image/cached_network_image.dart";
 import "package:chat_repository_interface/chat_repository_interface.dart";
 import "package:flutter/material.dart";
 import "package:flutter_chat/src/config/chat_options.dart";
@@ -241,7 +240,10 @@ class _DefaultChatImage extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
+    var chatScope = ChatScope.of(context);
+    var options = chatScope.options;
     var textTheme = Theme.of(context).textTheme;
+    var imageUrl = message.imageUrl!;
     return Padding(
       padding: const EdgeInsets.symmetric(horizontal: 4),
       child: SizedBox(
@@ -250,11 +252,12 @@ class _DefaultChatImage extends StatelessWidget {
           borderRadius: BorderRadius.circular(12),
           child: AnimatedSize(
             duration: const Duration(milliseconds: 300),
-            child: CachedNetworkImage(
+            child: Image(
-              imageUrl: message.imageUrl!,
+              image:
+                  options.imageProviderResolver(context, Uri.parse(imageUrl)),
               fit: BoxFit.fitWidth,
-              errorWidget: (context, url, error) => Text(
+              errorBuilder: (context, error, stackTrace) => Text(
-                "Something went wrong",
+                "Something went wrong with loading the image",
                 style: textTheme.bodyLarge?.copyWith(
                   color: messageTheme.textColor,
                 ),

packages/flutter_chat/lib/src/screens/chat_detail/widgets/old_message_builder.dart

@@ -1,4 +1,3 @@
-import "package:cached_network_image/cached_network_image.dart";
 import "package:chat_repository_interface/chat_repository_interface.dart";
 import "package:flutter/material.dart";
 import "package:flutter_chat/src/services/date_formatter.dart";
@@ -159,8 +158,11 @@ class OldChatMessageBuilder extends StatelessWidget {
                             ],
                           )
                         : message.isImageMessage
-                            ? CachedNetworkImage(
+                            ? Image(
-                                imageUrl: message.imageUrl ?? "",
+                                image: options.imageProviderResolver(
+                                  context,
+                                  Uri.parse(message.imageUrl!),
+                                ),
                               )
                             : const SizedBox.shrink(),
                   ),
@@ -182,20 +184,24 @@ class _ChatImage extends StatelessWidget {
   final String image;
 
   @override
-  Widget build(BuildContext context) => Container(
+  Widget build(BuildContext context) {
-        clipBehavior: Clip.hardEdge,
+    var chatScope = ChatScope.of(context);
-        decoration: BoxDecoration(
+    var options = chatScope.options;
-          color: Colors.black,
+
-          borderRadius: BorderRadius.circular(40.0),
+    return Container(
-        ),
+      clipBehavior: Clip.hardEdge,
-        width: 40,
+      decoration: BoxDecoration(
-        height: 40,
+        color: Colors.black,
-        child: image.isNotEmpty
+        borderRadius: BorderRadius.circular(40.0),
-            ? CachedNetworkImage(
+      ),
-                fadeInDuration: Duration.zero,
+      width: 40,
-                imageUrl: image,
+      height: 40,
-                fit: BoxFit.cover,
+      child: image.isNotEmpty
-              )
+          ? Image(
-            : null,
+              fit: BoxFit.cover,
-      );
+              image: options.imageProviderResolver(context, Uri.parse(image)),
+            )
+          : null,
+    );
+  }
 }