add channel file and media display screens

2021-04-08 16:54:50 +02:00
parent 2cf899dca4
commit 2d45c3edee
4 changed files with 433 additions and 0 deletions
@@ -0,0 +1,180 @@
+import 'package:flutter/material.dart';
+import 'package:stream_chat_flutter/stream_chat_flutter.dart';
+
+class ChannelFileDisplayScreen extends StatefulWidget {
+  /// The sorting used for the channels matching the filters.
+  /// Sorting is based on field and direction, multiple sorting options can be provided.
+  /// You can sort based on last_updated, last_message_at, updated_at, created_at or member_count.
+  /// Direction can be ascending or descending.
+  final List<SortOption> sortOptions;
+
+  /// Pagination parameters
+  /// limit: the number of users to return (max is 30)
+  /// offset: the offset (max is 1000)
+  /// message_limit: how many messages should be included to each channel
+  final PaginationParams paginationParams;
+
+  /// The builder used when the file list is empty.
+  final WidgetBuilder emptyBuilder;
+
+  const ChannelFileDisplayScreen({
+    this.sortOptions,
+    this.paginationParams,
+    this.emptyBuilder,
+  });
+
+  @override
+  _ChannelFileDisplayScreenState createState() =>
+      _ChannelFileDisplayScreenState();
+}
+
+class _ChannelFileDisplayScreenState extends State<ChannelFileDisplayScreen> {
+  @override
+  void initState() {
+    super.initState();
+    final messageSearchBloc = MessageSearchBloc.of(context);
+    messageSearchBloc.search(
+      filter: {
+        'cid': {
+          r'$in': [StreamChannel.of(context).channel.cid]
+        }
+      },
+      messageFilter: {
+        'attachments.type': {
+          r'$in': ['file'],
+        },
+      },
+      sort: widget.sortOptions,
+      pagination: widget.paginationParams,
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      backgroundColor: StreamChatTheme.of(context).colorTheme.white,
+      appBar: AppBar(
+        brightness: Theme.of(context).brightness,
+        elevation: 1,
+        centerTitle: true,
+        title: Text(
+          'Files',
+          style: TextStyle(
+              color: StreamChatTheme.of(context).colorTheme.black,
+              fontSize: 16.0),
+        ),
+        leading: Center(
+          child: InkWell(
+            onTap: () {
+              Navigator.of(context).pop();
+            },
+            child: Container(
+              width: 24.0,
+              height: 24.0,
+              child: StreamSvgIcon.left(
+                color: StreamChatTheme.of(context).colorTheme.black,
+                size: 24.0,
+              ),
+            ),
+          ),
+        ),
+        backgroundColor: StreamChatTheme.of(context).colorTheme.white,
+      ),
+      body: _buildMediaGrid(),
+    );
+  }
+
+  Widget _buildMediaGrid() {
+    final messageSearchBloc = MessageSearchBloc.of(context);
+
+    return StreamBuilder<List<GetMessageResponse>>(
+      builder: (context, snapshot) {
+        if (snapshot.data == null) {
+          return Center(
+            child: const CircularProgressIndicator(),
+          );
+        }
+
+        if (snapshot.data.isEmpty) {
+          if (widget.emptyBuilder != null) {
+            return widget.emptyBuilder(context);
+          }
+          return Center(
+            child: Column(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                StreamSvgIcon.files(
+                  size: 136.0,
+                  color: StreamChatTheme.of(context).colorTheme.greyGainsboro,
+                ),
+                SizedBox(height: 16.0),
+                Text(
+                  'No Files',
+                  style: TextStyle(
+                    fontSize: 14.0,
+                    color: StreamChatTheme.of(context).colorTheme.black,
+                  ),
+                ),
+                SizedBox(height: 8.0),
+                Text(
+                  'Files sent in this chat will appear here',
+                  textAlign: TextAlign.center,
+                  style: TextStyle(
+                    fontSize: 14.0,
+                    color: StreamChatTheme.of(context)
+                        .colorTheme
+                        .black
+                        .withOpacity(0.5),
+                  ),
+                ),
+              ],
+            ),
+          );
+        }
+
+        final media = <Attachment, Message>{};
+
+        for (var item in snapshot.data) {
+          item.message.attachments.where((e) => e.type == 'file').forEach((e) {
+            media[e] = item.message;
+          });
+        }
+
+        return LazyLoadScrollView(
+          onEndOfPage: () => messageSearchBloc.search(
+            filter: {
+              'cid': {
+                r'$in': [StreamChannel.of(context).channel.cid]
+              }
+            },
+            messageFilter: {
+              'attachments.type': {
+                r'$in': ['file']
+              },
+            },
+            sort: widget.sortOptions,
+            pagination: widget.paginationParams.copyWith(
+              offset: messageSearchBloc.messageResponses?.length ?? 0,
+            ),
+          ),
+          child: ListView.builder(
+            itemBuilder: (context, position) {
+              return Padding(
+                padding: const EdgeInsets.all(1.0),
+                child: Padding(
+                  padding: const EdgeInsets.all(8.0),
+                  child: FileAttachment(
+                    message: media.values.toList()[position],
+                    attachment: media.keys.toList()[position],
+                  ),
+                ),
+              );
+            },
+            itemCount: media.length,
+          ),
+        );
+      },
+      stream: messageSearchBloc.messagesStream,
+    );
+  }
+}