Simplify code

lib/ui/screens/group_sections/group_posts_section.dart

@@ -0,0 +1,53 @@
+import 'package:comunic/enums/post_target.dart';
+import 'package:comunic/helpers/posts_helper.dart';
+import 'package:comunic/models/advanced_group_info.dart';
+import 'package:comunic/ui/widgets/post_create_form_widget.dart';
+import 'package:comunic/ui/widgets/posts_list_widget.dart';
+/// Group posts section
+///
+/// @author Pierre Hubert
+import 'package:flutter/material.dart';
+
+class GroupPostsSection extends StatefulWidget {
+  final AdvancedGroupInfo group;
+
+  const GroupPostsSection({
+    Key key,
+    @required this.group,
+  })  : assert(group != null),
+        super(key: key);
+
+  @override
+  _GroupPostsSectionState createState() => _GroupPostsSectionState();
+}
+
+class _GroupPostsSectionState extends State<GroupPostsSection> {
+  final _postsKey = GlobalKey<PostsListWidgetState>();
+
+  /// Add create post target
+  Widget _buildPostCreationArea() {
+    if (!widget.group.canCreatePost) return Container();
+
+    return PostCreateFormWidget(
+      postTarget: PostTarget.GROUP_PAGE,
+      targetID: widget.group.id,
+      onCreated: () => _postsKey.currentState.loadPostsList(getOlder: false),
+    );
+  }
+
+  /// Build the list of posts of the group
+  @override
+  Widget build(BuildContext context) {
+    return PostsListWidget(
+      key: _postsKey,
+      topWidgets: <Widget>[
+        _buildPostCreationArea(),
+      ],
+      getPostsList: () => PostsHelper().getGroupPosts(widget.group.id),
+      showPostsTarget: false,
+      userNamesClickable: true,
+      getOlder: (from) =>
+          PostsHelper().getGroupPosts(widget.group.id, from: from),
+    );
+  }
+}